Imaging lens assembly including seven lenses of ++−+−+− or ++−−−+− refractive powers, image capturing unit and electronic device

An imaging lens assembly includes seven lens elements which are, in order from an object side to an image side along an optical path: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. Each of the seven lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The second lens element has positive refractive power. The sixth lens element has positive refractive power, and the image-side surface of the sixth lens element is convex in a paraxial region thereof. The seventh lens element has negative refractive power. At least one of the object-side surface and the image-side surface of at least one lens element of the imaging lens assembly is aspheric and has at least one inflection point.

RELATED APPLICATIONS

This application claims priority to Taiwan Application 109119437, filed on Jun. 10, 2020, which is incorporated by reference herein in its entirety.

BACKGROUND

Technical Field

The present disclosure relates to an imaging lens assembly, an image capturing unit and an electronic device, more particularly to an imaging lens assembly and an image capturing unit applicable to an electronic device.

Description of Related Art

With the development of semiconductor manufacturing technology, the performance of image sensors has improved, and the pixel size thereof has been scaled down. Therefore, featuring high image quality becomes one of the indispensable features of an optical system nowadays.

Furthermore, due to the rapid changes in technology, electronic devices equipped with optical systems are trending towards multi-functionality for various applications, and therefore the functionality requirements for the optical systems have been increasing. However, it is difficult for a conventional optical system to obtain a balance among the requirements such as high image quality, low sensitivity, a proper aperture size, miniaturization and a desirable field of view.

SUMMARY

According to one aspect of the present disclosure, an imaging lens assembly includes seven lens elements. The seven lens elements are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. Each of the seven lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side.

The second lens element has positive refractive power, and the image-side surface of the second lens element is convex in a paraxial region thereof. The sixth lens element has positive refractive power, the object-side surface of the sixth lens element is convex in a paraxial region thereof, and the image-side surface of the sixth lens element is convex in a paraxial region thereof. The seventh lens element has negative refractive power, and the image-side surface of the seventh lens element is concave in a paraxial region thereof. At least one of the object-side surface and the image-side surface of at least one lens element of the imaging lens assembly is aspheric and has at least one inflection point.

When an Abbe number of the third lens element is V3, an Abbe number of the fourth lens element is V4, an Abbe number of the fifth lens element is V5, a central thickness of the first lens element is CT1, and a central thickness of the fifth lens element is CT5, the following conditions are satisfied:
30.0<V3+V4+V5<90.0; and
0.10<CT1/CT5<1.5.

According to another aspect of the present disclosure, an imaging lens assembly includes seven lens elements. The seven lens elements are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. Each of the seven lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side.

The second lens element has positive refractive power. The image-side surface of the third lens element is concave in a paraxial region thereof. The sixth lens element has positive refractive power, and the image-side surface of the sixth lens element is convex in a paraxial region thereof. The seventh lens element has negative refractive power. At least one of the object-side surface and the image-side surface of at least one lens element of the imaging lens assembly is aspheric and has at least one inflection point.

When an Abbe number of the third lens element is V3, an Abbe number of the fourth lens element is V4, an Abbe number of the fifth lens element is V5, a central thickness of the first lens element is CT1, a central thickness of the second lens element is CT2, and an axial distance between the first lens element and the second lens element is T12, the following conditions are satisfied:
30.0<V3+V4+V5<90.0; and
0.20<(CT1+CT2)/T12<6.5.

According to another aspect of the present disclosure, an imaging lens assembly includes seven lens elements. The seven lens elements are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. Each of the seven lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side.

The second lens element has positive refractive power, and the image-side surface of the second lens element is convex in a paraxial region thereof. The sixth lens element has positive refractive power, and the image-side surface of the sixth lens element is convex in a paraxial region thereof. The seventh lens element has negative refractive power. At least one of the object-side surface and the image-side surface of at least one lens element of the imaging lens assembly is aspheric and has at least one inflection point.

When an Abbe number of the third lens element is V3, an Abbe number of the fourth lens element is V4, an Abbe number of the fifth lens element is V5, a focal length of the imaging lens assembly is f, and a central thickness of the sixth lens element is CT6, the following conditions are satisfied:
30.0<V3+V4+V5<90.0; and
0.50<f/CT6<6.3.

According to another aspect of the present disclosure, an image capturing unit includes one of the aforementioned imaging lens assemblies and an image sensor, wherein the image sensor is disposed on an image surface of the imaging lens assembly.

According to another aspect of the present disclosure, an electronic device includes the aforementioned image capturing unit.

DETAILED DESCRIPTION

An imaging lens assembly includes seven lens elements. The seven lens elements are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. Each of the seven lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side.

The first lens element can have positive refractive power. Therefore, it is favorable for reducing the size of the object side of the imaging lens assembly. The object-side surface of the first lens element can be convex in a paraxial region thereof. Therefore, it is favorable for light in various fields of view to evenly enter the imaging lens assembly.

The second lens element has positive refractive power. Therefore, it is favorable for increasing the field of view and reducing the size. The image-side surface of the second lens element can be convex in a paraxial region thereof. Therefore, it is favorable for adjusting the light path, thereby increasing image quality on the periphery of the image surface.

The third lens element can have negative refractive power. Therefore, it is favorable for correcting aberrations such as spherical aberration generated due to size reduction. The image-side surface of the third lens element can be concave in a paraxial region thereof. Therefore, it is favorable for correcting aberrations such as astigmatism.

The object-side surface of the fourth lens element can be convex in a paraxial region thereof. Therefore, it is favorable for adjusting the surface shape of the fourth lens element, thereby properly arranging the size distribution between the object side and the image side of the imaging lens assembly. The image-side surface of the fourth lens element can be concave in a paraxial region thereof. Therefore, it is favorable for adjusting the surface shape of the fourth lens element, thereby obtaining a balance among the field of view, the overall size and the size of the image surface.

The fifth lens element can have negative refractive power. Therefore, it is favorable for balancing refractive power at the image side of the imaging lens assembly so as to reduce aberrations. The object-side surface of the fifth lens element can be concave in a paraxial region thereof. Therefore, it is favorable for adjusting the travelling direction of the light, thereby obtaining a balance among the field of view, the overall size and image quality.

The sixth lens element has positive refractive power. Therefore, it is favorable for properly distributing positive refractive power, thereby reducing the size and sensitivity. The object-side surface of the sixth lens element can be convex in a paraxial region thereof. Therefore, it is favorable for adjusting the surface shape and refractive power of the sixth lens element so as to correct aberrations. The image-side surface of the sixth lens element is convex in a paraxial region thereof. Therefore, it is favorable for adjusting the surface shape and refractive power of the sixth lens element, thereby increasing the field of view and the size of the image surface.

The seventh lens element has negative refractive power. Therefore, it is favorable for correcting aberrations such as spherical aberration and adjusting the back focal length to be in a proper range. The image-side surface of the seventh lens element can be concave in a paraxial region thereof. Therefore, it is favorable for adjusting the back focal length and correcting off-axis aberrations.

At least one of the object-side surface and the image-side surface of at least one lens element of the imaging lens assembly is aspheric and has at least one inflection point. Therefore, it is favorable for increasing the variation of lens surface, thereby reducing the lens size and improving image quality. Moreover, at least one of the object-side surface and the image-side surface of each of at least two lens elements of the imaging lens assembly can also be aspheric and have at least one inflection point. Moreover, at least one of the object-side surface and the image-side surface of each of at least three lens elements of the imaging lens assembly can also be aspheric and have at least one inflection point. Please refer toFIG. 27, which shows a schematic view of inflection points P of the lens elements according to the 1st embodiment of the present disclosure.

At least one of the object-side surface and the image-side surface of at least one lens element of the imaging lens assembly can have at least one critical point in an off-axis region thereof. Therefore, it is favorable for further increasing the variation of lens surface, thereby reducing the size of the imaging lens assembly, correcting off-axis aberrations and increasing the field of view and the size of the image surface. Moreover, at least one of the object-side surface and the image-side surface of each of at least two lens elements of the imaging lens assembly can also have at least one critical point in an off-axis region thereof. Please refer toFIG. 27, which shows a schematic view of critical points C of the lens elements according to the 1st embodiment of the present disclosure.

The object-side surface of the sixth lens element can have at least one critical point in an off-axis region thereof. Therefore, it is favorable for adjusting the surface shape of the sixth lens element so as to correct off-axis aberrations such as field curvature. When a vertical distance between the at least one critical point on the object-side surface of the sixth lens element and an optical axis is Yc61, and a maximum effective radius of the object-side surface of the sixth lens element is Y61, the following condition can be satisfied: 0.50<Yc61/Y61<0.80. Therefore, it is favorable for further adjusting the surface shape of the sixth lens element so as to further correct off-axis aberrations. Please refer toFIG. 27, which shows a schematic view of Yc61, Y61 and critical points C on the sixth lens element160according to the 1st embodiment of the present disclosure.

The image-side surface of the seventh lens element can have at least one critical point in an off-axis region thereof. Therefore, it is favorable for adjusting the light incident angle on the image surface so as to increase the response efficiency of the image sensor and the illuminance on the periphery of the image surface. When a vertical distance between the at least one critical point on the image-side surface of the seventh lens element and the optical axis is Yc72, and a maximum effective radius of the image-side surface of the seventh lens element is Y72, the following condition can be satisfied: 0.40<Yc72/Y72<0.75. Therefore, it is favorable for further adjusting the surface shape of the seventh lens element so as to increase the illuminance on the periphery of the image surface and improve image quality. Please refer toFIG. 27, which shows a schematic view of Yc72, Y72 and critical points C on the seventh lens element170according to the 1st embodiment of the present disclosure.

When an Abbe number of the third lens element is V3, an Abbe number of the fourth lens element is V4, and an Abbe number of the fifth lens element is V5, the following condition is satisfied: 30.0<V3+V4+V5<90.0. Therefore, it is favorable for the materials of the third through the fifth lens elements to collaborate with one another so as to correct aberrations such as chromatic aberration. Moreover, the following condition can also be satisfied: 45.0<V3+V4+V5<87.0. Moreover, the following condition can also be satisfied: 60.0<V3+V4+V5<84.0.

When a central thickness of the first lens element is CT1, and a central thickness of the fifth lens element is CT5, the following condition can be satisfied: 0.10<CT1/CT5<1.5. Therefore, it is favorable for adjusting the lens distribution so as to reduce the overall size, and it is also favorable for forming a wide field of view configuration. Moreover, the following condition can also be satisfied: 0.60<CT1/CT5<1.3. Moreover, the following condition can also be satisfied: 0.70<CT1/CT5<1.1.

When the central thickness of the first lens element is CT1, a central thickness of the second lens element is CT2, and an axial distance between the first lens element and the second lens element is T12, the following condition can be satisfied: 0.20<(CT1+CT2)/T12<6.5. Therefore, it is favorable for the first and the second lens elements to collaborate with each other so as to form a wide field of view configuration. Moreover, the following condition can also be satisfied: 1.5<(CT1+CT2)/T12<6.0. Moreover, the following condition can also be satisfied: 2.0<(CT1+CT2)/T12<5.5. Moreover, the following condition can also be satisfied: 2.6<(CT1+CT2)/T12<4.9.

When a focal length of the imaging lens assembly is f, and a central thickness of the sixth lens element is CT6, the following condition can be satisfied: 0.50<f/CT6<6.3. Therefore, it is favorable for adjusting the thickness and refractive power of the sixth lens element so as to adjust the field of view and reduce the size. Moreover, the following condition can also be satisfied: 3.1<f/CT6<5.8. Moreover, the following condition can also be satisfied: 3.9<f/CT6<5.3.

When the Abbe number of the third lens element is V3, the Abbe number of the fourth lens element is V4, the Abbe number of the fifth lens element is V5, an Abbe number of the sixth lens element is V6, and an Abbe number of the seventh lens element is V7, the following condition can be satisfied: 0.45<(V3+V4+V5)/(V6+V7)<0.80. Therefore, it is favorable for the materials of the third through the seventh lens elements to collaborate with one another so as to further correct aberrations such as chromatic aberration.

When the central thickness of the first lens element is CT1, and the axial distance between the first lens element and the second lens element is T12, the following condition can be satisfied: 0.10<CT1/T12<3.0. Therefore, it is favorable for the first and the second lens elements to collaborate with each other so as to increase the field of view. Moreover, the following condition can also be satisfied: 0.55<CT1/T12<2.3. Moreover, the following condition can also be satisfied: 0.90<CT1/T12<2.0.

When the axial distance between the first lens element and the second lens element is T12, and an axial distance between the sixth lens element and the seventh lens element is T67, the following condition can be satisfied: 0.60<T12/T67<2.2. Therefore, it is favorable for adjusting distances between the lens elements, thereby reducing the total track length and correcting aberrations.

When a maximum effective radius of the object-side surface of the first lens element is Y11, and a maximum effective radius of the image-side surface of the seventh lens element is Y72, the following condition can be satisfied: 0.20<Y11/Y72<0.50. Therefore, it is favorable for adjusting the proportion of outer diameters of the lens elements, thereby reducing the size at the object side of the imaging lens assembly and increasing the size of the image surface. Please refer toFIG. 27, which shows a schematic view of Y11 and Y72 according to the 1st embodiment of the present disclosure.

When a curvature radius of the object-side surface of the second lens element is R3, and a curvature radius of the image-side surface of the second lens element is R4, the following condition can be satisfied: |R4/R3|<1.50. Therefore, it is favorable for adjusting the surface shape of the second lens element, thereby reducing the size and increasing the field of view. Moreover, the following condition can also be satisfied: |R4/R3|<0.80. Moreover, the following condition can also be satisfied: |R4/R3|<0.60.

When a focal length of the imaging lens assembly is f, a curvature radius of the object-side surface of the sixth lens element is R11, and a curvature radius of the image-side surface of the sixth lens element is R12, the following condition can be satisfied: 2.0<f/|R11|+f/|R12|<8.0. Therefore, it is favorable for adjusting the surface shape and refractive power of the sixth lens element so as to reduce the total track length. Moreover, the following condition can also be satisfied: 3.0<f/|R11|+f/|R12|<6.0. Moreover, the following condition can also be satisfied: 3.5<f/|R11|+f/|R12|<5.0.

When a focal length of the sixth lens element is f6, and the central thickness of the sixth lens element is CT6, the following condition can be satisfied: 1.0<f6/CT6<2.5. Therefore, it is favorable for adjusting the thickness and refractive power of the sixth lens element so as to reduce the total track length.

When half of a maximum field of view of the imaging lens assembly is HFOV, the following condition can be satisfied: 42.5 [deg.]<HFOV<60.0 [deg.]. Therefore, it is favorable for the imaging lens assembly to have the characteristics of wide field of view, and it is also favorable for preventing aberrations such as distortion generated due to an overly large field of view. Moreover, the following condition can also be satisfied: 44.0 [deg.]<HFOV<52.5 [deg.].

When the focal length of the imaging lens assembly is f, and a curvature radius of the object-side surface of the first lens element is R1, the following condition can be satisfied: 1.20<f/R1<1.85. Therefore, it is favorable for adjusting the surface shape and refractive power of the first lens element, thereby reducing the size at the object side of the imaging lens assembly and increasing the field of view.

When the Abbe number of the third lens element is V3, the Abbe number of the fourth lens element is V4, the Abbe number of the fifth lens element is V5, and the Abbe number of the sixth lens element is V6, the following condition can be satisfied: 0.80<(V3+V4+V5)/V6<1.6. Therefore, it is favorable for the materials of the third to the sixth lens elements to collaborate with one another so as to further correct aberrations such chromatic aberration.

When a focal length of the second lens element is f2, and the focal length of the sixth lens element is f6, the following condition can be satisfied: 1.7<f2/f6<6.0. Therefore, it is favorable for adjusting refractive power distribution of the lens elements, thereby reducing the size and sensitivity. Moreover, the following condition can also be satisfied: 2.2<f2/f6<4.8.

When an axial distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element is TD, and an entrance pupil diameter of the imaging lens assembly is EPD, the following condition can be satisfied: 1.0<TD/EPD<4.0. Therefore, it is favorable for obtaining a balance between the size of the aperture stop and the size of the lens elements.

When a maximum image height of the imaging lens assembly (half of a diagonal length of an effective photosensitive area of an image sensor) is ImgH, and the focal length of the imaging lens assembly is f, the following condition can be satisfied: 0.80<ImgH/f<2.0. Therefore, it is favorable for obtaining a balance between the field of view and the size of the image surface. Moreover, the following condition can also be satisfied: 0.90<ImgH/f<1.5.

When an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, the Abbe number of the third lens element is V3, the Abbe number of the fourth lens element is V4, the Abbe number of the fifth lens element is V5, the Abbe number of the sixth lens element is V6, and the Abbe number of the seventh lens element is V7, the following condition can be satisfied: 2.5<(V1+V2+V6+V7)/(V3+V4+V5)<5.0. Therefore, it is favorable for adjusting material distribution of the lens elements so as to further correct aberrations such as chromatic aberration.

When a central thickness of the third lens element is CT3, a central thickness of the fourth lens element is CT4, and an axial distance between the third lens element and the fourth lens element is T34, the following condition can be satisfied: 0.50<(CT3+CT4)/T34<1.6. Therefore, it is favorable for adjusting the thicknesses of the third and fourth lens elements and the distance therebetween, thereby correcting aberrations.

When the axial distance between the third lens element and the fourth lens element is T34, and an axial distance between the fourth lens element and the fifth lens element is T45, the following condition can be satisfied: 1.0<T34/T45<3.2. Therefore, it is favorable for adjusting the distances between the lens elements so as to properly distribute the size at the object and image sides of the imaging lens assembly.

When the focal length of the imaging lens assembly is f, and a focal length of the fourth lens element is f4, the following condition can be satisfied: |f/f4|<0.45. Therefore, it is favorable for adjusting refractive power of the fourth lens element so as to properly distribute refractive power at the object and image sides of the imaging lens assembly.

When the central thickness of the sixth lens element is CT6, and the axial distance between the sixth lens element and the seventh lens element is T67, the following condition can be satisfied: 2.0<CT6/T67<8.0. Therefore, it is favorable for the sixth and the seventh lens elements to collaborate with each other so as to adjust the back focal length and correct aberrations.

When an f-number of the imaging lens assembly is Fno, the following condition can be satisfied: 1.0<Fno<2.5. Therefore, it is favorable for obtaining a balance between the depth of view and illuminance.

When an axial distance between the object-side surface of the first lens element and an image surface is TL, and the focal length of the imaging lens assembly is f, the following condition can be satisfied: 1.1<TL/f<3.0. Therefore, it is favorable for obtaining a balance between the total track length and the field of view. Moreover, the following condition can also be satisfied: 1.2<TL/f<2.0.

According to the present disclosure, the aforementioned features and conditions can be utilized in numerous combinations so as to achieve corresponding effects.

According to the present disclosure, the lens elements of the imaging lens assembly can be made of either glass or plastic material. When the lens elements are made of glass material, the refractive power distribution of the imaging lens assembly may be more flexible, and the influence on imaging caused by external environment temperature change may be reduced. The glass lens element can either be made by grinding or molding. When the lens elements are made of plastic material, the manufacturing costs can be effectively reduced. Furthermore, surfaces of each lens element can be arranged to be spherical or aspheric, wherein the former reduces manufacturing difficulty, and the latter allows more control variables for eliminating aberrations thereof, the required number of the lens elements can be reduced, and the total track length of the imaging lens assembly can be effectively shortened. Furthermore, the aspheric surfaces may be formed by plastic injection molding or glass molding.

According to the present disclosure, when a lens surface is aspheric, it means that the lens surface has an aspheric shape throughout its optically effective area, or a portion(s) thereof.

According to the present disclosure, one or more of the lens elements' material may optionally include an additive which alters the lens elements' transmittance in a specific range of wavelength for a reduction in unwanted stray light or colour deviation. For example, the additive may optionally filter out light in the wavelength range of 600 nm to 800 nm to reduce excessive red light and/or near infrared light; or may optionally filter out light in the wavelength range of 350 nm to 450 nm to reduce excessive blue light and/or near ultraviolet light from interfering the final image. The additive may be homogeneously mixed with a plastic material to be used in manufacturing a mixed-material lens element by injection molding.

According to the present disclosure, each of an object-side surface and an image-side surface has a paraxial region and an off-axis region. The paraxial region refers to the region of the surface where light rays travel close to the optical axis, and the off-axis region refers to the region of the surface away from the paraxial region. Particularly, unless otherwise stated, when the lens element has a convex surface, it indicates that the surface is convex in the paraxial region thereof; when the lens element has a concave surface, it indicates that the surface is concave in the paraxial region thereof. Moreover, when a region of refractive power or focus of a lens element is not defined, it indicates that the region of refractive power or focus of the lens element is in the paraxial region thereof.

According to the present disclosure, an inflection point is a point on the surface of the lens element at which the surface changes from concave to convex, or vice versa. A critical point is a non-axial point of the lens surface where its tangent is perpendicular to the optical axis.

According to the present disclosure, the image surface of the imaging lens assembly, based on the corresponding image sensor, can be flat or curved, especially a curved surface being concave facing towards the object side of the imaging lens assembly.

According to the present disclosure, an image correction unit, such as a field flattener, can be optionally disposed between the lens element closest to the image side of the imaging lens assembly along the optical path and the image surface for correction of aberrations such as field curvature. The optical properties of the image correction unit, such as curvature, thickness, index of refraction, position and surface shape (convex or concave surface with spherical, aspheric, diffractive or Fresnel types), can be adjusted according to the design of the image capturing unit. In general, a preferable image correction unit is, for example, a thin transparent element having a concave object-side surface and a planar image-side surface, and the thin transparent element is disposed near the image surface.

According to the present disclosure, at least one light-folding element, such as a prism or a mirror, can be optionally disposed between an imaged object and the image surface on the imaging optical path, such that the imaging lens assembly can be more flexible in space arrangement, and therefore the dimensions of an electronic device is not restricted by the total track length of the imaging lens assembly. Specifically, please refer toFIG. 28andFIG. 29.FIG. 28shows a schematic view of a configuration of a light-folding element in an imaging lens assembly according to one embodiment of the present disclosure, andFIG. 29shows a schematic view of another configuration of a light-folding element in an imaging lens assembly according to one embodiment of the present disclosure. InFIG. 28andFIG. 29, the imaging lens assembly can have, in order from an imaged object (not shown in the figures) to an image surface IM along an optical path, a first optical axis OA1, a light-folding element LF and a second optical axis OA2. The light-folding element LF can be disposed between the imaged object and a lens group LG of the imaging lens assembly as shown inFIG. 28or disposed between a lens group LG of the imaging lens assembly and the image surface IM as shown inFIG. 29. Furthermore, please refer toFIG. 30, which shows a schematic view of a configuration of two light-folding elements in an imaging lens assembly according to one embodiment of the present disclosure. InFIG. 30, the imaging lens assembly can have, in order from an imaged object (not shown in the figure) to an image surface IM along an optical path, a first optical axis OA1, a first light-folding element LF1, a second optical axis OA2, a second light-folding element LF2 and a third optical axis OA3. The first light-folding element LF1 is disposed between the imaged object and a lens group LG of the imaging lens assembly, the second light-folding element LF2 is disposed between the lens group LG of the imaging lens assembly and the image surface IM, and the travelling direction of light on the first optical axis OA1 can be the same direction as the travelling direction of light on the third optical axis OA3 as shown inFIG. 30. The imaging lens assembly can be optionally provided with three or more light-folding elements, and the present disclosure is not limited to the type, amount and position of the light-folding elements of the embodiments disclosed in the aforementioned figures.

According to the present disclosure, the imaging lens assembly can include at least one stop, such as an aperture stop, a glare stop or a field stop. Said glare stop or said field stop is set for eliminating the stray light and thereby improving image quality thereof.

According to the present disclosure, an aperture stop can be configured as a front stop or a middle stop. A front stop disposed between an imaged object and the first lens element can provide a longer distance between an exit pupil of the imaging lens assembly and the image surface to produce a telecentric effect, and thereby improves the image-sensing efficiency of an image sensor (for example, CCD or CMOS). A middle stop disposed between the first lens element and the image surface is favorable for enlarging the viewing angle of the imaging lens assembly and thereby provides a wider field of view for the same.

According to the present disclosure, the imaging lens assembly can include an aperture control unit. The aperture control unit may be a mechanical component or a light modulator, which can control the size and shape of the aperture through electricity or electrical signals. The mechanical component can include a movable member, such as a blade assembly or a light shielding sheet. The light modulator can include a shielding element, such as a filter, an electrochromic material or a liquid-crystal layer. The aperture control unit controls the amount of incident light or exposure time to enhance the capability of image quality adjustment. In addition, the aperture control unit can be the aperture stop of the present disclosure, which changes the f-number to obtain different image effects, such as the depth of field or lens speed.

FIG. 1is a schematic view of an image capturing unit according to the 1st embodiment of the present disclosure.FIG. 2shows, in order from left to right, spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 1st embodiment. InFIG. 1, the image capturing unit includes the imaging lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor195. The imaging lens assembly includes, in order from an object side to an image side along an optical path, a first lens element110, an aperture stop100, a second lens element120, a stop101, a third lens element130, a fourth lens element140, a fifth lens element150, a sixth lens element160, a seventh lens element170, a filter180and an image surface190. The imaging lens assembly includes seven lens elements (110,120,130,140,150,160and170) with no additional lens element disposed between each of the adjacent seven lens elements.

The first lens element110with positive refractive power has an object-side surface111being convex in a paraxial region thereof and an image-side surface112being concave in a paraxial region thereof. The first lens element110is made of plastic material and has the object-side surface111and the image-side surface112being both aspheric. The image-side surface112of the first lens element110has two inflection points.

The second lens element120with positive refractive power has an object-side surface121being convex in a paraxial region thereof and an image-side surface122being convex in a paraxial region thereof. The second lens element120is made of plastic material and has the object-side surface121and the image-side surface122being both aspheric. The object-side surface121of the second lens element120has two inflection points. The image-side surface122of the second lens element120has one inflection point. The object-side surface121of the second lens element120has one critical point in an off-axis region thereof.

The third lens element130with negative refractive power has an object-side surface131being convex in a paraxial region thereof and an image-side surface132being concave in a paraxial region thereof. The third lens element130is made of plastic material and has the object-side surface131and the image-side surface132being both aspheric. The object-side surface131of the third lens element130has one inflection point. The image-side surface132of the third lens element130has two inflection points. The object-side surface131of the third lens element130has one critical point in an off-axis region thereof. The image-side surface132of the third lens element130has one critical point in an off-axis region thereof.

The fourth lens element140with positive refractive power has an object-side surface141being convex in a paraxial region thereof and an image-side surface142being concave in a paraxial region thereof. The fourth lens element140is made of plastic material and has the object-side surface141and the image-side surface142being both aspheric. The object-side surface141of the fourth lens element140has two inflection points. The image-side surface142of the fourth lens element140has two inflection points. The object-side surface141of the fourth lens element140has one critical point in an off-axis region thereof. The image-side surface142of the fourth lens element140has one critical point in an off-axis region thereof.

The fifth lens element150with negative refractive power has an object-side surface151being concave in a paraxial region thereof and an image-side surface152being convex in a paraxial region thereof. The fifth lens element150is made of plastic material and has the object-side surface151and the image-side surface152being both aspheric. The object-side surface151of the fifth lens element150has two inflection points. The image-side surface152of the fifth lens element150has three inflection points.

The sixth lens element160with positive refractive power has an object-side surface161being convex in a paraxial region thereof and an image-side surface162being convex in a paraxial region thereof. The sixth lens element160is made of plastic material and has the object-side surface161and the image-side surface162being both aspheric. The object-side surface161of the sixth lens element160has three inflection points. The image-side surface162of the sixth lens element160has four inflection points. The object-side surface161of the sixth lens element160has one critical point in an off-axis region thereof. The image-side surface162of the sixth lens element160has two critical points in an off-axis region thereof.

The seventh lens element170with negative refractive power has an object-side surface171being concave in a paraxial region thereof and an image-side surface172being concave in a paraxial region thereof. The seventh lens element170is made of plastic material and has the object-side surface171and the image-side surface172being both aspheric. The object-side surface171of the seventh lens element170has three inflection points. The image-side surface172of the seventh lens element170has two inflection points. The object-side surface171of the seventh lens element170has one critical point in an off-axis region thereof. The image-side surface172of the seventh lens element170has one critical point in an off-axis region thereof.

The filter180is made of glass material and located between the seventh lens element170and the image surface190, and will not affect the focal length of the imaging lens assembly. The image sensor195is disposed on or near the image surface190of the imaging lens assembly.

X is the displacement in parallel with an optical axis from the intersection point of the aspheric surface and the optical axis to a point at a distance of Y from the optical axis on the aspheric surface;

Y is the vertical distance from the point on the aspheric surface to the optical axis;

R is the curvature radius;

k is the conic coefficient; and

In the imaging lens assembly of the image capturing unit according to the 1st embodiment, when a focal length of the imaging lens assembly is f, an f-number of the imaging lens assembly is Fno, and half of a maximum field of view of the imaging lens assembly is HFOV, these parameters have the following values: f=4.94 millimeters (mm), Fno=1.82, HFOV=45.9 degrees (deg.).

When an Abbe number of the first lens element110is V1, an Abbe number of the second lens element120is V2, an Abbe number of the third lens element130is V3, an Abbe number of the fourth lens element140is V4, an Abbe number of the fifth lens element150is V5, an Abbe number of the sixth lens element160is V6, and an Abbe number of the seventh lens element170is V7, the following conditions are satisfied: (V1+V2+V6+V7)/(V3+V4+V5)=2.82; V3+V4+V5=79.4; (V3+V4+V5)/V6=1.42; and (V3+V4+V5)/(V6+V7)=0.71.

When a central thickness of the first lens element110is CT1, and a central thickness of the fifth lens element150is CT5, the following condition is satisfied: CT1/CT5=1.03.

When the central thickness of the first lens element110is CT1, and an axial distance between the first lens element110and the second lens element120is T12, the following condition is satisfied: CT1/T12=1.49. In this embodiment, an axial distance between two adjacent lens elements is a distance in a paraxial region between two adjacent lens surfaces of the two adjacent lens elements.

When the central thickness of the first lens element110is CT1, a central thickness of the second lens element120is CT2, and the axial distance between the first lens element110and the second lens element120is T12, the following condition is satisfied: (CT1+CT2)/T12=3.16.

When a central thickness of the third lens element130is CT3, a central thickness of the fourth lens element140is CT4, and an axial distance between the third lens element130and the fourth lens element140is T34, the following condition is satisfied: (CT3+CT4)/T34=1.33.

When a central thickness of the sixth lens element160is CT6, and an axial distance between the sixth lens element160and the seventh lens element170is T67, the following condition is satisfied: CT6/T67=3.61.

When the axial distance between the first lens element110and the second lens element120is T12, and the axial distance between the sixth lens element160and the seventh lens element170is T67, the following condition is satisfied: T12/T67=1.31.

When the axial distance between the third lens element130and the fourth lens element140is T34, and an axial distance between the fourth lens element140and the fifth lens element150is T45, the following condition is satisfied: T34/T45=1.22.

When an axial distance between the object-side surface111of the first lens element110and the image-side surface172of the seventh lens element170is TD, and an entrance pupil diameter of the imaging lens assembly is EPD, the following condition is satisfied: TD/EPD=2.06.

When an axial distance between the object-side surface111of the first lens element110and the image surface190is TL, and the focal length of the imaging lens assembly is f, the following condition is satisfied: TL/f=1.43.

When a curvature radius of the object-side surface121of the second lens element120is R3, and a curvature radius of the image-side surface122of the second lens element120is R4, the following condition is satisfied: |R4/R3|=0.26.

When the focal length of the imaging lens assembly is f, and the central thickness of the sixth lens element160is CT6, the following condition is satisfied: f/CT6=4.78.

When the focal length of the imaging lens assembly is f, and a focal length of the fourth lens element140is f4, the following condition is satisfied: |f/f4|=0.04.

When the focal length of the imaging lens assembly is f, and a curvature radius of the object-side surface111of the first lens element110is R1, the following condition is satisfied: f/R1=1.60.

When the focal length of the imaging lens assembly is f, a curvature radius of the object-side surface161of the sixth lens element160is R11, and a curvature radius of the image-side surface162of the sixth lens element160is R12, the following condition is satisfied: f/|R11|+f/|R12|=4.33.

When a focal length of the second lens element120is f2, and a focal length of the sixth lens element160is f6, the following condition is satisfied: f2/f6=3.19.

When the focal length of the sixth lens element160is f6, and the central thickness of the sixth lens element160is CT6, the following condition is satisfied: f6/CT6=2.18.

When a maximum image height of the imaging lens assembly is ImgH, and the focal length of the imaging lens assembly is f, the following condition is satisfied: ImgH/f=1.06.

When a maximum effective radius of the object-side surface111of the first lens element110is Y11, and a maximum effective radius of the image-side surface172of the seventh lens element170is Y72, the following condition is satisfied: Y11/Y72=0.38.

When a vertical distance between a non-axial critical point on the object-side surface161of the sixth lens element160and the optical axis is Yc61, and a maximum effective radius of the object-side surface161of the sixth lens element160is Y61, the following condition is satisfied: Yc61/Y61=0.66.

When a vertical distance between a non-axial critical point on the image-side surface172of the seventh lens element170and the optical axis is Yc72, and the maximum effective radius of the image-side surface172of the seventh lens element170is Y72, the following condition is satisfied: Yc72/Y72=0.55.

FIG. 3is a schematic view of an image capturing unit according to the 2nd embodiment of the present disclosure.FIG. 4shows, in order from left to right, spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 2nd embodiment. InFIG. 3, the image capturing unit includes the imaging lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor295. The imaging lens assembly includes, in order from an object side to an image side along an optical path, a first lens element210, an aperture stop200, a second lens element220, a stop201, a third lens element230, a fourth lens element240, a fifth lens element250, a sixth lens element260, a seventh lens element270, a filter280and an image surface290. The imaging lens assembly includes seven lens elements (210,220,230,240,250,260and270) with no additional lens element disposed between each of the adjacent seven lens elements.

The first lens element210with positive refractive power has an object-side surface211being convex in a paraxial region thereof and an image-side surface212being concave in a paraxial region thereof. The first lens element210is made of plastic material and has the object-side surface211and the image-side surface212being both aspheric. The object-side surface211of the first lens element210has two inflection points. The image-side surface212of the first lens element210has two inflection points.

The second lens element220with positive refractive power has an object-side surface221being concave in a paraxial region thereof and an image-side surface222being convex in a paraxial region thereof. The second lens element220is made of plastic material and has the object-side surface221and the image-side surface222being both aspheric. The object-side surface221of the second lens element220has one inflection point.

The third lens element230with negative refractive power has the object-side surface231being convex in a paraxial region thereof and an image-side surface232being concave in a paraxial region thereof. The third lens element230is made of plastic material and has the object-side surface231and the image-side surface232being both aspheric. The object-side surface231of the third lens element230has one inflection point. The image-side surface232of the third lens element230has one inflection point. The object-side surface231of the third lens element230has one critical point in an off-axis region thereof. The image-side surface232of the third lens element230has one critical point in an off-axis region thereof.

The fourth lens element240with positive refractive power has an object-side surface241being convex in a paraxial region thereof and an image-side surface242being concave in a paraxial region thereof. The fourth lens element240is made of plastic material and has the object-side surface241and the image-side surface242being both aspheric. The object-side surface241of the fourth lens element240has one inflection point. The image-side surface242of the fourth lens element240has two inflection points. The object-side surface241of the fourth lens element240has one critical point in an off-axis region thereof. The image-side surface242of the fourth lens element240has one critical point in an off-axis region thereof.

The fifth lens element250with negative refractive power has an object-side surface251being concave in a paraxial region thereof and an image-side surface252being concave in a paraxial region thereof. The fifth lens element250is made of plastic material and has the object-side surface251and the image-side surface252being both aspheric. The object-side surface251of the fifth lens element250has two inflection points. The image-side surface252of the fifth lens element250has two inflection points. The image-side surface252of the fifth lens element250has two critical points in an off-axis region thereof.

The sixth lens element260with positive refractive power has an object-side surface261being convex in a paraxial region thereof and an image-side surface262being convex in a paraxial region thereof. The sixth lens element260is made of plastic material and has the object-side surface261and the image-side surface262being both aspheric. The object-side surface261of the sixth lens element260has two inflection points. The image-side surface262of the sixth lens element260has four inflection points. The object-side surface261of the sixth lens element260has one critical point in an off-axis region thereof. The image-side surface262of the sixth lens element260has two critical points in an off-axis region thereof.

The seventh lens element270with negative refractive power has an object-side surface271being convex in a paraxial region thereof and an image-side surface272being concave in a paraxial region thereof. The seventh lens element270is made of plastic material and has the object-side surface271and the image-side surface272being both aspheric. The object-side surface271of the seventh lens element270has two inflection points. The image-side surface272of the seventh lens element270has two inflection points. The object-side surface271of the seventh lens element270has two critical points in an off-axis region thereof. The image-side surface272of the seventh lens element270has one critical point in an off-axis region thereof.

The filter280is made of glass material and located between the seventh lens element270and the image surface290, and will not affect the focal length of the imaging lens assembly. The image sensor295is disposed on or near the image surface290of the imaging lens assembly.

FIG. 5is a schematic view of an image capturing unit according to the 3rd embodiment of the present disclosure.FIG. 6shows, in order from left to right, spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 3rd embodiment. InFIG. 5, the image capturing unit includes the imaging lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor395. The imaging lens assembly includes, in order from an object side to an image side along an optical path, a first lens element310, an aperture stop300, a second lens element320, a stop301, a third lens element330, a fourth lens element340, a fifth lens element350, a sixth lens element360, a seventh lens element370, a filter380and an image surface390. The imaging lens assembly includes seven lens elements (310,320,330,340,350,360and370) with no additional lens element disposed between each of the adjacent seven lens elements.

The first lens element310with positive refractive power has an object-side surface311being convex in a paraxial region thereof and an image-side surface312being concave in a paraxial region thereof. The first lens element310is made of plastic material and has the object-side surface311and the image-side surface312being both aspheric. The object-side surface311of the first lens element310has two inflection points. The image-side surface312of the first lens element310has two inflection points.

The second lens element320with positive refractive power has an object-side surface321being convex in a paraxial region thereof and an image-side surface322being convex in a paraxial region thereof. The second lens element320is made of plastic material and has the object-side surface321and the image-side surface322being both aspheric. The object-side surface321of the second lens element320has two inflection points.

The third lens element330with negative refractive power has an object-side surface331being convex in a paraxial region thereof and an image-side surface332being concave in a paraxial region thereof. The third lens element330is made of plastic material and has the object-side surface331and the image-side surface332being both aspheric. The object-side surface331of the third lens element330has one inflection point. The image-side surface332of the third lens element330has one inflection point. The object-side surface331of the third lens element330has one critical point in an off-axis region thereof. The image-side surface332of the third lens element330has one critical point in an off-axis region thereof.

The fourth lens element340with negative refractive power has an object-side surface341being convex in a paraxial region thereof and an image-side surface342being concave in a paraxial region thereof. The fourth lens element340is made of plastic material and has the object-side surface341and the image-side surface342being both aspheric. The object-side surface341of the fourth lens element340has one inflection point. The image-side surface342of the fourth lens element340has two inflection points. The object-side surface341of the fourth lens element340has one critical point in an off-axis region thereof. The image-side surface342of the fourth lens element340has one critical point in an off-axis region thereof.

The fifth lens element350with negative refractive power has an object-side surface351being concave in a paraxial region thereof and an image-side surface352being convex in a paraxial region thereof. The fifth lens element350is made of plastic material and has the object-side surface351and the image-side surface352being both aspheric. The object-side surface351of the fifth lens element350has two inflection points. The image-side surface352of the fifth lens element350has one inflection point.

The sixth lens element360with positive refractive power has an object-side surface361being convex in a paraxial region thereof and an image-side surface362being convex in a paraxial region thereof. The sixth lens element360is made of plastic material and has the object-side surface361and the image-side surface362being both aspheric. The object-side surface361of the sixth lens element360has two inflection points. The image-side surface362of the sixth lens element360has four inflection points. The object-side surface361of the sixth lens element360has one critical point in an off-axis region thereof.

The seventh lens element370with negative refractive power has an object-side surface371being convex in a paraxial region thereof and an image-side surface372being concave in a paraxial region thereof. The seventh lens element370is made of plastic material and has the object-side surface371and the image-side surface372being both aspheric. The object-side surface371of the seventh lens element370has two inflection points. The image-side surface372of the seventh lens element370has two inflection points. The object-side surface371of the seventh lens element370has two critical points in an off-axis region thereof. The image-side surface372of the seventh lens element370has one critical point in an off-axis region thereof.

The filter380is made of glass material and located between the seventh lens element370and the image surface390, and will not affect the focal length of the imaging lens assembly. The image sensor395is disposed on or near the image surface390of the imaging lens assembly.

FIG. 7is a schematic view of an image capturing unit according to the 4th embodiment of the present disclosure.FIG. 8shows, in order from left to right, spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 4th embodiment. InFIG. 7, the image capturing unit includes the imaging lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor495. The imaging lens assembly includes, in order from an object side to an image side along an optical path, a first lens element410, an aperture stop400, a second lens element420, a stop401, a third lens element430, a fourth lens element440, a fifth lens element450, a sixth lens element460, a seventh lens element470, a filter480and an image surface490. The imaging lens assembly includes seven lens elements (410,420,430,440,450,460and470) with no additional lens element disposed between each of the adjacent seven lens elements.

The first lens element410with positive refractive power has an object-side surface411being convex in a paraxial region thereof and an image-side surface412being concave in a paraxial region thereof. The first lens element410is made of plastic material and has the object-side surface411and the image-side surface412being both aspheric. The object-side surface411of the first lens element410has two inflection points. The image-side surface412of the first lens element410has two inflection points.

The second lens element420with positive refractive power has an object-side surface421being convex in a paraxial region thereof and an image-side surface422being convex in a paraxial region thereof. The second lens element420is made of plastic material and has the object-side surface421and the image-side surface422being both aspheric. The object-side surface421of the second lens element420has two inflection points.

The third lens element430with negative refractive power has an object-side surface431being convex in a paraxial region thereof and an image-side surface432being concave in a paraxial region thereof. The third lens element430is made of plastic material and has the object-side surface431and the image-side surface432being both aspheric. The object-side surface431of the third lens element430has one inflection point. The image-side surface432of the third lens element430has one inflection point. The object-side surface431of the third lens element430has one critical point in an off-axis region thereof. The image-side surface432of the third lens element430has one critical point in an off-axis region thereof.

The fourth lens element440with positive refractive power has an object-side surface441being convex in a paraxial region thereof and an image-side surface442being concave in a paraxial region thereof. The fourth lens element440is made of plastic material and has the object-side surface441and the image-side surface442being both aspheric. The object-side surface441of the fourth lens element440has one inflection point. The image-side surface442of the fourth lens element440has two inflection points. The object-side surface441of the fourth lens element440has one critical point in an off-axis region thereof. The image-side surface442of the fourth lens element440has one critical point in an off-axis region thereof.

The fifth lens element450with negative refractive power has an object-side surface451being concave in a paraxial region thereof and an image-side surface452being concave in a paraxial region thereof. The fifth lens element450is made of plastic material and has the object-side surface451and the image-side surface452being both aspheric. The object-side surface451of the fifth lens element450has two inflection points. The image-side surface452of the fifth lens element450has three inflection points. The image-side surface452of the fifth lens element450has one critical point in an off-axis region thereof.

The sixth lens element460with positive refractive power has an object-side surface461being convex in a paraxial region thereof and an image-side surface462being convex in a paraxial region thereof. The sixth lens element460is made of plastic material and has the object-side surface461and the image-side surface462being both aspheric. The object-side surface461of the sixth lens element460has three inflection points. The image-side surface462of the sixth lens element460has four inflection points. The object-side surface461of the sixth lens element460has one critical point in an off-axis region thereof. The image-side surface462of the sixth lens element460has two critical points in an off-axis region thereof.

The seventh lens element470with negative refractive power has an object-side surface471being convex in a paraxial region thereof and an image-side surface472being concave in a paraxial region thereof. The seventh lens element470is made of plastic material and has the object-side surface471and the image-side surface472being both aspheric. The object-side surface471of the seventh lens element470has two inflection points. The image-side surface472of the seventh lens element470has two inflection points. The object-side surface471of the seventh lens element470has two critical points in an off-axis region thereof. The image-side surface472of the seventh lens element470has one critical point in an off-axis region thereof.

The filter480is made of glass material and located between the seventh lens element470and the image surface490, and will not affect the focal length of the imaging lens assembly. The image sensor495is disposed on or near the image surface490of the imaging lens assembly.

FIG. 9is a schematic view of an image capturing unit according to the 5th embodiment of the present disclosure.FIG. 10shows, in order from left to right, spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 5th embodiment. InFIG. 9, the image capturing unit includes the imaging lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor595. The imaging lens assembly includes, in order from an object side to an image side along an optical path, a first lens element510, an aperture stop500, a second lens element520, a stop501, a third lens element530, a fourth lens element540, a fifth lens element550, a sixth lens element560, a seventh lens element570, a filter580and an image surface590. The imaging lens assembly includes seven lens elements (510,520,530,540,550,560and570) with no additional lens element disposed between each of the adjacent seven lens elements.

The first lens element510with positive refractive power has an object-side surface511being convex in a paraxial region thereof and an image-side surface512being concave in a paraxial region thereof. The first lens element510is made of plastic material and has the object-side surface511and the image-side surface512being both aspheric. The object-side surface511of the first lens element510has two inflection points. The image-side surface512of the first lens element510has two inflection points.

The second lens element520with positive refractive power has an object-side surface521being convex in a paraxial region thereof and an image-side surface522being convex in a paraxial region thereof. The second lens element520is made of plastic material and has the object-side surface521and the image-side surface522being both aspheric. The object-side surface521of the second lens element520has two inflection points. The object-side surface521of the second lens element520has two critical points in an off-axis region thereof.

The third lens element530with negative refractive power has an object-side surface531being convex in a paraxial region thereof and an image-side surface532being concave in a paraxial region thereof. The third lens element530is made of plastic material and has the object-side surface531and the image-side surface532being both aspheric. The object-side surface531of the third lens element530has one inflection point. The image-side surface532of the third lens element530has one inflection point. The object-side surface531of the third lens element530has one critical point in an off-axis region thereof. The image-side surface532of the third lens element530has one critical point in an off-axis region thereof.

The fourth lens element540with negative refractive power has an object-side surface541being convex in a paraxial region thereof and an image-side surface542being concave in a paraxial region thereof. The fourth lens element540is made of plastic material and has the object-side surface541and the image-side surface542being both aspheric. The object-side surface541of the fourth lens element540has one inflection point. The image-side surface542of the fourth lens element540has two inflection points. The object-side surface541of the fourth lens element540has one critical point in an off-axis region thereof. The image-side surface542of the fourth lens element540has one critical point in an off-axis region thereof.

The fifth lens element550with negative refractive power has an object-side surface551being concave in a paraxial region thereof and an image-side surface552being concave in a paraxial region thereof. The fifth lens element550is made of plastic material and has the object-side surface551and the image-side surface552being both aspheric. The object-side surface551of the fifth lens element550has two inflection points. The image-side surface552of the fifth lens element550has three inflection points. The image-side surface552of the fifth lens element550has one critical point in an off-axis region thereof.

The sixth lens element560with positive refractive power has an object-side surface561being convex in a paraxial region thereof and an image-side surface562being convex in a paraxial region thereof. The sixth lens element560is made of plastic material and has the object-side surface561and the image-side surface562being both aspheric. The object-side surface561of the sixth lens element560has three inflection points. The image-side surface562of the sixth lens element560has four inflection points. The object-side surface561of the sixth lens element560has one critical point in an off-axis region thereof. The image-side surface562of the sixth lens element560has two critical points in an off-axis region thereof.

The seventh lens element570with negative refractive power has an object-side surface571being convex in a paraxial region thereof and an image-side surface572being concave in a paraxial region thereof. The seventh lens element570is made of plastic material and has the object-side surface571and the image-side surface572being both aspheric. The object-side surface571of the seventh lens element570has three inflection points. The image-side surface572of the seventh lens element570has two inflection points. The object-side surface571of the seventh lens element570has three critical points in an off-axis region thereof. The image-side surface572of the seventh lens element570has one critical point in an off-axis region thereof.

The filter580is made of glass material and located between the seventh lens element570and the image surface590, and will not affect the focal length of the imaging lens assembly. The image sensor595is disposed on or near the image surface590of the imaging lens assembly.

FIG. 11is a schematic view of an image capturing unit according to the 6th embodiment of the present disclosure.FIG. 12shows, in order from left to right, spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 6th embodiment. InFIG. 11, the image capturing unit includes the imaging lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor695. The imaging lens assembly includes, in order from an object side to an image side along an optical path, a first lens element610, an aperture stop600, a second lens element620, a stop601, a third lens element630, a fourth lens element640, a fifth lens element650, a sixth lens element660, a seventh lens element670, a filter680and an image surface690. The imaging lens assembly includes seven lens elements (610,620,630,640,650,660and670) with no additional lens element disposed between each of the adjacent seven lens elements.

The first lens element610with positive refractive power has an object-side surface611being convex in a paraxial region thereof and an image-side surface612being concave in a paraxial region thereof. The first lens element610is made of plastic material and has the object-side surface611and the image-side surface612being both aspheric. The image-side surface612of the first lens element610has two inflection points.

The second lens element620with positive refractive power has an object-side surface621being convex in a paraxial region thereof and an image-side surface622being convex in a paraxial region thereof. The second lens element620is made of plastic material and has the object-side surface621and the image-side surface622being both aspheric. The object-side surface621of the second lens element620has two inflection points. The object-side surface621of the second lens element620has one critical point in an off-axis region thereof.

The third lens element630with negative refractive power has an object-side surface631being convex in a paraxial region thereof and an image-side surface632being concave in a paraxial region thereof. The third lens element630is made of plastic material and has the object-side surface631and the image-side surface632being both aspheric. The object-side surface631of the third lens element630has one inflection point. The image-side surface632of the third lens element630has one inflection point. The object-side surface631of the third lens element630has one critical point in an off-axis region thereof. The image-side surface632of the third lens element630has one critical point in an off-axis region thereof.

The fourth lens element640with positive refractive power has an object-side surface641being convex in a paraxial region thereof and an image-side surface642being concave in a paraxial region thereof. The fourth lens element640is made of plastic material and has the object-side surface641and the image-side surface642being both aspheric. The object-side surface641of the fourth lens element640has one inflection point. The image-side surface642of the fourth lens element640has two inflection points. The object-side surface641of the fourth lens element640has one critical point in an off-axis region thereof. The image-side surface642of the fourth lens element640has one critical point in an off-axis region thereof.

The fifth lens element650with negative refractive power has an object-side surface651being concave in a paraxial region thereof and an image-side surface652being concave in a paraxial region thereof. The fifth lens element650is made of plastic material and has the object-side surface651and the image-side surface652being both aspheric. The object-side surface651of the fifth lens element650has two inflection points. The image-side surface652of the fifth lens element650has three inflection points. The image-side surface652of the fifth lens element650has one critical point in an off-axis region thereof.

The sixth lens element660with positive refractive power has an object-side surface661being convex in a paraxial region thereof and an image-side surface662being convex in a paraxial region thereof. The sixth lens element660is made of plastic material and has the object-side surface661and the image-side surface662being both aspheric. The object-side surface661of the sixth lens element660has three inflection points. The image-side surface662of the sixth lens element660has four inflection points. The object-side surface661of the sixth lens element660has one critical point in an off-axis region thereof. The image-side surface662of the sixth lens element660has two critical points in an off-axis region thereof.

The seventh lens element670with negative refractive power has an object-side surface671being concave in a paraxial region thereof and an image-side surface672being concave in a paraxial region thereof. The seventh lens element670is made of plastic material and has the object-side surface671and the image-side surface672being both aspheric. The object-side surface671of the seventh lens element670has one inflection point. The image-side surface672of the seventh lens element670has two inflection points. The object-side surface671of the seventh lens element670has one critical point in an off-axis region thereof. The image-side surface672of the seventh lens element670has one critical point in an off-axis region thereof.

The filter680is made of glass material and located between the seventh lens element670and the image surface690, and will not affect the focal length of the imaging lens assembly. The image sensor695is disposed on or near the image surface690of the imaging lens assembly.

FIG. 13is a schematic view of an image capturing unit according to the 7th embodiment of the present disclosure.FIG. 14shows, in order from left to right, spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 7th embodiment. InFIG. 13, the image capturing unit includes the imaging lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor795. The imaging lens assembly includes, in order from an object side to an image side along an optical path, a first lens element710, an aperture stop700, a second lens element720, a stop701, a third lens element730, a fourth lens element740, a stop702, a fifth lens element750, a sixth lens element760, a seventh lens element770, a filter780and an image surface790. The imaging lens assembly includes seven lens elements (710,720,730,740,750,760and770) with no additional lens element disposed between each of the adjacent seven lens elements.

The first lens element710with positive refractive power has an object-side surface711being convex in a paraxial region thereof and an image-side surface712being concave in a paraxial region thereof. The first lens element710is made of plastic material and has the object-side surface711and the image-side surface712being both aspheric. The object-side surface711of the first lens element710has two inflection points. The image-side surface712of the first lens element710has two inflection points.

The second lens element720with positive refractive power has an object-side surface721being convex in a paraxial region thereof and an image-side surface722being convex in a paraxial region thereof. The second lens element720is made of plastic material and has the object-side surface721and the image-side surface722being both aspheric. The object-side surface721of the second lens element720has two inflection points. The object-side surface721of the second lens element720has one critical point in an off-axis region thereof.

The third lens element730with negative refractive power has an object-side surface731being convex in a paraxial region thereof and an image-side surface732being concave in a paraxial region thereof. The third lens element730is made of plastic material and has the object-side surface731and the image-side surface732being both aspheric. The object-side surface731of the third lens element730has two inflection points. The image-side surface732of the third lens element730has two inflection points. The object-side surface731of the third lens element730has one critical point in an off-axis region thereof.

The fourth lens element740with negative refractive power has an object-side surface741being convex in a paraxial region thereof and an image-side surface742being concave in a paraxial region thereof. The fourth lens element740is made of plastic material and has the object-side surface741and the image-side surface742being both aspheric. The object-side surface741of the fourth lens element740has two inflection points. The image-side surface742of the fourth lens element740has two inflection points. The object-side surface741of the fourth lens element740has one critical point in an off-axis region thereof. The image-side surface742of the fourth lens element740has one critical point in an off-axis region thereof.

The fifth lens element750with negative refractive power has an object-side surface751being concave in a paraxial region thereof and an image-side surface752being concave in a paraxial region thereof. The fifth lens element750is made of plastic material and has the object-side surface751and the image-side surface752being both aspheric. The object-side surface751of the fifth lens element750has two inflection points. The image-side surface752of the fifth lens element750has two inflection points. The image-side surface752of the fifth lens element750has one critical point in an off-axis region thereof.

The sixth lens element760with positive refractive power has an object-side surface761being convex in a paraxial region thereof and an image-side surface762being convex in a paraxial region thereof. The sixth lens element760is made of plastic material and has the object-side surface761and the image-side surface762being both aspheric. The object-side surface761of the sixth lens element760has two inflection points. The image-side surface762of the sixth lens element760has three inflection points. The object-side surface761of the sixth lens element760has one critical point in an off-axis region thereof. The image-side surface762of the sixth lens element760has two critical points in an off-axis region thereof.

The seventh lens element770with negative refractive power has an object-side surface771being concave in a paraxial region thereof and an image-side surface772being concave in a paraxial region thereof. The seventh lens element770is made of plastic material and has the object-side surface771and the image-side surface772being both aspheric. The object-side surface771of the seventh lens element770has three inflection points. The image-side surface772of the seventh lens element770has two inflection points. The object-side surface771of the seventh lens element770has one critical point in an off-axis region thereof. The image-side surface772of the seventh lens element770has one critical point in an off-axis region thereof.

The filter780is made of glass material and located between the seventh lens element770and the image surface790, and will not affect the focal length of the imaging lens assembly. The image sensor795is disposed on or near the image surface790of the imaging lens assembly.

FIG. 15is a schematic view of an image capturing unit according to the 8th embodiment of the present disclosure.FIG. 16shows, in order from left to right, spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 8th embodiment. InFIG. 15, the image capturing unit includes the imaging lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor895. The imaging lens assembly includes, in order from an object side to an image side along an optical path, a first lens element810, an aperture stop800, a second lens element820, a stop801, a third lens element830, a fourth lens element840, a stop802, a fifth lens element850, a sixth lens element860, a seventh lens element870, a filter880and an image surface890. The imaging lens assembly includes seven lens elements (810,820,830,840,850,860and870) with no additional lens element disposed between each of the adjacent seven lens elements.

The first lens element810with positive refractive power has an object-side surface811being convex in a paraxial region thereof and an image-side surface812being concave in a paraxial region thereof. The first lens element810is made of plastic material and has the object-side surface811and the image-side surface812being both aspheric. The object-side surface811of the first lens element810has two inflection points. The image-side surface812of the first lens element810has two inflection points.

The second lens element820with positive refractive power has an object-side surface821being concave in a paraxial region thereof and an image-side surface822being convex in a paraxial region thereof. The second lens element820is made of glass material and has the object-side surface821and the image-side surface822being both aspheric.

The third lens element830with negative refractive power has an object-side surface831being convex in a paraxial region thereof and an image-side surface832being concave in a paraxial region thereof. The third lens element830is made of plastic material and has the object-side surface831and the image-side surface832being both aspheric. The object-side surface831of the third lens element830has one inflection point. The image-side surface832of the third lens element830has two inflection points. The object-side surface831of the third lens element830has one critical point in an off-axis region thereof.

The fourth lens element840with negative refractive power has an object-side surface841being convex in a paraxial region thereof and an image-side surface842being concave in a paraxial region thereof. The fourth lens element840is made of plastic material and has the object-side surface841and the image-side surface842being both aspheric. The object-side surface841of the fourth lens element840has two inflection points. The image-side surface842of the fourth lens element840has one inflection point. The object-side surface841of the fourth lens element840has one critical point in an off-axis region thereof. The image-side surface842of the fourth lens element840has one critical point in an off-axis region thereof.

The fifth lens element850with negative refractive power has an object-side surface851being concave in a paraxial region thereof and an image-side surface852being concave in a paraxial region thereof. The fifth lens element850is made of plastic material and has the object-side surface851and the image-side surface852being both aspheric. The object-side surface851of the fifth lens element850has two inflection points. The image-side surface852of the fifth lens element850has two inflection points. The object-side surface851of the fifth lens element850has two critical points in an off-axis region thereof. The image-side surface852of the fifth lens element850has two critical points in an off-axis region thereof.

The sixth lens element860with positive refractive power has an object-side surface861being convex in a paraxial region thereof and an image-side surface862being convex in a paraxial region thereof. The sixth lens element860is made of plastic material and has the object-side surface861and the image-side surface862being both aspheric. The object-side surface861of the sixth lens element860has two inflection points. The image-side surface862of the sixth lens element860has four inflection points. The object-side surface861of the sixth lens element860has one critical point in an off-axis region thereof. The image-side surface862of the sixth lens element860has two critical points in an off-axis region thereof.

The seventh lens element870with negative refractive power has an object-side surface871being concave in a paraxial region thereof and an image-side surface872being concave in a paraxial region thereof. The seventh lens element870is made of plastic material and has the object-side surface871and the image-side surface872being both aspheric. The object-side surface871of the seventh lens element870has three inflection points. The image-side surface872of the seventh lens element870has two inflection points. The object-side surface871of the seventh lens element870has one critical point in an off-axis region thereof. The image-side surface872of the seventh lens element870has one critical point in an off-axis region thereof.

The filter880is made of glass material and located between the seventh lens element870and the image surface890, and will not affect the focal length of the imaging lens assembly. The image sensor895is disposed on or near the image surface890of the imaging lens assembly.

Moreover, these parameters can be calculated from Table 15 and Table 16 as the following values and satisfy the following conditions:

FIG. 17is a schematic view of an image capturing unit according to the 9th embodiment of the present disclosure.FIG. 18shows, in order from left to right, spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 9th embodiment. InFIG. 17, the image capturing unit includes the imaging lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor995. The imaging lens assembly includes, in order from an object side to an image side along an optical path, a first lens element910, an aperture stop900, a second lens element920, a stop901, a third lens element930, a fourth lens element940, a stop902, a fifth lens element950, a sixth lens element960, a seventh lens element970, a filter980and an image surface990. The imaging lens assembly includes seven lens elements (910,920,930,940,950,960and970) with no additional lens element disposed between each of the adjacent seven lens elements.

The first lens element910with positive refractive power has an object-side surface911being convex in a paraxial region thereof and an image-side surface912being concave in a paraxial region thereof. The first lens element910is made of plastic material and has the object-side surface911and the image-side surface912being both aspheric. The object-side surface911of the first lens element910has two inflection points. The image-side surface912of the first lens element910has two inflection points.

The second lens element920with positive refractive power has an object-side surface921being convex in a paraxial region thereof and an image-side surface922being convex in a paraxial region thereof. The second lens element920is made of plastic material and has the object-side surface921and the image-side surface922being both aspheric. The object-side surface921of the second lens element920has two inflection points. The object-side surface921of the second lens element920has one critical point in an off-axis region thereof.

The third lens element930with negative refractive power has an object-side surface931being convex in a paraxial region thereof and an image-side surface932being concave in a paraxial region thereof. The third lens element930is made of plastic material and has the object-side surface931and the image-side surface932being both aspheric. The object-side surface931of the third lens element930has one inflection point. The image-side surface932of the third lens element930has two inflection points. The object-side surface931of the third lens element930has one critical point in an off-axis region thereof.

The fourth lens element940with positive refractive power has an object-side surface941being convex in a paraxial region thereof and an image-side surface942being concave in a paraxial region thereof. The fourth lens element940is made of plastic material and has the object-side surface941and the image-side surface942being both aspheric. The object-side surface941of the fourth lens element940has two inflection points. The image-side surface942of the fourth lens element940has one inflection point. The object-side surface941of the fourth lens element940has one critical point in an off-axis region thereof. The image-side surface942of the fourth lens element940has one critical point in an off-axis region thereof.

The fifth lens element950with negative refractive power has an object-side surface951being concave in a paraxial region thereof and an image-side surface952being concave in a paraxial region thereof. The fifth lens element950is made of plastic material and has the object-side surface951and the image-side surface952being both aspheric. The object-side surface951of the fifth lens element950has two inflection points. The image-side surface952of the fifth lens element950has two inflection points. The object-side surface951of the fifth lens element950has two critical points in an off-axis region thereof. The image-side surface952of the fifth lens element950has two critical points in an off-axis region thereof.

The sixth lens element960with positive refractive power has an object-side surface961being convex in a paraxial region thereof and an image-side surface962being convex in a paraxial region thereof. The sixth lens element960is made of plastic material and has the object-side surface961and the image-side surface962being both aspheric. The object-side surface961of the sixth lens element960has two inflection points. The image-side surface962of the sixth lens element960has two inflection points. The object-side surface961of the sixth lens element960has one critical point in an off-axis region thereof. The image-side surface962of the sixth lens element960has two critical points in an off-axis region thereof.

The seventh lens element970with negative refractive power has an object-side surface971being concave in a paraxial region thereof and an image-side surface972being concave in a paraxial region thereof. The seventh lens element970is made of plastic material and has the object-side surface971and the image-side surface972being both aspheric. The object-side surface971of the seventh lens element970has three inflection points. The image-side surface972of the seventh lens element970has two inflection points. The image-side surface972of the seventh lens element970has one critical point in an off-axis region thereof.

The filter980is made of glass material and located between the seventh lens element970and the image surface990, and will not affect the focal length of the imaging lens assembly. The image sensor995is disposed on or near the image surface990of the imaging lens assembly.

The detailed optical data of the 9th embodiment are shown in Table 17 and the aspheric surface data are shown in Table 18 below.

Moreover, these parameters can be calculated from Table 17 and Table 18 as the following values and satisfy the following conditions:

FIG. 19is a schematic view of an image capturing unit according to the 10th embodiment of the present disclosure.FIG. 20shows, in order from left to right, spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 10th embodiment. InFIG. 19, the image capturing unit includes the imaging lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor1095. The imaging lens assembly includes, in order from an object side to an image side along an optical path, a first lens element1010, an aperture stop1000, a second lens element1020, a stop1001, a third lens element1030, a fourth lens element1040, a stop1002, a fifth lens element1050, a sixth lens element1060, a seventh lens element1070, a filter1080and an image surface1090. The imaging lens assembly includes seven lens elements (1010,1020,1030,1040,1050,1060and1070) with no additional lens element disposed between each of the adjacent seven lens elements.

The first lens element1010with positive refractive power has an object-side surface1011being convex in a paraxial region thereof and an image-side surface1012being concave in a paraxial region thereof. The first lens element1010is made of plastic material and has the object-side surface1011and the image-side surface1012being both aspheric. The image-side surface1012of the first lens element1010has two inflection points.

The second lens element1020with positive refractive power has an object-side surface1021being convex in a paraxial region thereof and an image-side surface1022being convex in a paraxial region thereof. The second lens element1020is made of plastic material and has the object-side surface1021and the image-side surface1022being both aspheric. The object-side surface1021of the second lens element1020has two inflection points. The image-side surface1022of the second lens element1020has one inflection point. The object-side surface1021of the second lens element1020has one critical point in an off-axis region thereof.

The third lens element1030with negative refractive power has an object-side surface1031being concave in a paraxial region thereof and an image-side surface1032being concave in a paraxial region thereof. The third lens element1030is made of plastic material and has the object-side surface1031and the image-side surface1032being both aspheric. The object-side surface1031of the third lens element1030has one inflection point. The image-side surface1032of the third lens element1030has two inflection points. The image-side surface1032of the third lens element1030has two critical points in an off-axis region thereof.

The fourth lens element1040with negative refractive power has an object-side surface1041being convex in a paraxial region thereof and an image-side surface1042being concave in a paraxial region thereof. The fourth lens element1040is made of plastic material and has the object-side surface1041and the image-side surface1042being both aspheric. The object-side surface1041of the fourth lens element1040has two inflection points. The image-side surface1042of the fourth lens element1040has two inflection points. The object-side surface1041of the fourth lens element1040has one critical point in an off-axis region thereof. The image-side surface1042of the fourth lens element1040has one critical point in an off-axis region thereof.

The fifth lens element1050with negative refractive power has an object-side surface1051being concave in a paraxial region thereof and an image-side surface1052being convex in a paraxial region thereof. The fifth lens element1050is made of plastic material and has the object-side surface1051and the image-side surface1052being both aspheric. The object-side surface1051of the fifth lens element1050has two inflection points. The image-side surface1052of the fifth lens element1050has three inflection points. The image-side surface1052of the fifth lens element1050has two critical points in an off-axis region thereof.

The sixth lens element1060with positive refractive power has an object-side surface1061being convex in a paraxial region thereof and an image-side surface1062being convex in a paraxial region thereof. The sixth lens element1060is made of plastic material and has the object-side surface1061and the image-side surface1062being both aspheric. The object-side surface1061of the sixth lens element1060has two inflection points. The image-side surface1062of the sixth lens element1060has three inflection points. The object-side surface1061of the sixth lens element1060has one critical point in an off-axis region thereof. The image-side surface1062of the sixth lens element1060has two critical points in an off-axis region thereof.

The seventh lens element1070with negative refractive power has an object-side surface1071being concave in a paraxial region thereof and an image-side surface1072being concave in a paraxial region thereof. The seventh lens element1070is made of plastic material and has the object-side surface1071and the image-side surface1072being both aspheric. The object-side surface1071of the seventh lens element1070has three inflection points. The image-side surface1072of the seventh lens element1070has three inflection points. The object-side surface1071of the seventh lens element1070has one critical point in an off-axis region thereof. The image-side surface1072of the seventh lens element1070has one critical point in an off-axis region thereof.

The filter1080is made of glass material and located between the seventh lens element1070and the image surface1090, and will not affect the focal length of the imaging lens assembly. The image sensor1095is disposed on or near the image surface1090of the imaging lens assembly.

The detailed optical data of the 10th embodiment are shown in Table 19 and the aspheric surface data are shown in Table 20 below.

Moreover, these parameters can be calculated from Table 19 and Table 20 as the following values and satisfy the following conditions:

FIG. 21is a perspective view of an image capturing unit according to the 11th embodiment of the present disclosure. In this embodiment, an image capturing unit10is a camera module including a lens unit11, a driving device12, an image sensor13and an image stabilizer14. The lens unit11includes the imaging lens assembly disclosed in the 1st embodiment, a barrel and a holder member (their reference numerals are omitted) for holding the imaging lens assembly. However, the lens unit11may alternatively be provided with the imaging lens assembly disclosed in other abovementioned embodiments, and the present disclosure is not limited thereto. The imaging light converges in the lens unit11of the image capturing unit10to generate an image with the driving device12utilized for image focusing on the image sensor13, and the generated image is then digitally transmitted to other electronic component for further processing.

The driving device12can have auto focusing functionality, and different driving configurations can be obtained through the usages of voice coil motors (VCM), micro electro-mechanical systems (MEMS), piezoelectric systems, or shape memory alloy materials. The driving device12is favorable for obtaining a better imaging position of the lens unit11, so that a clear image of the imaged object can be captured by the lens unit11with different object distances. The image sensor13(for example, CCD or CMOS), which can feature high photosensitivity and low noise, is disposed on the image surface of the imaging lens assembly to provide higher image quality.

The image stabilizer14, such as an accelerometer, a gyro sensor and a Hall Effect sensor, is configured to work with the driving device12to provide optical image stabilization (01S). The driving device12working with the image stabilizer14is favorable for compensating for pan and tilt of the lens unit11to reduce blurring associated with motion during exposure. In some cases, the compensation can be provided by electronic image stabilization (EIS) with image processing software, thereby improving image quality while in motion or low-light conditions.

FIG. 22is one perspective view of an electronic device according to the 12th embodiment of the present disclosure.FIG. 23is another perspective view of the electronic device inFIG. 22.FIG. 24is a block diagram of the electronic device inFIG. 22.

In this embodiment, an electronic device20is a smartphone including the image capturing unit10disclosed in the 11th embodiment, an image capturing unit10a, an image capturing unit10b, an image capturing unit10c, an image capturing unit10d, a flash module21, a focus assist module22, an image signal processor23, a user interface24and an image software processor25. The image capturing unit10and the image capturing unit10aare disposed on the same side of the electronic device20and each of the image capturing units10and10ahas a single focal point. The image capturing unit10b, the image capturing unit10c, the image capturing unit10dand the user interface24are disposed on the opposite side of the electronic device20and the user interface24is a display unit, such that the image capturing units10b,10c,10dcan be front-facing cameras of the electronic device20for taking selfies, but the present disclosure is not limited thereto. Furthermore, each of the image capturing units10a,10b,10cand10dcan include the imaging lens assembly of the present disclosure and can have a configuration similar to that of the image capturing unit10. In detail, each of the image capturing units10a,10b,10cand10dcan include a lens unit, a driving device, an image sensor and an image stabilizer, and each of the lens unit can include an optical lens assembly such as the imaging lens assembly of the present disclosure, a barrel and a holder member for holding the optical lens assembly.

The image capturing unit10is a wide-angle image capturing unit, the image capturing unit10ais an ultra-wide-angle image capturing unit, the image capturing unit10bis a wide-angle image capturing unit, the image capturing unit10cis an ultra-wide-angle image capturing unit, and the image capturing unit10dis a ToF (time of flight) image capturing unit, such that the electronic device20can have various magnification ratios so as to meet the requirement of optical zoom functionality. In addition, the image capturing unit10dcan determine depth information of the imaged object. In this embodiment, the electronic device20includes multiple image capturing units10,10a,10b,10cand10d, but the present disclosure is not limited to the number and arrangement of image capturing units.

When a user captures images of an object26, the light rays converge in the image capturing unit10or the image capturing unit10ato generate an image(s), and the flash module21is activated for light supplement. The focus assist module22detects the object distance of the imaged object26to achieve fast auto focusing. The image signal processor23is configured to optimize the captured image to improve image quality. The light beam emitted from the focus assist module22can be either conventional infrared or laser. In addition, the light rays may converge in the image capturing unit10b,10cor10dto generate an image(s). The user interface24can be a touch screen or a physical button. The user is able to interact with the user interface24and the image software processor25having multiple functions to capture images and complete image processing. The image processed by the image software processor25can be displayed on the user interface24.

FIG. 25is one perspective view of an electronic device according to the 13th embodiment of the present disclosure.

In this embodiment, an electronic device30is a smartphone including the image capturing unit10disclosed in the 11th embodiment, an image capturing unit10e, an image capturing unit10f, a flash module31, a focus assist module, an image signal processor, a display unit and an image software processor (not shown). The image capturing unit10, the image capturing unit10eand the image capturing unit10fare disposed on the same side of the electronic device30, while the display unit is disposed on the opposite side of the electronic device30. Furthermore, each of the image capturing units10eand10fcan include the imaging lens assembly of the present disclosure and can have a configuration similar to that of the image capturing unit10, so the details in this regard will not be provided again.

The image capturing unit10is a wide-angle image capturing unit, the image capturing unit10eis a telephoto image capturing unit, and the image capturing unit10fis an ultra-wide-angle image capturing unit. In this embodiment, the image capturing units10,10eand10fhave different fields of view, such that the electronic device30can have various magnification ratios so as to meet the requirement of optical zoom functionality. Moreover, the image capturing unit10ecan be a telephoto image capturing unit having a light-folding element configuration, such that the total track length of the image capturing unit10eis not limited by the thickness of the electronic device30. Moreover, the light-folding element configuration of the image capturing unit10ecan be similar to, for example, one of the structures shown inFIG. 28toFIG. 30which can be referred to foregoing descriptions corresponding toFIG. 28toFIG. 30so the details in this regard will not be provided again. In this embodiment, the electronic device30includes multiple image capturing units10,10eand10f, but the present disclosure is not limited to the number and arrangement of image capturing units. When a user captures images of an object, light rays converge in the image capturing unit10,10eor10fto generate images, and the flash module31is activated for light supplement. Further, the subsequent processes are performed in a manner similar to the abovementioned embodiment, so the details in this regard will not be provided again.

FIG. 26is one perspective view of an electronic device according to the 14th embodiment of the present disclosure.

In this embodiment, an electronic device40is a smartphone including the image capturing unit10disclosed in the 11th embodiment, an image capturing unit10g, an image capturing unit10h, an image capturing unit10i, an image capturing unit10j, an image capturing unit10k, an image capturing unit10m, an image capturing unit10n, an image capturing unit10p, a flash module41, a focus assist module, an image signal processor, a display unit and an image software processor (not shown). The image capturing unit10,10g,10h,10i,10j,10k,10m,10nand10pare disposed on the same side of the electronic device40, while the display unit is disposed on the opposite side of the electronic device40. Furthermore, each of the image capturing units10g,10h,10i,10j,10k,10m,10nand10pcan include the imaging lens assembly of the present disclosure and can have a configuration similar to that of the image capturing unit10, so the details in this regard will not be provided again.

The image capturing unit10is a wide-angle image capturing unit, the image capturing unit10gis a telephoto image capturing unit, the image capturing unit10his a telephoto image capturing unit, the image capturing unit10iis a wide-angle image capturing unit, the image capturing unit10jis an ultra-wide-angle image capturing unit, the image capturing unit10kis an ultra-wide-angle image capturing unit, the image capturing unit10mis a telephoto image capturing unit, the image capturing unit10nis a telephoto image capturing unit, and the image capturing unit10pis a ToF image capturing unit. In this embodiment, the image capturing units10,10g,10h,10i,10j,10k,10mand10nhave different fields of view, such that the electronic device40can have various magnification ratios so as to meet the requirement of optical zoom functionality. Moreover, each of the image capturing units10gand10hcan be a telephoto image capturing unit having a light-folding element configuration. Moreover, the light-folding element configuration of each of the image capturing unit10gand10hcan be similar to, for example, one of the structures shown inFIG. 28toFIG. 30which can be referred to foregoing descriptions corresponding toFIG. 28toFIG. 30so the details in this regard will not be provided again. In addition, the image capturing unit10pcan determine depth information of the imaged object. In this embodiment, the electronic device40includes multiple image capturing units10,10g,10h,10i,10j,10k,10m,10nand10p, but the present disclosure is not limited to the number and arrangement of image capturing units. When a user captures images of an object, the light rays converge in the image capturing unit10,10g,10h,10i,10j,10k,10m,10nor10pto generate an image(s), and the flash module41is activated for light supplement. Further, the subsequent processes are performed in a manner similar to the abovementioned embodiments, so the details in this regard will not be provided again.

The smartphone in this embodiment is only exemplary for showing the image capturing unit10of the present disclosure installed in an electronic device, and the present disclosure is not limited thereto. The image capturing unit10can be optionally applied to optical systems with a movable focus. Furthermore, the imaging lens assembly of the image capturing unit10features good capability in aberration corrections and high image quality, and can be applied to 3D (three-dimensional) image capturing applications, in products such as digital cameras, mobile devices, digital tablets, smart televisions, network surveillance devices, dashboard cameras, vehicle backup cameras, multi-camera devices, image recognition systems, motion sensing input devices, wearable devices and other electronic imaging devices.