CN203444159U - High image quality wide angle optical system of full-plastic aspherical lens structure - Google Patents
High image quality wide angle optical system of full-plastic aspherical lens structure Download PDFInfo
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- CN203444159U CN203444159U CN201320410506.0U CN201320410506U CN203444159U CN 203444159 U CN203444159 U CN 203444159U CN 201320410506 U CN201320410506 U CN 201320410506U CN 203444159 U CN203444159 U CN 203444159U
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Abstract
The utility model relates to a high image quality wide angle optical system of a full-plastic aspherical lens structure. The high image quality wide angle optical system comprises a supporting base and a lens barrel connected on the supporting base, a diaphragm is disposed on the front end of the lens barrel, and a first lens, a second lens, a third lens, a fourth lens and a fifth lens are disposed after the diaphragm in a cavity of the lens barrel from outside to inside; and a first separating loop is disposed between the first lens and the second lens, and separating loops are respectively disposed between the second lens and the third lens, between the third lens and the fourth lens, and between the fourth lens and the fifth lens. The first lens is a positive focal length lens with two oblate aspheric surfaces; two surfaces of the second lens are two crescent negative focal length lenses, a first surface of a surface facing to an object is a circular aspheric surface, and a second surface of a surface facing to an image is a hyperbolic aspheric surface; the third lens is a positive focal length lens with two circular aspheric surfaces; two surfaces of the fourth lens are two positive focal length lenses, a first surface of a surface facing to the object is a circular aspheric surface, and a second surface of a surface facing to the image is a hyperbolic aspheric surface; and the fifth lens is a negative focal length lens, a first surface of a surface facing to the object is a circular aspheric surface, and a second surface of a surface facing to the image is a hyperbolic aspheric surface.
Description
[technical field]
The utility model relates to a kind of optical lens, relates in particular to a kind of minisize optical lens that is applied to high-pixel mobile phone, high picture element camera.
[background technology]
The such shortcoming of the digital camera lens ubiquity of camera cell phone of using at present: pixel is lower, physical dimension is larger.On market, the camera cell phone of main flow is mainly the low configuration camera lens of 2,000,000,3,000,000 pixels now, no matter captured image picture element is that whole sharpness or the aspects such as homogeneity of illumination is all not ideal enough, can only be used as standby picture or generally appreciate, and being enough to far from print exquisite photo; And camera cell phone is bigger than normal by the profile of digital camera lens, external diameter is generally greater than M8, and be confined to adopt CCD sensitive film for high pixel chip, and CCD technology is controlled in Japanese manufacturer hand, comparatively leading product is obtained very difficult, simultaneously long for the camera lens of CCD sensitive film, optical system overall length is greater than 8mm, uses on built-in camera cell phone and seems that volume is larger.
The utility model, in order to overcome above shortcoming, has carried out a large amount of improvement.
[summary of the invention]
The utility model has overcome the deficiencies in the prior art, provides a kind of high pixel, volume little, can be used in the high-pixel optical lens of digital camera and mobile phone.
In order to solve the technical matters of above-mentioned existence, the present invention has adopted following technical proposal:
A kind of high picture element wide-angle optics of all-plastic aspheric lens structures, it is characterized in that comprising bearing 1 and being connected to the lens barrel 2 in bearing, lens barrel front end is provided with diaphragm 3, in the cavity of lens barrel 2, after diaphragm, be provided with successively from outside to inside first lens 4, the second lens 5, the 3rd lens 6, the 4th lens 7, the 5th lens 8; Between described first lens 4 and the second lens 5, be provided with between the first spacer ring 9, the second lens 5 and the 3rd lens 6 and be provided with between spacer ring 10, the 3rd lens 6 and the 4th lens 7 and be provided with between spacer ring 11, the 4th lens 7 and the 5th lens 8 and be provided with spacer ring 12; Described first lens 4 is positive focal length lens, and two surface is oblate type aspheric surface; The second lens 5 are for being the negative focal length lens of meniscus shape, and its first surface 51 towards object plane is circular aspheric surface, towards second 52 of image planes, are hyperbolic curve aspheric surface; The 3rd lens 6 are positive focal length lens, and two surface is round-shaped aspheric surface; The 4th lens 7 are positive focal length lens, and its first surface 71 towards object plane is circular aspheric surface, towards second 72 of image planes, are hyperbolic curve aspheric surface; The 5th lens 8 are negative focal length lens, and its first surface 81 towards object plane is circular aspheric surface, towards second 82 of image planes, are hyperbolic curve aspheric surface.
The high picture element wide-angle optics of a kind of all-plastic aspheric lens structures as above, it is characterized in that described first lens, the second lens, the 3rd lens, the 4th lens, the system element characteristic of the 5th lens meets following formula :-1<f1/f2<1,-2<f4/f5<2, vd2≤31, vdp1-vdp2>25, vd P3-vd P2>25, vd P4-vd P2>25, vd P5-vd P2>25, wherein, f1 is the focal length of first lens, f2 is the focal length of the second lens, f4 is the focal length of the 4th lens, f5 is the focal length of the 5th lens, the abbe number of vd p1 first lens, vd P2 is the abbe number of the second lens, vd P3 is the abbe number of the 3rd lens, the abbe number of vd p4 the 4th lens, the abbe number of vd p5 the 5th lens.
The high picture element wide-angle optics of a kind of all-plastic aspheric lens structures as above, is characterized in that the aspheric surface configuration of described first, second, third, fourth and fifth lens meets 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 that its unit of radial coordinate is identical with length of lens unit, and k is circular cone whose conic coefficient; When k-factor is less than-1, the face shape curve of lens is hyperbolic curve, and when k-factor equals-1, the face shape curve of lens is para-curve; When k-factor is between-1 to 0, the face shape curve of lens is oval, and when k-factor equals 0, the face shape curve of lens is circular, and when 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.
The high picture element wide-angle optics of a kind of all-plastic aspheric lens structures as above, it is characterized in that: the aspheric surface that described the 3rd lens 6 are hyperbolic shape towards first face 61 of object space, and towards second 62 aspheric surface that adopts hyperbola of image space.
The high picture element wide-angle optics of a kind of all-plastic aspheric lens structures as above, is characterized in that: the radius-of-curvature of first face 51 of described the second lens is less than 3mm.
The present invention compared with prior art has advantages of as follows:
1, more than numerical digit camera lens of the present utility model can reach 8,000,000 pixels, and existing miniature digital-mirror is 2,000,000,3,000,000 pixels as first.
2, whole even, the high brightness (f-number reaches F2.0) 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 wide-angle imaging that maximum field of view angle is 90 degree.
4, sharpness of the present utility model is high, color is clearly demarcated, and color reducibility is good.
5, the utility model can be for the CMOS sensitive film of 800-2000 ten thousand pixels.
6, the utility model has also solved the problem that yields is low and cost is relatively high causing with the glass mirror processing difficulties in front glass plastic cement mixed structure.
7, more crucial is because native system has adopted all-plastic structure, thus cost relatively and glass mould mixed structure and obtained great reduction, can make this product enter more widely consumer goods market.
[accompanying drawing explanation]
Fig. 1 is diagrammatic cross-section of the present invention.
Fig. 2 is decomposing schematic representation of the present invention.
[embodiment]
Below in conjunction with accompanying drawing, describe the present invention:
As shown in Figure 1, a kind of high picture element wide-angle optics of all-plastic aspheric lens structures, can be for relatively cheap high pixel CMOS sensitive film, include bearing 1 and be connected to the lens barrel 2 in bearing, lens barrel front end is provided with diaphragm 3, in the cavity of lens barrel 2, after diaphragm, be provided with successively from outside to inside first lens 4, the second lens 5, the 3rd lens 6, the 4th lens 7, the 5th lens 8.Between described first lens 4 and the second lens 5, be provided with between the first spacer ring 9, the second lens 5 and the 3rd lens 6 and be provided with between spacer ring 10, the 3rd lens 6 and the 4th lens 7 and be provided with between spacer ring 11, the 4th lens 7 and the 5th lens 8 and be provided with spacer ring 12.Described first lens 4 is positive focal length lens, and two surface is oblate type aspheric surface.The second lens 5 are for being the negative focal length lens of meniscus shape, and its first surface 51 towards object plane is circular aspheric surface, towards second 52 of image planes, are hyperbolic curve aspheric surface.The 3rd lens 6 are positive focal length lens, and two surface is round-shaped aspheric surface.The 4th lens 7 are positive focal length lens, and its first surface 71 towards object plane is circular aspheric surface, towards second 72 of image planes, are hyperbolic curve aspheric surface.The 5th lens 8 are negative focal length lens, and its first surface 81 towards object plane is circular aspheric surface, towards second 82 of image planes, are hyperbolic curve aspheric surface.This is with regard to the effective problem that has solved the various aberration equilibriums in the wide-angle lens design of large aperture.
Described first lens, the 3rd lens, the 3rd lens, the 4th lens, the system element characteristic of the 5th lens meets following formula :-1<f1/f2<1,-2<f4/f5<2, vd2≤31, vdp1-vdp2>25, vd P3-vd P2>25, vd P4-vd P2>25, vd P5-vd P2>25, wherein, f1 is the focal length of first lens, f2 is the focal length of the second lens, f4 is the focal length of the 4th lens, f5 is the focal length of the 5th lens, the abbe number of vd p1 first lens, vd P2 is the abbe number of the second lens, vd P3 is the abbe number of the 3rd lens, the abbe number of vd p4 the 4th lens, the abbe number of vd p5 the 5th lens.
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 and the second lens as far as possible; Distance between the second lens and the 3rd lens needs to increase as far as possible simultaneously.
The aspheric surface configuration of described first, second, third, fourth and fifth lens meets 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 that its unit of radial coordinate is identical with length of lens unit, and k is circular cone whose conic coefficient; When k-factor is less than-1, the face shape curve of lens is hyperbolic curve, and when k-factor equals-1, the face shape curve of lens is para-curve; When k-factor is between-1 to 0, the face shape curve of lens is oval, and when k-factor equals 0, the face shape curve of lens is circular, and when 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.By above parameter, can accurately set the geomery of lens front and back both-sided aspherical.
The aspheric surface that described the 3rd lens 6 are hyperbolic shape towards first face 61 of object space, and towards second 62 aspheric surface that adopts hyperbola of image space.It can further make the curvature of field minimize effectively.
Bearing 1 is linked on the excircle of lens barrel 2 rear ends, and between bearing and lens barrel, threaded engagement is fixed.
In the cavity of lens barrel 2 and bearing 1, the rear portion of the 5th lens is also provided with optical filter; light enters from optical filter; optical filter has certain protective effect to CMOS sensitive chip, simultaneously also filters a part of light, makes image color beautiful and have good color reducibility sharp keen time.It has also guaranteed the carrying out of the COB packaging technology of Module below except solving the problem of color aspect.
Diaphragm is positioned at lens barrel front end, and it can reduce the susceptibility of system to eccentricity of glasses lens manufacturing tolerance so that the eyeglass clear aperture of system is little simultaneously, thereby makes volume miniaturization and the easily mass production of optical system.
The radius-of-curvature of first face 51 of described the second lens is less than 3mm, and it can be so that the length of whole camera lens be as short as below 4mm most, and spherical aberration reduces.
First lens in this optical lens has positive refractive power, the second lens have negative refractive power, and the 3rd has positive refractive power, and the 4th lens have positive refractive power, the 5th lens have negative refractive power, thereby make the image space main face forward shift of optical system, thereby system length is shortened.
Surface data gathers:
Surface data details:
Surface OBJ standard
Surface STO standard:
Claims (4)
1. the high picture element wide-angle optics of an all-plastic aspheric lens structures, it is characterized in that comprising bearing (1) and being connected to the lens barrel (2) in bearing, lens barrel front end is provided with diaphragm (3), in the cavity of lens barrel (2), after diaphragm, be provided with successively from outside to inside first lens (4), the second lens (5), the 3rd lens (6), the 4th lens (7), the 5th lens (8); Between described first lens (4) and the second lens (5), be provided with the first spacer ring (9), between the second lens (5) and the 3rd lens (6), be provided with between spacer ring (10), the 3rd lens (6) and the 4th lens (7) and be provided with between spacer ring (11), the 4th lens (7) and the 5th lens (8) and be provided with spacer ring (12); Described first lens (4) is positive focal length lens, and two surface is oblate type aspheric surface; The second lens (5) are for being the negative focal length lens of meniscus shape, and its first surface towards object plane (51) is circular aspheric surface, towards second (52) of image planes, is hyperbolic curve aspheric surface; The 3rd lens (6) are positive focal length lens, and two surface is round-shaped aspheric surface; The 4th lens (7) are positive focal length lens, and its first surface towards object plane (71) is circular aspheric surface, towards second (72) of image planes, are hyperbolic curve aspheric surface; The 5th lens (8) are negative focal length lens, and its first surface towards object plane (81) is circular aspheric surface, towards second (82) of image planes, are hyperbolic curve aspheric surface.
2. the high picture element wide-angle optics of a kind of all-plastic aspheric lens structures according to claim 1, it is characterized in that described first lens, the second lens, the 3rd lens, the 4th lens, the system element characteristic of the 5th lens meets following formula :-1<f1/f2<1,-2<f4/f5<2, vd2≤31, vdp1-vdp2>25, vd P3-vd P2>25, vd P4-vd P2>25, vd P5-vd P2>25, wherein, f1 is the focal length of first lens, f2 is the focal length of the second lens, f4 is the focal length of the 4th lens, f5 is the focal length of the 5th lens, the abbe number of vd p1 first lens, vd P2 is the abbe number of the second lens, vd P3 is the abbe number of the 3rd lens, the abbe number of vd p4 the 4th lens, the abbe number of vd p5 the 5th lens.
3. the high picture element wide-angle optics of a kind of all-plastic aspheric lens structures according to claim 2, it is characterized in that: described the 3rd lens (6) are the aspheric surfaces of hyperbolic shape towards first face (61) of object space, and towards second (62) of image space, adopt the aspheric surface of hyperbola.
4. the high picture element wide-angle optics of a kind of all-plastic aspheric lens structures according to claim 1, is characterized in that: the radius-of-curvature of first face (51) of described the second lens is less than 3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320410506.0U CN203444159U (en) | 2013-07-10 | 2013-07-10 | High image quality wide angle optical system of full-plastic aspherical lens structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320410506.0U CN203444159U (en) | 2013-07-10 | 2013-07-10 | High image quality wide angle optical system of full-plastic aspherical lens structure |
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| Publication Number | Publication Date |
|---|---|
| CN203444159U true CN203444159U (en) | 2014-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320410506.0U Expired - Lifetime CN203444159U (en) | 2013-07-10 | 2013-07-10 | High image quality wide angle optical system of full-plastic aspherical lens structure |
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| Country | Link |
|---|---|
| CN (1) | CN203444159U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103885158A (en) * | 2014-03-24 | 2014-06-25 | 中山联合光电科技有限公司 | Small optical lens |
| CN104914558A (en) * | 2014-03-14 | 2015-09-16 | 光燿科技股份有限公司 | Imaging lens group |
-
2013
- 2013-07-10 CN CN201320410506.0U patent/CN203444159U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104914558A (en) * | 2014-03-14 | 2015-09-16 | 光燿科技股份有限公司 | Imaging lens group |
| CN103885158A (en) * | 2014-03-24 | 2014-06-25 | 中山联合光电科技有限公司 | Small optical lens |
| CN103885158B (en) * | 2014-03-24 | 2016-03-02 | 中山联合光电科技有限公司 | A kind of compact optical camera lens |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140219 |
|
| CX01 | Expiry of patent term |