Patent ID: 12189147

DETAILED DESCRIPTION

An imaging lens assembly includes a dual molded optical element, a plurality of imaging lens elements and a light blocking structure, wherein the dual molded optical element includes plastic materials with two different colors, the imaging lens elements are disposed in an inner space defined by the dual molded optical element, and the light blocking structure is disposed on an object-side surface of the dual molded optical element, so that the generation of stray light can be avoided.

It is worth to be mentioned that the present disclosure provides at least three types of light blocking structures, including a light blocking element, a light absorbing portion of the dual molded optical element and a light blocking thin layer. The principles and the concepts of the light blocking element, the light absorbing portion of the dual molded optical element and the light blocking thin layer are the same. The light blocking element, the light absorbing portion of the dual molded optical element and the light blocking thin layer can be disposed with different types according to different applications respectively in the imaging lens assembly, and it will be further described separately later.

According to one imaging lens assembly of the present disclosure, the dual molded optical element has an object-side surface and an image-side surface and includes a light transmitting portion and a light absorbing portion, wherein the light transmitting portion includes an optical effective section. The light absorbing portion is located on at least one of the object-side surface and the image-side surface of the dual molded optical element, and a plastic material of the light absorbing portion and a plastic material of the light transmitting portion are different colors. In detail, the optical effective section mentioned in the present disclosure is a region which the imaging light passes through, each surfaces of the optical effective section can be a planar surface or an aspheric surface. When the optical effective section is blocked, the image would be affected. The light absorbing portion mentioned in the present disclosure is a region which the visible light cannot pass through (for example, the transmittance of the visible light is less than 50%) and a color of a material of the light absorbing portion can be black. Furthermore, the optical effective section includes at least one aspheric surface so that the distribution of the optical refractive power of the optical effective section can be adjusted effectively so as to prevent the marginal light rays from being excessively refractive and increasing the failure occasions of the injection molding process.

The light absorbing portion includes a plurality of parallel inner surfaces and a plurality of connecting inner surfaces, wherein an inner space is defined by the parallel inner surfaces and the connecting inner surfaces. In more detail, the parallel inner surfaces and the connecting inner surfaces are disposed on an inner surface of the light absorbing portion.

The imaging lens elements are disposed in the inner space along an optical axis of the imaging lens assembly and correspond to the optical effective section of the light transmitting portion.

The light blocking element is disposed adjacent to the light transmitting portion of the dual molded optical element, wherein the light blocking element has a central opening corresponding to the optical effective section of the light transmitting portion. Therefore, by the arrangement of the light blocking element, the generation of the stray light can be reduced effectively. Furthermore, in addition to defining the inner space capable of accommodating the imaging lens elements, the parallel inner surfaces and the connecting inner surfaces are favorable for aligning the imaging lens elements.

When a diameter of an outer diameter surface of the light transmitting portion is ΦL, and a maximum inner diameter of the inner surface of the light absorbing portion is ΦBmax, the following condition is satisfied: 0.2<ΦL/ΦBmax<0.85. It is favorable for reducing a size of the object side of the imaging lens assembly by reducing the range of the outer diameter of the light transmitting portion. More preferably, the following condition can be satisfied: 0.35<ΦL/ΦBmax<0.75.

The light transmitting portion and the light absorbing portion of the dual molded optical element can be formed by a dual-shot injection molded method. In detail, the term “molded” mentioned in the present disclosure refers to dual-shot injection molded process or secondary molded process. Therefore, the concentricity between the optical effective section and the inner space can be provided by the precision of the molds, so that the accuracy of the alignment of the imaging lens elements to the optical effective section will not be affected by the assembling tolerance so as to improve the optical resolution quality.

The light blocking element can be made of a plastic material. The light transmitting portion can further include a first axial connecting surface, the light blocking element can further include a second axial connecting surface, and the first axial connecting surface is connected to the second axial connecting surface so as to align the central opening of the light blocking element and a center of the dual molded optical element. Therefore, the overlapping coverage between the light entering opening of the imaging lens assembly and the optical effective section is better, and it is favorable for preventing a part of the light from passing an outside of the optical effective section and then forming stray light which is unable to form images, so that the probability of stray light generation can be reduced.

When a diameter of the central opening of the light blocking element is Φi, and a minimum inner diameter of the light absorbing portion is Φbi, the following condition can be satisfied: 0.70<Φi/Φbi<1.43. Therefore, it is favorable for enhancing the efficiency for blocking unexpected lights, especially for enhancing the light blocking efficiency of an area that the incident angle is larger than the viewing angle when a strong light enters the imaging lens assembly.

The light absorbing portion can further include a third axial connecting surface for connecting to at least one of the imaging lens elements adjacent thereto so as to align the center of the dual molded optical element and a center of the at least one of the imaging lens elements. Therefore, it is favorable for reducing the tilting situation of the imaging lens elements during the assembling process by the aligning structure of the light absorbing portion.

When a central thickness of the optical effective section is CT, and a maximum height of the dual molded optical element parallel to the optical axis is H, the following condition can be satisfied: 0.05<CT/H<0.4. Therefore, warpage of the overly thin optical effective section caused by the shrinking of the light absorbing portion can be avoided.

When a number of the imaging lens elements which can be accommodated in the inner space is N, the following condition can be satisfied: 3<N≤7. Therefore, it is favorable for accommodating more imaging lens elements so as to correspond to more different optical specifications, so that the scope of application can be more diversified.

At least one of an object-side surface and an image-side surface of the optical effective section can change from concave to convex from a paraxial region thereof to a peripheral region thereof. Therefore, it is favorable for further adjusting the distribution of the optical refractive power of the optical effective section greatly so as to prevent the marginal light rays from being excessively refractive and increasing the failure occasions of the injection molding process.

The light transmitting portion can further include an outer diameter surface exposed on an outside of the imaging lens assembly. In other words, the outer diameter surface of the light transmitting portion is uncovered. Therefore, it is favorable for designing better molding conditions of the mold, so that it is favorable for controlling the production quality in mass production and obtaining more abundant molding adjustment margins.

The central opening of the light blocking element can be surrounded by a tip structure, and when an angle of the tip structure is θ, the following condition can be satisfied: 45 degrees<θ<120 degrees. Therefore, the flashes generated during the molding process or the short shot situation caused by insufficient filling of the central opening can be reduced. Moreover, the tip structure can include an object-side terminal surface and an image-side terminal surface, and the object-side terminal surface is linearly shrunk from an object side to an image side of the imaging lens assembly, and the image-side terminal surface is linearly shrunk from the image side to the object side of the imaging lens assembly. Therefore, it is favorable for reduce the injuries caused by the uneven clamping power applied to the mold during the production process.

Furthermore, the inner space can be gradually increased along at least one of an object-side direction and an image-side direction of the imaging lens assembly. Therefore, it is suitable for optical designing demands with higher resolution.

The imaging lens assembly can further include a maintaining element directly contacted with at least one of the parallel inner surfaces so as to position the imaging lens elements in the inner space. Therefore, the overall mechanical stability of the imaging lens assembly can be enhanced, and the optical resolution will not be affected easily by external force.

The present disclosure provides another imaging lens assembly including a dual molded optical element and a plurality of imaging lens elements. The dual molded optical element has an object-side surface and an image-side surface and includes a light transmitting portion and a light absorbing portion, wherein a plastic material of the light transmitting portion and a plastic material of the light absorbing portion are different colors, and the light transmitting portion and the light absorbing portion of the dual molded optical element can be formed by a dual-shot injection molded method. The light transmitting portion includes an optical effective section, the light absorbing portion can include a first light absorbing portion and a second light absorbing portion, the first light absorbing portion and the second light absorbing portion are disposed on the object-side surface and the image-side surface of the dual molded optical element, respectively, and separated by the light transmitting portion, wherein the first light absorbing portion is a light absorbing area and has a central opening, the second light absorbing portion extends to a direction away from the light transmitting portion and includes a plurality of parallel inner surfaces and a plurality of connecting inner surfaces, and an inner space is defined by the parallel inner surfaces and the connecting inner surfaces. That is, the light absorbing portion of the imaging lens assembly can be one part of the light absorbing portion of the dual molded optical element instead of an extra arranged element. Therefore, it is favorable for the assembly of the imaging lens assembly and reducing the size thereof. The imaging lens elements are disposed in the inner space along the optical axis of the imaging lens assembly and correspond to the optical effective section of the light transmitting portion. When a diameter of the central opening of the light absorbing portion is Φi1, and a minimum inner diameter of the light absorbing portion is Φbi2, the following condition is satisfied: 0.70<Φi1/Φbi2<1.43.

The second light absorbing portion can include a third axial connecting surface for connecting to at least one of the imaging lens elements adjacent thereto so as to align a center of the dual molded optical element and a center of at least one of the imaging lens elements. Therefore, it is favorable for reducing the tilting situation of the imaging lens elements during the assembling process by the aligning structure of the light absorbing portion.

When a central thickness of the optical effective section is CT, and a maximum height of the dual molded optical element parallel to the optical axis is H, the following condition can be satisfied: 0.05<CT/H<0.4. Therefore, warpage of the overly thin optical effective section caused by the shrinking of the light absorbing portion can be avoided.

The light transmitting portion can further include an outer diameter surface exposed on an outside of the imaging lens assembly. In other words, the outer diameter surface of the light transmitting portion is uncovered. Therefore, it is favorable for designing better molding conditions of the mold, so that it is favorable for controlling the production quality in mass production and obtaining more abundant molding adjustment margins.

The central opening of the light blocking element can be surrounded by a tip structure, and when an angle of the tip structure is θ, the following condition can be satisfied: 45 degrees<θ<120 degrees. Therefore, the flashes generated during the molding process or the short shot situation caused by insufficient filling of the central opening can be reduced.

The present disclosure provides still another imaging lens assembly including a dual molded optical element, a plurality of imaging lens elements and a light blocking thin layer. The dual molded optical element has an object-side surface and an image-side surface and includes a light transmitting portion and a light absorbing portion, and the light transmitting portion and the light absorbing portion which can be formed by a dual-shot injection molded method. The light transmitting portion includes an optical effective section, and the light absorbing portion is located on at least one of the object-side surface and the image-side surface of the dual molded optical element. A plastic material of the light absorbing portion and a plastic material of the light transmitting portion are different colors, wherein the light absorbing portion includes a plurality of parallel inner surfaces and a plurality of connecting inner surfaces, and an inner space is defined by the parallel inner surfaces and the connecting inner surfaces. The imaging lens elements are disposed in the inner space along the optical axis of the imaging lens assembly and correspond to the optical effective section of the light transmitting portion. The light blocking thin layer is disposed on the light transmitting portion of the dual molded optical element and forms a central opening, and the central opening corresponds to the optical effective section of the light transmitting portion. When a diameter of an outer diameter surface of the light transmitting portion is ΦL, and a maximum inner diameter of an inner surface of the light absorbing portion is ΦBmax, the following condition is satisfied: 0.2<ΦL/ΦBmax<0.85. In detail, the light blocking thin layer can be a light blocking sheet or a light blocking coating. Therefore, it is favorable for reducing a size of the object side of the imaging lens assembly effectively.

The light absorbing portion can further include a third axial connecting surface for connecting to at least one of the imaging lens elements adjacent thereto so as to align the center of the dual molded optical element and a center of at least one of the imaging lens elements. Therefore, it is favorable for reducing the tilting situation of the imaging lens elements during the assembling process by the aligning structure of the light absorbing portion.

The light transmitting portion can further include an outer diameter surface covered with an opaque coating. By the aforementioned arrangement, the light blocking thin layer, the opaque coating and the light absorbing portion can form a light trap structure. Therefore, it is not easy to cause reflections inside the imaging lens assembly when stray light enters therein so as to reduce the effects of the stray light.

When a number of the imaging lens elements which can be accommodated in the inner space is N, the following condition can be satisfied: 3<N≤7. Therefore, it is favorable for accommodating more imaging lens elements so as to correspond to more different optical specifications, so that the scope of application can be more diversified.

The light absorbing portion is located on only one of the object-side surface and the image-side surface of the dual molded optical element. Therefore, the complexity of dual-shot injection molded method can be simplified so as to increase the surface precision of the optical effective section.

The inner space is gradually increased along at least one of an object-side direction and an image-side direction of the imaging lens assembly. Therefore, it is suitable for optical designing demands with higher resolution, and the outer diameters of a part of the imaging lens elements can be reduced so as to reduce the paths of the unexpected light effectively, so that some optical designs with a large amount of incident light can have less influence by stray light.

Furthermore, a shape of the dual molded optical element can be stepped. Therefore, the structural intensity of the light absorbing portion can be increased, and it is favorable for maintaining a better roundness of the parallel inner surface.

Each of the aforementioned features of the imaging lens assembly of the present disclosure can be utilized in numerous combinations, so as to achieve the corresponding functionality.

The present disclosure further provides an electronic device including any one of the imaging lens assemblies according to the aforementioned aspects and an image sensor, wherein the image sensor is disposed on an image surface of the imaging lens assembly. Therefore, it is favorable for enhancing the image quality. More preferably, the electronic device can further include a control unit, a display, a storage unit, a random-access memory (RAM), or the combination thereof.

According to the above descriptions, the specific embodiments and reference drawings thereof are given below so as to describe the present disclosure in detail.

1st Embodiment

FIG.1Ais a partial exploded view of an imaging lens assembly100according to the 1st embodiment of the present disclosure.FIG.1Bis an assembly schematic view of the imaging lens assembly100according to the 1st embodiment ofFIG.1A. As shown inFIG.1AandFIG.1B, the imaging lens assembly100includes a dual molded optical element110, a plurality of imaging lens elements and a light blocking element130, and an image side of the imaging lens assembly100further includes an image surface140. The imaging lens elements are disposed in the dual molded optical element110, and the light blocking element130is connected to one side of the dual molded optical element110.

The dual molded optical element110has an object-side surface and an image-side surface and includes a light transmitting portion111and a light absorbing portion113. A plastic material of the light transmitting portion111and a plastic material of the light absorbing portion113are different colors, and the light transmitting portion111and the light absorbing portion113are formed by a dual-shot injection molded method. The light transmitting portion111includes an optical effective section112. An object-side surface and an image-side surface of the optical effective section112are both aspheric, and the image-side surface of the optical effective section112changes from concave to convex from a paraxial region thereof to a peripheral region thereof.

The light absorbing portion113is located on at least one of the object-side surface and the image-side surface of the dual molded optical element110. In particular, in the 1st embodiment, the light absorbing portion113is only located on the image-side surface of the dual molded optical element110. The light absorbing portion113includes a plurality of parallel inner surfaces113a, a plurality of connecting inner surfaces113band a third axial connecting surface113c. Please refer toFIG.1C, which is a three-dimensional schematic view of the dual molded optical element110and the light blocking element130according to the 1st embodiment ofFIG.1A. As shown inFIG.1A,FIG.1BandFIG.1C, an inner space114is defined by the parallel inner surfaces113aand the connecting inner surfaces113b. In particular, in the 1st embodiment, numbers of the parallel inner surfaces113aand the connecting inner surfaces113bare respectively three, and the parallel inner surfaces113aand the connecting inner surfaces113bare disposed alternately with each other. The inner space114is gradually increased along an image-side direction of the imaging lens assembly100. Furthermore, the third axial connecting surface113cis for connecting to at least one of the imaging lens elements adjacent thereto so as to align a center of the dual molded optical element100and a center of at least one of the imaging lens elements. In particular, in the 1st embodiment, the third axial connecting surface113cis connected to a first imaging lens element121.

In the imaging lens assembly100according to the 1st embodiment, a number of the imaging lens elements is five, which are a first imaging lens element121, a second imaging lens element122, a third imaging lens element123, a fourth imaging lens element124and a fifth imaging lens element125. The first imaging lens element121, the second imaging lens element122, the third imaging lens elements123, the fourth imaging lens element124and the fifth imaging lens element125are disposed in the inner space114along an optical axis X of the imaging lens assembly100and correspond to the optical effective section112of the light transmitting portion111. Furthermore, an optical element, such as a light blocking sheet, can be disposed between the imaging lens elements according to requirements, and there is no reference numbers and descriptions in the 1st embodiment.

The light blocking element130is made of a plastic material and disposed adjacent to the light transmitting portion111of the dual molded optical element110, and the light blocking element130has a central opening131corresponding to the optical effective section112of the light transmitting portion111. Please refer toFIG.1D, which is another three-dimensional schematic view of the dual molded optical element110and the light blocking element130according to the 1st embodiment ofFIG.1A. As shown inFIG.1A,FIG.1BandFIG.1D, the light transmitting portion111further includes a first axial connecting surface111b, the light blocking element130further includes a second axial connecting surface132, and the first axial connecting surface111bis connected to the second axial connecting surface132so as to align the central opening131of the light blocking element130and the center of the dual molded optical element100. Furthermore, the light transmitting portion111can further include an outer diameter surface111a, and the light blocking element130is disposed on an object side of the light transmitting portion111. The light blocking element130is connected to the first axial connecting surface111bvia the second axial connecting surface132and will not cover the outer diameter surface111a, so that the outer diameter surface111aof the light transmitting portion111is exposed on an outside of the imaging lens assembly100.

FIG.1Eis a schematic view of related parameters of the dual molded optical element110and the light blocking element130according to the 1st embodiment ofFIG.1A. As shown inFIG.1E, a diameter of the outer diameter surface of the light transmitting portion111is ΦL, a maximum inner diameter of an inner surface of the light absorbing portion113is ΦBmax, a diameter of the central opening131of the light blocking element130is Φi, a minimum inner diameter of the light absorbing portion113is Φbi, a central thickness of the optical effective section112is CT, a maximum height of the dual molded optical element110parallel to the optical axis X is H, and a number of the imaging lens elements which can be accommodated in the inner space114is N. Furthermore, the central opening131of the light blocking element130is surrounded by a tip structure133, and an angle of the tip structure133is θ. In particular, the tip structure133includes an object-side terminal surface133aand an image-side terminal surface133b, the object-side terminal surface133ais linearly shrunk from an object side to the image side of the imaging lens assembly100, the image-side terminal surface133bis linearly shrunk from the image side to the object side of the imaging lens assembly100, and the angle θ of the tip structure133is an angle between the object-side terminal surface133aand the image-side terminal surface133b. The data of the aforementioned parameters according to the 1st embodiment of the present disclosure are listed below.

1st embodimentϕL (mm)3.78CT (mm)0.677ϕBmax (mm)5.89H (mm)4.2737ϕL/ϕBmax0.64CT/H0.16ϕi (mm)2.204N5ϕbi (mm)2.32θ (degrees)72.45ϕi/ϕbi0.95

2nd Embodiment

FIG.2Ais a partial exploded view of an imaging lens assembly200according to the 2nd embodiment of the present disclosure.FIG.2Bis an assembly schematic view of the imaging lens assembly200according to the 2nd embodiment ofFIG.2A. As shown inFIG.2AandFIG.2B, the imaging lens assembly200includes a dual molded optical element210and a plurality of imaging lens elements, and an image side of the imaging lens assembly200further includes an image surface240. The imaging lens elements are disposed in the dual molded optical element210.

The dual molded optical element210has an object-side surface and an image-side surface and includes a light transmitting portion211and a light absorbing portion (reference number is omitted). A plastic material of the light transmitting portion211and a plastic material of the light absorbing portion are different colors, the light transmitting portion211and the light absorbing portion are formed by a dual-shot injection molded method, and the light absorbing portion includes a first light absorbing portion212and a second light absorbing portion213.

Please refer toFIG.2C(1),FIG.2C(2),FIG.2C(3),FIG.2C(4) andFIG.2C(5), which are respectively a step schematic view of a dual-shot injection molded process of the dual molded optical element210according to the 2nd embodiment. As shown inFIG.2C(1) andFIG.2C(2), in the 2nd embodiment, a mold270including a fixed side element271and a movable side element272is provided, and a chamber between the fixed side element271and the movable side element272is for perfusing the plastic material of the light absorbing portion212so as to form the first light absorbing portion212. As shown inFIG.2C(3) and FIG.2C(4), in the 2nd embodiment, a mold280including a fixed side element281, a movable side element282and a sliding element283is provided, and a chamber between the fixed side element281, the movable side element282and the sliding element283is for perfusing the plastic material of the light absorbing portion so as to form the second light absorbing portion213. As shown inFIG.2C(5), after the first light absorbing portion212and the second light absorbing portion213are formed, the movable side element272of the mold270is replaced with the movable side element282and the sliding element283of the mold280before a mold releasing step, so that a chamber between the first light absorbing portion212and the second light absorbing portion213can be for perfusing the plastic material of the light transmitting portion211so as to form the light transmitting portion211. Therefore, the dual molded optical element210can be formed by the dual-shot injection molded method.

As shown inFIG.2A, the light transmitting portion211includes an optical effective section211ahaving an object-side surface and an image-side surface being both aspheric, and the image-side surface of the optical effective section211achanges from concave to convex from a paraxial region thereof to a peripheral region thereof.

The first light absorbing portion212and the second light absorbing portion213of the light absorbing portion are disposed on the object-side surface and the image-side surface of the dual molded optical element210, respectively, and separated by the light transmitting portion211. The first light absorbing portion212is a light blocking area and has a central opening212a, the second light absorbing portion213extends to a direction away from the light transmitting portion211and includes a plurality of parallel inner surfaces213a, a plurality of connecting inner surfaces213band a third axial connecting surface213c. An inner space214is defined by the parallel inner surfaces213aand the connecting inner surfaces213b. The third axial connecting surface213cis for connecting to at least one of the imaging lens elements adjacent thereto so as to align a center of the dual molded optical element210and a center of the at least one of the imaging lens elements. In particular, in the 2nd embodiment, the third axial connecting surface213cis connected to a first imaging lens elements221.

In the imaging lens assembly200according to the 2nd embodiment, a number of the imaging lens elements is four, which are a first imaging lens element221, a second imaging lens element222, a third imaging lens element223and a fourth imaging lens element224. The first imaging lens element221, the second imaging lens element222, the third imaging lens element223and the fourth imaging lens element224are disposed in the inner space241along an optical axis X of the imaging lens assembly200and correspond to the optical effective section211aof the light transmitting portion211. Furthermore, an optical element, such as a light blocking sheet and a spacer, can be disposed between the imaging lens elements, other optical elements, such as filters, etc., can be disposed between the image surface240and the imaging lens elements according to requirements, and there is no reference numbers and descriptions in the 2nd embodiment.

Furthermore, the light transmitting portion211can further include an outer diameter surface211b. During the molding process, the first light absorbing portion212and the second light absorbing portion213are respectively disposed on an object side and an image side of the light transmitting portion211and will not cover the outer diameter surface211b, so that the outer diameter surface211bof the light transmitting portion211is exposed on an outside of the imaging lens assembly200.

Furthermore, the imaging lens assembly200can further include a maintaining element250, which is directly contacted with at least one of the parallel inner surfaces213aso as to position the imaging lens elements in the inner space214.

FIG.2Dis a schematic view of related parameters of the dual molded optical element200according to the 2nd embodiment ofFIG.2A. As shown inFIG.2D, a diameter of the outer diameter surface of the light transmitting portion211is ΦL, a maximum inner diameter of an inner surface of the light absorbing portion is ΦBmax, a diameter of the central opening of the light absorbing portion (that is, a diameter of the central opening212aof the first light absorbing portion212) is Φi1, a minimum inner diameter of the second light absorbing portion213is Obit, a central thickness of the optical effective section211ais CT, a maximum height of the dual molded optical element210parallel to the optical axis X is H, and a number of the imaging lens elements which can be accommodated in the inner space214is N. Furthermore, the central opening212aof the first light absorbing portion212is surrounded by a tip structure215, and an angle of the tip structure215is θ. In particular, the tip structure215includes an object-side terminal surface215aand an image-side terminal surface215b, the object-side terminal surface215ais linearly shrunk from an object side to the image side of the imaging lens assembly200, the image-side terminal surface215bis linearly shrunk from the image side to the object side of the imaging lens assembly200, and the angle θ of the tip structure215is an angle between the object-side terminal surface215aand the image-side terminal surface215b. The data of the aforementioned parameters according to the 2nd embodiment of the present disclosure are listed below.

2nd embodimentϕL (mm)3.617CT (mm)0.627ϕBmax (mm)6.2H (mm)3.68ϕL/ϕBmax0.58CT/H0.17ϕi1 (mm)1.88N4ϕbi2 (mm)2.2045θ(degrees)90.84ϕi1/ϕbi20.85

3rd Embodiment

FIG.3Ais a partial exploded view of an imaging lens assembly300according to the 3rd embodiment of the present disclosure.FIG.3Bis an assembly schematic view of the imaging lens assembly300according to the 3rd embodiment ofFIG.3A. As shown inFIG.3AandFIG.3B, the imaging lens assembly300includes a dual molded optical element310, a plurality of imaging lens elements and a light blocking element330, and an image side of the imaging lens assembly300further includes an image surface340. The imaging lens elements are disposed in the dual molded optical element310, and the light blocking element330is connected to one side of the dual molded optical element310.

The dual molded optical element310has an object-side surface and an image-side surface and includes a light transmitting portion311and a light absorbing portion313. A plastic material of the light transmitting portion311and a plastic material of the light absorbing portion313are different colors, and the light transmitting portion311and the light absorbing portion313are formed by a dual-shot injection molded method.

Please refer toFIG.3C(1),FIG.3C(2) andFIG.3C(3), which are respectively a step schematic view of a dual-shot injection molded process of the dual molded optical element310according to the 3rd embodiment. As shown inFIG.3C(1) andFIG.3C(2), a mold370including a fixed side element371, a movable side element372and a sliding element373is provided, and a chamber between the fixed side element371, the movable side element372and the sliding element373is for perfusing the plastic material of the light absorbing portion313so as to form the light absorbing portion313. As shown inFIG.3C(3), the movable side element372can be replaced with a movable side element374, and a chamber between the movable side element374, the sliding element373and the fixed side element371can be for perfusing the plastic material of the light transmitting portion311so as to form the light transmitting portion311. Therefore, the dual molded optical element310can be formed by the dual-shot injection molded method.

In the 3rd embodiment, the light transmitting portion311of the dual molded optical element310includes an optical effective section312. The object-side surface and the image-side surface of the optical effective section312are both aspheric, and the image-side surface of the optical effective section312changes from concave to convex from a paraxial region thereof to a peripheral region thereof.

The light absorbing portion313is located on at least one of the object-side surface and the image-side surface of the dual molded optical element310. In particular, in the 3rd embodiment, the light absorbing portion313is only located on the image-side surface of the dual molded optical element310. The light absorbing portion313includes a plurality of parallel inner surface313a, a plurality of connecting inner surface313band a third axial connecting surface313c, wherein an inner space314is defined by the parallel inner surfaces313aand the connecting inner surfaces313b. The inner space314is gradually increased along an image-side direction of the imaging lens assembly300. The third axial connecting surface313cis for connecting to at least one of the imaging lens elements adjacent thereto so as to align a center of the dual molded optical element300and a center of the at least one of the imaging lens elements. In particular, in the 3rd embodiment, the third axial connecting surface313cis connected to a first imaging lens elements321.

In the imaging lens assembly300according to the 3rd embodiment, a number of the imaging lens elements is four, which are a first imaging lens element321, a second imaging lens element322, a third imaging lens element323and a fourth imaging lens element324. The first imaging lens element321, the second imaging lens element322, the third imaging lens element323and the fourth imaging lens element324are disposed in the inner space314along an optical axis X of the imaging lens assembly300and correspond to the optical effective section312of the light transmitting portion311. Furthermore, an optical element, such as a light blocking sheet and a spacer, can be disposed between the imaging lens elements, other optical elements, such as filters, etc., can be disposed between the image surface340and the imaging lens elements according to requirements, and there is no reference numbers and descriptions in the 3rd embodiment.

The light blocking element330is made of a plastic material and disposed adjacent to the light transmitting portion311of the dual molded optical element310, and the light blocking element330has a central opening331corresponding to the optical effective section312of the light transmitting portion311. The light transmitting portion311further includes a first axial connecting surface311b, the light blocking element330further includes a second axial connecting surface332, and the first axial connecting surface311bis connected to the second axial connecting surface332so as to align the central opening331of the light blocking element330and the center of the dual molded optical element300. Furthermore, the light transmitting portion311can further include an outer diameter surface311a, the light blocking element330is disposed on an object side of the light transmitting portion311. The light blocking element330is connected to the first axial connecting surface311bvia the second axial connecting surface332and will not cover the outer diameter surface311a, so that the outer diameter surface311aof the light transmitting portion311is exposed on an outside of the imaging lens assembly300.

Furthermore, the imaging lens assembly300can further include a maintaining element350, which is directly contacted with at least one of the parallel inner surfaces313aso as to position the imaging lens elements in the inner space314.

The data of the aforementioned parameters according to the 3rd embodiment of the present disclosure are listed below, wherein the definitions of these parameters shown below are the same as those stated in the 1st embodiment and will not be described thereto.

3rd embodimentϕL (mm)3.617CT (mm)0.627ϕBmax (mm)6.2H (mm)3.6715ϕL/ϕBmax0.58CT/H0.17ϕi (mm)1.88N4ϕbi (mm)2.2045θ(degrees)84.66ϕi/ϕbi0.85

4th Embodiment

FIG.4Ais a partial exploded view of an imaging lens assembly400according to the 4th embodiment of the present disclosure.FIG.4Bis an assembly schematic view of the imaging lens assembly400according to the 1st embodiment ofFIG.4A. As shown inFIG.4AandFIG.4B, the imaging lens assembly400includes a dual molded optical element410, a plurality of imaging lens elements and a light blocking thin layer430, and an image side of the imaging lens assembly400further includes an image surface440. The imaging lens elements are disposed in the dual molded optical element410, and the light blocking thin layer430is connected to one side of the dual molded optical element410, wherein a shape of the dual molded optical element410is stepped.

The dual molded optical element410has an object-side surface and an image-side surface and includes a light transmitting portion411and a light absorbing portion413. A plastic material of the light transmitting portion411and a plastic material of the light absorbing portion413are different colors, and the light transmitting portion411and the light absorbing portion413are formed by a dual-shot injection molded method.

In the 4th embodiment, the light transmitting portion411of the dual molded optical element410includes an optical effective section412, an object-side surface and an image-side surface of the optical effective section412are both aspheric, and the image-side surface of the optical effective section412changes from concave to convex from a paraxial region thereof to a peripheral region thereof.

The light absorbing portion413is located on at least one of the object-side surface and the image-side surface of the dual molded optical element410. In particular, in the 4th embodiment, the light absorbing portion413is only located on the image-side surface of the dual molded optical element410. The light absorbing portion413includes a plurality of parallel inner surfaces413a, a plurality of connecting inner surfaces413band a third axial connecting surface413c, wherein an inner space414is defined by the parallel inner surfaces413aand the connecting inner surfaces413b. The inner space414is gradually increased along an image-side direction of the imaging lens assembly400. The third axial connecting surface413cis for connecting to at least one of the imaging lens elements adjacent thereto so as to align a center of the dual molded optical element400and a center of at least one of the imaging lens elements. In particular, in the 4th embodiment, the third axial connecting surface413cis connected to the first imaging lens elements421.

In the imaging lens assembly400according to the 4th embodiment, a number of the imaging lens elements is five, which are a first imaging lens element421, a second imaging lens element422, a third imaging lens element423, a fourth imaging lens element424and a fifth imaging lens element425. The first imaging lens element421, the second imaging lens element422, the third imaging lens element423, the fourth imaging lens element424and the fifth imaging lens element425are disposed in the inner space414along an optical axis X of the imaging lens assembly400and correspond to the optical effective section412of the light transmitting portion411. Furthermore, an optical element, such as a light blocking sheet, can be disposed between the imaging lens elements according to requirements, and there is no reference numbers and descriptions in the 4th embodiment.

The light blocking thin layer430is disposed on the light transmitting portion411of the dual molded optical element410and form a central opening431corresponding to the optical effective section412of the light transmitting portion411. In particular, in the 4th embodiment, the light blocking thin layer430is a light blocking sheet.

As shown inFIG.4B, the light transmitting portion411can further include an outer diameter surface411acovered with an opaque coating450.

FIG.4Cis a schematic view of related parameters of the dual molded optical element410and the light blocking thin layer430according to the 4th embodiment ofFIG.4A. As shown inFIG.4C, a diameter of the outer diameter surface of the light transmitting portion411is ΦL, a maximum inner diameter of an inner surface of the light absorbing portion413is ΦBmax, a diameter of the central opening of the light blocking thin layer430is Φi2, a minimum inner diameter of the light absorbing portion413is Φbi, a central thickness of the optical effective section412is CT, a maximum height of the dual molded optical element410parallel to the optical axis X is H, and a number of the imaging lens elements which can be accommodated in the inner space414is N. The data of the aforementioned parameters according to the 4th embodiment of the present disclosure are listed below.

4th embodimentϕL (mm)3.78CT (mm)0.677ϕBmax (mm)5.89H (mm)4.2737ϕL/ϕBmax0.64CT/H0.16ϕi2 (mm)2.204N5ϕbi (mm)2.32ϕi2/ϕbi0.95

5th Embodiment

FIG.5Ais a partial exploded view of an imaging lens assembly500according to the 5th embodiment of the present disclosure.FIG.5Bis an assembly schematic view of the imaging lens assembly500according to the 5th embodiment ofFIG.5A. As shown inFIG.5AandFIG.5B, the imaging lens assembly500includes a dual molded optical element510, a plurality of imaging lens elements and a light blocking thin layer530, and an image side of the imaging lens assembly500further includes an image surface540. The imaging lens elements are disposed in the dual molded optical element510, and the light blocking thin layer530is connected to one side of the dual molded optical element510, wherein a shape of the dual molded optical element510is stepped.

The dual molded optical element510has an object-side surface and an image-side surface and includes a light transmitting portion511and a light absorbing portion513. A plastic material of the light transmitting portion511and a plastic material of the light absorbing portion513are different colors, and the light transmitting portion511and the light absorbing portion513are formed by a dual-shot injection molded method.

In the 5th embodiment, the light transmitting portion511of the dual molded optical element510includes an optical effective section512, an object-side surface and an image-side surface of the optical effective section512are both aspheric, and the image-side surface of the optical effective section512changes from concave to convex from a paraxial region thereof to a peripheral region thereof.

The light absorbing portion513is located on at least one of the object-side surface and the image-side surface of the dual molded optical element510. In particular, in the 5th embodiment, the light absorbing portion513is only located on the image-side surface of the dual molded optical element510. The light absorbing portion513includes a plurality of parallel inner surfaces513a, a plurality of connecting inner surfaces513band a third axial connecting surface513c, wherein an inner space514is defined by the parallel inner surfaces513aand the connecting inner surfaces513b. The inner space514is gradually increased along an image-side direction of the imaging lens assembly500. The third axial connecting surface513cis for connecting to at least one of the imaging lens elements adjacent thereto so as to align a center of the dual molded optical element500and a center of the at least one of the imaging lens elements. In particular, in the 5th embodiment, the third axial connecting surface513cis connected to the first imaging lens elements521.

In the imaging lens assembly500according to the 4th embodiment, a number of the imaging lens elements is five, which are a first imaging lens element521, a second imaging lens element522, a third imaging lens element523, a fourth imaging lens element524and a fifth imaging lens element525. The first imaging lens element521, the second imaging lens element522, the third imaging lens element523, the fourth imaging lens element524and the fifth imaging lens element525are disposed in the inner space514along an optical axis X of the imaging lens assembly500and correspond to the optical effective section512of the light transmitting portion511. Furthermore, an optical element, such as a light blocking sheet, can be disposed between the imaging lens elements according to requirements, and there is no reference numbers and descriptions in the 5th embodiment.

The light blocking thin layer530is disposed on the light transmitting portion511of the dual molded optical element510and forms a central opening531corresponding to the optical effective section512of the light transmitting portion511. In particular, in the 5th embodiment, the light blocking thin layer530is an opaque coating which can be applied on the light transmitting portion511by a spraying method.

The data of the aforementioned parameters according to the 5th embodiment of the present disclosure are listed below, wherein the definitions of these parameters shown below are the same as those stated in the 4th embodiment and will not be described thereto.

5th embodimentϕL (mm)3.78CT (mm)0.677ϕBmax (mm)5.89H (mm)4.2737ϕL/ϕBmax0.64CT/H0.16ϕbi (mm)2.32N5

6th Embodiment

FIG.6Ais a schematic view of an electronic device700according to the 6th embodiment of the present disclosure.FIG.6Bis another schematic view of the electronic device700according to the 6th embodiment ofFIG.6A. As shown inFIG.6AandFIG.6B, the electronic device700of the 6th embodiment is a smartphone and includes an imaging lens assembly710according to the aforementioned aspects and an image sensor720, wherein the imaging lens assembly710can be the imaging lens assembly according to any one of the aforementioned embodiments (not shown) but not be limited thereto. The image sensor720is disposed on an image surface (not shown) of the imaging lens assembly710. Therefore, marketing demands for mass production and outward appearance of the imaging lens assembly modules on electronic device can be achieved.

Specifically, the user activates the capturing mode by the user interface69of the electronic device700, wherein the user interface69of the 6th embodiment can be a touch screen69a, a button69b, etc. At this moment, imaging lens assembly710collects imaging light on the image sensor720and outputs electronic signals associated with images to an image signal processor (ISP)68.

FIG.6Cis a block diagram of the electronic device700according to the 6th embodiment, in particular, the camera block diagram of the electronic device700. As shown inFIG.6AtoFIG.6C, the electronic device700can further include autofocus assembly63and an optical anti-shake mechanism64in response to the camera specification of the electronic device700. Moreover, the electronic device700can further include at least one auxiliary optical component67and at least one sensing component66. The auxiliary optical component67can be flash modules, infrared distance measurement components, laser focus modules and modules for compensating for color temperatures. The sensing component66can have functions for sensing physical momentum and kinetic energies, such as an accelerator, a gyroscope, and a hall effect element, so as to sense shaking or jitters applied by hands of the user or external environments, thus the autofocus assembly63and the optical anti-shake mechanism64disposed on the electronic device700can function to obtain great image quality and facilitate the electronic device700according to the present disclosure to have a capturing function with multiple modes, such as taking optimized selfies, high dynamic range (HDR) with a low light source, 4K resolution recording, etc. Furthermore, the user can visually see the captured image of the camera through the touch screen69aand manually operate the view finding range on the touch screen69ato achieve the auto focus function of what you see is what you get.

Furthermore, as shown inFIG.6B, the imaging lens assembly710, the image sensor720, the autofocus assembly63, the optical anti-shake mechanism64, the sensing component66and the auxiliary optical component67can be disposed on a flexible printed circuit board (FPC)97and electrically connected with the associated elements, such as an image signal processor68, via connector98so as to perform a capturing process. Because the current electronic devices, such as smart phone, have a tendency of being light and thin, the way of disposing the imaging lens assembly and related elements on the flexible printed circuit board and then integrating the circuit into the main board of the electronic device via the connector can satisfy the mechanical design of the limited space inside the electronic device and the layout requirements, and obtain more margins. The auto focus function of the imaging lens assembly can be controlled more flexibly via the touch screen of the electronic device. In the 6th embodiment, the electronic device700includes a plurality of sensing components66and a plurality of auxiliary optical components67, the sensing components66and the auxiliary optical components67are disposed on the flexible printed circuit board77and at least one other flexible printed circuit board (reference number is not shown) and electrically connected with the associated elements, such as the image signal processor68, by corresponding connectors so as to perform a capturing process. In other embodiments (not shown), the image sensor and the auxiliary optical component can also be disposed on the main board of the electronic device or carrier boards in other forms according to requirements of the mechanical design and the circuit layout.

Moreover, the electronic device700can further include, but not be limited to, a display, a control unit, a storage unit, a random-access memory (RAM), a read-only memory (ROM), or the combination thereof.

7th Embodiment

FIG.7is a schematic view of an electronic device800according to the 7th embodiment of the present disclosure. The electronic device800of the 7th embodiment is a tablet, and the electronic device800include an imaging lens assembly810according the present disclosure and an image sensor (not shown), wherein the image sensor is disposed on an image surface of the imaging lens assembly810(not shown).

8th Embodiment

FIG.8is a schematic view of an electronic device900according to the 8th embodiment of the present disclosure. The electronic device900of the 8th embodiment is a wearable device, and the electronic device900includes a imaging lens assembly910according to the present disclosure and an image sensor (not shown), wherein the image sensor is disposed on an image surface of the imaging lens assembly910(not shown).

The foregoing description, for purpose of explanation, has been described with reference to specific embodiments. It is to be noted that Tables show different data of the different embodiments; however, the data of the different embodiments are obtained from experiments. The embodiments 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 embodiments with various modifications as are suited to the particular use contemplated. The embodiments 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.