CN102967926B - Vehicle-mounted optical lens for monitoring - Google Patents
Vehicle-mounted optical lens for monitoring Download PDFInfo
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- CN102967926B CN102967926B CN201210445633.4A CN201210445633A CN102967926B CN 102967926 B CN102967926 B CN 102967926B CN 201210445633 A CN201210445633 A CN 201210445633A CN 102967926 B CN102967926 B CN 102967926B
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Abstract
The invention relates to a vehicle-mounted optical lens for monitoring. The vehicle-mounted optical lens for monitoring comprises a lens barrel, wherein a first lens, a second lens, a third lens, a diaphragm and a fourth lens which are sequentially arranged in the lens barrel from object space to image space. The first lens is a falcate spherical lens, the second lens is falcate aspheric lens, a first surface of the second lens facing the object space is a hyperbolic curve aspheric surface, and a second surface of the second lens facing the image space is an oval aspheric surface. The third lens is a biconvex spherical lens. The fourth lens is a falcate aspheric lens, and double surfaces of the fourth lens are hyperbolic curve aspheric surfaces. The vehicle-mounted optical lens for monitoring overcomes the shortcomings of the prior art, is high in pixel, ultra-wide in field, small in distortion and fog-transmitting, can be used for monitoring and can be used all day.
Description
[technical field]
The present invention relates to a kind of optical lens, particularly relate to and be a kind ofly applied to monitoring, the ultra-wide angle of onboard system, little distortion, high pixel Penetrating Fog day and night optical lens.
[background technology]
The shortcoming that current security protection, vehicle-mounted Large visual angle or medium visual field camera lens ubiquity are such: lens distortion is large, physical dimension is comparatively large, resolution is low, daytime and evening can not be general etc.Only has now minority camera lens, improve in certain when sacrificing other side, such as in order to realize high pixel, will distortion be done greatly, volume does greatly, captured image or be overall sharpness, that the aspects such as the authenticity of image are not ideal enough, or the clear picture of shooting on daytime, evening, the image of shooting was fuzzy especially, monitoring, the image definition of vehicle-mounted requirement and authenticity can not be met far away, and monitoring, on-vehicle lens volume bigger than normal, also do not overcome now the camera lens of above whole shortcoming.
In order to solve above-mentioned existing problem, the present invention makes useful improvement.
[summary of the invention]
The distortion that instant invention overcomes prior art is large, volume is large, pixel is low, not Penetrating Fog, day and night can not be general etc. deficiency, thus provide a kind of high pixel, can be used for monitoring, vehicle-mounted ultra-wide angle little distortion Penetrating Fog day and night optical lens.
In order to solve the technical matters of above-mentioned existence, the present invention adopts following technical proposal:
A kind of for monitoring, vehicle-mounted optical lens, it is characterized in that: comprise lens barrel 1, in lens barrel 1, be provided with the first lens 2, second lens 3, the 3rd lens 4, diaphragm 5 and the 4th lens 6 from the object side to the image side successively, described first lens 2 are falcate spherical lens; Second lens 3 are falcate non-spherical lens, and its first surface towards object space is hyperbolic curve aspheric surface, and second towards image space is oval aspheric surface; 3rd lens 4 are biconvex spherical lens; 4th lens 6 are falcate non-spherical lens, and its two sides is hyperbolic curve aspheric surface.
As above for monitoring, a vehicle-mounted optical lens, it is characterized in that: in described lens barrel 1 cavity, the 4th lens 6 are also provided with optical filter 7 towards the rear portion of image space, it is fixing in the cavities.
As above for monitoring, a vehicle-mounted optical lens, it is characterized in that: the focal power of described first lens 2 is for just, and material is glass; The focal power of the second lens 3 is negative, and material is plastics; The focal power of the 3rd lens 4 is just, material is glass; The focal power of the 4th lens 6 is just, material is plastics.
As above for monitoring, a vehicle-mounted optical lens, it is characterized in that: described first lens 2, second lens 3, the 3rd lens 4, the 4th lens 6 are all coated with the anti-reflection film of visible ray and infrared light.
As above for monitoring, a vehicle-mounted optical lens, it is characterized in that: the aspheric surface configuration of the second lens 3, the 4th lens 6 meets following equation:
The present invention compared with prior art has following advantage:
1, existing bugeye lens distortion is general comparatively large, and lens distortion of the present invention is very little, can realize less than 4%, even can reach the distortion of 1%.
2, existing ultra-wide angle or medium field angle camera lens volume are generally comparatively large, and the volume of camera lens of the present invention is little, and optics overall length is less than 10.3mm, and external diameter is within 7mm.
3, existing ultra-wide angle or medium field angle camera lens are in order to reduce distortion, volume etc., and cause resolution and then to reduce, the present invention improves the resolution of camera lens while realizing little distortion, small size.
4, existing ultra-wide angle or medium field angle camera lens, edge resolution is low, and lens edge resolution of the present invention is high, and whole image planes can become sharply defined image.
5, existing bugeye lens can only use daytime, or the clear picture shooting in evening of shooting on daytime is fuzzy especially, and while photographing picture rich in detail daytime of the present invention, also can photograph black white image that is very clear, high-contrast in the evening.
6, existing bugeye lens is almost taken less than image clearly in the visible environmental such as fog, dust, smog, light rain, and the present invention can photograph black white image that is clear, high-contrast in the visible environmental such as fog, dust, smog, light rain.
7, the depth of field of existing bugeye lens is less, can only can become large as, the depth of field of the present invention clearly within the specific limits, can become in the scope of 0.1m to infinite distance clearly as.
8, glass mirror processing difficulties and the problem that yields is low and cost is relatively high that causes in glass mirror and glass lens mixed structure before this invention also solves.
[accompanying drawing explanation]
Fig. 1 is schematic diagram of the present invention.
[embodiment]
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:
A kind of for monitoring, vehicle-mounted optical lens, comprise lens barrel 1, in lens barrel 1, be provided with the first lens 2, second lens 3, the 3rd lens 4, diaphragm 5 and the 4th lens 6 and optical filter 7 from object space to mirror side successively, optical filter 7 to be fixed in lens barrel 1 cavity and to be placed in after the 4th lens 6.In addition, after optical filter 7, sensitive film 8 is provided with.Described first lens 2 are falcate spherical lens.Second lens 3 are falcate non-spherical lens, and its first surface towards object space is hyperbolic curve aspheric surface, and second towards image space is oval aspheric surface.3rd lens 4 are biconvex spherical lens; 4th lens 6 are falcate non-spherical lens, and its two sides is hyperbolic curve aspheric surface.
In order to reduce camera lens volume, the first lens 2 and the second lens 3 adopt meniscus shaped lens, and the second lens adopt the negative lens that curvature is larger, and the high angle scattered light entering camera lens like this can be good at turning back, and camera lens volume is reduced to as possibility.In addition, adopt sphere and aspheric surface collocation to use, which reduces the quantity of lens, while reducing length, also reduce bore.
In order to reduce the change in refraction angle of light between each lens, being controlled to image distortion, structure needing the negative lens that the second lens 3 adopt curvature larger, and the interval between the first lens 2 and the second lens 3 need be reduced as far as possible.Meanwhile, diaphragm 5 is located between the 3rd lens 4 and the 4th lens 6, makes camera lens realize little distortion.
In order to realize high resolving power, the 4th lens 6 adopt two sides to be hyperbolic curve aspheric surface, can be good at the curvature of field of correction system, make image plane center and edge have suitable resolution; 3rd spherical lens 4 and the 4th non-spherical lens 6 with the use of, efficiently solve the problem of the various aberration equilibriums such as the aberration of system; System does not arrange vignetting, is provided with optical filter 7 in addition after the 4th lens 6, and to filter out veiling glare, make image planes overall evenly, bright, image planes color is beautiful simultaneously, has good color reducibility.
In order to realize day and night and mist transmitting, the aspheric surface that second lens 3 and the 4th lens 6 adopt dispersion higher, and the 3rd lens 4 adopt the spherical lens of Extra-low Dispersion, spherical lens and non-spherical lens, high chromatic dispersion material and Extra-low Dispersion material fit use, well corrected the second order spectrum caused by infrared light, make white light and infrared light can become in image planes clearly as.In addition, four pieces of lens of the present invention are all coated with visible ray and infrared light anti-reflection film, make visible ray and infrared light have good transmitance on each lens, also ensure that the brightness of entire picture while ensureing imaging clearly, the optical wavelength range of visible ray and infrared light is at 700nm-950nm.
Second lens 3, the aspheric surface configuration of the 3rd lens 4 meet following equation:
In formula, the curvature of parameter c corresponding to radius, 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, face type curve is hyperbolic curve, is para-curve when equaling-1, is oval time between-1 to 0, is circle when equaling 0.A
1to a
8represent the coefficient corresponding to each radial coordinate respectively, accurately can be set the geomery of both-sided aspherical before and after lens by above parameter.In the present invention, the first lens 2 and each of the 3rd lens 4 are spherical shape, require that k-factor is 0, the first surface of the second lens 3 and the two sides of the 4th lens 6 are hyperbolic curve aspheric surface, it is oval aspheric surface that its coefficient is less than second of the-1, the second lens 2, and its coefficient is between-1 to 0.
Claims (5)
1. one kind for monitoring, vehicle-mounted optical lens, it is characterized in that: comprise lens barrel (1), in lens barrel (1), be provided with the first lens (2), the second lens (3), the 3rd lens (4), diaphragm (5) and the 4th lens (6) from the object side to the image side successively, described first lens (2) are falcate spherical lens; Second lens (3) are falcate non-spherical lens, and its first surface towards object space is hyperbolic curve aspheric surface, and second towards image space is oval aspheric surface; 3rd lens (4) are biconvex spherical lens; 4th lens (6) are falcate non-spherical lens, and its two sides is hyperbolic curve aspheric surface.
2. according to claim 1 a kind of for monitoring, vehicle-mounted optical lens, it is characterized in that: in described lens barrel (1) cavity, the 4th lens (6) are also provided with optical filter (7) towards the rear portion of image space, and it is fixing in the cavities.
3. according to claim 1 and 2 a kind of for monitoring, vehicle-mounted optical lens, it is characterized in that: the focal power of described first lens (2) is for just, and material is glass; The focal power of the second lens (3) is negative, and material is plastics; The focal power of the 3rd lens (4) is just, material is glass; The focal power of the 4th lens (6) is just, material is plastics.
4. according to claim 3 a kind of for monitoring, vehicle-mounted optical lens, it is characterized in that: described first lens (2), the second lens (3), the 3rd lens (4), the 4th lens (6) are all coated with the anti-reflection film of visible ray and infrared light.
5. according to claim 4 a kind of for monitoring, vehicle-mounted optical lens, it is characterized in that: the aspheric surface configuration of the second lens (3), the 4th lens (6) meets following equation:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210445633.4A CN102967926B (en) | 2012-11-08 | 2012-11-08 | Vehicle-mounted optical lens for monitoring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210445633.4A CN102967926B (en) | 2012-11-08 | 2012-11-08 | Vehicle-mounted optical lens for monitoring |
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| CN102967926A CN102967926A (en) | 2013-03-13 |
| CN102967926B true CN102967926B (en) | 2015-04-22 |
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| CN201210445633.4A Active CN102967926B (en) | 2012-11-08 | 2012-11-08 | Vehicle-mounted optical lens for monitoring |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101570030B1 (en) * | 2013-12-24 | 2015-11-19 | 주식회사 코렌 | Photographic lens optical system |
| CN103941395B (en) * | 2014-05-14 | 2016-08-17 | 中山联合光电科技有限公司 | A kind of Low Drift Temperature low cost infrared confocal optical system of high pixel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1892279A (en) * | 2005-07-07 | 2007-01-10 | 三星电子株式会社 | Optical imaging system |
| CN202916490U (en) * | 2012-11-08 | 2013-05-01 | 中山联合光电科技有限公司 | Super wide angle and small distortion high pixel mist-penetrating dual-purpose optical lens |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000180719A (en) * | 1998-12-11 | 2000-06-30 | Minolta Co Ltd | Photographic lens system |
| JP2006126494A (en) * | 2004-10-28 | 2006-05-18 | Sony Corp | Imaging lens |
| TWI361914B (en) * | 2007-11-16 | 2012-04-11 | Largan Precision Co Ltd | Optical lens system for taking image |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1892279A (en) * | 2005-07-07 | 2007-01-10 | 三星电子株式会社 | Optical imaging system |
| CN202916490U (en) * | 2012-11-08 | 2013-05-01 | 中山联合光电科技有限公司 | Super wide angle and small distortion high pixel mist-penetrating dual-purpose optical lens |
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Address after: 528400 Zhongshan Torch Development Zone, Guangdong Road, No. 10 Patentee after: Zhong Shan joint opto-electronic Science and Technology Co., Ltd. Address before: 528400 Guangdong province Zhongshan Dongli Torch Development Zone torch joint electronic city building A3 Patentee before: Union Optech (Zhongshan) Co., Ltd. |