CN203870319U - High image quality wide angle optical lens - Google Patents
High image quality wide angle optical lens Download PDFInfo
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- CN203870319U CN203870319U CN201420253336.4U CN201420253336U CN203870319U CN 203870319 U CN203870319 U CN 203870319U CN 201420253336 U CN201420253336 U CN 201420253336U CN 203870319 U CN203870319 U CN 203870319U
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- lens
- focal length
- aspheric surface
- hyperbolic curve
- lens5
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Abstract
The utility model relates to a high image quality wide angle optical lens comprising a lens barrel. The front end of the lens barrel is provided with a diaphragm. The diaphragm in the cavity of the lens barrel is, from outside to inside, sequentially provided with a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens is a positive focal length lens, and a first object plane facing the object is a hyperbolic curve-type aspheric surface, and a first image plane facing the image is a circular aspheric surface. The second lens is a negative focal length lens having two surfaces, which are respectively in the shape of a meniscus, and are hyperbolic curve-type aspheric surfaces. The third lens is a positive focal length lens, and a second object plane facing the object is a hyperbolic curve-type aspheric surface, and a second image plane facing the image is an oblate aspheric surface. The fourth lens is a positive focal length lens, and the two surfaces are hyperbolic curve-type aspheric surfaces. The fifth lens is a negative focal length lens, and the two surfaces are hyperbolic curve-type aspheric surfaces. The sixth lens is a positive focal length lens, and the two surfaces are hyperbolic curve-type aspheric surfaces capable of improving field curvature aberration.
Description
[technical field]
The utility model relates to a kind of optical lens, relates in particular to a kind of high picture element wide-angle optical lens that is applied to high-pixel mobile phone, ultra-thin high picture element camera.
[background technology]
The such shortcoming of mobile phone digital camera lens ubiquity using at present: plastic cement lens structure, pixel improves difficulty, imaging picture taxes and profits degree is low.On market, the camera cell phone of main flow is mainly the plastic cement structure camera lens below 1,300 ten thousand pixels now, no matter captured image picture element is that the overall aspect such as sharpness or the homogeneity of illumination is all not ideal enough, can only appreciate as standby picture or generally, and be far from enough to print exquisite photo, compare with slr camera, after amplifying, image planes mass discrepancy is obvious.
The utility model, in order to overcome above shortcoming, has carried out a large amount of improvement.
[utility model content]
The utility model has overcome the deficiencies in the prior art, provides a kind of 1,600 ten thousand-3,000 ten thousand pixels, ultra-thin, volume is little, can be used for the high-pixel optical lens of digital camera and mobile phone.
In order to solve the technical matters of above-mentioned existence, the utility model has adopted following technical proposal:
A kind of high picture element wide-angle optical lens, it is characterized in that comprising lens barrel 1, lens barrel front end is provided with diaphragm 2, in the cavity of lens barrel 1, is provided with successively from outside to inside first lens 3, the second lens 4, the 3rd lens 5, the 4th lens 6, the 5th lens 7, the 6th lens 8 after diaphragm; Described first lens 3 is positive focal length lens, and its first object plane 31 towards object plane is hyperbolic-type aspheric surface, is circular aspheric surface towards the first image planes 32 of image planes.Two surfaces of the second lens 4 are the negative focal length lens of meniscus shape, and two surface is hyperbolic curve aspheric surface; The 3rd lens 5 are positive focal length lens, and its second object plane 51 towards object plane is hyperbolic curve aspheric surface, is oblate type aspheric surface towards the second image planes 52 of image planes; The 4th lens 6 are positive focal length lens, and two surface is hyperbolic curve aspheric surface; The 5th lens 7 are negative focal length lens, and two surface is hyperbolic curve aspheric surface; The 6th lens 8 are positive focal length lens, and two surface is the hyperbolic curve aspheric surface of improving well curvature of field aberration.
The high picture element wide-angle optical lens of one as above, it is characterized in that described six pieces of lens meet following condition,-2.5<f1/f2<2.5,0<f3/f4<3 ,-3.5<f5/f6<3.5; Wherein, f1-f6 be followed successively by first, second, third and fourth, the focal length of five, six lens.
The high picture element wide-angle optical lens of one as above, it is characterized in that between lens, needing to meet in this optical texture: vd lens2≤31, vd lens5≤31, vd (lens1, lens3, lens4, lens6) >31, (vd lnes1-vd lens2) >10, (vd lens3-vd lens2) >10, (vd lens4-vd lens2) >15, (vd lens6-vd lens2) >15, (vd lens1-vd lens5) >10, (vd lens3-vd lens5) >20, (vd lens4-vd lens5) >10, (vd lens6-vd lens5) >25, wherein, vd lens1 is the abbe number of first lens, vd lens2 is the abbe number of the second lens, vd lens3 is the abbe number of the 3rd lens, vd lens4 is the abbe number of the 4th lens, vd lens5 is the abbe number of the 5th lens, vd lens6 is the abbe number of the 6th lens.
The high picture element wide-angle optical lens of one as above, is characterized in that the corresponding spacer ring 9 that is provided with between described each adjacent lens.
The high picture element wide-angle optical lens of one as above, is characterized in that described first lens and the 4th lens all adopt the glass aspheric lenses of high index of refraction.
The utility model compared with prior art has advantages of as follows:
1, more than camera lens can reach 2,000 ten thousand pixels, and existing miniature digital-mirror is lower than 1,300 ten thousand pixels as first.
2, overall even, the high brightness (f-number reaches F1.8) of illumination image planes of the present utility model, and the most centers of existing miniature numerical digit camera lens are bright, surrounding is dark.
3, the utility model can be realized the maximum wide-angle imaging to 100 degree.
4, the utility model can be for the CMOS sensitive film of 2000-3000 ten thousand pixels.
5, more crucial is to add plastic aspherical element structure because native system has adopted glass aspheric surface, therefore the Geometrical MTF of optical system is greatly improved, can make taxes and profits degree, transmitance, the color reducibility of this product be significantly improved.
[brief description of the drawings]
Fig. 1 is diagrammatic cross-section of the present utility model.
Fig. 2 is decomposing schematic representation of the present utility model.
[embodiment]
Below in conjunction with accompanying drawing, the utility model is described in detail:
As shown in Figure 1, 2, a kind of high picture element wide-angle optical lens, can, for relatively cheap high pixel CMOS sensitive film 11, comprise lens barrel 1, and lens barrel front end is provided with mechanical aperture and forms diaphragm 2.In the cavity of lens barrel, after mechanical aperture, be provided with successively first lens 3, the second lens 4, the 3rd lens 5, the 4th lens 6, the 5th lens 7, the 6th lens 8.The corresponding spacer ring 9 that is provided with between described each adjacent lens.Described first lens 3 is positive focal length lens, and its first object plane 31 towards object plane is hyperbolic-type aspheric surface, is circular aspheric surface towards the first image planes 32 of image planes.Two surfaces of the second lens 4 are the negative focal length lens of meniscus shape, and two surface is hyperbolic curve aspheric surface.For reducing the change in refraction angle of light between each lens, be controlled to image distortion, in structure, need to reduce the distance between first lens 4 and the second lens 5 as far as possible.Described the 3rd lens 5 are positive focal length lens, and its second object plane 51 towards object plane is hyperbolic curve aspheric surface, is oblate type aspheric surface towards the second image planes 52 of image planes.The 4th lens 6 are positive focal length lens, and two surface is hyperbolic curve aspheric surface.The 5th lens 7 are negative focal length lens, and two surface is hyperbolic curve aspheric surface.The 6th lens 8 are positive focal length lens, and two surface is hyperbolic curve aspheric surface, and the 6th lens adopt hyperbolic curve aspheric surface, improve well curvature of field aberration.
Described first lens 3, the second lens 4, the 3rd lens 5, the 4th lens 6, the 5th lens 7, the system element characteristic of the 6th lens 8 meets following formula :-2.5<f1/f2<2.5, 0<f3/f4<3,-3.5<f5/f6<3.5, vd lens2≤31, vd lens5≤31, vd (lens1, lens3, lens4, lens6) >31, vd lnes1-vd lens2>10, vd lens3-vd lens2>10, vd lens4-vd lens2>15, vd lens6-vd lens2>15, vd lens1-vd lens5>10, vd lens3-vd lens5>20, vd lens4-vd lens5>10, vd lens6-vd lens5>25.Wherein, f1-f6 be followed successively by first, second, third and fourth, the focal length of five, six lens; Vd lens1 is the abbe number of first lens, vd lens2 is the abbe number of the second lens, and vd lens3 is the abbe number of the 3rd lens, and vd lens4 is the abbe number of the 4th lens, vd lens5 is the abbe number of the 5th lens, and vd lens6 is the abbe number of the 6th lens.
In this optical texture, focal length about eyeglass first lens and the second lens meets formula-2.5<f1/f2<2.5,0<f3/f4<3, when-3.5<f5/f6<3.5, can solve focal length assignment problem and the tolerance balance of distribution problem of the utility model structure, can effectively realize system length ultra-thin and reduce structural tolerance tender subject.
The 6th described lens 8 are also provided with optical filter 10 towards that side of image space; light enters from optical filter 10; optical filter has certain protective effect to CMOS sensitive chip 11; also filter a part of light simultaneously and reduce veiling glare and hot spot etc., make image color beautiful and there is good color reducibility sharp keen time.
Aperture diaphragm 2 faces are positioned at optical system first lens front, and it can make the little emergence angle that simultaneously reduces optical system of eyeglass clear aperture of system, thereby make the volume miniaturization of optical system.
Described first lens and the 4th lens adopt the glass aspheric surface of high index of refraction (refractive index is greater than more than 1.8), and owing to having strengthened the refraction of light, it can make the length of whole camera lens be as short as below 4.9mm most.
Aspheric surface configurations described first, second, third, fourth, the 5th and the 6th lens meet following equation: Z=cy
2/ { 1+ √ [1-(1+k) c
2y
2]+α
1y
2+ α
2y
4+ α
3y
6+ α
4y
8+ α
5y
10+ α
6y
12+ α
7y
14+ α
8y
16; In formula, parameter c is the corresponding curvature of radius, and y is radial coordinate (its unit is identical with length of lens unit), and k is circular cone whose conic coefficient; In the time that k-factor is less than-1, the face shape curve of lens is hyperbolic curve, and in the time that k-factor equals-1, the face shape curve of lens is para-curve; In the time that k-factor is between-1 to 0, the face shape curve of lens is oval, and in the time that k-factor equals 0, the face shape curve of lens is circular, and in the time that k-factor is greater than 0, the face shape curve of lens is oblate; α
1to α
8represent respectively the corresponding coefficient of each radial coordinate.
Below the design example of the technical program:
Surface data gathers:
Surface data details:
Surface OBJ: standard
Surface STO: standard
Surface 2: aspheric surface
Surface 3: aspheric surface
Surface 4: aspheric surface
Surface 4: aspheric surface
Surface 6: aspheric surface
Surface 7: aspheric surface
Surface 8: aspheric surface
Surface 9: aspheric surface
Surface 10: aspheric surface
Surface 11: aspheric surface
Surface 12: aspheric surface
Surface 14: STANDARD
Surface 15: STANDARD
Surface 16: STANDARD
Surface IMA: STANDARD
The data of refractive index:
System temperature: Celsius 25.0000
System pressure: atmospheric pressure 1.0000
Absolute air index: 1.000269 wavelength 0.546000 μ m
Index data is to carry out under the system temperature of specifying and pressure.
Measuring wavelength is to carry out at system temperature and pressure at the air of specifying.
Thermal expansivity data:
Claims (5)
1. one kind high picture element wide-angle optical lens, it is characterized in that comprising lens barrel (1), lens barrel front end is provided with diaphragm (2), in the cavity of lens barrel (1), after diaphragm, be provided with successively from outside to inside first lens (3), the second lens (4), the 3rd lens (5), the 4th lens (6), the 5th lens (7), the 6th lens (8); Described first lens (3) is positive focal length lens, and its first object plane (31) towards object plane is hyperbolic-type aspheric surface, is circular aspheric surface towards first image planes (32) of image planes.Two surfaces of the second lens (4) are the negative focal length lens of meniscus shape, and two surface is hyperbolic curve aspheric surface; The 3rd lens (5) are positive focal length lens, and its second object plane (51) towards object plane is hyperbolic curve aspheric surface, is oblate type aspheric surface towards second image planes (52) of image planes; The 4th lens (6) are positive focal length lens, and two surface is hyperbolic curve aspheric surface; The 5th lens (7) are negative focal length lens, and two surface is hyperbolic curve aspheric surface; The 6th lens (8) are positive focal length lens, and two surface is the hyperbolic curve aspheric surface of improving well curvature of field aberration.
2. the high picture element wide-angle optical lens of one according to claim 1, it is characterized in that described six pieces of lens meet following condition,-2.5<f1/f2<2.5,0<f3/f4<3 ,-3.5<f5/f6<3.5; Wherein, f1-f6 be followed successively by first, second, third and fourth, the focal length of five, six lens.
3. the high picture element wide-angle optical lens of one according to claim 1 and 2, it is characterized in that between lens, needing to meet in this optical texture: vd lens2≤31, vd lens5≤31, vd (lens1, lens3, lens4, lens6) >31, (vd lnes1-vd lens2) >10, (vd lens3-vd lens2) >10, (vd lens4-vd lens2) >15, (vd lens6-vd lens2) >15, (vd lens1-vd lens5) >10, (vd lens3-vd lens5) >20, (vd lens4-vd lens5) >10, (vd lens6-vd lens5) >25, wherein, vd lens1 is the abbe number of first lens, vd lens2 is the abbe number of the second lens, vd lens3 is the abbe number of the 3rd lens, vd lens4 is the abbe number of the 4th lens, vd lens5 is the abbe number of the 5th lens, vd lens6 is the abbe number of the 6th lens.
4. according to the high picture element wide-angle optical lens of one described in claim 1 or 2 or 3, it is characterized in that the corresponding spacer ring (9) that is provided with between described each adjacent lens.
5. according to the high picture element wide-angle optical lens of one described in claim 1 or 2 or 3, it is characterized in that described first lens and the 4th lens all adopt the glass aspheric lenses of high index of refraction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420253336.4U CN203870319U (en) | 2014-05-16 | 2014-05-16 | High image quality wide angle optical lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420253336.4U CN203870319U (en) | 2014-05-16 | 2014-05-16 | High image quality wide angle optical lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203870319U true CN203870319U (en) | 2014-10-08 |
Family
ID=51651256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420253336.4U Expired - Lifetime CN203870319U (en) | 2014-05-16 | 2014-05-16 | High image quality wide angle optical lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203870319U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10353176B2 (en) | 2016-05-20 | 2019-07-16 | Largan Precision Co., Ltd. | Image capturing lens assembly, imaging apparatus and electronic device |
-
2014
- 2014-05-16 CN CN201420253336.4U patent/CN203870319U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10353176B2 (en) | 2016-05-20 | 2019-07-16 | Largan Precision Co., Ltd. | Image capturing lens assembly, imaging apparatus and electronic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHONGSHAN LIANHE PHOTOELECTRIC TECHNOLOGY CO., LTD Free format text: FORMER NAME: ZHONGSHAN UNION OPTIC CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 528400 Zhongshan Torch Development Zone, Guangdong Road, No. 10 Patentee after: UNION OPTECH Co.,Ltd. Address before: 528400 Zhongshan Torch Development Zone, Guangdong Road, No. 10 Patentee before: UNION OPTECH Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20141008 |
|
| CX01 | Expiry of patent term |