阅读说明：本技术 取像镜头、取像模组和电子装置 (Image capturing lens, image capturing module and electronic device ) 是由 邹海荣 刘彬彬 兰宾利 于 2018-08-31 设计创作，主要内容包括：本发明公开了一种取像镜头、取像模组和电子装置。取像镜头从物侧至像侧依次包括光阑、具有正屈折力的第一透镜、具有负屈折力的第二透镜、具有屈折力的第三透镜、具有正屈折力的第四透镜和具有负屈折力的第五透镜。第一透镜的物侧面为凸面。第二透镜的像侧面于光轴处为凹面。第三透镜的物侧面于圆周处为凹面。第四透镜的物侧面为凹面,第四透镜的像侧面为凸面。第五透镜的物侧面于光轴处为凹面,第五透镜的像侧面于光轴处为凹面,第五透镜的物侧面与像侧面中至少一表面包含至少一个反曲点。取像镜头满足关系式：SL/TTL>0.9。本发明的取像镜头、取像模组和电子装置具有合理的透镜配置且满足SL/TTL>0.9,可减少取像镜头产生暗角的可能性,从而提高成像质量。(The invention discloses an image capturing lens, an image capturing module and an electronic device. The image capturing lens sequentially comprises a diaphragm, a first lens element with positive refractive power, a second lens element with negative refractive power, a third lens element with refractive power, a fourth lens element with positive refractive power and a fifth lens element with negative refractive power from an object side to an image side. The object side surface of the first lens is a convex surface. The image side surface of the second lens is a concave surface at the optical axis. The object side surface of the third lens is concave at the circumference. The object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface. The object side surface of the fifth lens element is concave at the optical axis, the image side surface of the fifth lens element is concave at the optical axis, and at least one of the object side surface and the image side surface of the fifth lens element includes at least one inflection point. The image capturing lens meets the relation: SL/TTL > 0.9. The image taking lens, the image taking module and the electronic device have reasonable lens configuration, meet the requirement that SL/TTL is more than 0.9, and reduce the possibility of generating a dark corner of the image taking lens, thereby improving the imaging quality.)

1. An image capturing lens, comprising, in order from an object side to an image side:

a diaphragm;

a first lens element with positive refractive power having a convex object-side surface;

the second lens element with negative refractive power has a concave image-side surface at an optical axis;

a third lens element with refractive power, wherein an object-side surface of the third lens element is concave at a circumference;

a fourth lens element with positive refractive power having a concave object-side surface and a convex image-side surface;

the optical lens assembly comprises a fifth lens element with negative refractive power, wherein an object-side surface of the fifth lens element is concave on an optical axis, an image-side surface of the fifth lens element is concave on the optical axis, both the object-side surface and the image-side surface of the fifth lens element are aspheric, and at least one of the object-side surface and the image-side surface of the fifth lens element comprises at least one inflection point;

the image capturing lens meets the following conditional expression:

SL/TTL>0.9；

wherein SL is a distance between the diaphragm and an imaging surface on an optical axis, and TTL is a distance between an object-side surface of the first lens element and the imaging surface on the optical axis.

2. The taking lens as claimed in claim 1, wherein the taking lens satisfies the following conditional expression:

|f12/f45|<2；

wherein f12 is a combined focal length of the first lens and the second lens, and f45 is a combined focal length of the fourth lens and the fifth lens.

3. The taking lens as claimed in claim 1, wherein the taking lens satisfies the following conditional expression:

EPD/ImgH>0.5；

the EPD is the diameter of the entrance pupil of the image capturing lens, and the ImgH is half of the diagonal length of the effective area of the imaging surface.

4. The taking lens as claimed in claim 1, wherein the taking lens satisfies the following conditional expression:

SAG51<0.5，SAG52<0.55；

SAG51 is the distance on the optical axis between the intersection point of the object side surface of the fifth lens and the optical axis and the effective semi-aperture vertex of the object side surface of the fifth lens, and SAG52 is the distance on the optical axis between the intersection point of the image side surface of the fifth lens and the optical axis and the effective semi-aperture vertex of the image side surface of the fifth lens.

5. The taking lens as claimed in claim 1, wherein the taking lens satisfies the following conditional expression:

SAG21<0.1，SAG22<0.2；

the SAG21 is a distance on an optical axis between an intersection point of an object side surface and an optical axis of the second lens and an effective semi-aperture vertex of the object side surface of the second lens, and the SAG22 is a distance on the optical axis between an intersection point of an image side surface and the optical axis of the second lens and the effective semi-aperture vertex of the image side surface of the second lens.

6. The taking lens as claimed in claim 1, wherein the taking lens satisfies the following conditional expression:

FOV/CRA1.0Y>2；

the FOV is the angle of view of the taking lens, and CRA1.0Y is the incident angle of the chief ray at the position 1.0 times the image height of the imaging plane.

7. The taking lens as claimed in claim 1, wherein the taking lens satisfies the following conditional expression:

R5/f≥1；

wherein R5 is a curvature radius of an image-side surface of the second lens element, and f is an effective focal length of the image capturing lens.

8. The taking lens as claimed in claim 1, wherein the taking lens satisfies the following conditional expression:

DT11/DT52<0.5；

DT11 is a maximum effective radius of an object-side surface of the first lens, and DT52 is a maximum effective radius of an image-side surface of the fifth lens.

9. The taking lens as claimed in claim 1, wherein the taking lens satisfies the following conditional expression:

Zc52/Yc52<0.2；

the image-side surface of the fifth lens element, except for the intersection point with the optical axis, is perpendicular to the optical axis at a tangent plane, the tangent plane is perpendicular to a tangent point of the image-side surface of the fifth lens element, Zc52 is the horizontal distance between the tangent point and the intersection point of the image-side surface of the fifth lens element and the optical axis, and Yc52 is the vertical distance between the tangent point and the optical axis.

10. An image capturing module, comprising:

the taking lens as claimed in any one of claims 1 to 9; and

the photosensitive element is arranged on the image side of the image taking lens.

11. An electronic device, comprising:

a housing; and

the image capture module of claim 10, mounted on the housing.

Technical Field

The present invention relates to an optical imaging technology, and in particular, to an image capturing lens, an image capturing module and an electronic device.

Background

Due to the progress of the manufacturing process and the trend of the development of light and thin electronic products, the pixel size of the image sensing component is continuously reduced, so that the requirement of the system on the imaging quality is further improved, and the traditional 5-piece optical system has the problems of low sensitivity, easy occurrence of dark corners and the like, so that the imaging quality is affected, and therefore, a camera lens module with better imaging quality is urgently needed.

Disclosure of Invention

The embodiment of the invention provides an image capturing lens, an image capturing module and an electronic device.

The image capturing lens system of the present disclosure includes, in order from an object side to an image side, a stop, a first lens element with positive refractive power, a second lens element with negative refractive power, a third lens element with refractive power, a fourth lens element with positive refractive power, and a fifth lens element with negative refractive power. The object side surface of the first lens is a convex surface. The image side surface of the second lens is a concave surface at the optical axis. The object side surface of the third lens is concave at the circumference. The object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface. The object side surface of the fifth lens is a concave surface at the optical axis, the image side surface of the fifth lens is a concave surface at the optical axis, both the object side surface and the image side surface of the fifth lens are aspheric surfaces, and at least one of the object side surface and the image side surface of the fifth lens comprises at least one inflection point. The imaging lens meets the following relational expression: SL/TTL > 0.9; wherein SL is a distance between the diaphragm and an imaging surface on an optical axis, and TTL is a distance between an object-side surface of the first lens element and the imaging surface on the optical axis.

The image-taking lens provided by the embodiment of the invention has reasonable lens configuration and meets the requirement that SL/TTL is more than 0.9, so that the exit pupil is far away from the imaging surface, light rays are arranged on the photosensitive element in a mode of approaching vertical incidence, the image-taking lens has telecentric property, the telecentric property is very important for the photosensitive capability of the solid electronic photosensitive element, the photosensitive sensitivity of the electronic photosensitive element can be improved, the possibility of generating a dark angle by the image-taking lens is reduced, and the imaging quality is improved.

In some embodiments, the imaging lens further satisfies the following conditional expression: l f12/f45 l < 2; wherein f12 is a combined focal length of the first lens and the second lens, and f45 is a combined focal length of the fourth lens and the fifth lens.

When the image capturing lens meets the requirement of | f12/f45| <2, the refractive power configurations of the first lens element, the second lens element, the fourth lens element and the fifth lens element are reasonable, which is beneficial to shortening the length of the image capturing lens.

In some embodiments, the imaging lens further satisfies the following conditional expression: EPD/ImgH > 0.5; the EPD is the diameter of the entrance pupil of the image capturing lens, and the ImgH is half of the diagonal length of the effective area of the imaging surface.

When the image capturing lens meets the requirements that EPD/ImgH is more than 0.5, the large aperture and the high pixel can be simultaneously kept.

In some embodiments, the imaging lens further satisfies the following conditional expression: SAG51<0.5, SAG52< 0.55; SAG51 is the distance on the optical axis between the intersection point of the object side surface of the fifth lens and the optical axis and the effective semi-aperture vertex of the object side surface of the fifth lens, and SAG52 is the distance on the optical axis between the intersection point of the image side surface of the fifth lens and the optical axis and the effective semi-aperture vertex of the image side surface of the fifth lens.

When the imaging lens meets SAG51<0.5 and SAG52<0.55, the processing difficulty of the imaging lens can be reduced, and the yield of the imaging lens is improved.

In some embodiments, the imaging lens further satisfies the following conditional expression: SAG21<0.1, SAG22< 0.2; the SAG21 is a distance on an optical axis between an intersection point of an object side surface and an optical axis of the second lens and an effective semi-aperture vertex of the object side surface of the second lens, and the SAG22 is a distance on the optical axis between an intersection point of an image side surface and the optical axis of the second lens and the effective semi-aperture vertex of the image side surface of the second lens.

When the imaging lens meets SAG21<0.1 and SAG22<0.2, the processing difficulty of the imaging lens can be reduced, and the yield of the imaging lens is improved.

In some embodiments, the imaging lens further satisfies the following conditional expression: FOV/CRA1.0Y > 2; the FOV is the angle of view of the taking lens, and CRA1.0Y is the incident angle of the chief ray at the position 1.0 times the image height of the imaging plane.

When the imaging lens meets the FOV/CRA1.0Y >2, the imaging lens can be ensured to have a larger angle of view.

In some embodiments, the imaging lens further satisfies the following conditional expression: r5/f is more than or equal to 1; wherein R5 is a curvature radius of an image-side surface of the second lens element, and f is an effective focal length of the image capturing lens.

When the imaging lens meets the condition that R5/f is more than or equal to 1, the aberration of the imaging lens is favorably optimized.

In some embodiments, the imaging lens further satisfies the following conditional expression: DT11/DT52< 0.5; DT11 is a maximum effective radius of an object-side surface of the first lens, and DT52 is a maximum effective radius of an image-side surface of the fifth lens.

When the imaging lens meets DT11/DT52<0.5, the miniaturization of the imaging lens is facilitated and the appearance requirement of the imaging lens can be met.

In some embodiments, the imaging lens further satisfies the following conditional expression: zc52/Yc52< 0.2; the image-side surface of the fifth lens element, except for the intersection point with the optical axis, is perpendicular to the optical axis at a tangent plane, the tangent plane is perpendicular to a tangent point of the image-side surface of the fifth lens element, Zc52 is the horizontal distance between the tangent point and the intersection point of the image-side surface of the fifth lens element and the optical axis, and Yc52 is the vertical distance between the tangent point and the optical axis.

When the imaging lens meets Zc52/Yc52<0.2, the molding difficulty of the fifth lens can be reduced, the yield of the imaging lens is improved, and the situation that the reflectivity of the fifth lens is increased due to the fact that the fifth lens is excessively bent is avoided, so that the probability of generating ghost images is reduced.

The image capturing module of the embodiment of the invention comprises the image capturing lens and the photosensitive element of any one of the above embodiments. The photosensitive element is arranged on the image side of the image taking lens.

The image capturing module has reasonable lens configuration and meets the requirement that SL/TTL is more than 0.9, so that the exit pupil is far away from an imaging surface, light rays are arranged on the photosensitive element in a mode of approaching vertical incidence, the image capturing module has telecentric property, the telecentric property is very important for the photosensitive capability of the solid electronic photosensitive element, the photosensitive sensitivity of the electronic photosensitive element can be improved, the possibility of generating a dark angle by an image capturing lens is reduced, and the imaging quality is improved.

The electronic device of the embodiment of the invention comprises a shell and the image capturing module of the embodiment. The image capturing module is installed on the shell.

The electronic device provided by the embodiment of the invention has reasonable lens configuration and meets the requirement that SL/TTL is more than 0.9, so that the exit pupil is far away from the imaging surface, light rays are arranged on the photosensitive element in a mode of approaching vertical incidence, the electronic device has telecentric property, the telecentric property is very important for the photosensitive capability of the solid electronic photosensitive element, the photosensitive sensitivity of the electronic photosensitive element can be improved, the possibility of generating a dark angle by an image taking lens is reduced, and the imaging quality is improved.

Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an image capturing lens according to a first embodiment of the present invention;

fig. 2 is a longitudinal aberration diagram (mm) of the taking lens in the first embodiment;

fig. 3 is a field curvature diagram (mm) of the taking lens in the first embodiment;

fig. 4 is a distortion diagram (%) of the taking lens in the first embodiment;

fig. 5 is a schematic structural diagram of an image capturing lens according to a second embodiment of the present invention;

fig. 6 is a longitudinal aberration diagram (mm) of the taking lens in the second embodiment;

fig. 7 is a curvature of field (mm) of the taking lens in the second embodiment;

fig. 8 is a distortion diagram (%) of the taking lens in the second embodiment;

fig. 9 is a schematic structural diagram of an image capturing lens according to a third embodiment of the present invention;

fig. 10 is a longitudinal aberration diagram (mm) of the taking lens in the third embodiment;

fig. 11 is a curvature of field (mm) of the taking lens in the third embodiment;

fig. 12 is a distortion diagram (%) of the taking lens in the third embodiment;

fig. 13 is a schematic structural diagram of an image capturing lens according to a fourth embodiment of the present invention;

fig. 14 is a longitudinal aberration diagram (mm) of the taking lens in the fourth embodiment;

fig. 15 is a field curvature diagram (mm) of the taking lens in the fourth embodiment;

fig. 16 is a distortion diagram (%) of the taking lens in the fourth embodiment;

FIG. 17 is a schematic view of an image capturing module according to an embodiment of the present invention; and

fig. 18 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

Referring to fig. 1, fig. 5, fig. 9 and fig. 13, the taking lens assembly 10 according to the embodiment of the invention includes, in order from an object side to an image side, a stop STO, a first lens element L1 with positive refractive power, a second lens element L2 with negative refractive power, a third lens element L3 with refractive power, a fourth lens element L4 with positive refractive power and a fifth lens element L5 with negative refractive power.

The first lens element L1 has an object-side surface S1 and an image-side surface S2, and the object-side surface S1 of the first lens element L1 is convex. The second lens L2 has an object-side surface S3 and an image-side surface S4, and the image-side surface S4 of the second lens L2 is concave on the optical axis. The third lens element L3 has an object-side surface S5 and an image-side surface S6, and the object-side surface S5 of the third lens element L3 is concave at its circumference. The fourth lens element L4 has an object-side surface S7 and an image-side surface S8, wherein the object-side surface S7 of the fourth lens element L4 is concave, and the image-side surface S8 of the fourth lens element L4 is convex. The fifth lens element L5 has an object-side surface S9 and an image-side surface S10, the image-side surface S10 of the fifth lens element L5 is concave along the optical axis, the object-side surface S9 and the image-side surface S10 of the fifth lens element L5 are both aspheric, and at least one of the object-side surface S9 and the image-side surface S10 of the fifth lens element L5 includes at least one inflection point. For example, object side S9 includes one, two, or three points of inflection; as another example, like side S10 includes one, two, or three points of inflection; as another example, object side S9 includes one, two, or three points of inflection, while image side S10 includes one, two, or three points of inflection. Of course, the number of points of inflection is not limited to the above-mentioned one, two or three, but may be other numbers such as five, six, etc.

The image taking lens 10 satisfies the following relation: SL/TTL > 0.9; wherein SL is the distance on the optical axis from the stop STO to the image plane S13, and TTL is the distance on the optical axis from the object-side surface S1 of the first lens element L1 to the image plane S13. That is, the SL/TTL can be any value greater than 0.9, e.g., 0.91, 0.92, 0.93, 0.95, 0.96, 0.98, etc.

The image capturing lens 10 of the embodiment of the invention has a reasonable lens configuration and satisfies SL/TTL >0.9, so that the exit pupil is far away from the imaging surface S13, and the light rays are incident on the photosensitive element 20 (shown in fig. 17) in a manner close to vertical incidence, and the image capturing lens 10 has a telecentric property, which is very important for the photosensitive capability of the solid-state electronic photosensitive element, so that the photosensitive sensitivity of the electronic photosensitive element is improved, the possibility of generating a dark angle by the image capturing lens 10 is reduced, and the imaging quality is improved.

In some embodiments, the image capturing lens 10 satisfies the following relationship: l f12/f45 l < 2; where f12 is a combined focal length of the first lens L1 and the second lens L2, and f45 is a combined focal length of the fourth lens L4 and the fifth lens L5. That is, | f12/f45| may be any number less than 2, for example, the value may be 0.23, 0.54, 1.25, 1.33, 1.43, 1.44, 1.49, 1.68, and so on.

When the taking lens 10 satisfies | f12/f45| <2, the refractive power configurations of the first lens element L1, the second lens element L2, the fourth lens element L4 and the fifth lens element L5 are more reasonable, which is beneficial to shortening the length of the taking lens 10.

In some embodiments, the image capturing lens 10 satisfies the following relationship: EPD/ImgH > 0.5; the EPD is the diameter of the entrance pupil of the image capturing lens 10, and the ImgH is half of the diagonal length of the effective area of the imaging plane. That is, EPD/ImgH may be any value greater than 0.5, for example, the value may be 0.51, 0.55, 0.59, 0.60, 0.62, 0.64, 0.75, 0.79, 0.84, and so forth.

The image capturing lens 10 can simultaneously maintain a large aperture and a high pixel when EPD/ImgH >0.5 is satisfied.

In some embodiments, the image capturing lens 10 satisfies the following relationship: SAG51<0.5, SAG52< 0.55; the SAG51 is a distance on the optical axis between an intersection point of the object-side surface S9 of the fifth lens L5 and the optical axis and an effective semi-aperture vertex of the object-side surface S9 of the fifth lens L5, and the SAG52 is a distance on the optical axis between an intersection point of the image-side surface S10 of the fifth lens L5 and the optical axis and an effective semi-aperture vertex of the image-side surface S10 of the fifth lens L5. That is, SAG51 may be any value less than 0.5, SAG52 may be any value less than 0.55, for example, SAG51 may be 0.167, 0.168, 0.170, 0.255, 0.275, 0.385, 0.460, etc., SAG52 may be 0.167, 0.168, 0.170, 0.255, 0.275, 0.385, 0.398, 0.405, 0.460, 0.493, 0.513, etc.

When the image capturing lens 10 satisfies SAG51<0.5 and SAG52<0.55, the processing difficulty of the image capturing lens 10 can be reduced, and the yield of the image capturing lens 10 can be improved.

In some embodiments, the image capturing lens 10 satisfies the following relationship: SAG21<0.1, SAG22< 0.2; the SAG21 is a distance on the optical axis between an intersection point of the object-side surface S3 of the second lens L2 and the optical axis and an effective semi-aperture vertex of the object-side surface S3 of the second lens L2, and the SAG22 is a distance on the optical axis between an intersection point of the image-side surface S4 of the second lens L2 and the optical axis and an effective semi-aperture vertex of the image-side surface S4 of the second lens L2. That is, SAG21 may be any value less than 0.1, SAG22 may be any value less than 0.2, for example, SAG21 may be 0.008, 0.025, 0.039, 0.048, 0.058, 0.064, 0.078, etc., SAG22 may be 0.008, 0.025, 0.039, 0.048, 0.058, 0.064, 0.069, 0.078, 0.099, 0.105, 0.106, 0.135, 0.148, etc.

When the image capturing lens 10 satisfies SAG21<0.1 and SAG22<0.2, the processing difficulty of the image capturing lens 10 can be reduced, and the yield of the image capturing lens 10 can be improved.

In some embodiments, the image capturing lens 10 satisfies the following relationship: FOV/CRA1.0Y > 2; the FOV is the angle of view of the taking lens 10, and CRA1.0Y is the incident angle of the chief ray at the position 1.0 times the image height of the imaging plane S13. That is, FOV/CRA1.0Y may be any value greater than 2, for example, the value may be 2.1, 2.2, 2.5, 2.6, 2.7, 2.8, and so forth.

When the taking lens 10 satisfies the FOV/CRA1.0Y >2, the taking lens 10 can have a larger field angle.

In some embodiments, the image capturing lens 10 satisfies the following conditional expressions: r5/f is more than or equal to 1; where R5 is a curvature radius of the image-side surface S4 of the second lens element L2, and f is an effective focal length of the image taking lens 10. That is, R5/f can be any value greater than or equal to 1, for example, R5/f can be 1.0, 1.1, 1.2, 1.4, 1.8, 1.9, 2.5, 3.1, and so forth.

When the image capturing lens 10 satisfies that R5/f is greater than or equal to 1, the aberration of the image capturing lens 10 is optimized.

In some embodiments, the image capturing lens 10 satisfies the following conditional expressions: DT11/DT52< 0.5; DT11 is the maximum effective radius of the object-side surface S1 of the first lens L1, and DT52 is the maximum effective radius of the image-side surface S10 of the fifth lens L5. That is, DT11/DT52 may be any value less than 0.5, for example, DT11/DT52 may be 0.25, 0.36, 0.37, 0.38, 0.39, 0.41, 0.42, 0.44, and so forth.

When the image capturing lens 10 satisfies DT11/DT52<0.5, the image capturing lens 10 is advantageously miniaturized and can satisfy the appearance requirement of the image capturing lens 10.

In some embodiments, the image capturing lens 10 satisfies the following conditional expressions: zc52/Yc52< 0.2; in addition to the intersection point with the optical axis, on the image-side surface S10 of the fifth lens element L5, a tangent plane of the image-side surface S10 of the fifth lens element L5 perpendicular to the optical axis and a tangent point of the tangent plane and the image-side surface S10 of the fifth lens element L5 are located, Zc52 is the horizontal distance between the tangent point and the image-side surface S10 of the fifth lens element L5 at the intersection point of the optical axis, and Yc52 is the vertical distance between the tangent point and the optical axis. That is, Zc52/Yc52 may be any value less than 0.2, for example, Zc52/Yc52 may be 0.054, 0.086, 0.115, 0.116, 0.119, 0.125, 0.130, 0.138, and the like.

When the taking lens 10 satisfies Zc52/Yc52<0.2, the difficulty of molding the fifth lens element L5 can be reduced, the yield of the taking lens 10 can be improved, and the situation that the reflectivity of the fifth lens element L5 is increased due to the fact that the fifth lens element L5 is too curved can be avoided, so that the probability of generating ghost images is reduced.

In some embodiments, the taking lens 10 further includes an optical filter L6. The filter L6 is disposed between the fifth lens L5 and the image plane S13. In the embodiment of the present invention, the filter L6 is an infrared filter L6. When the taking lens 10 is used for imaging, light emitted or reflected by a subject enters the taking lens 10 from an object side direction, sequentially passes through the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the object side surface S11 and the image side surface S12 of the infrared filter L6, and finally converges on the imaging surface S13.

In some embodiments, stop STO may be an aperture stop or a field stop. The embodiment of the present invention will be described by taking an example in which the stop STO is an aperture stop. The stop STO may be provided between the subject OBJ and the first lens L1, or on the surface of any one lens, or between any two lenses, or between the fifth lens L5 and the infrared filter L6. In the first to fourth embodiments of the present invention, the stop STO is disposed between the object OBJ and the first lens L1, so that the amount of light entering can be controlled better and the imaging effect can be improved.

In some embodiments, the first through fifth lenses L1 through L5 are plastic lenses, glass lenses, or hybrid glass-plastic lenses. In the first to fourth embodiments of the embodiment of the present invention, the first lens L1 to the fifth lens L5 are all plastic lenses.

The image capturing lens 10 can realize ultra-thinning while correcting aberration and solving the temperature drift problem by reasonably configuring the material of the lens, and has low cost.

In some embodiments, at least one surface of the first lens element L1 through the fifth lens element L5 of the taking lens assembly 10 is aspheric. For example, in the first to fourth embodiments, the object-side and image-side surfaces of the first to fifth lenses L1 to L5 are each aspheric. The aspherical surface has a surface shape determined by the following formula:

wherein Z is the longitudinal distance between any point on the aspheric surface and the surface vertex, r is the distance between any point on the aspheric surface and the optical axis, c is the vertex curvature (the reciprocal of the curvature radius), k is the conic constant, and Ai is the correction coefficient of the i-th order of the aspheric surface.

Therefore, the image capturing lens 10 can effectively reduce the total length of the image capturing lens 10 by adjusting the curvature radius and the aspheric surface coefficient of each lens surface, and can effectively correct the aberration and improve the imaging quality.

First embodiment

Referring to fig. 1 to 4, the taking lens 10 of the first embodiment sequentially includes, from an object side to an image side, a stop STO, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5 and an infrared filter L6.

The first lens element L1 with positive refractive power is made of plastic, and has a convex object-side surface S1 and a concave image-side surface S2 along the optical axis, and is substantially planar. The second lens element L2 with negative refractive power is made of plastic, and has a concave object-side surface S3 at the optical axis, a flat surface at the circumference, and a concave image-side surface S4. The third lens element L3 with positive refractive power is made of plastic, and has a convex object-side surface S5 along the optical axis, a concave object-side surface S5 along the circumference, a concave image-side surface S6 along the optical axis, and a convex object-side surface along the circumference. The fourth lens element L4 with positive refractive power is made of plastic, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 with negative refractive power is made of plastic, and has a concave object-side surface S9 along the optical axis and a convex object-side surface S10 along the optical axis.

The f-number FNO of the image taking lens 10 is 2.2.

The ir filter L6 is made of glass, and is disposed between the fifth lens element L5 and the image plane S13 without affecting the focal length of the taking lens 10.

In the first embodiment, the effective focal length f of the taking lens 10 is 3.56mm, and the field angle FOV of the taking lens 10 is 80.0 degrees. The taking lens 10 also satisfies the following conditions: SL/TTL is 0.93; 0.23 | f12/f45 |; EPD/ImgH is 0.55; SAG51 ═ 0.460 mm; SAG52 is 0.493 mm; SAG21 is 0.008 mm; SAG22 ═ 0.069 mm; FOV/CRA1.0Y is 2.5; r5/f ═ 3.1; DT11/DT52 equals 0.36; zc52/Yc52 equals 0.130.

The taking lens 10 satisfies the conditions of the following table:

TABLE 1

TABLE 2

Second embodiment

Referring to fig. 5 to 8, the taking lens 10 of the first embodiment sequentially includes, from an object side to an image side, a stop STO, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5 and an infrared filter L6.

The first lens element L1 with positive refractive power is made of plastic, and has a convex object-side surface S1 and a concave image-side surface S2 along the optical axis, and is substantially planar. The second lens element L2 with negative refractive power is made of plastic, and has a planar object-side surface S3 and a concave image-side surface S4. The third lens element L3 with negative refractive power is made of plastic, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 with positive refractive power is made of plastic, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 with negative refractive power is made of plastic, and has a concave object-side surface S9 along the optical axis and a convex object-side surface S10 along the optical axis.

The f-number FNO of the image taking lens 10 is 2.0.

The ir filter L6 is made of glass, and is disposed between the fifth lens element L5 and the image plane S13 without affecting the focal length of the taking lens 10.

The taking lens 10 satisfies the conditions of the following table:

TABLE 3

TABLE 4

The following data are available from tables 3 and 4:

f(mm)	3.50	SAG52(mm)	0.513
				FNO	2.0	SAG21(mm)	0.039
FOV (degree)	80.0	SAG22(mm)	0.099
				SL/TTL	0.92	FOV/CRA1.0Y	2.6
|f12/f45|	1.44	R5/f	1.1
				EPD/ImgH	0.60	DT11/DT52	0.38
SAG51(mm)	0.275	Zc52/Yc52	0.116

Third embodiment

Referring to fig. 9 to 12, the taking lens 10 of the first embodiment sequentially includes, from an object side to an image side, a stop STO, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5 and an infrared filter L6.

The first lens element L1 with positive refractive power is made of plastic, and has a convex object-side surface S1 and a concave image-side surface S2 along the optical axis, and is substantially planar. The second lens element L2 with negative refractive power is made of plastic, and has a convex object-side surface S3 along the optical axis, a concave object-side surface S3 along the circumference, a concave image-side surface S4 along the optical axis, and a convex object-side surface along the circumference. The third lens element L3 with negative refractive power is made of plastic, and has a concave object-side surface S5 and a concave image-side surface S6 along the optical axis and a convex surface along the circumference. The fourth lens element L4 with positive refractive power is made of plastic, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 with negative refractive power is made of plastic, and has a concave object-side surface S9 along the optical axis and a convex object-side surface S10 along the optical axis.

The f-number FNO of the taking lens 10 is 1.9.

The ir filter L6 is made of glass, and is disposed between the fifth lens element L5 and the image plane S13 without affecting the focal length of the taking lens 10.

The taking lens 10 satisfies the conditions of the following table:

TABLE 5

TABLE 6

The following data are available from tables 5 and 6:

f(mm)	3.44	SAG52(mm)	0.405
				FNO	1.9	SAG21(mm)	0.064
FOV (degree)	80.8	SAG22(mm)	0.106
				SL/TTL	0.92	FOV/CRA1.0Y	2.1
|f12/f45|	1.49	R5/f	1.1
				EPD/ImgH	0.62	DT11/DT52	0.39
SAG51(mm)	0.170	Zc52/Yc52	0.115

Fourth embodiment

The taking lens 10 of the first embodiment includes, in order from the object side to the image side, a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and an infrared filter L6.

The first lens element L1 with positive refractive power is made of plastic, and has a convex object-side surface S1, a concave image-side surface S2 along the optical axis and a convex surface along the circumference. The second lens element L2 with negative refractive power is made of plastic, and has a convex object-side surface S3 along the optical axis, a concave object-side surface S3 along the circumference, a concave image-side surface S4 along the optical axis, and a convex object-side surface along the circumference. The third lens element L3 with negative refractive power is made of plastic, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 with positive refractive power is made of plastic, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 with negative refractive power is made of plastic, and has a concave object-side surface S9 along the optical axis and a convex object-side surface S10 along the optical axis.

The f-number FNO of the image taking lens 10 is 2.0.

The ir filter L6 is made of glass, and is disposed between the fifth lens element L5 and the image plane S13 without affecting the focal length of the taking lens 10.

The taking lens 10 satisfies the conditions of the following table:

TABLE 7

TABLE 8

The following data are obtained from tables 7 and 8:

f(mm)	3.46	SAG52(mm)	0.398
				FNO	2.0	SAG21(mm)	0.048
FOV (degree)	80.4	SAG22(mm)	0.105
				SL/TTL	0.92	FOV/CRA1.0Y	2.6
|f12/f45|	1.43	R5/f	1.0
				EPD/ImgH	0.59	DT11/DT52	0.37
SAG51(mm)	0.167	Zc52/Yc52	0.119

Referring to fig. 17, an image capturing module 100 according to an embodiment of the present invention includes the image capturing lens 10 and the photosensitive element 20 according to any one of the above embodiments. The photosensitive element 20 is disposed on the image side of the taking lens 10.

Specifically, the photosensitive element 20 may employ a Complementary Metal Oxide Semiconductor (CMOS) image sensor or a Charge-coupled device (CCD) image sensor.

The image capturing module 100 of the embodiment of the invention has reasonable lens configuration and satisfies the condition that SL/TTL is more than 0.9, so that the exit pupil is far away from the imaging surface, the light rays are arranged on the photosensitive element 20 in a manner of approaching vertical incidence, the telecentric characteristic is very important for the photosensitive capability of the solid electronic photosensitive element, the photosensitive sensitivity of the electronic photosensitive element can be improved, the possibility of generating a dark angle by the image capturing lens 10 is reduced, and the imaging quality is improved.

Referring to fig. 18, the electronic device 1000 includes a housing 200 and the image capturing module 100 of the above embodiment. The image capturing module 100 is mounted on the housing 200 to capture an image.

The electronic device 1000 of the embodiment of the invention has reasonable lens configuration and meets the requirement that SL/TTL is more than 0.9, so that the exit pupil is far away from the imaging surface, light rays are arranged on the photosensitive element in a mode of approaching vertical incidence, the electronic device has telecentric property, the telecentric property is very important for the photosensitive capability of the solid electronic photosensitive element, the photosensitive sensitivity of the electronic photosensitive element can be improved, the possibility of generating a dark angle by an image taking lens is reduced, and the imaging quality is improved. The housing 200 protects the image capturing module 100.

The electronic device 100 according to the embodiment of the present invention includes, but is not limited to, information terminal devices such as a smart phone, a mobile phone, a Personal Digital Assistant (PDA), a game machine, a Personal Computer (PC), a camera, a smart watch, a tablet PC, and home appliances having a photographing function.

In the description of the specification, reference to the terms "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention, which is defined by the claims and their equivalents.