CN111221096B - Ultra-wide-angle lens, camera module and electronic device - Google Patents
Ultra-wide-angle lens, camera module and electronic device Download PDFInfo
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/04—Reversed telephoto objectives
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/28—Interference filters
- G02B5/281—Interference filters designed for the infrared light
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
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- G—PHYSICS
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- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/02—Diaphragms
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 element with negative refractive power, a second lens element with positive refractive power, a third lens element, a fourth lens element with negative refractive power, a fifth lens element with positive refractive power and a sixth lens element with negative refractive power from an object side to an image side along an optical axis. The first lens is a meniscus lens with a convex object side. The object-side surface and the image-side surface of the third lens are convex surfaces. The object side surface and the image side surface of the fourth lens are both concave surfaces. According to the ultra-wide-angle lens disclosed by the embodiment of the invention, through reasonable lens configuration, the ultra-thinning of the ultra-wide-angle lens can be realized on the premise of ensuring a larger field angle and higher imaging quality, and the miniaturization of the ultra-wide-angle lens is facilitated.
Description
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
At present, the ultra-wide-angle lens generally has a larger volume for a larger field angle and higher imaging quality, and is difficult to realize miniaturization.
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 of the present disclosure includes, in order from an object side to an image side along an optical axis, a first lens element with negative refractive power, a second lens element with positive refractive power, a third lens element, a fourth lens element with negative refractive power, a fifth lens element with positive refractive power, and a sixth lens element with negative refractive power. The first lens is a meniscus lens with a convex object side. The object side surface and the image side surface of the third lens are convex surfaces. The object side surface and the image side surface of the fourth lens are both concave surfaces.
According to the ultra-wide-angle lens disclosed by the embodiment of the invention, through reasonable lens configuration, the ultra-thinning of the ultra-wide-angle lens can be realized on the premise of ensuring a larger field angle and higher imaging quality, and the miniaturization of the ultra-wide-angle lens is facilitated.
In some embodiments, the ultra-wide angle lens further satisfies the following conditional expression: 3.5< | f1/f | <4.5; and f is the focal length of the ultra-wide angle lens, and f1 is the focal length of the first lens.
When the ultra-wide-angle lens meets the conditional expression of 3.5< | f1/f | <4.5, the first lens can provide proper negative refractive power for the ultra-wide-angle lens, so that the reduction of the sensitivity of the ultra-wide-angle lens, the optimization of aberration and the improvement of imaging quality are facilitated.
In some embodiments, the ultra-wide angle lens further satisfies the following conditional expression: 5.0< | R1/R2| <7.0; wherein R1 is a radius of curvature of an object-side surface of the first lens element, and R2 is a radius of curvature of an image-side surface of the first lens element.
When the ultra-wide-angle lens meets the conditional expression of 5.0< | R1/R2| <7.0, the first lens has a proper size, the processing and manufacturing of the first lens and the assembly of the ultra-wide-angle lens are facilitated, and the product yield is improved. In addition, the curvature radius of the object side surface and the curvature radius of the image side surface of the first lens are reasonably distributed, so that aberration balance can be maintained, and imaging quality is improved.
In some embodiments, the ultra-wide angle lens further satisfies the following conditional expression: 120 degrees < FOV <170 degrees; wherein, the FOV is the field angle of the ultra-wide angle lens.
The ultra-wide-angle lens has a large field angle when satisfying the conditional expression 120 < FOV < 170.
In some embodiments, the ultra-wide angle lens further includes a stop disposed between the second lens and the third lens.
The super wide-angle lens can better control the light entering amount and improve the imaging effect through reasonable diaphragm setting.
In some embodiments, at least one surface of the first lens to the sixth lens is aspheric.
The super wide-angle lens can effectively reduce the total length of the super wide-angle lens by adjusting the curvature radius and the aspheric surface coefficient of the surface of the lens, and the aberration of the super wide-angle lens can be effectively corrected by using the diversified surface types, so that the imaging quality is improved.
In some embodiments, the first to sixth lenses are glass lenses or plastic lenses.
The cost of the plastic lens is low, which is beneficial to reducing the cost of the whole super wide-angle lens; the glass lens is not easy to expand with heat and contract with cold due to the change of the environmental temperature, so that the imaging quality of the ultra-wide angle lens is stable.
In some embodiments, the ultra-wide angle lens further includes an infrared filter disposed between the sixth lens and the imaging surface.
The infrared filter can filter the influence of infrared light in ambient light on imaging, and only allows visible light to pass through, thereby improving the imaging quality.
The camera module of the embodiment of the invention comprises the ultra-wide-angle lens and the photosensitive element in any one of the above embodiments. The photosensitive element is arranged on the image side of the ultra-wide-angle lens.
According to the camera module, due to reasonable lens configuration, the ultra-thin of the ultra-wide-angle lens can be realized on the premise of ensuring a larger field angle and higher imaging quality, and the miniaturization of the ultra-wide-angle lens is facilitated.
The electronic device of the embodiment of the invention comprises a shell and the camera module of the embodiment. The camera module is mounted on the housing.
According to the electronic device provided by the embodiment of the invention, through reasonable lens configuration, the ultra-thinning of the ultra-wide-angle lens can be realized on the premise of ensuring a larger field angle and higher imaging quality, and the miniaturization of the ultra-wide-angle lens is facilitated. And the shell can play the protective action to the camera module.
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 ultra-wide angle lens according to a first embodiment of the present invention;
FIG. 2 is a diagram of the diffraction modulation transfer function of the ultra-wide-angle lens in the first embodiment of the present invention
Fig. 3 to 5 are a longitudinal aberration diagram (mm), a field curvature diagram (mm), and a distortion diagram (%), respectively, of the ultra-wide angle lens in the first embodiment;
FIG. 6 is a schematic structural diagram of an ultra-wide angle lens in a second embodiment of the present invention;
FIG. 7 is a diagram of the diffraction modulation transfer function of an ultra-wide-angle lens according to a second embodiment of the present invention
Fig. 8 to 10 are a longitudinal aberration diagram (mm), a field curvature diagram (mm), and a distortion diagram (%), respectively, of the ultra-wide angle lens in the second embodiment;
fig. 11 is a schematic structural view of an ultra-wide angle lens according to a third embodiment of the present invention;
FIG. 12 is a diagram of the diffraction modulation transfer function of an ultra-wide-angle lens in a third embodiment of the present invention
Fig. 13 to 15 are a longitudinal aberration diagram (mm), a field curvature diagram (mm), and a distortion diagram (%), respectively, of the ultra-wide angle lens in the third embodiment;
FIG. 16 is a schematic view of a camera module according to an embodiment of the present invention; and
fig. 17 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 to implicitly indicate the number of technical features indicated. Thus, features defined as "first" and "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. The first feature being "under," "beneath," and "under" the 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 will recognize the application of other processes and/or the use of other materials.
Referring to fig. 1, fig. 6 and fig. 11, the ultra-wide angle lens assembly 10 according to the embodiment of the 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 positive refractive power, a third lens element L3, a fourth lens element L4 with negative refractive power, a fifth lens element L5 with positive refractive power and a sixth lens element L6 with negative refractive power.
The first lens element L1 has an object-side surface S1 and an image-side surface S2, and the first lens element L1 is a meniscus lens element with a convex object-side surface, i.e., the object-side surface S1 is a convex surface and the image-side surface S2 is a concave surface. The second lens 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, and both the object-side surface S5 and the image-side surface S6 are convex. The fourth lens element L4 has an object-side surface S7 and an image-side surface S8, and both the object-side surface S7 and the image-side surface S8 of the fourth lens element L4 are concave. The fifth lens L5 has an object-side surface S9 and an image-side surface S10. The sixth lens L6 has an object-side surface S11 and an image-side surface S12.
The ultra-wide-angle lens 10 according to the embodiment of the present invention can realize the ultra-thin ultra-wide-angle lens 10 by a reasonable lens configuration on the premise of ensuring a large field angle and high imaging quality, and is advantageous to miniaturizing the ultra-wide-angle lens 10.
In some embodiments, the ultra-wide angle lens 10 further satisfies the following conditional expression: 3.5< | f1/f | <4.5; where f is a focal length of the ultra-wide angle lens 10, and f1 is a focal length of the first lens L1. That is, | f1/f | may be any numerical value between intervals (3.5, 4.5), for example, the value may be 3.865, 4.045, 4.179, 4.278, 4.484, and so on.
When the ultra-wide-angle lens 10 satisfies the conditional expression 3.5< | f1/f | <4.5, the first lens L1 can provide a suitable negative refractive power for the ultra-wide-angle lens 10, which is beneficial to reducing the sensitivity of the ultra-wide-angle lens 10, optimizing aberration, and improving imaging quality.
In some embodiments, the ultra-wide angle lens 10 further satisfies the following conditional expression: 5.0< | R1/R2| <7.0; where R1 is a radius of curvature of the object-side surface S1 of the first lens L1, and R2 is a radius of curvature of the image-side surface S2 of the first lens L1. That is, | R1/R2| may be any number within the interval (5.0, 7.0), for example, the value may be 5.548, 5.836, 6.252, 6.556, 6.985, and so on.
When the ultra-wide angle lens 10 satisfies the conditional expression 5.0< | R1/R2| <7.0, the first lens L1 has a suitable size, which is beneficial to the processing and manufacturing of the first lens L1 and the assembly of the ultra-wide angle lens 10, and improves the product yield. In addition, the super-wide angle lens 10 can maintain the aberration balance and improve the imaging quality by reasonably distributing the curvature radii of the object side surface S1 and the image side surface S2 of the first lens L1.
In some embodiments, the ultra-wide angle lens 10 further satisfies the following conditional expression: 120 degrees < FOV <170 degrees; the FOV is the angle of view of the ultra-wide-angle lens 10. That is, the FOV may be any number of degrees within an interval (120 degrees, 170 degrees), e.g., the FOV may be 130 degrees, 145 degrees, 150 degrees, 160 degrees, 165 degrees, etc.
The ultra-wide-angle lens 10 has a large angle of view when satisfying the conditional expression 120 degrees < FOV <170 degrees.
In some embodiments, the ultra-wide angle lens 10 further includes an optical filter L7. The filter L7 is disposed between the sixth lens L6 and the image forming surface S15. In the embodiment of the invention, the filter L7 is an infrared filter L7, the infrared filter L7 includes an object side surface S11 and an image side surface S12, and the infrared filter L7 is used for filtering infrared light. When the super-wide-angle lens 10 is used for imaging, light emitted or reflected by a subject enters the super-wide-angle lens 10 from the 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, the sixth lens L6 and the infrared filter L7, and finally converges on the imaging surface S15. The infrared filter L7 can filter the influence of infrared light in ambient light on imaging, and only allow visible light to pass through, thereby improving the imaging quality of visible light.
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 and the first lens L1, or on the surface of any one of the lenses, or between any two of the lenses, or between the sixth lens L6 and the infrared filter L7. The stop STO of the embodiment of the present invention is disposed between the second lens L2 and the third lens L3. For example, in the first to third embodiments, the stop STO is disposed between the second lens L2 and the third lens L3, so that the amount of light entering can be better controlled and the imaging effect can be improved.
In some embodiments, the first to sixth lenses L1 to L6 are plastic lenses or glass lenses.
The cost of the plastic lens is low, which is beneficial to reducing the cost of the whole super-wide-angle lens 10; the glass lens is not easy to expand with heat or contract with cold due to the change of the environmental temperature, so that the imaging quality of the ultra-wide angle lens 10 is relatively stable.
In some embodiments, at least one surface of the first lens L1 to the sixth lens L6 in the ultra-wide angle lens 10 is an aspherical surface. For example, in the first to third embodiments, the object-side surface and the image-side surface of the first lens L1 are both spherical, and the object-side surface and the image-side surface of the second to sixth lenses L2 to L6 are both aspherical. 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 aberration and improve imaging quality.
First embodiment
Referring to fig. 1 to 5, from the object side to the image side, the super-wide-angle lens 10 of the first embodiment sequentially includes a first lens L1, a second lens L2, a stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an infrared filter L7.
The first lens element L1 with negative refractive power has a convex object-side surface S1 and a concave image-side surface S2, and both the object-side surface S1 and the image-side surface S2 are spherical. The second lens element L2 with positive refractive power has a convex object-side surface S3 and a convex image-side surface S4, and both the object-side surface S3 and the image-side surface S4 are aspheric. The third lens element L3 with positive refractive power has a convex object-side surface S5 and a convex image-side surface S6, and both the object-side surface S5 and the image-side surface S6 are aspheric. The fourth lens element L4 with negative refractive power has a concave object-side surface S7 and a concave image-side surface S8, and the object-side surface S7 and the image-side surface S8 are aspheric. The fifth lens element L5 with positive refractive power has a concave object-side surface S9 and a convex image-side surface S10, and both the object-side surface S9 and the image-side surface S10 are aspheric. The sixth lens element L6 with negative refractive power has a convex object-side surface S11 and a concave image-side surface S12, and both the object-side surface S11 and the image-side surface S12 are aspheric.
The infrared filter L7 is made of glass, is disposed between the sixth lens element L6 and the image plane S15, and does not affect the focal length of the ultra-wide-angle lens assembly 10.
The focal length of the ultra-wide angle lens 10 is f =1.089mm. The f-number FNO of the ultra-wide angle lens 10 =1.9. The field angle FOV =160 degrees of the ultra-wide angle lens 10. The length of the diagonal line of the photosensitive element (shown in fig. 16) was 2y =4.540mm. The total optical length of the ultra-wide-angle lens 10 (i.e., the distance from the object-side surface S1 of the first lens element L1 to the image plane S15 on the optical axis) is TTL =9.161mm.
The optical back focus of the ultra-wide-angle lens 10 is BFL =0.422mm, the mechanical back focus of the ultra-wide-angle lens 10 is FFL =2.756mm, the image height distortion of the ultra-wide-angle lens 10 is IMG DIS =0.437mm, and the maximum imaging height of the image plane in the ultra-wide-angle lens 10 is HT =10.464mm. The mechanical field angle of the ultra-wide angle lens 10 is ANG =84.058 degrees. In the entrance pupil of the ultra-wide angle lens 10, the aperture is DIA1=0.579mm, and the thickness is THI1=3.098mm. In the exit pupil of the ultra-wide-angle lens 10, the aperture is DIA2=1.845mm, and the thickness is THI2= -3.046mm.
The ultra-wide angle lens 10 also satisfies the following conditions: i f1/f | =4.278; R1/R2| =5.836.
The ultra-wide angle lens 10 satisfies the conditions of the following table:
TABLE 1
TABLE 2
Second embodiment
Referring to fig. 6 to 10, the super-wide-angle lens 10 of the second embodiment includes, in order from an object side to an image side, a first lens element L1, a second lens element L2, a stop STO, a third lens element L3, a fourth lens element L4, a fifth lens element L5, a sixth lens element L6, and an infrared filter L7.
The first lens element L1 with negative refractive power has a convex object-side surface S1 and a concave image-side surface S2, and both the object-side surface S1 and the image-side surface S2 are spherical. The second lens element L2 with positive refractive power has a convex object-side surface S3 and a convex image-side surface S4, and both the object-side surface S3 and the image-side surface S4 are aspheric. The third lens element L3 with positive refractive power has a convex object-side surface S5 and a convex image-side surface S6, and both the object-side surface S5 and the image-side surface S6 are aspheric. The fourth lens element L4 with negative refractive power has a concave object-side surface S7 and a concave image-side surface S8, and the object-side surface S7 and the image-side surface S8 are aspheric. The fifth lens element L5 with positive refractive power has a concave object-side surface S9 and a convex image-side surface S10, and both the object-side surface S9 and the image-side surface S10 are aspheric. The sixth lens element L6 with negative refractive power has a convex object-side surface S11 and a concave image-side surface S12, and both the object-side surface S11 and the image-side surface S12 are aspheric.
The infrared filter L7 is made of glass, is disposed between the sixth lens element L6 and the image plane S15, and does not affect the focal length of the ultra-wide-angle lens assembly 10.
The ultra-wide angle 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) | 1.067 | IMGDIS(mm) | 0.437 |
| fno | 1.9 | OAL(mm) | 8.669 |
| FOV (degree) | 160 | HT(mm) | 10.889 |
| TTL(mm) | 9.106 | ANG (rotation angle) | 84.405 |
| |f1/f| | 4.179 | DIA1(mm) | 0.567 |
| |R1/R2| | 6.252 | THI1(mm) | 3.090 |
| 2y(mm) | 4.540 | DIA2(mm) | 1.968 |
| BFL(mm) | 0.422 | THI2(mm) | -3.278 |
| FFL(mm) | 2.782 |
Third embodiment
Referring to fig. 11 to 15, the super-wide-angle lens 10 of the second embodiment includes, in order from an object side to an image side, a first lens element L1, a second lens element L2, a stop STO, a third lens element L3, a fourth lens element L4, a fifth lens element L5, a sixth lens element L6, and an infrared filter L7.
The first lens element L1 with negative refractive power has a convex object-side surface S1 and a concave image-side surface S2, and both the object-side surface S1 and the image-side surface S2 are spherical. The second lens element L2 with positive refractive power has a convex object-side surface S3 and a convex image-side surface S4, and both the object-side surface S3 and the image-side surface S4 are aspheric. The third lens element L3 with positive refractive power has a convex object-side surface S5 and a convex image-side surface S6, and both the object-side surface S5 and the image-side surface S6 are aspheric. The fourth lens element L4 with negative refractive power has a concave object-side surface S7 and a concave image-side surface S8, and the object-side surface S7 and the image-side surface S8 are aspheric. The fifth lens element L5 with positive refractive power has a concave object-side surface S9 and a convex image-side surface S10, and both the object-side surface S9 and the image-side surface S10 are aspheric. The sixth lens element L6 with negative refractive power has a convex object-side surface S11 and a concave image-side surface S12, and both the object-side surface S11 and the image-side surface S12 are aspheric.
The infrared filter L7 is made of glass, and is disposed between the sixth lens element L6 and the image plane S15 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 5
TABLE 6
The following data are available from tables 5 and 6:
referring to fig. 16, a camera module 100 according to an embodiment of the present invention includes the ultra-wide-angle lens 10 and the photosensitive element 20 according to any of the above embodiments. The light-sensing element 20 is disposed on the image side of the ultra-wide angle lens 10.
Specifically, the photosensitive element 20 may be a Complementary Metal Oxide Semiconductor (CMOS) image sensor or a Charge-coupled Device (CCD) image sensor.
The camera module 100 according to the embodiment of the present invention can realize the ultra-thin super-wide angle lens 10 by reasonable lens configuration on the premise of ensuring a large field angle and high imaging quality, and is advantageous to miniaturizing the super-wide angle lens 10.
Referring to fig. 16 and 17, the electronic device 1000 includes a housing 200 and the camera module 100 of the above embodiment. The camera module 100 is mounted on the housing 200 to acquire an image.
The electronic device 1000 according to the embodiment of the present invention can realize the ultra-thin super-wide angle lens 10 by reasonable lens configuration on the premise of ensuring a large field angle and high imaging quality, and is advantageous for the miniaturization of the super-wide angle lens 10. The housing 200 protects the camera 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 present specification, reference to the description of the terms "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," 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 described. 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 will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make variations, 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 (9)
1. A super wide-angle lens, comprising, in order from an object side to an image side along an optical axis:
a first lens element with negative refractive power, the first lens element being a meniscus lens element with a convex object-side surface;
a second lens element with positive refractive power;
the object side surface and the image side surface of the third lens are convex surfaces;
a fourth lens element with negative refractive power having a concave object-side surface and a concave image-side surface;
a fifth lens element with positive refractive power; and
a sixth lens element with negative refractive power;
the ultra-wide angle lens meets the following conditional expression:
3.5<|f1/f|<4.5；
and f is the focal length of the ultra-wide angle lens, and f1 is the focal length of the first lens.
2. The ultra-wide angle lens according to claim 1, wherein the ultra-wide angle lens satisfies the following conditional expression:
5.0<|R1/R2|<7.0；
wherein R1 is a radius of curvature of an object-side surface of the first lens element, and R2 is a radius of curvature of an image-side surface of the first lens element.
3. The ultra-wide angle lens according to claim 1, wherein the ultra-wide angle lens satisfies the following conditional expression:
120 degrees < FOV <170 degrees;
wherein the FOV is the field angle of the ultra-wide angle lens.
4. The ultra-wide angle lens of claim 1, further comprising an aperture disposed between the second lens and the third lens.
5. The ultra-wide angle lens of claim 1, wherein at least one of the surfaces of the first lens element to the sixth lens element is aspheric.
6. The ultra-wide angle lens of claim 1, wherein the first to sixth lenses are glass lenses or plastic lenses.
7. The ultra-wide angle lens of claim 1, further comprising an infrared filter disposed between the sixth lens element and an imaging surface.
8. A camera module, comprising:
the ultra-wide angle lens of any one of claims 1-7; and
and the photosensitive element is arranged on the image side of the ultra-wide-angle lens.
9. An electronic device, comprising:
a housing; and
the camera module of claim 8, mounted on the housing.
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| CN201811409074.5A CN111221096B (en) | 2018-11-23 | 2018-11-23 | Ultra-wide-angle lens, camera module and electronic device |
| KR1020190149963A KR102362592B1 (en) | 2018-11-23 | 2019-11-20 | Uirta wide angle lens unit, camera module and electronics |
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| CN111929842B (en) * | 2020-09-21 | 2020-12-22 | 瑞泰光学(常州)有限公司 | Image pickup optical lens |
| CN112130299A (en) * | 2020-10-19 | 2020-12-25 | 魏海虎 | Ultra-wide angle imaging optical system |
| CN112748545B (en) * | 2021-02-01 | 2022-05-06 | 浙江舜宇光学有限公司 | Optical imaging lens |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001337271A (en) * | 2000-03-21 | 2001-12-07 | Fuji Photo Optical Co Ltd | Lens for reading image and image reader |
| CN103676097A (en) * | 2012-08-30 | 2014-03-26 | 大立光电股份有限公司 | imaging lens |
| CN104035184A (en) * | 2013-03-05 | 2014-09-10 | 大立光电股份有限公司 | imaging lens |
| JP2016206223A (en) * | 2015-04-15 | 2016-12-08 | コニカミノルタ株式会社 | Image capturing lens, lens unit, image capturing device, digital still camera, and mobile terminal |
| CN106950679A (en) * | 2016-01-07 | 2017-07-14 | 富士胶片株式会社 | Imaging len and camera device |
| JP6194134B1 (en) * | 2017-05-11 | 2017-09-06 | エーエーシーアコースティックテクノロジーズ（シンセン）カンパニーリミテッドＡＡＣ Ａｃｏｕｓｔｉｃ Ｔｅｃｈｎｏｌｏｇｉｅｓ（Ｓｈｅｎｚｈｅｎ）Ｃｏ．，Ｌｔｄ | Imaging lens |
| CN107462979A (en) * | 2016-06-04 | 2017-12-12 | 大立光电股份有限公司 | Image capturing optical lens assembly, image capturing device and electronic device |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5289692B2 (en) * | 2005-09-13 | 2013-09-11 | オリンパス株式会社 | Imaging optical system and electronic imaging apparatus having the same |
| JP4552872B2 (en) * | 2006-02-28 | 2010-09-29 | カシオ計算機株式会社 | Zoom lens and camera |
| JP4497106B2 (en) * | 2006-02-28 | 2010-07-07 | カシオ計算機株式会社 | Zoom lens and camera |
| JP5320224B2 (en) * | 2009-09-03 | 2013-10-23 | 富士フイルム株式会社 | Projection variable focus lens and projection display device |
| JP6422224B2 (en) * | 2014-03-17 | 2018-11-14 | キヤノン株式会社 | Compound eye optical equipment |
| JP2016212134A (en) * | 2015-04-30 | 2016-12-15 | 富士フイルム株式会社 | Imaging lens and imaging device |
| CN205003346U (en) * | 2015-10-14 | 2016-01-27 | 浙江舜宇光学有限公司 | Ultra wide -angle lens |
| KR101850962B1 (en) * | 2016-03-22 | 2018-04-20 | 주식회사 에이스솔루텍 | Lens optical system and Imaging Device |
| CN106646835B (en) * | 2016-08-08 | 2018-12-04 | 浙江舜宇光学有限公司 | Wide-angle lens |
| CN108614346B (en) * | 2016-12-13 | 2020-03-20 | 新巨科技股份有限公司 | Six-piece wide-angle lens group |
| CN108873245B (en) * | 2017-05-09 | 2021-04-20 | 信泰光学(深圳)有限公司 | Wide-angle lens |
| JP6178944B1 (en) * | 2017-05-12 | 2017-08-09 | エーエーシーアコースティックテクノロジーズ（シンセン）カンパニーリミテッドＡＡＣ Ａｃｏｕｓｔｉｃ Ｔｅｃｈｎｏｌｏｇｉｅｓ（Ｓｈｅｎｚｈｅｎ）Ｃｏ．，Ｌｔｄ | Imaging lens |
| JP6197141B1 (en) * | 2017-06-26 | 2017-09-13 | エーエーシーアコースティックテクノロジーズ（シンセン）カンパニーリミテッドＡＡＣ Ａｃｏｕｓｔｉｃ Ｔｅｃｈｎｏｌｏｇｉｅｓ（Ｓｈｅｎｚｈｅｎ）Ｃｏ．，Ｌｔｄ | Imaging lens |
-
2018
- 2018-11-23 CN CN201811409074.5A patent/CN111221096B/en active Active
-
2019
- 2019-11-20 KR KR1020190149963A patent/KR102362592B1/en active IP Right Grant
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001337271A (en) * | 2000-03-21 | 2001-12-07 | Fuji Photo Optical Co Ltd | Lens for reading image and image reader |
| CN103676097A (en) * | 2012-08-30 | 2014-03-26 | 大立光电股份有限公司 | imaging lens |
| CN104035184A (en) * | 2013-03-05 | 2014-09-10 | 大立光电股份有限公司 | imaging lens |
| JP2016206223A (en) * | 2015-04-15 | 2016-12-08 | コニカミノルタ株式会社 | Image capturing lens, lens unit, image capturing device, digital still camera, and mobile terminal |
| CN106950679A (en) * | 2016-01-07 | 2017-07-14 | 富士胶片株式会社 | Imaging len and camera device |
| CN107462979A (en) * | 2016-06-04 | 2017-12-12 | 大立光电股份有限公司 | Image capturing optical lens assembly, image capturing device and electronic device |
| JP6194134B1 (en) * | 2017-05-11 | 2017-09-06 | エーエーシーアコースティックテクノロジーズ（シンセン）カンパニーリミテッドＡＡＣ Ａｃｏｕｓｔｉｃ Ｔｅｃｈｎｏｌｏｇｉｅｓ（Ｓｈｅｎｚｈｅｎ）Ｃｏ．，Ｌｔｄ | Imaging lens |
Non-Patent Citations (2)
| Title |
|---|
| 1000万像素全景监控镜头的光学设计;王波;《光学仪器》;20161015;第38卷(第05期);434-440 * |
| 广角大相对孔径f-θ透镜光学设计;苏阳等;《应用光学》;20150515;第36卷(第03期);376-380 * |
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| KR20200062041A (en) | 2020-06-03 |
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