Patent Publication Number: US-2022221623-A1

Title: Imaging lens assembly, image capturing apparatus and electronic device

Description:
RELATED APPLICATIONS 
     This application claims priority to Taiwan Application Serial Number 110101327, filed Jan. 13, 2021, which is herein incorporated by reference. 
     BACKGROUND 
     Technical Field 
     The present disclosure relates to an imaging lens assembly and an image capturing apparatus. More particularly, the present disclosure relates to an imaging lens assembly and an image capturing apparatus applicable to portable electronic devices. 
     Description of Related Art 
     In recent years, portable electronic devices have developed rapidly. For example, intelligent electronic devices and tablets have been filled in the lives of modern people, and image capturing apparatuses and imaging lens assemblies thereof mounted on portable electronic devices have also prospered. However, as technology advances, the quality requirements of the imaging lens assemblies are becoming higher and higher. Therefore, an imaging lens assembly, which can resist the foreign factors and maintain the imaging quality, needs to be developed. 
     SUMMARY 
     According to one aspect of the present disclosure, an imaging lens assembly has an optical axis, and includes a plurality of optical elements. The optical elements are arranged around the optical axis, wherein the optical elements include a light blocking sheet, and the light blocking sheet includes a through hole surface, a first surface, a second surface, a peripheral surface and a plurality of basin structures. The through hole surface surrounds the optical axis. The first surface is connected to and surrounds the through hole surface. The second surface is connected to and surrounds the through hole surface, and the first surface and the second surface are relatively disposed. The peripheral surface is connected to the first surface and the second surface, and the peripheral surface is farther from the optical axis than the through hole surface from the optical axis. The basin structures are arranged in interval and around the optical axis, each of the basin structures is caved in from the first surface to the second surface, and each of the basin structures protrudes on the second surface. When on a direction passing through each of the basin structures and vertical to the optical axis, a nearest distance between each of the basin structures and the optical axis is Dn, a farthest distance between each of the basin structures and the optical axis is Df, a distance between the through hole surface and the optical axis is r, and a distance between the peripheral surface and the optical axis is R, the following condition is satisfied: 0.2≤(Df−Dn)/(R−r)≤0.98. 
     According to one aspect of the present disclosure, an image capturing apparatus includes the imaging lens assembly of the aforementioned aspect. 
     According to one aspect of the present disclosure, an electronic device includes the image capturing apparatus of the aforementioned aspect and an image sensor, wherein the image sensor is corresponding to the image capturing apparatus, and the image sensor is disposed on an image surface of the imaging lens assembly. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1A  is a schematic view of an imaging lens assembly according to the 1st example of the present disclosure. 
         FIG. 1B  is a partial enlarged view of the imaging lens assembly according to the 1st example in  FIG. 1A . 
         FIG. 1C  is a schematic view of the light blocking sheet according to the 1st example in  FIG. 1A . 
         FIG. 1D  is another schematic view of the light blocking sheet according to the 1st example in  FIG. 1A . 
         FIG. 1E  is a coating schematic view of the light blocking sheet according to the 1st example in  FIG. 1A . 
         FIG. 1F  is another coating schematic view of the light blocking sheet according to the 1st example in  FIG. 1A . 
         FIG. 1G  is a schematic view of parameters of the light blocking sheet according to the 1st example in  FIG. 1A . 
         FIG. 2A  is a schematic view of an imaging lens assembly according to the 2nd example of the present disclosure. 
         FIG. 2B  is a partial enlarged view of the imaging lens assembly according to the 2nd example in  FIG. 2A . 
         FIG. 2C  is a partial schematic view of the imaging lens assembly according to the 2nd example in  FIG. 2A . 
         FIG. 2D  is a schematic view of the light blocking sheet according to the 2nd example in  FIG. 2A . 
         FIG. 2E  is another schematic view of the light blocking sheet according to the 2nd example in  FIG. 2A . 
         FIG. 2F  is a partial cross-sectional view of the light blocking sheet according to the 2nd example in  FIG. 2A . 
         FIG. 2G  is a coating schematic view of the light blocking sheet according to the 2nd example in  FIG. 2F . 
         FIG. 2H  is a schematic view of parameters of the light blocking sheet according to the 2nd example in  FIG. 2A . 
         FIG. 3A  is a schematic view of an imaging lens assembly according to the 3rd example of the present disclosure. 
         FIG. 3B  is a partial enlarged view of the imaging lens assembly according to the 3rd example in  FIG. 3A . 
         FIG. 3C  is a schematic view of the light blocking sheet according to the 3rd example in  FIG. 3A . 
         FIG. 3D  is another schematic view of the light blocking sheet according to the 3rd example in  FIG. 3A . 
         FIG. 3E  is a partial cross-sectional view of the light blocking sheet according to the 3rd example in  FIG. 3A . 
         FIG. 3F  is a coating schematic view of the light blocking sheet according to the 3rd example in  FIG. 3A . 
         FIG. 3G  is a schematic view of parameters of the light blocking sheet according to the 3rd example in  FIG. 3A . 
         FIG. 4A  is a schematic view of an imaging lens assembly according to the 4th example of the present disclosure. 
         FIG. 4B  is a partial enlarged view of the imaging lens assembly according to the 4th example in  FIG. 4A . 
         FIG. 4C  is a schematic view of the light blocking sheet according to the 4th example in  FIG. 4A . 
         FIG. 4D  is another schematic view of the light blocking sheet according to the 4th example in  FIG. 4A . 
         FIG. 4E  is a schematic view of parameters of the light blocking sheet according to the 4th example in  FIG. 4A . 
         FIG. 5A  is a schematic view of an imaging lens assembly according to the 5th example of the present disclosure. 
         FIG. 5B  is a partial enlarged view of the imaging lens assembly according to the 5th example in  FIG. 5A . 
         FIG. 5C  is another partial enlarged view of the imaging lens assembly according to the 5th example in  FIG. 5A . 
         FIG. 5D  is a schematic view of the light blocking sheet according to the 5th example in  FIG. 5A . 
         FIG. 5E  is another schematic view of the light blocking sheet according to the 5th example in  FIG. 5A . 
         FIG. 5F  is a schematic view of parameters of the light blocking sheet according to the 5th example in  FIG. 5A . 
         FIG. 6A  is a schematic view of an imaging lens assembly according to the 6th example of the present disclosure. 
         FIG. 6B  is a partial enlarged view of the imaging lens assembly according to the 6th example in  FIG. 6A . 
         FIG. 6C  is a schematic view of the light blocking sheet according to the 6th example in  FIG. 6A . 
         FIG. 6D  is another schematic view of the light blocking sheet according to the 6th example in  FIG. 6A . 
         FIG. 6E  is a schematic view of parameters of the light blocking sheet according to the 6th example in  FIG. 6A . 
         FIG. 7A  is a schematic view of an imaging lens assembly according to the 7th example of the present disclosure. 
         FIG. 7B  is a partial enlarged view of the imaging lens assembly according to the 7th example in  FIG. 7A . 
         FIG. 7C  is another partial enlarged view of the imaging lens assembly according to the 7th example in  FIG. 7A . 
         FIG. 7D  is a schematic view of the light blocking sheet according to the 7th example in  FIG. 7A . 
         FIG. 7E  is another schematic view of the light blocking sheet according to the 7th example in  FIG. 7A . 
         FIG. 7F  is a schematic view of parameters of the light blocking sheet according to the 7th example in  FIG. 7A . 
         FIG. 8A  is a schematic view of an electronic device according to the 8th example of the present disclosure. 
         FIG. 8B  is another schematic view of the electronic device according to the 8th example in  FIG. 8A . 
         FIG. 8C  is a schematic view of an image captured by the ultra-wide angle image capturing apparatuses according to the 8th example in  FIG. 8A . 
         FIG. 8D  is a schematic view of an image captured by the wide angle image capturing apparatuses according to the 8th example in  FIG. 8A . 
         FIG. 8E  is a schematic view of an image captured by the telephoto image capturing apparatus according to the 8th example in  FIG. 8A . 
         FIG. 8F  is a schematic view of an image captured by the ultra-telephoto image capturing apparatus according to the 8th example in  FIG. 8A . 
     
    
    
     DETAILED DESCRIPTION 
     The present disclosure provides an imaging lens assembly, and the imaging lens assembly has an optical axis and includes a plurality of optical elements. The optical elements are arranged around the optical axis, wherein the optical elements include a light blocking sheet, and the light blocking sheet includes a through hole surface, a first surface, a second surface, a peripheral surface and a plurality of basin structures. The through hole surface surrounds the optical axis to form a through hole. The first surface is connected to and surrounds the through hole surface. The second surface is connected to and surrounds the through hole surface, and the first surface and the second surface are relatively disposed. The peripheral surface is connected to the first surface and the second surface, and the peripheral surface is farther from the optical axis than the through hole surface from the optical axis. The basin structures are arranged in interval and around the optical axis, each of the basin structures are caved in from the first surface to the second surface, and each of the basin structures protrudes on the second surface. When on a direction passing through each of the basin structures and vertical to the optical axis, a nearest distance between each of the basin structures and the optical axis is Dn, a farthest distance between each of the basin structures and the optical axis is Df, a distance between the through hole surface and the optical axis is r, and a distance between the peripheral surface and the optical axis is R, the following condition is satisfied: 0.2≤(Df−Dn)/(R−r)≤0.98. 
     In detail, the light blocking sheet can be manufactured via the stamping process. The residual stress is possibly acted on the light blocking sheet after the stamping process, and the light blocking sheet may be deformed by the residual stress. The imaging quality would be influenced by the deformation of the light blocking sheet. Especially, when the through hole of the light blocking sheet is deformed or shifted, the occurrence of unexpected stray light may take place. Hence, the resistant to the deformation along the optical axis of the light blocking sheet can be provided by the basin structures of the light blocking sheet, and the deformation and the displacement of the through hole can be reduced. Therefore, the imaging quality can be maintained, the imaging quality is hardly changed over time, and the foreign factors, which influence the light blocking sheet, can be further resisted. In particular, the foreign factors are the impact caused by falling, the temperature variation, the humidity variation or the high temperature and high humidity environment, but the present disclosure is not limited thereto. 
     Furthermore, each of the basin structures at a radiation direction away from the optical axis has a certain proportion length, and the resistance to the deformation of the light blocking sheet along the optical axis can be provided to reduce the deformation and the displacement of the through hole. 
     The through hole is formed by the through hole surface surrounding the optical axis, and the through hole can be an aperture stop of the imaging lens assembly. Therefore, the non-imaging light can be blocked, and a clear aperture can be adjusted. 
     Each of the basin structures can extend and gradually expand towards a direction away from the optical axis. Therefore, the residual stress during the process can be further dispersed. 
     The first surface of the light blocking sheet can face towards one of an object side and an image side of the imaging lens assembly. In particular, the second surface of the light blocking sheet is relatively disposed on the other one of the object side and the image side of the imaging lens assembly. 
     The light blocking sheet can further include a plurality of reverse basin structures arranged in interval and around the optical axis, each of the reverse basin structures is caved in from the second surface to the first surface, and each of the reverse basin structures protrudes on the first surface to form a convex surface. The displacement of the through hole along the optical axis can be further resisted by the cooperation between the basin structures and the reverse basin structures. 
     The basin structures and the reverse basin structures can be arranged in interval on a circumferential direction centered on the optical axis. Or, the reverse basin structures can be farther from the optical axis than the basin structures from the optical axis. Therefore, the foreign factors, which influence the light blocking sheet, can be further resisted. 
     The light blocking sheet can be made of a plastic material, and the light blocking sheet can further include a coating layer formed on at least one of the first surface and the second surface. In particular, the plastic material can be polyamide (PA), polyethylene (PE), polyethylene terephthalate (PET), polyimide (PI), polymethyl methacrylate (PMMA) or polypropylene (PP), and the light blocking sheet can be a transparent plastic flake or an opaque plastic flake. When the light blocking sheet is the transparent plastic flake, both sides of the transparent plastic flake can be coated via the coating layer, and the light blocking sheet can be opaque, dark, low-reflected or light-absorbed to obtain the light-blocking effect. When the light blocking sheet is the opaque plastic flake or a dark plastic flake, one side of the opaque plastic flake is coated via the coating layer, the light blocking sheet can have the low reflectivity, and the non-imaging light can be absorbed by the light blocking sheet to further promote the imaging quality. Therefore, the light-blocking effect of the light blocking sheet can be further enhanced, and the stray light can be reduced. 
     When on the direction passing through each of the basin structures and vertical to the optical axis, the nearest distance between each of the basin structures and the optical axis is Dn, the farthest distance between each of the basin structures and the optical axis is Df, the distance between the through hole surface and the optical axis is r, and the distance between the peripheral surface and the optical axis is R, the following condition can be satisfied: 0.45≤(Df−Dn)/(R−r)≤0.95. 
     When on the direction passing through each of the basin structures and vertical to the optical axis, the nearest distance between each of the basin structures and the optical axis is Dn, the farthest distance between each of the basin structures and the optical axis is Df, the distance between the through hole surface and the optical axis is r, and the distance between the peripheral surface and the optical axis is R, the following conditions can be satisfied: 1.01≤Dn/r≤2; and 0.5≤Df/R≤0.99. In particular, when a proper distance between each of the basin structures and the through hole surface is obtained, the deformation of the light blocking sheet can be resisted, and the shape of the through hole can be hardly influenced. Moreover, when a proper distance between each of the basin structures and the peripheral surface is obtained, the warpage of the light blocking sheet is not easily formed. Therefore, the deformation of the light blocking sheet can be avoided when the light blocking sheet bears the adjacent optical elements or a lens barrel of the imaging lens assembly. 
     When on the direction passing through each of the basin structures and vertical to the optical axis, the nearest distance between each of the basin structures and the optical axis is Dn, and the distance between the through hole surface and the optical axis is r, the following condition can be satisfied: 0.03 mm≤Dn−r≤2.0 mm. Therefore, the shape of the through hole can be further maintained. 
     When on the direction passing through each of the basin structures and vertical to the optical axis, the farthest distance between each of the basin structures and the optical axis is Df, and the distance between the peripheral surface and the optical axis is R, the following condition can be satisfied: 0.05 mm≤R−Df≤3.0 mm. Therefore, the deformation and the displacement of the through hole can be further avoided. 
     When on the direction passing through each of the basin structures and vertical to the optical axis, the distance between the peripheral surface and the optical axis is R, and the distance between the through hole surface and the optical axis is r, the following condition can be satisfied: 0.1≤r/R≤0.6. Therefore, the damage of the light blocking sheet owing to the basin structures can be avoided to promote the manufacturability. 
     When a focal length of the imaging lens assembly is f, and on the direction passing through each of the basin structures and vertical to the optical axis, the distance between the through hole surface and the optical axis is r, the following condition can be satisfied: 0.5≤f/2r≤6.4. In particular, f/2r can be defined as the maximum aperture, which the imaging lens assembly can accommodate, that is, the minimum aperture value. The actual aperture is decided by the location and the dimension of the aperture stop of the imaging lens assembly. 
     When a minimum spacing angle between two adjacent of the basin structures on the first surface centered on the optical axis is θ, the following condition can be satisfied: 1.5 degrees≤θ&lt;180 degrees. By a spacing angle between the adjacent of the basin structures, an area of the light blocking sheet excluding the basin structures can be avoided being influenced, and the yield rate can be further enhanced. Further, the following condition can be satisfied: 5 degrees≤θ&lt;150 degrees. 
     When the minimum spacing angle between the two adjacent of the basin structures on the first surface centered on the optical axis is θ, and a total of all of the minimum spacing angles is sum(θ), the following condition can be satisfied: 10 degrees≤sum(θ)≤350 degrees. Therefore, a total number of the basin structures and the spacing angles are in a controllable and proper range to promote the possibility of the mass production. Further, the following condition can be satisfied: 40 degrees≤sum(θ)≤340 degrees. Moreover, the following condition can be satisfied: 180 degrees≤sum(θ)≤300 degrees. 
     When each of the basin structures is caved in from the first surface to the second surface to form a concave surface, and an area of the concave surface is A, the following condition can be satisfied: 0.02 mm 2 ≤A≤1.2 mm 2 . By the proper area of the concave surface, the strength, which resists the foreign factors, of the basin structures can be obtained, and the area of the light blocking sheet excluding the basin structures can be avoided being influenced. 
     When the area of the concave surface is A, and a ratio between a total of the areas of the concave surfaces of the basin structures and an area of the first surface is ratio(A), the following condition can be satisfied: 0.2%≤ratio(A)≤63.0%. By the proper ratio between the areas of the concave surfaces and the area of the first surface, the deformation and the displacement of the through hole can be reduced to maintain the imaging quality. 
     When on the first surface, a depth of each of the basin structures on the optical axis is H, the following condition can be satisfied: 0.005 mm≤H≤0.07 mm. By the proper depth of each of the basin structures, the deformation of the area of the light blocking sheet excluding the basin structures can be avoided to maintain the dimension of the light blocking sheet in a direction vertical to the optical axis. In particular, a datum surface of the first surface can be defined as a connection between an intersection of the first surface and the peripheral surface and an intersection of the first surface and the through hole surface. Further, the following condition can be satisfied: 0.015 mm≤H≤0.05 mm. 
     When a distance between the first surface and the second surface of the light blocking sheet on the optical axis is T, and on the first surface, the depth of each of the basin structures on the optical axis is H, the following condition can be satisfied: 0.2≤H/T≤5.0. Therefore, the light blocking sheet can be avoided being broken owing to the basin structures. 
     When a number of the basin structures is N, the following condition can be satisfied: 3≤N≤32. Therefore, the strength, which resists the foreign factors, of the basin structures can be promoted, and the area of the light blocking sheet excluding the basin structures can be avoided being influenced. Further, the following condition can be satisfied: 4≤N≤12. 
     Each of the aforementioned features of the imaging lens assembly can be utilized in various combinations for achieving the corresponding effects. 
     The present disclosure provides an image capturing apparatus, which includes the aforementioned imaging lens assembly. 
     The present disclosure provides an electronic device, which includes the aforementioned image capturing apparatus and an image sensor. The image sensor is corresponding to the image capturing apparatus, and the image sensor is disposed on an image surface of the imaging lens assembly. 
     According to the aforementioned embodiment, specific examples are provided, and illustrated via figures. 
     1st Example 
       FIG. 1A  is a schematic view of an imaging lens assembly  100  according to the 1st example of the present disclosure. In  FIG. 1A , the imaging lens assembly  100  has an optical axis X, and includes a plurality of optical elements and a lens barrel  140 . It should be mentioned that the imaging lens assembly  100  can further include a plurality of lens barrels, each of the lens barrels includes at least one optical element, and the optical elements are arranged along the optical axis X, but the present disclosure is not limited thereto. 
     Furthermore, the optical elements can be a lens element, a flat lens element, a light blocking sheet, a spacer, a retainer or a light-folding element, wherein the imaging lens assembly  100  can focus, the light path can be adjusted or the imaging quality can be improved by the aforementioned optical elements, and the lens barrel  140  can accommodate the optical elements. According to the  1 st example, the imaging lens assembly  100 , in order from an object side to an image side, includes a lens element  111 , a light blocking sheet  121 , a lens element  112 , a light blocking sheet  122 , a lens element  113 , a light blocking sheet  123 , a lens element  114 , a light blocking sheet  124 , a lens element  115 , a light blocking sheet  125 , a lens element  116 , a light blocking sheet  126 , a lens element  117  and a retainer  127 . Further, numbers, structures, surface shapes and so on of the optical elements can be disposed according to different imaging demand, other optical elements can be disposed on demands, and the present disclosure is not limited thereto. 
       FIG. 1B  is a partial enlarged view of the imaging lens assembly  100  according to the  1 st example in  FIG. 1A .  FIG. 10  is a schematic view of the light blocking sheet  122  according to the  1 st example in  FIG. 1A .  FIG. 1D  is another schematic view of the light blocking sheet  122  according to the 1st example in  FIG. 1A . In  FIGS. 1B to 1D , the light blocking sheet  122  includes a through hole surface  131 , a first surface  132 , a second surface  133 , a peripheral surface  134  and a plurality of basin structures  135 . The through hole surface  131  surrounds the optical axis X to form an aperture stop of the imaging lens assembly  100 . In particular, a through hole is formed by the through hole surface  131  surrounding the optical axis X, and the through hole can be the aperture stop of the imaging lens assembly  100 . The first surface  132  is connected to and surrounds the through hole surface  131 . The second surface  133  is connected to and surrounds the through hole surface  131 , and the first surface  132  and the second surface  133  are relatively disposed. The peripheral surface  134  is connected to the first surface  132  and the second surface  133 , and the peripheral surface  134  is farther from the optical axis X than the through hole surface  131  from the optical axis X. 
     In detail, the light blocking sheet  122  can be used to block the non-imaging light and adjust the clear aperture. Further, the light blocking sheet  122  can be manufactured via the stamping process. The residual stress is possibly acted on the light blocking sheet  122  after the stamping process, and the light blocking sheet  122  may be deformed by the residual stress. The imaging quality would be influenced by the deformation of the light blocking sheet  122 . Especially, when the through hole is deformed or shifted, the occurrence of unexpected stray light may take place. Hence, the resistant to the deformation along the optical axis X of the light blocking sheet  122  can be provided by the basin structures  135  of the light blocking sheet  122 , and the deformation and the displacement of the through hole can be reduced. Therefore, the imaging quality can be maintained, the imaging quality is hardly changed over time, and the foreign factors, which influence the light blocking sheet  122 , can be further resisted. In particular, the foreign factors are the impact caused by falling, the temperature variation, the humidity variation or the high temperature and high humidity environment. 
     In  FIG. 1B , the first surface  132  of the light blocking sheet  122  faces towards an image side of the imaging lens assembly  100 , the second surface  133  of the light blocking sheet  122  faces towards an object side of the imaging lens assembly  100 , the light blocking sheet  122  is interposed between the lens elements  112 ,  113 , and the interposing position is farther from the optical axis X than the basin structures  135  from the optical axis X. 
     In  FIGS. 1C and 1D , the basin structures  135  are arranged in interval and around the optical axis X, each of the basin structures  135  is caved in from the first surface  132  to the second surface  133 , and each of the basin structures  135  protrudes on the second surface  133  to form a concave surface  135   a . In detail, the shape of each of the concave surfaces  135   a  is oblong, wherein each of the concave surfaces  135   a  has two parallel line segments  135   b  and two semi arcs  135   c , the parallel line segments  135   b  extend towards a direction away from the optical axis X and are parallel to each other, and the semi arcs  135   c  are connected to two sides of the parallel line segments  135   b  away from the optical axis X and the other two sides of the parallel line segments  135   b  close to the optical axis X, respectively. 
       FIG. 1E  is a coating schematic view of the light blocking sheet  122  according to the 1st example in  FIG. 1A .  FIG. 1F  is another coating schematic view of the light blocking sheet  122  according to the 1st example in  FIG. 1A . In  FIGS. 1E and 1F , the light blocking sheet  122  can be made of a plastic material, and the light blocking sheet  122  can further include a coating layer C formed on at least one of the first surface  132  and the second surface  133 . In particular, the plastic material can be PA, PE, PET, PI, PMMA or PP, and the light blocking sheet  122  can be a transparent plastic flake P 1  or an opaque plastic flake P 2 . 
     In  FIG. 1E , when the light blocking sheet  122  is the transparent plastic flake P 1 , both sides of the transparent plastic flake P 1  are coated via the coating layer C. By the coating layer C, the light blocking sheet  122  can be opaque and dark, and the light blocking sheet  122  has the low-reflected effect or the light-absorbed effect to promote the light-blocking effect and reduce the stray light. 
     In  FIG. 1F , when the light blocking sheet  122  is the opaque plastic flake P 2 , the light blocking sheet  122  can be dark, and at least one side of the opaque plastic flake P 2  can be coated via the coating layer C. Therefore, the light blocking sheet  122  can be low-reflected, and the non-imaging light can be absorbed by the light blocking sheet  122  to further promote the imaging quality. 
     In  FIGS. 1E and 1F , it should be mentioned that a thickness ratio of the coating layer C to the transparent plastic flake P 1  and a thickness ratio of the coating layer C to the opaque plastic flake P 2  are not illustrated according to the real ratio in order to clearly indicate the composition of the light blocking sheet  122 . 
       FIG. 1G  is a schematic view of parameters of the light blocking sheet  122  according to the 1st example in  FIG. 1A . In  FIGS. 1B and 1G , when on a direction passing through each of the basin structures  135  and vertical to the optical axis X, a nearest distance between each of the basin structures  135  and the optical axis X is Dn, a farthest distance between each of the basin structures  135  and the optical axis X is Df, a distance between the through hole surface  131  and the optical axis X is r, and a distance between the peripheral surface  134  and the optical axis X is R; a focal length of the imaging lens assembly  100  is f; a minimum spacing angle between two adjacent of the basin structures  135  on the first surface  132  centered on the optical axis X is θ, each of the minimum spacing angles of each two adjacent of the basin structures  135  is the same, and a total of all of the minimum spacing angles is sum(θ), an area of the concave surface  135   a  is A, and a ratio between a total of the areas of the concave surfaces  135   a  of the basin structures  135  and an area of the first surface  132  is ratio(A); on the first surface  132 , a depth of each of the basin structures  135  on the optical axis X is H; a distance between the first surface  132  and the second surface  133  of the light blocking sheet  122  on the optical axis X is T; a number of the basin structures  135  is N, the following conditions of the Table 1 are satisfied. 
     
       
         
           
               
             
               
                 TABLE 1 
               
               
                   
               
               
                 1st example 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 r (mm) 
                 0.795 
                 r/R 
                 0.232 
               
               
                   
                 R (mm) 
                 3.425 
                 f/2r 
                 1.509 
               
               
                   
                 Df (mm) 
                 3.1 
                 H (mm) 
                 0.05 
               
               
                   
                 Dn (mm) 
                 1.2 
                 H/T 
                 2.00 
               
               
                   
                 (Df-Dn)/(R-r) 
                 0.72 
                 N 
                 8 
               
               
                   
                 Dn/r 
                 1.509 
                 θ (degrees) 
                 25.1 
               
               
                   
                 Df/R 
                 0.905 
                 sum(θ) (degrees) 
                 200.8 
               
               
                   
                 Dn-r (mm) 
                 0.405 
                 A (mm 2 ) 
                 0.6857 
               
               
                   
                 R-Df (mm) 
                 0.325 
                 ratio(A) (%) 
                 15.73 
               
               
                   
                   
               
            
           
         
       
     
     2nd Example 
       FIG. 2A  is a schematic view of an imaging lens assembly  200  according to the 2nd example of the present disclosure. In  FIG. 2A , the imaging lens assembly  200  has an optical axis X, and includes a plurality of optical elements and a lens barrel  240 . It should be mentioned that the imaging lens assembly  200  can further include a plurality of lens barrels, each of the lens barrels includes at least one optical element, and the optical elements are arranged along the optical axis X, but the present disclosure is not limited thereto. 
     Furthermore, the optical elements can be a lens element, a flat lens element, a light blocking sheet, a spacer, a retainer or a light-folding element, wherein the imaging lens assembly  200  can focus, the light path can be adjusted or the imaging quality can be improved by the aforementioned optical elements, and the lens barrel  240  can accommodate the optical elements. According to the 2nd example, the imaging lens assembly  200 , in order from an object side to an image side, includes a lens element  211 , a light blocking sheet  221 , a lens element  212  and a lens element  213 . Further, numbers, structures, surface shapes and so on of the optical elements can be disposed according to different imaging demand, other optical elements can be disposed on demands, and the present disclosure is not limited thereto. 
       FIG. 2B  is a partial enlarged view of the imaging lens assembly  200  according to the 2nd example in  FIG. 2A .  FIG. 2C  is a partial schematic view of the imaging lens assembly  200  according to the 2nd example in  FIG. 2A .  FIG. 2D  is a schematic view of the light blocking sheet  221  according to the 2nd example in  FIG. 2A .  FIG. 2E  is another schematic view of the light blocking sheet  221  according to the 2nd example in  FIG. 2A .  FIG. 2F  is a partial cross-sectional view of the light blocking sheet  221  according to the 2nd example in  FIG. 2A . In  FIGS. 2B to 2F , the light blocking sheet  221  includes a through hole surface  231 , a first surface  232 , a second surface  233 , a peripheral surface  234  and a plurality of basin structures  235 , and each of the basin structures  235  can be seen a U-shaped structure from a cross-section parallel to the optical axis X. The through hole surface  231  surrounds the optical axis X to form an aperture stop of the imaging lens assembly  200 . In particular, a through hole is formed by the through hole surface  231  surrounding the optical axis X, and the through hole can be the aperture stop of the imaging lens assembly  200 . The first surface  232  is connected to and surrounds the through hole surface  231 . The second surface  233  is connected to and surrounds the through hole surface  231 , and the first surface  232  and the second surface  233  are relatively disposed. The peripheral surface  234  is connected to the first surface  232  and the second surface  233 , and the peripheral surface  234  is farther from the optical axis X than the through hole surface  231  from the optical axis X. 
     In detail, the light blocking sheet  221  can be used to block the non-imaging light and adjust the clear aperture. Further, the light blocking sheet  221  can be manufactured via the stamping process. The residual stress is possibly acted on the light blocking sheet  221  after the stamping process, and the light blocking sheet  221  may be deformed by the residual stress. The imaging quality would be influenced by the deformation of the light blocking sheet  221 . Especially, when the through hole of the light blocking sheet  221  is deformed or shifted, the occurrence of unexpected stray light may take place. Hence, the resistant to the deformation along the optical axis X of the light blocking sheet  221  can be provided by the basin structures  235  of the light blocking sheet  221 , and the deformation and the displacement of the through hole can be reduced. Therefore, the imaging quality can be maintained, the imaging quality is hardly changed over time, and the foreign factors, which influence the light blocking sheet  221 , can be further resisted. In particular, the foreign factors are the impact caused by falling, the temperature variation, the humidity variation or the high temperature and high humidity environment, but the present disclosure is not limited thereto. 
     In  FIG. 2B , the first surface  232  of the light blocking sheet  221  faces towards an object side of the imaging lens assembly  200 , the second surface  233  of the light blocking sheet  221  faces towards an image side of the imaging lens assembly  200 , the light blocking sheet  221  is interposed between the lens elements  211 ,  212 , and the interposing position is farther from the optical axis X than the basin structures  235  from the optical axis X. 
     In  FIGS. 2C to 2E , the shape of the light blocking sheet  221  is oblong, and the first surface  232  can include two arc-shaped surfaces  236  and two connecting surfaces  237 , wherein the arc-shaped surfaces  236  are relatively disposed, and each of the connecting surfaces  237  is connected to two sides of the arc-shaped surfaces  236 . Furthermore, the basin structures  235  can be disposed on the arc-shaped surfaces  236 . 
     In  FIGS. 2D and 2E , the basin structures  235  are arranged in interval and around the optical axis X, each of the basin structures  235  is caved in from the first surface  232  to the second surface  233 , and each of the basin structures  235  protrudes on the second surface  233  to form a concave surface  235   a . In detail, the shape of each of the concave surfaces  235   a  is oblong, wherein each of the concave surfaces  235   a  has two parallel line segments  235   b  and two semi arcs  235   c , the parallel line segments  235   b  extend towards a direction away from the optical axis X and are parallel to each other, and the semi arcs  235   c  are connected to two sides of the parallel line segments  235   b  away from the optical axis X and the other two sides of the parallel line segments  235   b  close to the optical axis X, respectively. 
       FIG. 2G  is a coating schematic view of the light blocking sheet  221  according to the 2nd example in  FIG. 2F . In  FIG. 2G , the light blocking sheet  221  can be made of a plastic material, and the light blocking sheet  221  further includes a coating layer C formed on at least one of the first surface  232  and the second surface  233 . In particular, the plastic material can be PA, PE, PET, PI, PMMA or PP. According to the 2nd example, the light blocking sheet  221  is an opaque plastic flake P 2 , the light blocking sheet  221  is dark, and an object side of the opaque plastic flake P 2  is coated via the coating layer C. That is, the coating layer C is formed on the first surface  232  of the light blocking sheet  221 . By the coating layer C, the transmittance of the light blocking sheet  221  can be lowered, the reflectivity of the light blocking sheet  221  can be lowered, the color of the light blocking sheet  221  can be changed, the invisible light can be absorbed, and one of or multiple of the aforementioned effects can be obtained, the present disclosure is not limited thereto. In  FIG. 2G , it should be mentioned that a thickness ratio of the coating layer C to the opaque plastic flake P 2  is not illustrated according to the real ratio in order to clearly indicate the composition of the light blocking sheet  221 . 
       FIG. 2H  is a schematic view of parameters of the light blocking sheet  221  according to the 2nd example in  FIG. 2A . In  FIGS. 2B and 2H , when on a direction passing through each of the basin structures  235  and vertical to the optical axis X, a nearest distance between each of the basin structures  235  and the optical axis X is Dn, a farthest distance between each of the basin structures  235  and the optical axis X is Df, a distance between the through hole surface  231  and the optical axis X is r, and a distance between the peripheral surface  234  and the optical axis X is R; a focal length of the imaging lens assembly  200  is f; a minimum spacing angle between two adjacent of the basin structures  235  on the first surface  232  (that is, on the same arc-shaped surfaces  236 ) centered on the optical axis X is θ 1 , a minimum spacing angle between two adjacent of the basin structures  235  on the first surface  232  (that is, on the different arc-shaped surfaces  236 ) centered on the optical axis X is θ 2 , and a total of all of the minimum spacing angles (that is, a total of the minimum spacing angles θ 1  and the minimum spacing angles θ 2 ) is sum(θ), an area of the concave surface  235   a  is A, and a ratio between a total of the areas of the concave surfaces  235   a  of the basin structures  235  and an area of the first surface  232  is ratio(A); on the first surface  232 , a depth of each of the basin structures  235  on the optical axis X is H; a distance between the first surface  232  and the second surface  233  of the light blocking sheet  221  on the optical axis X is T; a number of the basin structures  235  is N, the following conditions of the Table 2 are satisfied. 
     
       
         
           
               
             
               
                 TABLE 2 
               
               
                   
               
               
                 2nd example 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 r (mm) 
                 2.8 
                 f/2r 
                 5.036 
               
               
                   
                 R (mm) 
                 4.31 
                 H (mm) 
                 0.023 
               
               
                   
                 Df (mm) 
                 4.0 
                 H/T 
                 0.82 
               
               
                   
                 Dn (mm) 
                 3.0 
                 N 
                 6 
               
               
                   
                 (Df-Dn)/(R-r) 
                 0.66 
                 θ1 (degrees) 
                 26.7 
               
               
                   
                 Dn/r 
                 1.071 
                 θ2 (degrees) 
                 116.7 
               
               
                   
                 Df/R 
                 0.928 
                 sum(θ) (degrees) 
                 340.2 
               
               
                   
                 Dn-r (mm) 
                 0.2 
                 A (mm 2 ) 
                 0.0899 
               
               
                   
                 R-Df (mm) 
                 0.31 
                 ratio(A) (%) 
                 6.20 
               
               
                   
                 r/R 
                 0.65 
                   
                   
               
               
                   
                   
               
            
           
         
       
     
     3rd Example 
       FIG. 3A  is a schematic view of an imaging lens assembly  300  according to the 3rd example of the present disclosure. In  FIG. 3A , the imaging lens assembly  300  has an optical axis X, and includes a plurality of optical elements and a lens barrel  340 . It should be mentioned that the imaging lens assembly  300  can further include a plurality of lens barrels, each of the lens barrels includes at least one optical element, and the optical elements are arranged along the optical axis X, but the present disclosure is not limited thereto. 
     Furthermore, the optical elements can be a lens element, a flat lens element, a light blocking sheet, a spacer, a retainer or a light-folding element, wherein the imaging lens assembly  300  can focus, the light path can be adjusted or the imaging quality can be improved by the aforementioned optical elements, and the lens barrel  340  can accommodate the optical elements. According to the 3rd example, the imaging lens assembly  300 , in order from an object side to an image side, includes a lens element  311 , a light blocking sheet  321 , a lens element  312 , a light blocking sheet  322 , a lens element  313 , a light blocking sheet  323 , a lens element  314 , a spacer  324 , a light blocking sheet  325 , a lens element  315  and a retainer  326 . Further, numbers, structures, surface shapes and so on of the optical elements can be disposed according to different imaging demand, other optical elements can be disposed on demands, and the present disclosure is not limited thereto. 
       FIG. 3B  is a partial enlarged view of the imaging lens assembly  300  according to the 3rd example in  FIG. 3A .  FIG. 3C  is a schematic view of the light blocking sheet  321  according to the 3rd example in  FIG. 3A .  FIG. 3D  is another schematic view of the light blocking sheet  321  according to the 3rd example in  FIG. 3A .  FIG. 3E  is a partial cross-sectional view of the light blocking sheet  321  according to the 3rd example in  FIG. 3A . In  FIGS. 3B to 3E , the light blocking sheet  321  includes a through hole surface  331 , a first surface  332 , a second surface  333 , a peripheral surface  334 , a plurality of basin structures  335  and a plurality of reverse basin structures  338 , and each of the basin structures  335  and each of the reverse basin structures  338  can be seen a U-shaped structure from a cross-section parallel to the optical axis X. The through hole surface  331  surrounds the optical axis X to form an aperture stop of the imaging lens assembly  300 . In particular, a through hole is formed by the through hole surface  331  surrounding the optical axis X, and the through hole can be the aperture stop of the imaging lens assembly  300 . The first surface  332  is connected to and surrounds the through hole surface  331 . The second surface  333  is connected to and surrounds the through hole surface  331 , and the first surface  332  and the second surface  333  are relatively disposed. The peripheral surface  334  is connected to the first surface  332  and the second surface  333 , and the peripheral surface  334  is farther from the optical axis X than the through hole surface  331  from the optical axis X. 
     In detail, the light blocking sheet  321  can be used to block the non-imaging light and adjust the clear aperture. Further, the light blocking sheet  321  can be manufactured via the stamping process. The residual stress is possibly acted on the light blocking sheet  321  after the stamping process, and the light blocking sheet  321  may be deformed by the residual stress. The imaging quality would be influenced by the deformation of the light blocking sheet  321 . Especially, when the through hole of the light blocking sheet  321  is deformed or shifted, the occurrence of unexpected stray light may take place. Hence, the resistant to the deformation along the optical axis X of the light blocking sheet  321  can be provided by the basin structures  335  and the reverse basin structures  338  of the light blocking sheet  321 , and the deformation and the displacement of the through hole can be reduced. Therefore, the imaging quality can be maintained, the imaging quality is hardly changed over time, and the foreign factors, which influence the light blocking sheet  321 , can be further resisted. In particular, the foreign factors are the impact caused by falling, the temperature variation, the humidity variation or the high temperature and high humidity environment, but the present disclosure is not limited thereto. 
     In  FIG. 3B , the first surface  332  of the light blocking sheet  321  faces towards an image side of the imaging lens assembly  300 , the second surface  333  of the light blocking sheet  321  faces towards an object side of the imaging lens assembly  300 , the light blocking sheet  321  is interposed between the lens elements  311 ,  312 , and the interposing position is farther from the optical axis X than the basin structures  335  and the reverse basin structures  338  from the optical axis X. 
     In  FIGS. 3C and 3D , the basin structures  335  are arranged in interval and around the optical axis X, each of the basin structures  335  is caved in from the first surface  332  to the second surface  333 , and each of the basin structures  335  protrudes on the second surface  333  to form a concave surface  335   a ; each of the reverse basin structures  338  is arranged in interval and around the optical axis X, and each of the reverse basin structures  338  is caved in from the second surface  333  to the first surface  332 , and each of the reverse basin structures  338  protrudes on the first surface  332  to form a convex surface  338   a . The displacement of the through hole along the optical axis X can be further resisted by the cooperation between the basin structures  335  and the reverse basin structures  338 . 
     Each of the basin structures  335  can extend towards a direction away from the optical axis X, the basin structures  335  and the reverse basin structures  338  are arranged along the direction away from the optical axis X, and the basin structures  335  are further connected to the reverse basin structures  338 , wherein each of the reverse basin structures  338  is farther from the optical axis X than each of the basin structures  335  from the optical axis X, and both of a number of the basin structures  335  and a number of the reverse basin structures  338  are six. 
     In detail, each of the concave surfaces  335   a  has two parallel line segments  335   b , an arc line  335   c  and a straight-line segment  335   d , wherein the parallel line segments  335   b  extend towards the direction away from the optical axis X, the arc line  335   c  is connected to one side of each of the parallel line segments  335   b  close to the optical axis X, the straight-line segment  335   d  is connected to the other end of each of the parallel line segments  335   b  away from the optical axis X; each of the reverse basin structures  338  has two parallel line segments  338   b , an arc line  338   c  and a straight-line segment  338   d , wherein the parallel line segments  338   b  extend towards the direction away from the optical axis X, the arc line  338   c  is connected to one side of each of the parallel line segments  338   b  away from the optical axis X, the straight-line segment  338   d  is connected to the other end of each of the parallel line segments  338   b  close to the optical axis X 
       FIG. 3F  is a coating schematic view of the light blocking sheet  321  according to the 3rd example in  FIG. 3A . In  FIG. 3F , the light blocking sheet  321  can be made of a plastic material, and the light blocking sheet  321  further includes a coating layer C formed on at least one of the first surface  332  and the second surface  333 . In particular, the plastic material can be PA, PE, PET, PI, PMMA or PP. According to the 3rd example, the light blocking sheet  321  is a transparent plastic flake P 1 , both sides (that is, an object side and an image side) of the transparent plastic flake P 1  are coated via the coating layer C. That is, the coating layer C is formed on the first surface  332  and the second surface  333 . By the coating layer C, the transmittance of the light blocking sheet  321  can be lowered, the reflectivity of the light blocking sheet  321  can be lowered, the color of the light blocking sheet  321  can be changed, the invisible light can be absorbed, and one of or multiple of the aforementioned effects can be obtained, but the present disclosure is not limited thereto. In  FIG. 3F , it should be mentioned that a thickness ratio of the coating layer C to the transparent plastic flake P 1  is not illustrated according to the real ratio in order to clearly indicate the composition of the light blocking sheet  321 . 
       FIG. 3G  is a schematic view of parameters of the light blocking sheet  321  according to the 3rd example in  FIG. 3A . In  FIGS. 3B and 3G , when on a direction passing through each of the basin structures  335  and vertical to the optical axis X, a nearest distance between each of the basin structures  335  and the optical axis X is Dn, a farthest distance between each of the basin structures  335  and the optical axis X is Df, a distance between the through hole surface  331  and the optical axis X is r, and a distance between the peripheral surface  334  and the optical axis X is R; a nearest distance between each of the reverse basin structures  338  and the optical axis X is Dn′, a farthest distance between each of the reverse basin structures  338  and the optical axis X is Df′; a focal length of the imaging lens assembly  300  is f; a minimum spacing angle between two adjacent of the basin structures  335  on the first surface  332  centered on the optical axis X is θ, each of the minimum spacing angles of each two adjacent of the basin structures  335  is the same, and a total of all of the minimum spacing angles is sum(θ), an area of the concave surface  335   a  is A, and a ratio between a total of the areas of the concave surfaces  335   a  of the basin structures  335  and an area of the first surface  332  is ratio(A); on the first surface  332 , a depth of each of the basin structures  335  on the optical axis X is H; on the first surface  332 , a depth of each of the reverse basin structures  338  on the optical axis X is H′; a distance between the first surface  332  and the second surface  333  of the light blocking sheet  321  on the optical axis X is T; a number of the basin structures  335  is N; a number of the reverse basin structures  338  is N′, the following conditions of the Table 3 are satisfied. 
     
       
         
           
               
             
               
                 TABLE 3 
               
               
                   
               
               
                 3rd example 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 r (mm) 
                 0.485 
                 Dn′ (mm) 
                 1.1625 
               
               
                   
                 R (mm) 
                 1.875 
                 (Df-Dn′)/(R-r) 
                 0.33 
               
               
                   
                 Df (mm) 
                 1.1625 
                 H (mm) 
                 0.01 
               
               
                   
                 Dn (mm) 
                 0.7 
                 H/T 
                 0.56 
               
               
                   
                 (Df-Dn)/(R-r) 
                 0.33 
                 H′ (mm) 
                 0.01 
               
               
                   
                 Dn/r 
                 1.443 
                 N 
                 6 
               
               
                   
                 Df/R 
                 0.62 
                 N′ 
                 6 
               
               
                   
                 Dn-r (mm) 
                 0.215 
                 θ (degrees) 
                 34.3 
               
               
                   
                 R-Df (mm) 
                 0.7125 
                 sum(θ) (degrees) 
                 205.8 
               
               
                   
                 r/R 
                 0.259 
                 A (mm 2 ) 
                 0.1382 
               
               
                   
                 f/2r 
                 2.103 
                 ratio(A) (%) 
                 8.05 
               
               
                   
                 Df′ (mm) 
                 1.625 
                   
                   
               
               
                   
                   
               
            
           
         
       
     
     4th Example 
       FIG. 4A  is a schematic view of an imaging lens assembly  400  according to the 4th example of the present disclosure. In  FIG. 4A , the imaging lens assembly  400  has an optical axis X, and includes a plurality of optical elements and a lens barrel  440 . It should be mentioned that the imaging lens assembly  400  can further include a plurality of lens barrels, each of the lens barrels includes at least one optical element, and the optical elements are arranged along the optical axis X, but the present disclosure is not limited thereto. 
     Furthermore, the optical elements can be a lens element, a flat lens element, a light blocking sheet, a spacer, a retainer or a light-folding element, wherein the imaging lens assembly  400  can focus, the light path can be adjusted or the imaging quality can be improved by the aforementioned optical elements, and the lens barrel  440  can accommodate the optical elements. According to the 4th example, the imaging lens assembly  400 , in order from an object side to an image side, includes a lens element  411 , a light blocking sheet  421 , a lens element  412 , a light blocking sheet  422 , a lens element  413 , a light blocking sheet  423 , a lens element  414 , a light blocking sheet  424 , a lens element  415  and a retainer  425 . Further, numbers, structures, surface shapes and so on of the optical elements can be disposed according to different imaging demand, other optical elements can be disposed on demands, and the present disclosure is not limited thereto. 
       FIG. 4B  is a partial enlarged view of the imaging lens assembly  400  according to the 4th example in  FIG. 4A .  FIG. 4C  is a schematic view of the light blocking sheet  421  according to the 4th example in  FIG. 4A .  FIG. 4D  is another schematic view of the light blocking sheet  421  according to the 4th example in  FIG. 4A . In  FIGS. 4B to 4D , the light blocking sheet  421  includes a through hole surface  431 , a first surface  432 , a second surface  433 , a peripheral surface  434  and a plurality of basin structures  435 . The through hole surface  431  surrounds the optical axis X to form an aperture stop of the imaging lens assembly  400 . In particular, a through hole is formed by the through hole surface  431  surrounding the optical axis X, and the through hole can be the aperture stop of the imaging lens assembly  400 . The first surface  432  is connected to and surrounds the through hole surface  431 . The second surface  433  is connected to and surrounds the through hole surface  431 , and the first surface  432  and the second surface  433  are relatively disposed. The peripheral surface  434  is connected to the first surface  432  and the second surface  433 , and the peripheral surface  434  is farther from the optical axis X than the through hole surface  431  from the optical axis X. 
     In detail, the light blocking sheet  421  can be used to block the non-imaging light and adjust the clear aperture. Further, the light blocking sheet  421  can be manufactured via the stamping process. The residual stress is possibly acted on the light blocking sheet  421  after the stamping process, and the light blocking sheet  421  may be deformed by the residual stress. The imaging quality would be influenced by the deformation of the light blocking sheet  421 . Especially, when the through hole of the light blocking sheet  421  is deformed or shifted, the occurrence of unexpected stray light may take place. Hence, the resistant to the deformation along the optical axis X of the light blocking sheet  421  can be provided by the basin structures  435  of the light blocking sheet  421 , and the deformation and the displacement of the through hole can be reduced. Therefore, the imaging quality can be maintained, the imaging quality is hardly changed over time, and the foreign factors, which influence the light blocking sheet  421 , can be further resisted. In particular, the foreign factors are the impact caused by falling, the temperature variation, the humidity variation or the high temperature and high humidity environment, but the present disclosure is not limited thereto. 
     In  FIGS. 4A and 4B , the first surface  432  of the light blocking sheet  421  faces towards an object side of the imaging lens assembly  400 , the second surface  433  of the light blocking sheet  421  faces towards an image side of the imaging lens assembly  400 , the light blocking sheet  421  is interposed between the lens elements  411 ,  412 , and the interposing position is farther from the optical axis X than the basin structures  435  from the optical axis X. Moreover, the peripheral surface  434  of the light blocking sheet  421  is directly contacted with the lens barrel  440 . 
     In  FIGS. 4C and 4D , the basin structures  435  are arranged in interval and around the optical axis X, each of the basin structures  435  is caved in from the first surface  432  to the second surface  433 , and each of the basin structures  435  protrudes on the second surface  433  to form a concave surface  435   a . In detail, each of the concave surfaces  435   a  has two parallel line segments  435   b  and an arc line  435   c , the parallel line segments  435   b  extend and gradually expand towards a direction away from the optical axis X, a side, which is away from the optical axis X, of each of the parallel line segments  435   b  is connected to the arc line  435   c , and a closed shape is formed by the other end, which is close to the optical axis X, of the each of the parallel line segments  435   b  connected to a fillet (its reference numeral is omitted). Hence, each of the basin structures  435  extends and gradually expands towards the direction away from the optical axis X. Further, the fillet can be further disposed on each of the connecting portions between each of the parallel line segments  435   b  and the arc line  435   c.    
       FIG. 4E  is a schematic view of parameters of the light blocking sheet  421  according to the 4th example in  FIG. 4A . In  FIGS. 4B and 4E , when on a direction passing through each of the basin structures  435  and vertical to the optical axis X, a nearest distance between each of the basin structures  435  and the optical axis X is Dn, a farthest distance between each of the basin structures  435  and the optical axis X is Df, a distance between the through hole surface  431  and the optical axis X is r, and a distance between the peripheral surface  434  and the optical axis X is R; a focal length of the imaging lens assembly  400  is f; a minimum spacing angle between two adjacent of the basin structures  435  on the first surface  432  centered on the optical axis X is θ, each of the minimum spacing angles of each two adjacent of the basin structures  435  is the same, and a total of all of the minimum spacing angles is sum(θ); an area of the concave surface  435   a  is A, and a ratio between a total of the areas of the concave surfaces  435   a  of the basin structures  435  and an area of the first surface  432  is ratio(A); on the first surface  432 , a depth of each of the basin structures  435  on the optical axis X is H; a distance between the first surface  432  and the second surface  433  of the light blocking sheet  421  on the optical axis X is T; a number of the basin structures  435  is N, the following conditions of the Table 4 are satisfied. 
     
       
         
           
               
             
               
                 TABLE 4 
               
               
                   
               
               
                 4th example 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 r (mm) 
                 0.425 
                 r/R 
                 0.193 
               
               
                   
                 R (mm) 
                 2.2 
                 f/2r 
                 1.824 
               
               
                   
                 Df (mm) 
                 1.7055 
                 H (mm) 
                 0.015 
               
               
                   
                 Dn (mm) 
                 0.6945 
                 H/T 
                 0.50 
               
               
                   
                 (Df-Dn)/(R-r) 
                 0.57 
                 N 
                 16 
               
               
                   
                 Dn/r 
                 1.634 
                 θ (degrees) 
                 13.1 
               
               
                   
                 Df/R 
                 0.775 
                 sum(θ) (degrees) 
                 209.6 
               
               
                   
                 Dn-r (mm) 
                 0.2695 
                 A (mm 2 ) 
                 0.1228 
               
               
                   
                 R-Df (mm) 
                 0.4945 
                 ratio(A) (%) 
                 13.42 
               
               
                   
                   
               
            
           
         
       
     
     5th Example 
       FIG. 5A  is a schematic view of an imaging lens assembly  500  according to the 5th example of the present disclosure. In  FIG. 5A , the imaging lens assembly  500  has an optical axis X, and includes a plurality of optical elements and a lens barrel  540 . It should be mentioned that the imaging lens assembly  500  can further include a plurality of lens barrels, each of the lens barrels includes at least one optical element, and the optical elements are arranged along the optical axis X, but the present disclosure is not limited thereto. 
     Furthermore, the optical elements can be a lens element, a flat lens element, a light blocking sheet, a spacer, a retainer or a light-folding element, wherein the imaging lens assembly  500  can focus, the light path can be adjusted or the imaging quality can be improved by the aforementioned optical elements, and the lens barrel  540  can accommodate the optical elements. According to the 5th example, the imaging lens assembly  500 , in order from an object side to an image side, includes a retainer  521 , a lens element  511 , a light blocking sheet  522 , a lens element  512 , a light blocking sheet  523  and a lens element  513 . Further, numbers, structures, surface shapes and so on of the optical elements can be disposed according to different imaging demand, other optical elements can be disposed on demands, and the present disclosure is not limited thereto. 
       FIG. 5B  is a partial enlarged view of the imaging lens assembly  500  according to the 5th example in  FIG. 5A .  FIG. 5C  is another partial enlarged view of the imaging lens assembly  500  according to the 5th example in  FIG. 5A .  FIG. 5D  is a schematic view of the light blocking sheet  522  according to the 5th example in  FIG. 5A .  FIG. 5E  is another schematic view of the light blocking sheet  522  according to the 5th example in  FIG. 5A . In  FIGS. 5B to 5E , the light blocking sheet  522  includes a through hole surface  531 , a first surface  532 , a second surface  533 , a peripheral surface  534 , a plurality of first basin structures  551  and a plurality of second basin structures  553 . The through hole surface  531  surrounds the optical axis X to form an aperture stop of the imaging lens assembly  500 . In particular, a through hole is formed by the through hole surface  531  surrounding the optical axis X, and the through hole can be the aperture stop of the imaging lens assembly  500 . The first surface  532  is connected to and surrounds the through hole surface  531 . The second surface  533  is connected to and surrounds the through hole surface  531 , and the first surface  532  and the second surface  533  are relatively disposed. The peripheral surface  534  is connected to the first surface  532  and the second surface  533 , and the peripheral surface  534  is farther from the optical axis X than the through hole surface  531  from the optical axis X. 
     In detail, the light blocking sheet  522  can be used to block the non-imaging light and adjust the clear aperture. Further, the light blocking sheet  522  can be manufactured via the stamping process. The residual stress is possibly acted on the light blocking sheet  522  after the stamping process, and the light blocking sheet  522  may be deformed by the residual stress. The imaging quality would be influenced by the deformation of the light blocking sheet  522 . Especially, when the through hole of the light blocking sheet  522  is deformed or shifted, the occurrence of unexpected stray light may take place. Hence, the resistant to the deformation along the optical axis X of the light blocking sheet  522  can be provided by the first basin structures  551  and the second basin structures  553  of the light blocking sheet  522 , and the deformation and the displacement of the through hole can be reduced. Therefore, the imaging quality can be maintained, the imaging quality is hardly changed over time, and the foreign factors, which influence the light blocking sheet  522 , can be further resisted. In particular, the foreign factors are the impact caused by falling, the temperature variation, the humidity variation or the high temperature and high humidity environment, but the present disclosure is not limited thereto. 
     In  FIGS. 5B and 5C , the first surface  532  of the light blocking sheet  522  faces towards an image side of the imaging lens assembly  500 , the second surface  533  of the light blocking sheet  522  faces towards an object side of the imaging lens assembly  500 , the light blocking sheet  522  is interposed between the lens elements  511 ,  512 , and the interposing position is farther from the optical axis X than the first basin structures  551  and the second basin structures  553  from the optical axis X. 
     In  FIGS. 5D and 5E , the first basin structures  551  and the second basin structures  553  are arranged in interval and around the optical axis X, and the first basin structures  551  and the second basin structures  553  are adjacently arranged on a circumferential direction centered on the optical axis X. A length of each of the second basin structures  553  at a radiation direction centered on the optical axis X is longer than a length of each of the first basin structures  551  at the radiation direction centered on the optical axis X, and the second basin structures  553  is closer to the through hole surface  531  than the first basin structures  551  to the through hole surface  531 . 
     Each of the first basin structures  551  is caved in from the first surface  532  to the second surface  533 , and each of the first basin structures  551  protrudes on the second surface  533  to form a first concave surface  552 . Each of the second basin structures  553  is caved in from the first surface  532  to the second surface  533 , and each of the second basin structures  553  protrudes on the second surface  533  to form a second concave surface  554 . In detail, the shape of each of the first concave surfaces  552  is oblong, wherein each of the first concave surfaces  552  has two parallel line segments  552   a  and two semi arcs  552   b , the parallel line segments  552   a  extend towards a direction away from the optical axis X and are parallel to each other, and the semi arcs  552   b  are connected to two sides of the parallel line segments  552   a  away from the optical axis X and the other two sides of the parallel line segments  552   a  close to the optical axis X, respectively; the shape of each the second concave surfaces  554  is bullet-shaped, wherein each of the second concave surfaces  554  has two parallel line segments  554   a , two straight-line segments  554   b , an arc  554   c  and a fillet  554   d , the parallel line segments  554   a  extend towards the direction away from the optical axis X and are parallel to each other, the straight-line segments  554   b  extend and gradually expand towards the direction away from the optical axis X, the arc  554   c  is connected to a side of each of the parallel line segments  554   a  away from the optical axis X, and the fillet  554   d  is connected to a side of each of straight-line segments  554   b  close to the optical axis X. 
       FIG. 5F  is a schematic view of parameters of the light blocking sheet  522  according to the 5th example in  FIG. 5A . In  FIGS. 5B, 5C and 5F , when on a direction passing through each of the first basin structures  551  and vertical to the optical axis X, a nearest distance between each of the first basin structures  551  and the optical axis X is Dn 1 , a farthest distance between each of the first basin structures  551  and the optical axis X is Df 1 , a distance between the through hole surface  531  and the optical axis X is r, and a distance between the peripheral surface  534  and the optical axis X is R; a nearest distance between each of the second basin structures  553  and the optical axis X is Dn 2 , a farthest distance between each of the second basin structures  553  and the optical axis X is Df 2 ; a focal length of the imaging lens assembly  500  is f; a minimum spacing angle between two adjacent of the basin structures (according to the 5th example, the basin structures are the first basin structures  551  and the second basin structures  553 ) on the first surface  532  centered on the optical axis X is θ, each of the minimum spacing angles of each adjacent of the first basin structures  551  and the second basin structures  553  is the same, and a total of all of the minimum spacing angles is sum(θ), an area of the first concave surfaces  552  is A 1 , an area of the second concave surfaces  554  is A 2 , and a ratio between a total of the areas of the concave surfaces of the basin structures (according to the 5th example, the total of the areas of the concave surfaces is the total of the area of the first concave surfaces  552  of the first basin structures  551  and the total of the second concave surfaces  554  of the second basin structures  553 ) and an area of the first surface  532  is ratio(A); on the first surface  532 , a depth of each of the first basin structures  551  on the optical axis X is H 1 , and a depth of each of the second basin structures  553  on the optical axis X is H 2 ; a distance between the first surface  532  and the second surface  533  of the light blocking sheet  522  on the optical axis X is T; a number of the first basin structures  551  is N 1 , and a number of the second basin structures  553  is N 2 , the following conditions of the Table 5 are satisfied. 
     
       
         
           
               
             
               
                 TABLE 5 
               
               
                   
               
               
                 5th example 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 r (mm) 
                 0.215 
                 Dn2 (mm) 
                 0.265 
               
               
                   
                 R (mm) 
                 1.0 
                 (Df2-Dn2)/(R-r) 
                 0.73 
               
               
                   
                 Df1 (mm) 
                 0.835 
                 H1 (mm) 
                 0.03 
               
               
                   
                 Dn1 (mm) 
                 0.415 
                 H1/T 
                 1.50 
               
               
                   
                 (Df1-Dn1)/(R-r) 
                 0.54 
                 H2 (mm) 
                 0.03 
               
               
                   
                 Dn1/r 
                 1.930 
                 N1 
                 3 
               
               
                   
                 Df1/R 
                 0.835 
                 N2 
                 3 
               
               
                   
                 Dn1-r (mm) 
                 0.2 
                 θ (degrees) 
                 31.8 
               
               
                   
                 R-Df1 (mm) 
                 0.165 
                 sum(θ) (degrees) 
                 190.8 
               
               
                   
                 r/R 
                 0.215 
                 A1 (mm 2 ) 
                 0.0598 
               
               
                   
                 f/2r 
                 0.791 
                 A2 (mm 2 ) 
                 0.0808 
               
               
                   
                 Df2 (mm) 
                 0.835 
                 ratio(A) (%) 
                 14.08 
               
               
                   
                   
               
            
           
         
       
     
     6th Example 
       FIG. 6A  is a schematic view of an imaging lens assembly  600  according to the 6th example of the present disclosure. In  FIG. 6A , the imaging lens assembly  600  has an optical axis X, and includes a plurality of optical elements and a lens barrel  640 . It should be mentioned that the imaging lens assembly  600  can further include a plurality of lens barrels, each of the lens barrels includes at least one optical element, and the optical element is arranged along the optical axis X, but the present disclosure is not limited thereto. 
     Furthermore, the optical element can be a lens element, a flat lens element, a light blocking sheet, a spacer, a retainer or a light-folding element, wherein the imaging lens assembly  600  can focus, the light path can be adjusted or the imaging quality can be improved by the aforementioned optical elements, and the lens barrel  640  can accommodate the optical elements. According to the 6th example, the imaging lens assembly  600 , in order from an object side to an image side, includes a lens element  611 , a lens element  612 , a light blocking sheet  621 , a lens element  613 , a light blocking sheet  622 , a lens element  614 , a light blocking sheet  623 , a lens element  615 , a spacer  624 , a lens element  616 , a spacer  625 , a light blocking sheet  626 , a lens element  617  and a retainer  627 . Further, numbers, structures, surface shapes and so on of the optical elements can be disposed according to different imaging demand, other optical elements can be disposed on demands, and the present disclosure is not limited thereto. 
       FIG. 6B  is a partial enlarged view of the imaging lens assembly  600  according to the 6th example in  FIG. 6A .  FIG. 6C  is a schematic view of the light blocking sheet  623  according to the 6th example in  FIG. 6A .  FIG. 6D  is another schematic view of the light blocking sheet  623  according to the 6th example in  FIG. 6A . In  FIGS. 6B to 6D , the light blocking sheet  623  includes a through hole surface  631 , a first surface  632 , a second surface  633 , a peripheral surface  634  and a plurality of basin structures  635 . The through hole surface  631  surrounds the optical axis X to form an aperture stop of the imaging lens assembly  600 . In particular, a through hole is formed by the through hole surface  631  surrounding the optical axis X, and the through hole can be the aperture stop of the imaging lens assembly  600 . The first surface  632  is connected to and surrounds the through hole surface  631 . The second surface  633  is connected to and surrounds the through hole surface  631 , and the first surface  632  and the second surface  633  are relatively disposed. The peripheral surface  634  is connected to the first surface  632  and the second surface  633 , and the peripheral surface  634  is farther from the optical axis X than the through hole surface  631  from the optical axis X. 
     In detail, the light blocking sheet  623  can be used to block the non-imaging light and adjust the clear aperture. Further, the light blocking sheet  623  can be manufactured via the stamping process. The residual stress is possibly acted on the light blocking sheet  623  after the stamping process, and the light blocking sheet  623  may be deformed by the residual stress. The imaging quality would be influenced by the deformation of the light blocking sheet  623 . Especially, when the through hole of the light blocking sheet  623  is deformed or shifted, the occurrence of unexpected stray light may take place. Hence, the resistant to the deformation along the optical axis X of the light blocking sheet  623  can be provided by the basin structures  635  of the light blocking sheet  623 , and the deformation and the displacement of the through hole can be reduced. Therefore, the imaging quality can be maintained, the imaging quality is hardly changed over time, and the foreign factors, which influence the light blocking sheet  623 , can be further resisted. In particular, the foreign factors are the impact caused by falling, the temperature variation, the humidity variation or the high temperature and high humidity environment, but the present disclosure is not limited thereto. 
     In  FIG. 6B , the first surface  632  of the light blocking sheet  623  faces towards an image side of the imaging lens assembly  600 , the second surface  633  of the light blocking sheet  623  faces towards an object side of the imaging lens assembly  600 , the light blocking sheet  623  is interposed between the lens elements  614 ,  615 , and the interposing position is closer to the optical axis X than the basin structures  635  to the optical axis X. In particular, the peripheral surface  634  of the light blocking sheet  623  is directly contacted with the lens barrel  640 , and the basin structure  635  can further face towards the lens barrel  640  of the imaging lens assembly  600 . 
     In  FIGS. 6C and 6D , the basin structures  635  extend and gradually expand towards a direction away from the optical axis X, and the basin structures  635  are arranged in interval and around the optical axis X. Each of the basin structures  635  is caved in from the first surface  632  to the second surface  633 , and each of the basin structures  635  protrudes on the second surface  633  to form a concave surface  635   a . In detail, each of the concave surfaces  635   a  has two straight-line segments  635   b  and two arc lines  635   c , wherein the straight-line segments  635   b  gradually expand towards the direction away from the optical axis X, each of the straight-line segments  635   b  is connected to two sides of the arc lines  635   c , each of the arc lines  635   c  has different radii centered on the optical axis X, and a closed shape is formed by the straight-line segments  635   b  and the arc lines  635   c . Furthermore, fillets can be disposed on the connections between the straight-line segments  635   b  and the arc lines  635   c.    
       FIG. 6E  is a schematic view of parameters of the light blocking sheet  623  according to the 6th example in  FIG. 6A . In  FIGS. 6B and 6E , when on a direction passing through each of the basin structures  635  and vertical to the optical axis X, a nearest distance between each of the basin structures  635  and the optical axis X is Dn, a farthest distance between each of the basin structures  635  and the optical axis X is Df, a distance between the through hole surface  631  and the optical axis X is r, and a distance between the peripheral surface  634  and the optical axis X is R; a focal length of the imaging lens assembly  600  is f; a minimum spacing angle between two adjacent of the basin structures  635  on the first surface  632  centered on the optical axis X is θ, each of the minimum spacing angles of each two adjacent of the basin structures  635  is the same, and a total of all of the minimum spacing angles is sum(θ), an area of the concave surface  635   a  is A, and a ratio between a total of the areas of the concave surfaces  635   a  of the basin structures  635  and an area of the first surface  632  is ratio(A); on the first surface  632 , a depth of each of the basin structures  635  on the optical axis X is H; a distance between the first surface  632  and the second surface  633  of the light blocking sheet  623  on the optical axis X is T; a number of the basin structures  635  is N, the following conditions of the Table 6 are satisfied. 
     
       
         
           
               
             
               
                 TABLE 6 
               
               
                   
               
               
                 6th example 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 r (mm) 
                 2.49 
                 r/R 
                 0.680 
               
               
                   
                 R (mm) 
                 3.675 
                 f/2r 
                 1.367 
               
               
                   
                 Df (mm) 
                 3.575 
                 H (mm) 
                 0.04 
               
               
                   
                 Dn (mm) 
                 3.235 
                 H/T 
                 1.74 
               
               
                   
                 (Df-Dn)/(R-r) 
                 0.29 
                 N 
                 6 
               
               
                   
                 Dn/r 
                 1.299 
                 θ (degrees) 
                 40.0 
               
               
                   
                 Df/R 
                 0.973 
                 sum(θ) (degrees) 
                 240.0 
               
               
                   
                 Dn-r (mm) 
                 0.745 
                 A (mm 2 ) 
                 0.3072 
               
               
                   
                 R-Df (mm) 
                 0.1 
                 ratio(A) (%) 
                 8.03 
               
               
                   
                   
               
            
           
         
       
     
     7th Example 
       FIG. 7A  is a schematic view of an imaging lens assembly  700  according to the 7th example of the present disclosure. In  FIG. 7A , the imaging lens assembly  700  has an optical axis X, and includes a plurality of optical elements and a lens barrel  740 . It should be mentioned that the imaging lens assembly  700  can further include a plurality of lens barrels, each of the lens barrels includes at least one optical element, and the optical element is arranged along the optical axis X, but the present disclosure is not limited thereto. 
     Furthermore, the optical element can be a lens element, a flat lens element, a light blocking sheet, a spacer, a retainer or a light-folding element, wherein the imaging lens assembly  700  can focus, the light path can be adjusted or the imaging quality can be improved by the aforementioned optical elements, and the lens barrel  740  can accommodate the optical elements. According to the 7th example, the imaging lens assembly  700 , in order from an object side to an image side, includes a lens element  711 , a light blocking sheet  721 , a lens element  712 , a light blocking sheet  722 , a lens element  713 , a light blocking sheet  723 , a lens element  714 , a light blocking sheet  724 , a lens element  715 , a light blocking sheet  725 , a lens element  716 , a light blocking sheet  726 , a lens element  717  and a retainer  727 . Further, numbers, structures, surface shapes and so on of the optical elements can be disposed according to different imaging demand, other optical elements can be disposed on demands, and the present disclosure is not limited thereto. 
       FIG. 7B  is a partial enlarged view of the imaging lens assembly  700  according to the 7th example in  FIG. 7A .  FIG. 7C  is another partial enlarged view of the imaging lens assembly  700  according to the 7th example in  FIG. 7A .  FIG. 7D  is a schematic view of the light blocking sheet  721  according to the 7th example in  FIG. 7A .  FIG. 7E  is another schematic view of the light blocking sheet  721  according to the 7th example in  FIG. 7A . In  FIGS. 7B to 7E , the light blocking sheet  721  includes a through hole surface  731 , a first surface  732 , a second surface  733 , a peripheral surface  734 , a plurality of basin structures  735  and a plurality of reverse basin structures  738 . The through hole surface  731  surrounds the optical axis X to form an aperture stop of the imaging lens assembly  700 . In particular, a through hole is formed by the through hole surface  731  surrounding the optical axis X, and the through hole can be the aperture stop of the imaging lens assembly  700 . The first surface  732  is connected to and surrounds the through hole surface  731 . The second surface  733  is connected to and surrounds the through hole surface  731 , and the first surface  732  and the second surface  733  are relatively disposed. The peripheral surface  734  is connected to the first surface  732  and the second surface  733 , and the peripheral surface  734  is farther from the optical axis X than the through hole surface  731  from the optical axis X. 
     In detail, the light blocking sheet  721  can be used to block the non-imaging light and adjust the clear aperture. Further, the light blocking sheet  721  can be manufactured via the stamping process. The residual stress is possibly acted on the light blocking sheet  721  after the stamping process, and the light blocking sheet  721  may be deformed by the residual stress. The imaging quality would be influenced by the deformation of the light blocking sheet  721 . Especially, when the through hole of the light blocking sheet  721  is deformed or shifted, the occurrence of unexpected stray light may take place. Hence, the resistant to the deformation along the optical axis X of the light blocking sheet  721  can be provided by the basin structures  735  and the reverse basin structures  738  of the light blocking sheet  721 , and the deformation and the displacement of the through hole can be reduced. Therefore, the imaging quality can be maintained, the imaging quality is hardly changed over time, and the foreign factors, which influence the light blocking sheet  721 , can be further resisted. In particular, the foreign factors are the impact caused by falling, the temperature variation, the humidity variation or the high temperature and high humidity environment, but the present disclosure is not limited thereto. 
     In  FIGS. 7B and 7C , the first surface  732  of the light blocking sheet  721  faces towards an object side of the imaging lens assembly  700 , the second surface  733  of the light blocking sheet  721  faces towards an image side of the imaging lens assembly  700 , the light blocking sheet  721  is interposed between the lens elements  711 ,  712 , and the interposing position is farther from the optical axis X than the basin structures  735  and the reverse basin structures  738  from the optical axis X. 
     In  FIGS. 7D and 7E , the basin structures  735  and the reverse basin structures  738  are arranged in interval and around the optical axis X, wherein each of the basin structures  735  is caved in from the first surface  732  to the second surface  733 , and each of the basin structures  735  protrudes on the second surface  733  to form a concave surface  735   a ; each of the reverse basin structures  738  is caved in from the second surface  733  to the first surface  732 , and each of the reverse basin structures  738  protrudes on the first surface  732  to form a convex surface  738   a . The displacement of the through hole along the optical axis X can be further resisted by the cooperation between the basin structures  735  and the reverse basin structures  738 . 
     The shape of each of the concave surfaces  735   a  of the of the basin structures  735  is oval, wherein the basin structures  735  gradually expand towards the direction away from the optical axis X and then gradually shrink and seal towards the direction away from the optical axis X. Further, the shape of each of the convex surfaces  738   a  of the reverse basin structure  738  is the same as the shape of each of the concave surfaces  735   a , and both of a number of the basin structures  735  and a number of the reverse basin structures  738  are three. 
       FIG. 7F  is a schematic view of parameters of the light blocking sheet  721  according to the 7th example in  FIG. 7A . In  FIGS. 7B, 7C and 7F , when on a direction passing through each of the basin structures  735  and vertical to the optical axis X, a nearest distance between each of the basin structures  735  and the optical axis X is Dn, a farthest distance between each of the basin structures  735  and the optical axis X is Df, a distance between the through hole surface  731  and the optical axis X is r, and a distance between the peripheral surface  734  and the optical axis X is R; a nearest distance between each of the reverse basin structures  738  and the optical axis X is Dn′, a farthest distance between each of the reverse basin structures  738  and the optical axis X is Df′; a focal length of the imaging lens assembly  700  is f; a minimum spacing angle between two adjacent of the basin structures  735  on the first surface  732  centered on the optical axis X is θ, each of the minimum spacing angles of each two adjacent of the basin structures  735  is the same, and a total of all of the minimum spacing angles is sum(θ); an area of the concave surface  735   a  is A, and a ratio between a total of the areas of the concave surfaces  735   a  of the basin structures  735  and an area of the first surface  732  is ratio(A); on the first surface  732 , a depth of each of the basin structures  735  on the optical axis X is H; on the first surface  732 , a depth of each of the reverse basin structures  738  on the optical axis X is H′; a distance between the first surface  732  and the second surface  733  of the light blocking sheet  721  on the optical axis X is T; a number of the basin structures  735  is N; a number of the reverse basin structures  738  is N′, the following conditions of the Table 7 are satisfied. 
     
       
         
           
               
             
               
                 TABLE 7 
               
               
                   
               
               
                 7th example 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 r (mm) 
                 1.21 
                 Dn′ (mm) 
                 1.69 
               
               
                   
                 R (mm) 
                 2.65 
                 (Df-Dn′)/(R-r) 
                 0.33 
               
               
                   
                 Df (mm) 
                 2.17 
                 H (mm) 
                 0.03 
               
               
                   
                 Dn (mm) 
                 1.69 
                 H/T 
                 0.75 
               
               
                   
                 (Df-Dn)/(R-r) 
                 0.33 
                 H′ (mm) 
                 0.03 
               
               
                   
                 Dn/r 
                 1.397 
                 N 
                 3 
               
               
                   
                 Df/R 
                 0.819 
                 N′ 
                 3 
               
               
                   
                 Dn-r (mm) 
                 0.48 
                 θ (degrees) 
                 112.8 
               
               
                   
                 R-Df (mm) 
                 0.48 
                 sum(θ) (degrees) 
                 338.4 
               
               
                   
                 r/R 
                 0.457 
                 A (mm 2 ) 
                 0.0496 
               
               
                   
                 f/2r 
                 0.806 
                 ratio(A) (%) 
                 0.85 
               
               
                   
                 Df′ (mm) 
                 2.17 
                   
                   
               
               
                   
                   
               
            
           
         
       
     
     8th Example 
       FIG. 8A  is a schematic view of an electronic device  80  according to the 8th example of the present disclosure.  FIG. 8B  is another schematic view of the electronic device  80  according to the 8th example in  FIG. 8A . In  FIGS. 8A and 8B , the electronic device  80  is a smart phone. Further, the electronic device also can be a laptop, a tablet or a tachograph, but the present disclosure is not limited thereto. The electronic device  80  includes an image capturing apparatus (its reference numeral is omitted), an image sensor (not shown) and a imaging control interface  810 , wherein the image capturing apparatus includes an imaging lens assembly, the image sensor is corresponding to the image capturing apparatus, and the image sensor is disposed on an image surface (not shown) of the imaging lens assembly. 
     According to the 8th example, the imaging lens assembly includes ultra-wide angle image capturing apparatuses  821 ,  822 , an ultra-telephoto image capturing apparatus  823 , wide-angle image capturing apparatuses  824 ,  825 , a telephoto image capturing apparatus  826 , a time-of-flight (TOF) module  827 , a macro image capturing apparatus  828  and a biometric sensing image capturing apparatus  829 , wherein the TOF module  827  and the biometric sensing image capturing apparatus  829  can be another image capturing apparatuses with other functions, but the disposition is not limited thereto. In particular, the imaging lens assembly can be one of the imaging lens assemblies according to the aforementioned 1st example to the 7th example, but the present disclosure is not limited thereto. 
     According to the 8th example, the ultra-wide angle image capturing apparatus  821 , the wide-angle image capturing apparatus  824  and the TOF module  827  are disposed on a front of the electronic device  80 , the ultra-wide angle image capturing apparatus  822 , the ultra-telephoto image capturing apparatus  823 , the wide-angle image capturing apparatus  825 , the telephoto image capturing apparatus  826  and the macro image capturing apparatus  828  are disposed on a back of the electronic device  80 , and the biometric sensing image capturing apparatus  829  is disposed on a side of the electronic device  80 . 
     The imaging control interface  810  can be touch screen for displaying the scene and having the touch function, and the shooting angle can be manually adjusted. In detail, the imaging control interface  810  includes an image replay button  811 , an image capturing switching button  812 , a focus capturing button  813  and an integrated menu button  814 . Furthermore, users enter a shooting mode via the imaging control interface  810 , the image capturing switching button  812  is configured to switch one of the ultra-wide angle image capturing apparatuses  821 ,  822 , the ultra-telephoto image capturing apparatus  823 , the wide-angle image capturing apparatuses  824 ,  825 , the telephoto image capturing apparatus  826  and the macro image capturing apparatus  828  to capture the image, the users use the focus capturing button  813  to undergo image capturing after capturing the images and confirming one of the ultra-wide angle image capturing apparatuses  821 ,  822 , the ultra-telephoto image capturing apparatus  823 , the wide-angle image capturing apparatuses  824 ,  825 , the telephoto image capturing apparatus  826  and the macro image capturing apparatus  828 , the users can view the images by the image replay button  811  after undergoing image capturing, and the integrated menu button  814  is configured to adjust the details of the image capturing (such as timed photo, photo ratio, and etc.). 
     The electronic device  80  can further include a reminding light  83 , and the reminding light  83  is disposed on the front of the electronic device  80  and can be configured to remind the users of unread messages, missed calls and the condition of the phone. 
     Moreover, after entering the shooting mode via the imaging control interface  810  of the electronic device  80 , the imaging light is gathered on the image sensor via the imaging lens assembly, and an electronic signal about an image is output to an image signal processor (ISP)  851  of a single chip system  85 . The single chip system  85  can further include a random access memory (RAM)  852 , a central processing unit  853  and a storage unit  854 . Also, the single chip system  85  can further include, but not be limited to, a display, a control unit, a read-only memory (ROM), or the combination thereof. 
     To meet a specification of the electronic device  80 , the electronic device  80  can further include an optical anti-shake mechanism (not shown). Furthermore, the electronic device  80  can further include at least one focusing assisting module  86  and at least one sensing element (not shown). The focusing assisting module  86  can include a flash module  861  for compensating a color temperature, an infrared distance measurement component (not shown), a laser focus module (not shown), etc. The sensing element can have functions for sensing physical momentum and kinetic energy, such as an accelerator (not shown), a gyroscope  871 , a Hall Effect Element (not shown), a position locator  872 , a signal transmitter module  873 , to sense shaking or jitters applied by hands of the user or external environments. Accordingly, the electronic device  80  equipped with an auto-focusing mechanism and the optical anti-shake mechanism can be enhanced to achieve the superior image quality. Furthermore, the electronic device  80  according to the present disclosure can have a capturing function with multiple modes, such as taking optimized selfies, high dynamic range (HDR) under a low light condition, 4K resolution recording, etc. Furthermore, the users can visually see a captured image of the camera through the imaging control interface  810  and manually operate the view finding range on the imaging control interface  810  to achieve the autofocus function of what you see is what you get. 
     Moreover, the imaging lens assembly, the image sensor, the optical anti-shake mechanism, the sensing element and the focusing assisting module  86  can be disposed on a circuit board  84  and electrically connected to the associated components via a connector  841  to perform a capturing process, wherein the circuit board  84  can be a flexible printed circuit board (FPC). Since the current electronic devices, such as smart phones, have a tendency of being compact, the way of firstly disposing the imaging lens assembly and related components on the flexible printed circuit board and secondly integrating the circuit thereof into the main board of the electronic device via the connector can satisfy the requirements of the mechanical design and the circuit layout of the limited space inside the electronic device, and obtain more margins. The autofocus function of the imaging lens assembly can also be controlled more flexibly via the touch screen of the electronic device. According to the 8th embodiment, the sensing elements and the focusing assisting modules  86  are disposed on the circuit board  84  and at least one other flexible printed circuit board (not shown) and electrically connected to the associated components, such as the image signal processor, via corresponding connectors to perform the capturing process. In other embodiments (not shown), the sensing elements and the focusing assisting modules can also be disposed on the main board of the electronic device or carrier boards of other types according to requirements of the mechanical design and the circuit layout. 
       FIG. 8C  is a schematic view of the image captured by the ultra-wide angle image capturing apparatuses  821 ,  822  according to the 8th example in  FIG. 8A . In  FIG. 8C , comparing with the image captured via the wide angle image capturing apparatuses  824 ,  825 , the image captured via the ultra-wide angle image capturing apparatuses  821 ,  822  has wider visual angle and wider depth of field, but the image captured via the image captured via the ultra-wide angle image capturing apparatuses  821 ,  822  also has greater distortion. According to  FIG. 8C , the visual angle is 105 degrees to 125 degrees, the equivalent focal length is 11 mm to 14 mm, and the magnification ratio is 0.5 times. 
       FIG. 8D  is a schematic view of an image captured by the wide angle image capturing apparatuses  824 ,  825  according to the 8th example in  FIG. 8A . In  FIG. 8D , the image of the certain range with the high resolution can be captured via the image capturing apparatuses  824 ,  825 , and the image capturing apparatuses  824 ,  825  have the function of the high resolution and the low deformation. In particular,  FIG. 8D  is the partial enlarged view of  FIG. 8C . According to  FIG. 8D , the visual angle is 70 degrees to 90 degrees, the equivalent focal length is 22 mm to 30 mm, and the magnification ratio is 1 time. 
       FIG. 8E  is a schematic view of an image captured by the telephoto image capturing apparatus  826  according to the 8th example in  FIG. 8A . In  FIG. 8E , comparing with the image captured via the wide angle image capturing apparatuses  824 ,  825 , the image captured via the telephoto image capturing apparatus  826  has narrower visual angle and narrower depth of field. Hence, the telephoto image capturing apparatus  826  can be configured to capture the moving targets, that is, the telephoto image capturing apparatus  826  can be driven via an actuator (not shown) of the electronic device  80  to quick and continuous auto focus the moving targets, so as to make the image of the moving targets is not fuzzy owing to defocus. In particular,  FIG. 8E  is the partial enlarged view of  FIG. 8D . According to  FIG. 8E , the visual angle is 15 degrees to 30 degrees, the equivalent focal length is 100 mm to 150 mm, and the magnification ratio is 5 times. 
       FIG. 8F  is a schematic view of an image captured by the ultra-telephoto image capturing apparatus  823  according to the 8th example in  FIG. 8A . In  FIG. 8F , comparing with the image captured via the telephoto image capturing apparatus  826 , the image captured via the ultra-telephoto image capturing apparatus  823  has narrower visual angle and narrower depth of field, and the image captured by the ultra-telephoto image capturing apparatus  823  is easily fuzzy due to the shaking. Hence, the actuator is configure to provide the driving force to make the ultra-telephoto image capturing apparatus  823  focus on the targets, and the actuator is also configure to provide the feedback of modifying the shaking to obtain the effect of the optical image stabilization. In particular,  FIG. 8F  is the partial enlarged view of  FIG. 8D . According to  FIG. 8F , the visual angle is 4 degrees to 8 degrees, the equivalent focal length is 400 mm to 600 mm, and the magnification ratio is 20 times. 
     In  FIGS. 8C to 8F , the zooming function can be obtained via the electronic device  80 , when the scene is captured via the imaging lens assembly with different focal lengths cooperated with the function of image processing. 
     The foregoing description, for purpose of explanation, has been described with reference to specific examples. It is to be noted that Tables show different data of the different examples; however, the data of the different examples are obtained from experiments. The examples were chosen and described in order to best explain the principles of the disclosure and its practical applications, to thereby enable others skilled in the art to best utilize the disclosure and various examples with various modifications as are suited to the particular use contemplated. The examples depicted above and the appended drawings are exemplary and are not intended to be exhaustive or to limit the scope of the present disclosure to the precise forms disclosed. Many modifications and variations are possible in view of the above teachings.