CN105068218A - Ultra-wide-angle lens - Google Patents
Ultra-wide-angle lens Download PDFInfo
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- CN105068218A CN105068218A CN201510588968.5A CN201510588968A CN105068218A CN 105068218 A CN105068218 A CN 105068218A CN 201510588968 A CN201510588968 A CN 201510588968A CN 105068218 A CN105068218 A CN 105068218A
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Abstract
The invention discloses an ultra-wide-angle lens, which comprises a lens barrel as well as a first lens, a second lens, a third lens, an aperture diaphragm, a fourth lens, a fifth lens and a sixth lens which are arranged in sequence from an object side to an image side in the lens barrel, wherein the focal power of the first lens is negative; the focal power of the second lens is negative; the focal power of the third lens is positive; the aperture diaphragm is arranged between the third lens and the fourth lens; the focal power of the fourth lens is positive; the focal power of the fifth lens is positive; the focal power of the sixth lens is negative; the fifth lens and the sixth lens form a glued lens; and the total track length (TTL) of the ultra-wide-angle lens meets the condition that: 20mm<=TTL<=25mm. the ultra-wide-angle lens increases resolving power of the whole set of lens, gives full consideration to angle of field of view and image quality, ensures that the ultra-wide-angle lens has excellent imaging quality under the condition of large viewing angle, and has the advantages of simple structure, easy processing and low cost.
Description
Technical field
The present invention relates to and the imaging optical system of camera lens, particularly a kind of bugeye lens.
Background technology
Camera lens on digital image product (as video camera, digital camera etc.), can be divided into standard lens, short Jiao (wide-angle) camera lens, focal length (looking in the distance) camera lens three class by the difference of its focal length or visual field.Usual wide-angle lens just refers to short-focus lens, and general focal length is longer, and visual angle is less, and coverage is less; Focal length is shorter, and visual angle is larger, and coverage is also larger.Use wide-angle lens can expand the shooting visual field, within the scope of limited distance, shoot the photo of panorama or large scene.Such as, in video camera, adopt wide-angle lens to be also to the client of carrying out network video all can be taken in Internet video, thus make Internet video Communicator can reach real communication effectiveness.
Existing wide-angle lens all can produce many aberrations, causes image fog out of focus.For overcoming above-mentioned aberration, lens design person must use a lot of sheet lens to compensate in camera lens.In general, camera lens oversize or too short its design all can become difficulty, higher to technological requirement during manufacture, thus cause image quality improve while, camera lens also becomes complex structure and cost is higher.
Summary of the invention
The object of this invention is to provide a kind of bugeye lens, to solve existing bugeye lens complex structure and the higher problem of cost.
According to an aspect of the present invention, provide a kind of bugeye lens, comprise lens barrel and be arranged on the first lens, the second lens, the 3rd lens, aperture diaphragm, the 4th lens, the 5th lens and the 6th lens that are arranged in order along thing side to image side in lens barrel, wherein
First power of lens is negative;
Second power of lens is negative;
3rd power of lens is just;
Aperture diaphragm is located between the 3rd lens and the 4th lens;
4th power of lens is just;
5th power of lens is just;
6th power of lens is negative; 5th lens and the 6th lens form cemented doublet;
The optics overall length TTL of bugeye lens meets: 20mm≤TTL≤25mm.
Adopt the bugeye lens of above technical scheme, use the optical system of six pieces of lens compositions to realize the premium properties of ultra-wide angle, 16M pixel resolution.The mode that this bugeye lens combines owing to have employed separate lenses and cemented doublet, improve the resolving power of whole arrangement of mirrors head, take into full account the property taken into account of field angle and picture element, ensure that this bugeye lens has excellent image quality when with great visual angle, meanwhile, rational focal power is distributed, and makes this bugeye lens structure simple, handling ease, thus reduce cost.
In some embodiments, the focal distance f 56 of cemented doublet meets the following conditions: 11.83mm≤f56≤38.11mm.
In some embodiments, the first lens thing side is convex surface, and image side is concave surface;
Second lens thing side is convex surface, and image side is concave surface;
3rd lens thing side is convex surface, and image side is concave surface;
4th lens are biconvex;
5th lens are biconvex;
6th lens thing side is concave surface, and image side is convex surface.Thus, the processing of this bugeye lens is convenient.
In some embodiments, satisfy the following conditional expression:
(1)-0.61≤f/f1≤-0.38；
(2)-0.56≤f/f2≤-0.32；
(3)0.18≤f/f3≤0.38；
(4)0.60≤f/f4≤0.84；
(5)0.09≤f/f56≤0.29；
Wherein,
F is the focal length of whole system; F1 is the focal length of the first lens;
F2 is the focal length of the second lens; F3 is the focal length of the 3rd lens;
F4 is the focal length of the 4th lens; F56 is the focal length of balsaming lens.Thus, the performance of this bugeye lens is more stable.
In some embodiments, the focal distance f 1 of the first lens, Refractive Index of Material Nd1 and material Abbe constant Vd1 meet the following conditions :-9.03mm≤f1≤-5.62mm; 1.45≤Nd1≤1.55; 60≤Vd1≤80.
In some embodiments, the focal distance f 2 of the second lens, Refractive Index of Material Nd2 and material Abbe constant Vd2 meet the following conditions :-10.72mm≤f2≤-6.13mm; 1.50≤Nd2≤1.57; 35≤Vd2≤50.
In some embodiments, the focal distance f 3 of the 3rd lens, Refractive Index of Material Nd3 and material Abbe constant Vd3 meet the following conditions: 9.03mm≤f3≤19.06mm; 1.77≤Nd3≤1.87; 30≤Vd3≤45.
In some embodiments, the focal distance f 4 of the 4th lens, Refractive Index of Material Nd4 and material Abbe constant Vd4 meet the following conditions: 4.08mm≤f4≤5.72mm; 1.65≤Nd4≤1.75; 48≤Vd4≤60.
In some embodiments, the first lens adopt the manufacture of light crown glass material;
Second lens adopt the manufacture of light flint material;
3rd lens adopt the manufacture of heavy-lanthanide flint glass material;
4th lens adopt the manufacture of lanthanum crown glass material;
5th lens adopt the manufacture of lanthanum crown glass material;
6th lens adopt the manufacture of dense flint glass material.The material of said lens is conventional the processing raw material of optical lens industry, and thus, the cost of this bugeye lens is lower.
Accompanying drawing explanation
Fig. 1 is the structural representation of the bugeye lens of one embodiment of the present invention.
The lens system structure schematic diagram that Fig. 2 is bugeye lens shown in Fig. 1.
Fig. 3 is the optical system diagram of bugeye lens shown in Fig. 1.
The defocusing amount curve map that Fig. 4 is bugeye lens shown in Fig. 1.
The curvature of field that Fig. 5 is bugeye lens shown in Fig. 1, distortion curve figure.
Fig. 6 is for bugeye lens shown in Fig. 1 is at the transfer curve figure of 400lp/mm.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further detailed explanation.
Fig. 1 to Fig. 6 show schematically show the bugeye lens according to one embodiment of the present invention.This bugeye lens f=3.49mm, F/NO=2.6,2 ω=176 °, TTL=23.54mm.
As shown in the figure, this device comprises lens barrel 9 and is arranged on the first lens 1, second lens 2, the 3rd lens 3, aperture diaphragm 7, the 4th lens 4, the 5th lens 5, the 6th lens 6 and the cover glass 8 that are arranged in order along thing side to image side in lens barrel 9.
Wherein, the focal power of the first lens 1 is negative; The thing side 11 of the first lens 1 is convex surface, and image side 12 is concave surface.
The focal power of the second lens 2 is negative; The thing side 21 of the second lens 2 is convex surface, and image side 22 is concave surface.
The focal power of the 3rd lens 3 is just; The thing side 31 of the 3rd lens 3 is convex surface, and image side 32 is concave surface.
The focal power of the 4th lens 4 is just; Thing side 41 and the image side 42 of the 4th lens 4 are biconvex.
Aperture diaphragm 7 is located between the 3rd lens 3 and the 4th lens 4, and near the thing side 41 of the 4th lens 4.
The focal power of the 5th lens 5 is just; Thing side 51 and the image side 52 of the 5th lens 5 are biconvex.
The focal power of the 6th lens 6 is negative; The thing side 61 of the 6th lens 6 is concave surface, and image side 62 is convex surface.
5th lens 5 and the 6th lens 6 form cemented doublet.
Above-mentioned bugeye lens satisfies the following conditional expression:
(1)-0.61≤f/f1≤-0.38；(2)-0.56≤f/f2≤-0.32；
(3)0.18≤f/f3≤0.38；(4)0.60≤f/f4≤0.84；
(5)0.09≤f/f56≤0.29。
Wherein, f is the focal length of whole system; F1 is the focal length of the first lens; F2 is the focal length of the second lens; F3 is the focal length of the 3rd lens; F4 is the focal length of the 4th lens; F56 is the focal length of balsaming lens.
This wide-angle camera detail parameters is as follows:
In other examples, the optics overall length TTL of bugeye lens can also be 20mm or 25mm.
In some other embodiments, the focal length of the first lens 1 can also be-9.03mm or-5.62mm, and Refractive Index of Material can also be 1.45 or 1.55, and material Abbe constant can also be 60 or 80.
The focal length of the second lens 2 can also be-10.72mm or-6.13mm, and Refractive Index of Material can also be 1.50 or 1.57, and material Abbe constant can also be 35 or 50.
The focal length of the 3rd lens 3 can also be 9.03mm or 19.06mm, and Refractive Index of Material can also be 1.77 or 1.87, and material Abbe constant can also be 30 or 45.
The focal length of the 4th lens 4 can also be 4.08mm or 5.72mm, and Refractive Index of Material can also be 1.65 or 1.75, and material Abbe constant can also be 48 or 60.
Adopt the bugeye lens of above technical scheme, use the optical system of six pieces of lens compositions to realize the premium properties of ultra-wide angle, 16M pixel resolution.This bugeye lens high-pixel wide-angle camera of the present invention, owing to have employed the mode that separate lenses and cemented doublet combine, improve the resolving power of whole arrangement of mirrors head, take into full account the property taken into account of field angle and picture element, ensure that this bugeye lens has excellent image quality when with great visual angle, simultaneously, rational focal power is distributed, make this bugeye lens structure simple, handling ease, thus reduce cost.
Above-described is only some embodiments of the present invention.For the person of ordinary skill of the art, without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (9)
1. bugeye lens, is characterized in that, comprises lens barrel and is arranged on the first lens, the second lens, the 3rd lens, aperture diaphragm, the 4th lens, the 5th lens and the 6th lens that are arranged in order along thing side to image side in lens barrel, wherein,
Described first power of lens is negative;
Described second power of lens is negative;
Described 3rd power of lens is just;
Described aperture diaphragm is located between described 3rd lens and the 4th lens;
Described 4th power of lens is just;
Described 5th power of lens is just;
Described 6th power of lens is negative; Described 5th lens and described 6th lens form cemented doublet;
The optics overall length TTL of described bugeye lens meets: 20mm≤TTL≤25mm.
2. bugeye lens according to claim 1, is characterized in that, the focal distance f 56 of described cemented doublet meets the following conditions: 11.83mm≤f56≤38.11mm.
3. bugeye lens according to claim 1, is characterized in that,
Described first lens thing side is convex surface, and image side is concave surface;
Described second lens thing side is convex surface, and image side is concave surface;
Described 3rd lens thing side is convex surface, and image side is concave surface;
Described 4th lens are biconvex;
Described 5th lens are biconvex;
Described 6th lens thing side is concave surface, and image side is convex surface.
4. the bugeye lens according to claim 1 or 2 or 3, is characterized in that,
Satisfy the following conditional expression:
(1)-0.61≤f/f1≤-0.38；
(2)-0.56≤f/f2≤-0.32；
(3)0.18≤f/f3≤0.38；
(4)0.60≤f/f4≤0.84；
(5)0.09≤f/f56≤0.29；
Wherein,
F is the focal length of whole system; F1 is the focal length of the first lens;
F2 is the focal length of the second lens; F3 is the focal length of the 3rd lens;
F4 is the focal length of the 4th lens; F56 is the focal length of balsaming lens.
5. bugeye lens according to claim 1, is characterized in that, focal distance f 1, the Refractive Index of Material Nd1 and material Abbe constant Vd1 of described first lens meet the following conditions :-9.03mm≤f1≤-5.62mm; 1.45≤Nd1≤1.55; 60≤Vd1≤80.
6. bugeye lens according to claim 1, is characterized in that, focal distance f 2, the Refractive Index of Material Nd2 and material Abbe constant Vd2 of described second lens meet the following conditions :-10.72mm≤f2≤-6.13mm; 1.50≤Nd2≤1.57; 35≤Vd2≤50.
7. bugeye lens according to claim 1, is characterized in that, focal distance f 3, the Refractive Index of Material Nd3 and material Abbe constant Vd3 of described 3rd lens meet the following conditions: 9.03mm≤f3≤19.06mm; 1.77≤Nd3≤1.87; 30≤Vd3≤45.
8. bugeye lens according to claim 1, is characterized in that, focal distance f 4, the Refractive Index of Material Nd4 and material Abbe constant Vd4 of described 4th lens meet the following conditions: 4.08mm≤f4≤5.72mm; 1.65≤Nd4≤1.75; 48≤Vd4≤60.
9. bugeye lens according to claim 1, is characterized in that,
Described first lens adopt the manufacture of light crown glass material;
Described second lens adopt the manufacture of light flint material;
Described 3rd lens adopt the manufacture of heavy-lanthanide flint glass material;
Described 4th lens adopt the manufacture of lanthanum crown glass material;
Described 5th lens adopt the manufacture of lanthanum crown glass material;
Described 6th lens adopt the manufacture of dense flint glass material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510588968.5A CN105068218B (en) | 2015-09-15 | 2015-09-15 | Bugeye lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510588968.5A CN105068218B (en) | 2015-09-15 | 2015-09-15 | Bugeye lens |
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| CN105068218A true CN105068218A (en) | 2015-11-18 |
| CN105068218B CN105068218B (en) | 2018-06-26 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108427184A (en) * | 2018-05-05 | 2018-08-21 | 广东弘景光电科技股份有限公司 | The big target surface Depth Imaging optical system of co carbonization and its camera module of application |
| CN110488471A (en) * | 2018-05-14 | 2019-11-22 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN110632745A (en) * | 2018-06-22 | 2019-12-31 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN112698474A (en) * | 2019-10-23 | 2021-04-23 | 深圳长城开发科技股份有限公司 | Ultra-wide angle lens |
| WO2021142784A1 (en) * | 2020-01-17 | 2021-07-22 | 天津欧菲光电有限公司 | Optical system, lens module, and electronic device |
| CN114609762A (en) * | 2022-03-19 | 2022-06-10 | 广东弘景光电科技股份有限公司 | Small-size large-wide-angle optical system and camera module applying same |
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| CN203519916U (en) * | 2013-10-29 | 2014-04-02 | 姚学文 | Ultra wide angle lens |
| CN204925498U (en) * | 2015-09-15 | 2015-12-30 | 中山市弘景光电科技有限公司 | Super wide angle lens |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108427184A (en) * | 2018-05-05 | 2018-08-21 | 广东弘景光电科技股份有限公司 | The big target surface Depth Imaging optical system of co carbonization and its camera module of application |
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| CN110488471B (en) * | 2018-05-14 | 2021-10-22 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN110632745A (en) * | 2018-06-22 | 2019-12-31 | 宁波舜宇车载光学技术有限公司 | Optical lens |
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| CN112698474A (en) * | 2019-10-23 | 2021-04-23 | 深圳长城开发科技股份有限公司 | Ultra-wide angle lens |
| WO2021142784A1 (en) * | 2020-01-17 | 2021-07-22 | 天津欧菲光电有限公司 | Optical system, lens module, and electronic device |
| CN114609762A (en) * | 2022-03-19 | 2022-06-10 | 广东弘景光电科技股份有限公司 | Small-size large-wide-angle optical system and camera module applying same |
| CN114609762B (en) * | 2022-03-19 | 2024-05-03 | 广东弘景光电科技股份有限公司 | Small-volume large-wide-angle optical system and camera module applying same |
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| CN105068218B (en) | 2018-06-26 |
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Address after: 528400 Zhongshan Province, the Torch Development Zone, Guangdong venture Road, No. twentieth, building fifth, floor 18 Applicant after: Guangdong Hongjing Optoelectronics Technology Co., Ltd. Address before: 528400 Zhongshan Province, the Torch Development Zone, Guangdong venture Road, No. twentieth, building fifth, floor 18 Applicant before: ZHONGSHAN HONGJING OPTICAL TECHNOLOGY Co.,Ltd. |
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