CN110716283A

CN110716283A - Ultra-wide-angle lens, camera module and electronic device

Info

Publication number: CN110716283A
Application number: CN201810776683.8A
Authority: CN
Inventors: 邹海荣; 俞炳泽; 兰宾利
Original assignee: Nanchang OFilm Precision Optical Products Co Ltd
Current assignee: Nanchang OFilm Precision Optical Products Co Ltd
Priority date: 2018-07-13
Filing date: 2018-07-13
Publication date: 2020-01-21

Abstract

The invention discloses an ultra-wide-angle lens, a camera module and an electronic device. The super-wide-angle lens sequentially comprises a first lens with negative refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power and a fifth lens with refractive power from an object side to an image side. The ultra-wide-angle lens satisfies the following relational expression: D/2R₂<0.93; wherein D is an effective diameter of the first lens, R₂Is the radius of curvature of the image side surface of the first lens. The ultra-wide-angle lens, the camera module and the electronic device of the embodiment of the invention realize the wide-angle effect by the design of the first lens and the reasonable collocation of the other lenses, and the configuration of the first lens is more reasonable, thereby meeting the manufacturing requirement and further improving the yield.

Description

Ultra-wide-angle lens, camera module and electronic device

Technical Field

The present disclosure relates to optical imaging technologies, and particularly to an ultra-wide angle lens, a camera module and an electronic device.

Background

In order to obtain a larger field angle, the ultra-wide-angle lens is often assembled by matching a plurality of lenses, which is difficult to produce and process and low in yield.

Disclosure of Invention

The embodiment of the invention provides an ultra-wide-angle lens, a camera module and an electronic device. The super-wide-angle lens system of the present disclosure includes, in order from an object side to an image side, a first lens element with negative refractive power, a second lens element with negative refractive power, a third lens element with positive refractive power, a fourth lens element with positive refractive power, and a fifth lens element with refractive power. The ultra-wide-angle lens satisfies the following relational expression: D/2R₂<0.93; wherein D is an effective diameter of the first lens, R₂Is the radius of curvature of the image side surface of the first lens.

The ultra-wide-angle lens of the embodiment of the invention realizes the wide-angle effect by the design of the first lens and the reasonable collocation of the other lenses, and the configuration of the first lens is more reasonable, thereby being beneficial to production and processing, meeting the manufacturing requirement and further improving the yield.

In some embodiments, the first lens element is a meniscus lens element, the object-side surface of the first lens element is convex, the object-side surface and the image-side surface of the second lens element are both concave, the image-side surface of the third lens element is convex, and at least one of the surfaces of the fourth lens element and the fifth lens element is aspheric.

Therefore, the ultra-wide-angle lens can effectively reduce the total length of the ultra-wide-angle lens by adjusting the curvature radius and the aspheric coefficient of the surface of the lens, and the aberration of the ultra-wide-angle lens can be effectively corrected by using the diversified surface type, so that the imaging quality is improved.

In some embodiments, the ultra-wide angle lens satisfies the following relationship: f/f1< -0.16; wherein f is an effective focal length of the ultra-wide angle lens, and f1 is a focal length of the first lens.

Satisfying the above relation is advantageous for achieving a balance between the expansion of the field angle of the super-wide-angle lens and the shortening of the total optical length of the super-wide-angle lens.

In some embodiments, the ultra-wide angle lens further comprises an aperture, and the ultra-wide angle lens satisfies the following relationship: SL/TTL > 0.34; wherein, SL is the distance from the diaphragm to the imaging surface of the ultra-wide angle lens on the optical axis, and TTL is the distance from the object side surface of the first lens to the imaging surface on the optical axis.

When the relation is satisfied, the exit pupil of the ultra-wide-angle lens can be far away from the imaging surface, so that light rays can be incident on the photosensitive element in a mode of approaching vertical incidence, namely the telecentric characteristic of the image side, the telecentric characteristic is very important for the photosensitive capability of the solid-state electronic photosensitive element, the photosensitive sensitivity of the electronic photosensitive element can be improved, and the possibility of generating a dark angle by the ultra-wide-angle lens is reduced.

In some embodiments, the ultra-wide angle lens satisfies the following relationship: 1/2H-FOV is more than or equal to 95 degrees; and the H-FOV is the angle of view along the horizontal direction of the imaging surface of the ultra-wide-angle lens.

When the relation is satisfied, the ultra-wide-angle lens has a larger field angle so as to satisfy the requirements of electronic products such as mobile phones, cameras, vehicle-mounted lenses, monitoring lenses, medical lenses and the like on the large field angle.

In some embodiments, the ultra-wide angle lens satisfies the following relationship: f/f12< -0.5; wherein f is an effective focal length of the ultra-wide angle lens, and f12 is a combined focal length of the first lens and the second lens.

When the above relation is satisfied, the first lens element and the second lens element can effectively share the negative refractive power of the lens assembly, thereby avoiding the excessive refractive power configuration of the third lens element, the fourth lens element and the fifth lens element, and reducing the influence caused by the sensitivity, the manufacturing tolerance and the environmental factors of the ultra-wide angle lens.

In some embodiments, the ultra-wide angle lens satisfies the following relationship: -1< f/f3-f/f4< 1; and f is the effective focal length of the ultra-wide angle lens, f3 is the focal length of the third lens, and f4 is the focal length of the fourth lens.

When the relation is satisfied, the refractive powers of the third lens element and the fourth lens element are reasonable, so that the sensitivity of the super-wide angle lens to errors can be effectively controlled, and the aberration can be corrected. Meanwhile, the situation that the negative refractive power of the third lens is too small and the positive refractive power of the fourth lens is too large can be avoided, so that the influence of expansion and contraction caused by environmental temperature change on the lenses is prevented, and the imaging definition of the ultra-wide-angle lens in the temperature range of-40 ℃ to +85 ℃ is finally ensured.

In some embodiments, the ultra-wide angle lens satisfies the following relationship: -3<R₆/R₇<0; wherein R is₆Is the radius of curvature, R, of the image-side surface of the third lens₇Is the radius of curvature of the object side surface of the fourth lens.

When the above relation is satisfied, the fourth lens element is favorable for correcting the aberration from the third lens element and the super-wide-angle lens element, and the proper refractive power is adjusted to improve the resolution of the super-wide-angle lens element.

In some embodiments, the ultra-wide angle lens satisfies the following relationship: CT4/CT5< 4; wherein CT4 is a thickness of the fourth lens on an optical axis, and CT5 is a thickness of the fifth lens on the optical axis.

When the relation is satisfied, the thicknesses of the fourth lens and the fifth lens are reasonable, and the assembling space configuration of the ultra-wide-angle lens can be facilitated.

The camera module of the embodiment of the invention comprises the ultra-wide-angle lens and the photosensitive element, wherein the photosensitive element is arranged at the image side of the ultra-wide-angle lens.

The electronic device of the embodiment of the invention comprises a shell and the camera module of the embodiment, wherein the camera module is arranged on the shell and is used for acquiring images.

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 infrared lens according to a first embodiment of the present invention;

fig. 2 to 4 are a longitudinal aberration diagram (mm), a field curvature diagram (mm), and a distortion diagram (%), respectively, of the infrared lens in the first embodiment;

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

fig. 6 to 8 are a longitudinal aberration diagram (mm), a field curvature diagram (mm), and a distortion diagram (%), respectively, of the infrared lens in the second embodiment;

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

fig. 10 to 12 are a longitudinal aberration diagram (mm), a field curvature diagram (mm), and a distortion diagram (%), respectively, of the infrared lens in the third embodiment;

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

fig. 14 to 16 are a longitudinal aberration diagram (mm), a field curvature diagram (mm), and a distortion diagram (%), respectively, of the infrared lens in the fourth embodiment;

fig. 17 is a schematic structural diagram of an infrared lens according to a fifth embodiment of the present invention;

fig. 18 to 20 are a longitudinal aberration diagram (mm), a field curvature diagram (mm), and a distortion diagram (%), respectively, of the infrared lens in the fifth embodiment;

fig. 21 is a schematic structural diagram of an infrared lens according to a sixth embodiment of the present invention;

fig. 22 to 24 are a longitudinal aberration diagram (mm), a field curvature diagram (mm), and a distortion diagram (%), respectively, of the infrared lens in the sixth embodiment;

fig. 25 is a schematic structural diagram of an infrared lens according to a seventh embodiment of the present invention;

fig. 26 to 28 are a longitudinal aberration diagram (mm), a field curvature diagram (mm), and a distortion diagram (%), respectively, of the infrared lens in the seventh embodiment;

fig. 29 is a schematic structural view of an infrared lens according to an eighth embodiment of the present invention;

fig. 30 to 32 are a longitudinal aberration diagram (mm), a field curvature diagram (mm), and a distortion diagram (%), respectively, of the infrared lens in the first embodiment;

FIG. 33 is a schematic view of a camera module according to an embodiment of the present invention;

FIG. 34 is a schematic structural diagram of an electronic device according to an embodiment of the invention; and

fig. 35 is a schematic structural diagram of an electronic device according to another embodiment of the 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, 5, 9, 13, 17, 21, 25, and 29, the ultra-wide-angle lens 10 according to the embodiment of the present invention includes, in order from an object side to an image side, a first lens element L1 with negative refractive power, a second lens element L2 with negative refractive power, a third lens element L3 with positive refractive power, a fourth lens element L4 with positive refractive power, and a fifth lens element L5 with refractive power.

The first lens element L1 has an object-side surface S1 and an image-side surface S2, the second lens element L2 has an object-side surface S3 and an image-side surface S4, the third lens element L3 has an object-side surface S5 and an image-side surface S6, the fourth lens element L4 has an object-side surface S7 and an image-side surface S8, and the fifth lens element L1 has an object-side surface S1 and an image-side surface S2L5 has an object side S9 and an image side S10. The first lens element L1 is a meniscus lens element, the object-side surface S1 of the first lens element L1 is convex, the object-side surface S3 and the image-side surface S4 of the second lens element L2 are both concave, and the image-side surface S5 of the third lens element L3 is convex. The ultra-wide-angle lens 10 satisfies the following relationship: D/2R₂Less than or equal to 0.93; where D is the effective diameter of the first lens L1, and R₂Is the radius of curvature of the image-side surface S2 of the first lens L1. That is, D/2R₂And can be any value less than or equal to 0.93, for example, the value can be 0.1, 0.15, 0.25, 0.3, 0.45, 0.5, 0.55, 0.62, 0.72, 0.84, 0.9, 0.91, 0.92, 0.93, and the like. Preferably, D/2R₂<0.93，D/2R₂May be any value less than 0.93, for example, the value may be 0.1, 0.15, 0.25, 0.3, 0.45, 0.5, 0.55, 0.62, 0.72, 0.84, 0.9, 0.91, 0.92, and the like.

When the super-wide-angle lens 10 is used for imaging, light rays emitted or reflected by a subject OBJ enter the super-wide-angle lens 10 from the object side direction, sequentially pass through the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the infrared filter L6 having an object side surface S11 and an image side surface S12, and finally converge on the imaging surface S13. In other embodiments, the light rays pass through the infrared filter L6 and then continue to pass through the protective glass L7 having the object side S14 and the image side S15, and finally converge on the image plane S13.

The ultra-wide-angle lens 10 of the embodiment of the invention realizes a wide-angle effect by the design of the first lens L1 and the reasonable matching of other lenses, and the configuration of the first lens L1 is more reasonable, so that the manufacturing requirements are met, and the yield can be improved.

In some embodiments, the ultra-wide angle lens 10 further includes a stop STO. The 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 on the surface of any one of the lenses, or before the first lens L1, or between any two of the lenses, or between the fifth lens L5 and the infrared filter L6. For example, in the first to eighth embodiments, the stop STO is provided between the third lens L3 and the fourth lens L4.

In some embodiments, the ultra-wide angle lens 10 satisfies the following relationship: f/f1 is less than or equal to-0.16; where f1 is the focal length of the first lens L1. That is, f/f1 can be any value less than or equal to-0.16, e.g., the value can be-30, -25, -10, -9, -8, -7, -0.17, -0.16, etc. Preferably, f/f1< -0.16, that is, f/f1 can be any value less than-0.16, e.g., the value can be-30, -25, -10, -9, -8, -0.25, -0.21, -0.19, -0.17, etc.

Satisfying the above relationship is advantageous in achieving a balance between the expansion of the field angle of the super wide-angle lens 10 and the shortening of the total optical length of the super wide-angle lens 10.

In some embodiments, the ultra-wide angle lens 10 satisfies the following relationship: SL/TTL is more than or equal to 0.34; where SL is the distance on the optical axis from the stop STO to the image forming surface S13 (i.e., the photosensitive element 20) of the super-wide angle lens 10, and TTL is the distance on the optical axis from the object-side surface S1 of the first lens L1 to the image forming surface S13. That is, SL/TTL can be any value greater than or equal to 0.34, e.g., 0.34, 0.35, 0.36, 0.37, 0.52, 0.65, 0.7, 0.85, 0.9, 1, 2, 4, 7, 10, etc. Preferably, SL/TTL >0.34, that is, SL/TTL can be any value greater than 0.34, for example, the value can be 0.35, 0.42, 0.43, 0.52, 0.65, 0.7, 4, 7, 10, and so on.

When the above relation is satisfied, the exit pupil of the ultra-wide-angle lens 10 can be far away from the image plane, so the light will be incident on the photosensitive element 20 in a manner close to vertical incidence, which is the telecentric characteristic of the image plane, and the telecentric characteristic is very important for the photosensitive capability of the solid-state electronic photosensitive element, so that the photosensitive sensitivity of the electronic photosensitive element can be improved, and the possibility of generating a dark angle by the ultra-wide-angle lens 10 can be reduced.

In some embodiments, the ultra-wide angle lens 10 satisfies the following relationship: 1/2H-FOV is more than or equal to 92.5 degrees; the H-FOV is a field angle in the horizontal direction along the imaging plane of the ultra-wide-angle lens 10. That is, the 1/2H-FOV may be any angle greater than or equal to 92.5 degrees, for example, the values may be 92.5 degrees, 93 degrees, 93.5 degrees, 94 degrees, 95 degrees, 96 degrees, 97 degrees, 97.5 degrees, 98 degrees, 98.5 degrees, 99 degrees, and so forth. Preferably, 1/2H-FOV ≧ 95 degrees, that is, 1/2H-FOV can be any angle greater than or equal to 95 degrees, for example, the value can be 95 degrees, 96 degrees, 97 degrees, 97.5 degrees, 98 degrees, 98.5 degrees, 99 degrees, and so forth.

When the above relation is satisfied, the ultra-wide-angle lens 10 has a larger field angle, so as to satisfy the requirement of electronic products such as mobile phones, cameras, vehicle-mounted lenses, monitoring lenses, medical lenses, and the like for the large field angle.

In some embodiments, the ultra-wide angle lens 10 satisfies the following relationship: f/f12< -0.5; where f12 is the combined focal length of the first lens L1 and the second lens L2. That is, f/f12 can be any value less than-0.5, e.g., the value can be-30, -25, -0.58, -0.56, -0.55, -0.53, -0.51, etc.

When the above relationship is satisfied, the first lens element L1 and the second lens element L2 can effectively share the negative refractive power of the ultra-wide-angle lens 10, so as to avoid the excessive refractive power configurations of the third lens element L3, the fourth lens element L4, and the fifth lens element L5, thereby reducing the influence caused by the sensitivity, the manufacturing tolerance, and the environmental factors of the ultra-wide-angle lens 10.

In some embodiments, the ultra-wide angle lens 10 satisfies the following relationship: -1< f/f3-f/f4< 1; where f is an effective focal length of the ultra-wide angle lens 10, f3 is a focal length of the third lens L3, and f4 is a focal length of the fourth lens L4. That is, f/f3-f/f4 may be any number between the intervals (-1, 1), e.g., -0.98, -0.95, -0.9, -0.8, -0.6, -0.5, -0.45, -0.4, 0.5, 0.55, 0.6, 0.7, 0.8, 0.9, 0.95, etc.

When the above-mentioned relational expression is satisfied, the refractive powers of the third lens element L3 and the fourth lens element L4 are reasonable, so that the sensitivity of the ultra-wide-angle lens 10 to errors can be effectively controlled, and aberrations can be corrected. Meanwhile, the situation that the negative refractive power of the third lens element L3 is too small and the positive refractive power of the fourth lens element L4 is too large can be avoided, so that the influence of expansion with heat and contraction with cold caused by changes in ambient temperature on the lens elements is prevented, and the imaging definition of the ultra-wide angle lens 10 in the temperature range of-40 ℃ to +85 ℃ is finally ensured.

In some implementationsIn this way, the ultra-wide angle lens 10 satisfies the following relationship: -3<R₆/R₇<0; wherein R is₆Is the radius of curvature, R, of the image-side surface S6 of the third lens L3₇Is the radius of curvature of the object-side surface S7 of the fourth lens S4. That is, R₆/R₇Can be any number between the intervals (-3, 0), e.g., the value can be-2.8, -2.5, -2.13, -2.03, -2, -1.98, -1.8, -0.65, -0.5, -0.2, -0.05, etc.

When the above relation is satisfied, it is beneficial for the fourth lens element L4 to correct the aberration from the third lens element L3 and the super-wide-angle lens element 10, and adjust the appropriate refractive power to improve the resolving power of the super-wide-angle lens element 10.

In some embodiments, the ultra-wide angle lens 10 satisfies the following relationship: CT4/CT5< 4; where CT4 is the thickness of the fourth lens L4 on the optical axis, and CT5 is the thickness of the fifth lens L5 on the optical axis. That is, CT4/CT5 may be any value less than 4, for example, the value may be 0.1, 0.3, 0.5, 3.5, 3.8, 3.9, and so forth.

When the above-mentioned relational expressions are satisfied, the thicknesses of the fourth lens element L4 and the fifth lens element L5 are reasonable, which contributes to the space configuration of the super-wide-angle lens 10.

In some embodiments, the ultra-wide angle lens 10 satisfies the following relationship: FNO is less than or equal to 2.25; wherein FNO is an f-number (stop value). That is, FNO can be any value less than or equal to 2.25, for example, the value can be 0.1, 0.3, 0.5, 0.8, 1, 2.15, 2.22, 2.24, 2.25, and so forth. Preferably, FNO <2.25, that is, FNO can be any value less than 2.25, for example, the value can be 0.1, 0.3, 0.5, 1.8, 2, 2.1, 2.2, 2.24, and so forth.

Thus, the ultra-wide-angle lens 10 has a large aperture value and a large amount of light entering.

In some embodiments, the material of the first lens L1 is glass, and the materials of the second lens L2, the third lens L3, the fourth lens L4 and the fifth lens L5 are all plastic.

Through the reasonable matching of the materials of the first lens L1 to the fifth lens L5, the ultra-wide angle lens 10 can realize ultra-thinning while effectively eliminating aberration and satisfying high pixel requirements, and has low cost.

In some embodiments, at least one surface of the fourth lens L4 and the fifth lens L5 in the ultra-wide angle lens 10 is aspheric. For example, in the first embodiment, both the object-side surface and the image-side surface of the fourth lens L4 and the fifth lens L5 are aspheric.

In some embodiments, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 are all aspherical mirrors. 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 ultra-wide-angle lens 10 can effectively reduce the total length of the ultra-wide-angle lens 10 by adjusting the curvature radius and the aspheric coefficient of each lens surface, and can effectively correct the aberration of the ultra-wide-angle lens 10 and improve the imaging quality. In addition, the use of the diversified surface types can effectively correct the aberration of the ultra-wide angle lens 10, and improve the imaging quality.

First embodiment

Referring to fig. 1 to 4, the super-wide angle lens 10 of the first embodiment includes, from an object side to an image side, 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 negative refractive power is made of glass, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 with negative refractive power is made of plastic, and has a concave object-side surface S3 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 plane surface along the circumference, and a convex image-side surface S6. The fourth lens element L4 with positive refractive power is made of plastic, and has a convex object-side surface S7, a convex image-side surface S8 along the optical axis and a concave surface along the circumference. The fifth lens element L5 with positive refractive power is made of plastic, and has a concave object-side surface S9 and a convex image-side surface S10.

The stop STO is disposed between the third lens L3 and the fourth lens L4. The f-number FNO of the ultra-wide angle lens 10 is 2.25.

The infrared 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 ultra-wide-angle lens 10.

In the first embodiment, the effective focal length f of the ultra-wide angle lens 10 is 0.99, the f-number of the ultra-wide angle lens 10 is 2.25, and the horizontal field angle H-FOV of the imaging surface S13 of the ultra-wide angle lens 10 is 190 degrees. The ultra-wide-angle lens 10 satisfies the following conditions: D/2R₂＝0.93；f/f1＝-0.17；SL/TTL＝0.34；f/f12＝-071；f/f3-f/f4＝0.11；R₆/R₇＝-0.65；CT4/CT5＝0.7。

The ultra-wide angle lens 10 satisfies the conditions of the following table:

TABLE 1

TABLE 2

Second embodiment

Referring to fig. 5 to 8, the super-wide angle lens 10 of the second embodiment includes, from an object side to an image side, 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 negative refractive power is made of glass, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 with negative refractive power is made of plastic, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element L3 with positive 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 convex 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 and a convex image-side surface S10.

The stop STO is disposed between the third lens L3 and the fourth lens L4. The f-number FNO of the ultra-wide angle lens 10 is 2.1.

The infrared 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 ultra-wide-angle lens 10. The ultra-wide angle lens 10 satisfies the conditions of the following table:

TABLE 3

TABLE 4

The following data can be obtained from tables 3 and 4:

f(mm)	1	SL/TTL	0.34
				FNO	2.1	f/f12	-0.62
H-FOV (degree)	190	f/f3-f/f4	-0.38
				D/2R₂	0.92	R₆/R₇	-1.61
f/f1	-0.19	CT4/CT5	2.06

Third embodiment

Referring to fig. 9 to 12, the super-wide angle lens 10 of the third embodiment includes, from an object side to an image side, 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 stop STO is disposed between the third lens L3 and the fourth lens L4. The f-number FNO of the ultra-wide angle lens 10 is 2.05.

TABLE 5

TABLE 6

The following data can be obtained from tables 5 and 6:

f(mm)	0.98	SL/TTL	0.37
				FNO	2.05	f/f12	-0.67
H-FOV (degree)	190	f/f3-f/f4	-0.4
				D/2R₂	0.92	R₆/R₇	-1.46
f/f1	-0.17	CT4/CT5	1.39

Fourth embodiment

Referring to fig. 13 to 16, the ultra-wide angle lens 10 of the fourth embodiment includes, from an object side to an image side, 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 negative refractive power is made of glass, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 with negative refractive power is made of plastic, and has a concave object-side surface S3 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 and a convex image-side surface S6. The fourth lens element L4 with positive refractive power is made of plastic, and has a convex 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 and a convex image-side surface S10.

The stop STO is disposed between the third lens L3 and the fourth lens L4. The f-number FNO of the ultra-wide angle lens 10 is 2.2.

TABLE 7

TABLE 8

The following data can be obtained from tables 7 and 8:

f(mm)	0.98	SL/TTL	0.37
				FNO	2.2	f/f12	-0.67
H-FOV (degree)	190	f/f3-f/f4	-0.37
				D/2R₂	0.92	R₆/R₇	-2.03
f/f1	-0.16	CT4/CT5	3.25

Fifth embodiment

Referring to fig. 17 to 20, the ultra-wide angle lens 10 of the fifth embodiment includes, from an object side to an image side, 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.

TABLE 9

Watch 10

From tables 9 and 10, the following data can be obtained:

f(mm)	0.98	SL/TTL	0.35
				FNO	2.1	f/f12	-0.59
H-FOV (degree)	190	f/f3-f/f4	-0.35
				D/2R₂	0.92	R₆/R₇	-2.13
f/f1	-0.16	CT4/CT5	2.83

Sixth embodiment

Referring to fig. 21 to 24, the ultra-wide angle lens 10 of the sixth embodiment includes, from an object side to an image side, 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.

TABLE 11

TABLE 12

From tables 11 and 12, the following data can be obtained:

f(mm)	0.98	SL/TTL	0.39
				FNO	2.1	f/f12	-0.55
H-FOV (degree)	185	f/f3-f/f4	-0.35
				D/2R₂	0.8	R₆/R₇	-1.76
f/f1	-0.17	CT4/CT5	2.48

Seventh embodiment

Referring to fig. 25 to 28, the ultra-wide angle lens 10 of the seventh embodiment includes, from an object side to an image side, 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 negative refractive power is made of glass, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 with negative refractive power is made of plastic, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element L3 with positive 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 convex 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, a convex image-side surface S10 and an optical axis, and a concave surface at its circumference.

watch 13

TABLE 14

From tables 13 and 14, the following data can be obtained:

f(mm)	0.97	SL/TTL	0.35
				FNO	2.1	f/f12	-0.55
H-FOV (degree)	185	f/f3-f/f4	-0.38
				D/2R₂	0.92	R₆/R₇	-1.98
f/f1	-0.17	CT4/CT5	1.4

Eighth embodiment

Referring to fig. 29 to 32, the ultra-wide angle lens 10 of the eighth embodiment includes, from an object side to an image side, 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 negative refractive power is made of glass, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 with negative refractive power is made of plastic, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element L3 with positive 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 convex 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 and a convex image-side surface S8.

The protective glass L7 is made of glass and is disposed between the infrared filter L6 and the image plane S13.

The ultra-wide angle lens 10 satisfies the conditions of the following table:

watch 15

TABLE 16

From tables 15 and 16, the following data can be obtained:

f(mm)	0.98	SL/TTL	0.36
				FNO	2.1	f/f12	-0.56
H-FOV (degree)	185	f/f3-f/f4	-0.28
				D/2R₂	0.92	R₆/R₇	-1.25
f/f1	-0.17	CT4/CT5	2.25

Referring to fig. 33, a camera module 100 according to an embodiment of the invention includes the ultra-wide-angle lens 10 according to any of the above embodiments and a light-sensing element 20, wherein the light-sensing element 20 is disposed on an image side of the ultra-wide-angle 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.

Referring to fig. 34 and 35, an electronic device 1000 according to an embodiment of the invention includes a housing 200 and the camera module 100 according to the above embodiment, and the camera module 100 is mounted on the housing 200 for capturing an image.

The camera module 100 is disposed in the housing 200 and exposed from the housing 200 to obtain a depth image, the housing 200 can provide protection for the camera module 100, such as dust prevention, water prevention, and falling prevention, and the housing 200 is provided with a hole corresponding to the camera module 100, so that light rays can penetrate out of the hole or penetrate into the housing 200. In another embodiment, the camera module 100 is housed in the housing 200 and can be extended from the housing 200, and in this case, the housing 200 does not need to be provided with a hole corresponding to the light entering direction of the camera module 100. When the camera module 100 needs to be used, the camera module 100 extends out of the housing 200 from the inside of the housing 200; when the camera module 100 is not needed, the camera module 100 is accommodated in the housing 200 from the outside of the housing 200. In another embodiment, the camera module 100 is housed in the housing 200 and positioned below the display screen, and in this case, it is not necessary to form a hole in the housing 200 corresponding to the light entering direction of the camera module 100.

The electronic device 1000 according to the embodiment of the present invention includes, but is not limited to, an in-vehicle lens (see fig. 34), a smart phone (see fig. 35), a mobile phone, a Personal Digital Assistant (PDA), a game machine, an information terminal device such as a Personal Computer (PC), a camera, a smart watch, or a home appliance 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.

Claims

1. A super wide-angle lens, comprising in order from an object side to an image side:

a first lens element with negative refractive power;

a second lens element with negative refractive power;

a third lens element with positive refractive power;

a fourth lens element with positive refractive power; and

a fifth lens element with refractive power;

the ultra-wide-angle lens satisfies the following relational expression:

D/2R₂<0.93；

wherein D is an effective diameter of the first lens, R₂Is the radius of curvature of the image side surface of the first lens.

2. The ultra-wide angle lens of claim 1, wherein the first lens element is a meniscus lens element, the first lens element has a convex object-side surface, the second lens element has a concave object-side surface and a concave image-side surface, the third lens element has a convex image-side surface, and at least one of the surfaces of the fourth and fifth lens elements is aspheric.

3. The ultra-wide angle lens of claim 1, wherein the ultra-wide angle lens satisfies the following relationship:

f/f1<-0.16；

wherein f is an effective focal length of the ultra-wide angle lens, and f1 is a focal length of the first lens.

4. The ultra-wide angle lens of claim 1, further comprising a stop, wherein the ultra-wide angle lens satisfies the following relationship:

SL/TTL>0.34；

wherein, SL is the distance from the diaphragm to the imaging surface of the ultra-wide angle lens on the optical axis, and TTL is the distance from the object side surface of the first lens to the imaging surface on the optical axis.

5. The ultra-wide angle lens of claim 1, wherein the ultra-wide angle lens satisfies the following relationship:

1/2H-FOV is more than or equal to 95 degrees;

and the H-FOV is the angle of view along the horizontal direction of the imaging surface of the ultra-wide-angle lens.

6. The ultra-wide angle lens of claim 1, wherein the ultra-wide angle lens satisfies the following relationship:

f/f12<-0.5；

wherein f is an effective focal length of the ultra-wide angle lens, and f12 is a combined focal length of the first lens and the second lens.

7. The ultra-wide angle lens of claim 1, wherein the ultra-wide angle lens satisfies the following relationship:

-1<f/f3-f/f4<1；

and f is the effective focal length of the ultra-wide angle lens, f3 is the focal length of the third lens, and f4 is the focal length of the fourth lens.

8. The ultra-wide angle lens of claim 1, wherein the ultra-wide angle lens satisfies the following relationship:

-3<R₆/R₇<0；

wherein R is₆Is the radius of curvature, R, of the image-side surface of the third lens₇Is the radius of curvature of the object side surface of the fourth lens.

9. The ultra-wide angle lens of claim 1, wherein the ultra-wide angle lens satisfies the following relationship:

CT4/CT5<4；

wherein CT4 is a thickness of the fourth lens on an optical axis, and CT5 is a thickness of the fifth lens on the optical axis.

10. A camera module, comprising:

the ultra-wide angle lens of any of claims 1-9; and

and the photosensitive element is arranged on the image side of the ultra-wide-angle lens.

11. An electronic device, comprising:

a housing; and

the camera module of claim 10, mounted on the housing for capturing images.