CN102928964A - Optical lens - Google Patents
Optical lens Download PDFInfo
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- CN102928964A CN102928964A CN2012104027146A CN201210402714A CN102928964A CN 102928964 A CN102928964 A CN 102928964A CN 2012104027146 A CN2012104027146 A CN 2012104027146A CN 201210402714 A CN201210402714 A CN 201210402714A CN 102928964 A CN102928964 A CN 102928964A
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- aspheric surface
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Abstract
The invention relates to an optical lens, aims to overcome the defects in the prior art, and provides a high-image quality micro aspheric optical lens which is high in pixel and small in size, can be used for a digital camera and a mobile phone, and has a mixed lens structure. The lens comprises a lens cone, a bearing and a diaphragm; a first lens, a second lens, a third lens and a fourth lens are sequentially arranged in the lens cone from inside to outside; the first lens is a biconvex aspheric lens; the second lens has a section which is a falcate spherical surface; the third lens has a section which is a hyperbolic aspheric surface; and the fourth lens has a section which is a hyperbolic aspheric surface. The optical lens is mainly applied to camera cell phones.
Description
[technical field]
The present invention relates to a kind of optical lens, relate in particular to a kind of high image quality miniature aspherics camera lens of hybrid lens structure of the minisize optical lens that is applied to high-pixel mobile phone, high picture element camera.
[background technology]
Camera, the such shortcoming of mobile phone digital camera lens ubiquity used at present: pixel is lower, physical dimension is larger.The camera cell phone of present main flow mainly is the low configuration camera lens of 100,000,300,000 pixels on the market, no matter captured image picture element is that sharpness or the aspects such as homogeneity of illumination of integral body is all not ideal enough, can only as standby picture or general appreciation, can not satisfy to print exquisite photo far away.
And camera cell phone is bigger than normal with the profile of digital camera lens, external diameter is generally greater than 8mm, and be used for high pixel chip and be confined to adopt the CCD sensitive film, and CCD sensitization technology is controlled in the Japanese manufacturer hand, comparatively leading product is obtained very difficult, the camera lens that is used for simultaneously the CCD sensitive film is long, and the optical system overall length is greater than 8mm, uses to seem on the built-in camera cell phone that volume is larger.
For solving above-mentioned existing problem, the present invention makes useful improvement.
[summary of the invention]
The present invention has overcome the deficiencies in the prior art, provides a kind of high pixel, volume little, can be used in the high image quality miniature aspherics camera lens of the hybrid lens structure of digital camera and mobile phone.
In order to solve the technical matters of above-mentioned existence, the present invention adopts following technical proposal:
A kind of optical lens comprises lens barrel and bearing and diaphragm, is respectively equipped with from outside to inside first lens, the second lens, the 3rd lens in lens barrel, the 4th lens; It is characterized in that: described first lens is the non-spherical lens of biconvex, and the cross section of described the second lens is the falcate sphere, and the cross section of described the 3rd lens is the aspheric surface of hyperbola, and the cross section of described the 4th lens is the aspheric surface of hyperbolic shape;
Aforesaid a kind of optical lens is characterized in that: the light-shielding sheet that is respectively equipped with the veiling glare eliminated of annular on the surface of contact of described first lens, the second lens, the 3rd lens, the 4th lens adjacent lens;
Aforesaid a kind of optical lens is characterized in that: the first surface of described first lens is oval aspherical shape, and second is oblate ellipsoid;
Aforesaid a kind of optical lens is characterized in that: the aspheric surface configuration of first lens, the 3rd lens, the 4th lens satisfies 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
Aforesaid a kind of optical lens is characterized in that: the system element characteristic of first lens, the second lens, the 3rd lens satisfies following formula :-0.4＜f1/f234＜0, vd234P-vd234N〉30mm;
Aforesaid a kind of optical lens is characterized in that: be provided with below the 3rd lens and between the surface of contact of the 4th lens for the spacer ring that guarantees the distance between the lens;
Aforesaid a kind of optical lens is characterized in that: in the cavity of described lens barrel and bearing, the rear portion of the 4th lens also is provided with optical filter, and this optical filter is fixed on the bearing.
The present invention compared with prior art has following advantage:
1, numerical digit camera lens of the present invention can reach more than 3,000,000 pixels, and existing miniature digital-mirror is 100,000,300,000 pixels as first;
2, illumination image planes of the present invention are whole evenly, bright, and the most centers of existing miniature numerical digit camera lens are bright, dark all around;
3, sharpness of the present invention is high, color is clearly demarcated, and color reducibility is good;
4, the present invention can be used for the CMOS sensitive film of 3,000,000 pixels;
5, the present invention has solved also that former glass is moulded the glass mirror processing difficulties in the mixed structure and the problem that yields is low and cost is relatively high that causes.
[description of drawings]
Fig. 1 is front elevation of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is stereographic map of the present invention.
[embodiment]
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
A kind of optical lens comprises lens barrel 1 and bearing 2, and the front end of lens barrel 1 is provided with diaphragm 3, and diaphragm 3 is positioned at the foremost of optical system, and it can be so that the eyeglass clear aperture of system be minimum, thus so that the volume miniaturization of optical system.After diaphragm 3, in the cavity of lens barrel 1, be provided with successively first lens 4, the second lens 5, the 3rd lens 6, the four lens 7.Described first lens 4 is the non-spherical lens of biconvex, and the upper surface of this first lens 4 is oval aspherical shape, and lower surface is oblate ellipsoid.The surface of the second lens 5 is the falcate spherical shape, and it has high refractivity, designs to such an extent that more just become possibility owing to this position in optical system and high index of refraction make its external diameter.
Here be different from the general structure glass spherical lens is placed on the optical system foremost, because consider the conflicting problem of technique of glass mirror processing and assembling, thereby the present invention is by the reasonable distribution of front and back aspheric surface aberration and the technological problems that has solved the front with the ingenious equilibrium of glass lens aberration; The upper surface of the 3rd lens 6 is the aspheric surface of hyperbola, lower surface is necessary for the aspheric surface of hyperbola, it can be effectively so that the curvature of field reduce, the surface of the 4th lens 7 is the aspheric surface of hyperbolic shape, and these third and fourth lens 6,7 cooperation efficiently solve the problem of various aberration equilibriums.
For reducing the change in refraction angle of light between each lens, be controlled to image distortion, need to reduce the distance between first lens 4 and the second lens 5 on the structure as far as possible; Distance between the second lens 5 and the 3rd lens 6 then need increase as far as possible simultaneously; For improving curvature of field aberration, the two-sided hyperbolic curve aspheric surface that is designed to of the 3rd lens 6.Be respectively equipped with the light-shielding sheet 8 of the veiling glare eliminated of annular on the surface of contact of described first lens 4, the second lens 5, the 3rd lens 6, lens that the 4th lens 7 are adjacent, lower into to greatest extent distortion of informed image.Be provided with between the surface of contact of the light-shielding sheet 8 below the 3rd lens 6 and the 4th lens 7 for the spacer ring 10 that guarantees the distance between the lens.
In the cavity of described lens barrel 1 and bearing 2; the rear portion of the 4th lens 7 also is provided with optical filter 9; this optical filter 9 is fixed on bearing and goes up; the below of optical filter 9 is exactly the CMOS sensitive chip; light enters from optical filter 9; 9 pairs of CMOS sensitive chips of optical filter have certain protective effect; also filter simultaneously a part of light; has good color reducibility when making image color beautiful and sharp keen; this optical filter 9 has also guaranteed the carrying out smoothly of packaging technology of back except the problem that solves the color aspect.
The aspheric surface configuration of first lens 4, the 3rd lens 6, the 4th lens 7 satisfies following equation: Z=cy
2/ { 1+ √ ［ 1-1+kc
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
16In 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 the circular cone whose conic coefficient.When k-factor face shape curve less than-1 time is hyperbolic curve, equaling at-1 o'clock is para-curve, is oval in the time of between-1 to 0, equals at 0 o'clock for circular, be oblateness greater than 0 o'clock.α
1To α
8Represent respectively the corresponding coefficient of each radial coordinate, can accurately set the geomery of lens front and back both-sided aspherical by above parameter.In the present invention, first lens 4 first surfaces are oval aspherical shape, require k-factor between-1 ∽ 0, and second aspherical shape is oblate ellipsoid, and the scope of its coefficient k should be greater than 1; The first surface aspheric surface of the 3rd lens 6 and second aspherical shape all are hyperbola, and its k-factor is all less than-1; The first surface aspheric surface of the 4th lens 7 and second aspherical shape all are hyperbola, and its k-factor is all less than-1.
The system element characteristic of first lens 4, the second lens 5, the 3rd lens 6 satisfies following formula :-0.4＜f1/f234＜0, vd234P-vd234N〉30mm, wherein, f1 is the focal length of first lens 4, f234 is second and third, four lens 5,6,7 combined focal length, vd23P is the abbe number of the positive lens in two, three lens 5,6 groups, and vd23N is the abbe number of the negative lens in two, three lens 5,6 groups.
The first lens 4 of system has positive refractive power, the second lens 5 have negative refractive power, three, the 4th lens 6,7 have positive refractive power, the combination of the second lens 5, the 3rd lens 6 and the 4th lens 7 has negative refractive power, thereby so that the picture side of optical system main face forward shift, thereby so that system length shortening.
Claims (3)
1. an optical lens comprises lens barrel (1) and bearing (2) and diaphragm (3), is respectively equipped with from outside to inside first lens (4), the second lens (5), the 3rd lens (6) in lens barrel (1), the 4th lens (7); It is characterized in that: described first lens (4) is the non-spherical lens of biconvex, the cross section of described the second lens (5) is the falcate sphere, the cross section of described the 3rd lens (6) is the aspheric surface of hyperbola, and the cross section of described the 4th lens (7) is the aspheric surface of hyperbolic shape; Be respectively equipped with the light-shielding sheet (8) of the veiling glare eliminated of annular on the surface of contact of described first lens (4), the second lens (5), the 3rd lens (6), the 4th lens (7) adjacent lens; The first surface of described first lens (4) is oval aspherical shape, and second is oblate ellipsoid; The system element characteristic of first lens (4), the second lens (5), the 3rd lens (6) satisfies following formula :-0.4＜f1/f234＜0, vd234P-vd234N〉30mm; Be provided with for the spacer ring (10) that guarantees the distance between the lens between the surface of contact of the below of the 3rd lens (6) and the 4th lens (7).
2. a kind of optical lens according to claim 1, it is characterized in that: the aspheric surface configuration of first lens (4), the 3rd lens (6), the 4th lens (7) satisfies 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
3. one one kinds of optical lens according to claim 1, it is characterized in that: in the cavity of described lens barrel (1) and bearing (2), the rear portion of the 4th lens (7) also is provided with optical filter (9), and this optical filter (9) is fixed on the bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104027146A CN102928964A (en) | 2012-10-20 | 2012-10-20 | Optical lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104027146A CN102928964A (en) | 2012-10-20 | 2012-10-20 | Optical lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102928964A true CN102928964A (en) | 2013-02-13 |
Family
ID=47643801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104027146A Pending CN102928964A (en) | 2012-10-20 | 2012-10-20 | Optical lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102928964A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107728283A (en) * | 2017-11-24 | 2018-02-23 | 中山依瓦塔光学有限公司 | The white fish eye lens of leakproof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040012859A1 (en) * | 2002-07-17 | 2004-01-22 | Pentax Corporation | Zoom lens system |
| US20060119957A1 (en) * | 2004-12-08 | 2006-06-08 | Ching-Chin Wu | Zoom lens |
| JP2006337806A (en) * | 2005-06-03 | 2006-12-14 | Matsushita Electric Ind Co Ltd | Zoom lens |
| CN201032495Y (en) * | 2007-02-01 | 2008-03-05 | 中山联合光电科技有限公司 | High quality minisize optical lens |
| CN201116944Y (en) * | 2007-11-20 | 2008-09-17 | 中山联合光电科技有限公司 | High magnification, small volume and fast zooming optical system |
-
2012
- 2012-10-20 CN CN2012104027146A patent/CN102928964A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040012859A1 (en) * | 2002-07-17 | 2004-01-22 | Pentax Corporation | Zoom lens system |
| US20060119957A1 (en) * | 2004-12-08 | 2006-06-08 | Ching-Chin Wu | Zoom lens |
| JP2006337806A (en) * | 2005-06-03 | 2006-12-14 | Matsushita Electric Ind Co Ltd | Zoom lens |
| CN201032495Y (en) * | 2007-02-01 | 2008-03-05 | 中山联合光电科技有限公司 | High quality minisize optical lens |
| CN201116944Y (en) * | 2007-11-20 | 2008-09-17 | 中山联合光电科技有限公司 | High magnification, small volume and fast zooming optical system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107728283A (en) * | 2017-11-24 | 2018-02-23 | 中山依瓦塔光学有限公司 | The white fish eye lens of leakproof |
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Application publication date: 20130213 |