CN202916489U - Optical system with aspheric surface lens structure - Google Patents
Optical system with aspheric surface lens structure Download PDFInfo
- Publication number
- CN202916489U CN202916489U CN 201220540304 CN201220540304U CN202916489U CN 202916489 U CN202916489 U CN 202916489U CN 201220540304 CN201220540304 CN 201220540304 CN 201220540304 U CN201220540304 U CN 201220540304U CN 202916489 U CN202916489 U CN 202916489U
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- lens
- optical system
- aspheric
- bearing
- aspheric surface
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Abstract
The utility model relates to an optical system with an aspheric surface lens structure which is applied to miniature optical lens of high-pixel cell phones and high-image-quality cameras. In order to overcome the defects of the prior art, the utility model provides an optical system with an aspheric surface lens structure, which has the advantages of high pixel and small size and can be used in digital cameras and cell phones. The optical system with the aspheric surface lens structure comprises a lens cone and a bearing base, wherein a diaphragm is arranged at the front end of the lens cone; a first lens, a second lens and a third lens are respectively arranged behind the diaphragm; and the first lens is a crescent aspheric surface lens; and sections of the second lens and the third lens are hyperbola aspheric surfaces. The optical system with the aspheric surface lens structure is mainly applied to the aspect of cameras and cell phones.
Description
[technical field]
The utility model relates to a kind of optical lens, relates in particular to a kind of optical system of aspheric lens structures 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 shortcoming, the utility model is made a large amount of improvement.
[utility model content]
The utility model has overcome the deficiencies in the prior art, provides a kind of high pixel, volume little, can be used in the optical system of the aspheric lens structures of digital camera and mobile phone.
In order to solve the technical matters of above-mentioned existence, the utility model adopts following technical proposal:
A kind of optical system of aspheric lens structures comprises lens barrel and bearing, is provided with diaphragm at the front end of lens barrel, is respectively equipped with first lens, the second lens, the 3rd lens in the diaphragm back; It is characterized in that: described first lens is the non-spherical lens of bent moon, and the cross section of described the second lens, the 3rd lens all is the aspheric surface of hyperbola;
The optical system of aforesaid a kind of aspheric lens structures is characterized in that: the first surface of described first lens is oval aspherical shape, and second is oblate ellipsoid;
The optical system of aforesaid a kind of aspheric lens structures is characterized in that: the light-shielding sheet that is respectively equipped with the veiling glare eliminated of annular at the surface of contact of described first lens and the second lens;
The optical system of aforesaid a kind of aspheric lens structures is characterized in that: the aspheric surface configuration of the second lens, the 3rd 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
The optical system of aforesaid a kind of aspheric lens structures 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;
The optical system of aforesaid a kind of aspheric lens structures is characterized in that: be provided with below the second lens and between the surface of contact of the 3rd lens for the spacer ring that guarantees the distance between the lens;
The optical system of aforesaid a kind of aspheric lens structures is characterized in that: in the cavity of described lens barrel and bearing formation, the rear portion of the 3rd lens also is provided with optical filter, and this optical filter is fixed on the bearing;
The optical system of aforesaid a kind of aspheric lens structures is characterized in that: described lens barrel is threaded on the bearing;
The optical system of aforesaid a kind of aspheric lens structures is characterized in that: the material of described lens barrel, bearing, first lens, the second lens and the 3rd lens is plastics.
The utility model compared with prior art has following advantage:
1, numerical digit camera lens of the present utility model can reach more than 2,000,000 pixels, and existing miniature digital-mirror is 100,000,300,000 pixels as first;
2, illumination image planes of the present utility model 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 utility model is high, color is clearly demarcated, and color reducibility is good;
4, the utility model can be used for the CMOS sensitive film of 3,000,000 pixels;
5, the utility model 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;
6, more crucial is because native system has adopted the all-plastic material, so cost has obtained great reduction, this product is come into the market more widely, and the processing of bearing employing special material, can be used for resistant to elevated temperatures novel plug procedure for processing.
[description of drawings]
Fig. 1 is sectional view of the present utility model;
Fig. 2 is the stereographic map that the utility model is removed base.
[embodiment]
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:
A kind of optical system of aspheric lens structures, comprise lens barrel 1 and bearing 2, described bearing 2 adopts to be threaded and is linked on the lens barrel 1, front end at lens barrel 1 is provided with diaphragm 3, diaphragm 3 is positioned at the foremost of optical system, it can be so that the eyeglass clear aperture of system be minimum, thus so that the volume miniaturization of optical system.Be provided with successively first lens 4, the second lens 5, the 3rd lens 6 in the back of diaphragm 3; Described first lens 4 is the non-spherical lens of bent moon, and the first surface of this first lens 4 is oval aspherical shape, and second is oblate ellipsoid.The first surface of described the second lens 5, the 3rd lens 6 is the aspheric surface of hyperbola, and second surface also is necessary for the aspheric surface of hyperbola, and it can be effectively so that the curvature of field reduces, and these the 3rd lens 6 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 provided with the light-shielding sheet 8 of the veiling glare eliminated of annular at the surface of contact of described first lens 4 and the second lens 5, lower into to greatest extent distortion of informed image.Be provided with between the surface of contact of the second lens 5 and the 3rd lens 6 for the spacer ring 10 that guarantees the distance between the lens.
In the cavity of described lens barrel 1 and bearing 2 formation; the rear portion of the 3rd lens 6 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 guaranteed that also the packaging technology of the model of back is carried out smoothly except the problem that solves the color aspect.
The aspheric surface configuration of the second lens 5, the 3rd lens 6 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 utility model, 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 second lens 5 and the 3rd lens 6 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, third lens 5,6 combined focal length, vd23P is the abbe number of the positive lens in second, third lens 5,6 groups, and vd23N is the abbe number of the negative lens in second, third lens 5,6 groups.
The first lens 4 of system has positive refractive power, the second lens 5 have negative refractive power, and the 3rd lens 6 have positive refractive power, and the combination of the second lens 5, the 3rd lens 6 has negative refractive power, thereby so that the picture side of optical system main face forward shift, thereby so that system length shortening.
Because lens barrel 1, bearing 2, first lens 4, the second lens 5 and the 3rd lens 6 are combined very small and exquisite, the external diameter of lens has solved the larger problem of existing external diameter all less than more than the 8mm; There is again the utility model all to adopt plastic production, so cost has obtained great reduction, this product is come into the market more widely, and bearing 2 adopts special material processing, can be used for resistant to elevated temperatures novel plug procedure for processing, because the utility model adopts the cleverly combination between eyeglass, its numerical digit camera lens can reach more than 2,000,000 pixels, small and exquisite practicality.
Claims (6)
1. the optical system of an aspheric lens structures comprises lens barrel (1) and bearing (2), is provided with diaphragm (3) at the front end of lens barrel (1), is respectively equipped with first lens (4), the second lens (5), the 3rd lens (6) in diaphragm (3) back; It is characterized in that: described first lens (4) is the non-spherical lens of bent moon, and the cross section of described the second lens (5), the 3rd lens (6) all is the aspheric surface of hyperbola; The first surface of described first lens (4) is oval aspherical shape, and second is oblate ellipsoid; Be respectively equipped with the light-shielding sheet (8) of the veiling glare eliminated of annular at the surface of contact of described first lens (4) and the second lens (5); 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.
2. the optical system of a kind of aspheric lens structures according to claim 1, it is characterized in that: the aspheric surface configuration of the second lens (5), the 3rd lens (6) 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. the optical system of a kind of aspheric lens structures according to claim 2 is characterized in that: 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 second lens (5) and the 3rd lens (6).
4. the optical system of a kind of aspheric lens structures according to claim 3, it is characterized in that: in the cavity of described lens barrel (1) and bearing (2) formation, the rear portion of the 3rd lens (6) also is provided with optical filter (9), and this optical filter (9) is fixed on the bearing.
5. the optical system of a kind of aspheric lens structures according to claim 4, it is characterized in that: described lens barrel (1) is threaded on the bearing (2).
6. the optical system of a kind of aspheric lens structures according to claim 5, it is characterized in that: the material of described lens barrel (1), bearing (2), first lens (4), the second lens (5) and the 3rd lens (6) is plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220540304 CN202916489U (en) | 2012-10-20 | 2012-10-20 | Optical system with aspheric surface lens structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220540304 CN202916489U (en) | 2012-10-20 | 2012-10-20 | Optical system with aspheric surface lens structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202916489U true CN202916489U (en) | 2013-05-01 |
Family
ID=48164790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220540304 Expired - Lifetime CN202916489U (en) | 2012-10-20 | 2012-10-20 | Optical system with aspheric surface lens structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202916489U (en) |
-
2012
- 2012-10-20 CN CN 201220540304 patent/CN202916489U/en not_active Expired - Lifetime
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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 | ||
| CP03 | Change of name, title or address |
Address after: 528400 Zhongshan Torch Development Zone, Guangdong Road, No. 10 Patentee after: UNION OPTECH Co.,Ltd. Address before: 528400 Guangdong province Zhongshan Dongli Torch Development Zone torch joint electronic city building A3 Patentee before: UNION OPTECH Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130501 |
|
| CX01 | Expiry of patent term |