CN104238117B - Low-cost low-temperature-drift infrared optical confocal system - Google Patents
Low-cost low-temperature-drift infrared optical confocal system Download PDFInfo
- Publication number
- CN104238117B CN104238117B CN201410528139.3A CN201410528139A CN104238117B CN 104238117 B CN104238117 B CN 104238117B CN 201410528139 A CN201410528139 A CN 201410528139A CN 104238117 B CN104238117 B CN 104238117B
- Authority
- CN
- China
- Prior art keywords
- lens
- low
- drift
- temperature
- cost low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Lenses (AREA)
Abstract
The invention discloses a low-cost low-temperature-drift infrared optical confocal system. According to the technical scheme, the low-cost low-temperature-drift infrared optical confocal system is characterized by comprising a first lens, a diaphragm, a second lens, a third lens, a filter and a photosensitive chip sequentially from objective side to image side; the first lens is a glass spherical lens with negative focal power; the second lens is a plastic non-spherical lens with positive focal power; the third lens is a plastic non-spherical lens with negative focal power. The low-cost low-temperature-drift infrared optical confocal system needs only three lenses, greatly less than those of the prior art, and cost is greatly reduced; the low-cost low-temperature-drift infrared optical confocal system can take vivid images at the temperature from -50 DEG C to 90 DEG C and requires no refocusing.
Description
[technical field]
The present invention relates to a kind of optical system, particularly relate to one and be applied to vehicle-mounted, monitoring system
Low Drift Temperature, the infrared confocal optical system of low cost.
[background technology]
High-performance camera lens used by the most vehicle-mounted, monitoring causes due to more employing all-glass construction
High cost, low cost camera lens then due to the use of glass lens make system temperature drift excessive,
Service life reduces, and uses process affected by environment very big, can photograph clear figure under room temperature
Sheet, but more difficult under high temperature and low temperature environment photograph clear picture, needing to re-focuse could be clear
Clear imaging, or under complex environment, in the system short time, it is difficult to normal work etc..Far away can not
Meet that vehicle-mounted, monitoring system requires complex environment hypograph definition and verity and long time
Between normally use, it is impossible to meet be actually needed.
" a kind of Low Drift Temperature low cost high pixel is infrared common in the previous application for a patent for invention of my company
Focus optical system ", Application No.: 201410203579.1, this patent uses six battery of lens
Become a kind of and there is Low Drift Temperature, low cost and the infrared confocal optical system of high pixel, but right
In the infrared confocal optical system that pixel request is the highest, the optical system cost of this patent remains to
Higher, it is difficult to meet on market the pixel infrared confocal optical system that the while of slightly lower, cost is lower
Differentiated demand.
[summary of the invention]
The present invention seeks to overcome the deficiencies in the prior art, it is provided that a kind of Low Drift Temperature and number of lenses
Mesh less makes the infrared confocal optical system that cost is lower.
The present invention is achieved by the following technical solutions:
A kind of low cost low temperature drift infrared confocal optical system, it is characterised in that: from thing side to
Image space includes the first lens 1, diaphragm the 2, second lens the 3, the 3rd lens 4 successively, filters
Sheet 5, sensitive chip 6, described first lens 1 are the glass spherical lens of negative power, institute
Stating the plastic aspheric lens that the second lens 3 are positive light coke, described 3rd lens 4 are negative light
The plastic aspheric lens of focal power.
The infrared confocal optical system of low cost low temperature drift as above, it is characterised in that: institute
State the first lens 1 for meniscus lens or planoconcave lens and or biconcave lens, described the
Two lens 3 biconvex non-spherical lenses, described 3rd lens 4 are falcate non-spherical lens.
The infrared confocal optical system of low cost low temperature drift as above, it is characterised in that: institute
The first lens 1 stated and the second lens 3 use low dispersion material, and the 3rd lens 4 use high color
Dissipate material.
The infrared confocal optical system of low cost low temperature drift as above, it is characterised in that: the
The aspheric surface face type of two lens 3 and the 3rd lens 4 meets below equation:
Z=cy2/{1+[1-(1+k)c2y2]1/2}+a1y2+a2y4+a3y6+a4y8+a5y10+a6y12+a7y14+a8y16。
The infrared confocal optical system of low cost low temperature drift as above, it is characterised in that: institute
State first lens the 1, second lens 3 and the 3rd lens 4 are all coated with visible ray and infrared light is anti-reflection
Film.
Compared with prior art, the present invention has the following advantages:
1, the present invention includes three pieces of lens altogether, and number greatly reduces, and is ensureing optical property
While, significantly reduce cost.
2, optical system in the market all uses glass lens or glass for reducing cost
Glass opthalmic plastic eyeglass mix and match, so can cause temperature drift to increase, at normal temperatures can also Cheng Qing
Clear image, but be difficult to get a distinct image or need with the most right under high temperature and low temperature
Burnt ability blur-free imaging.The present invention can photograph from low temperature (-50 DEG C) to high temperature (90 DEG C)
Picture rich in detail, and without re-focusing.
3, optical system in the market is for improving optical property, and usual first piece of lens are adopted
With plastic material, cause optical system life-span under the complex environments such as high temperature, intense light irradiation, dust storm
Significantly reduce；First piece of lens of the present invention use glass material, be no matter home or
The complex environments such as high temperature, intense light irradiation, dust storm, its service life is the most unaffected.
4, optical system in the market is at the low ring of the visibilitys such as dust, smog, light rain
Border almost shoots less than image clearly.The present invention use spherical lens and non-spherical lens,
Just dispersion material with the use of, well corrected the second order spectrum caused by infrared light, made
White light can become in image planes with infrared light clearly as, at rings such as dust, smog, light rain
Border can photograph clear, the black white image of high-contrast.
[accompanying drawing explanation]
Fig. 1 is the optical system diagram of the present invention.
In figure；1 is the first lens；2 is diaphragm；3 is the second lens；4 is the 3rd lens；
5 is optical filter；6 is sensitive chip；S1 is first, the first lens, and S2 is the first lens
Two；S4 is first, the second lens, and S5 is second, the second lens；S6 is the 3rd lens
First, S7 is second, the 3rd lens；S8 is optical filter first, and S9 is optical filter second
Face.
[detailed description of the invention]
The invention will be further described below in conjunction with the accompanying drawings:
The infrared confocal optical system of a kind of low cost low temperature drift, includes the most successively
There are the first lens 1, diaphragm the 2, second lens the 3, the 3rd lens 4, optical filter 5, photosensitive core
Sheet 6, the face of each lens is followed successively by first S1 of the first lens, the first lens from the object side to the image side
Second S2；Second first, lens S4, the second second, lens S5；3rd lens first
Face S6, the 3rd second, lens S7；First S8 of optical filter；Second S9 of optical filter.Institute
Stating the glass spherical lens that the first lens 1 are negative power, described second lens 3 are that positive light is burnt
The plastic aspheric lens of degree, described 3rd lens 4 are that the plastic aspherical element of negative power is saturating
Mirror.
In order to realize low cost, the second lens 3 during design, the 3rd lens 4 all use plastics,
Reduce cost to greatest extent；First lens 1 use the most rational according to design focal length
Spherical glass designs so that cost is preferably minimized；Reasonably combined effective rectification of each eyeglass is
All kinds of aberrations of system so that the performance of system is substantially improved.First lens 1 use glass sphere
Eyeglass, the characteristic such as high temperature resistant, corrosion-resistant, damage resistant utilizing glass material, protect whole light
System assembling, transport, use during be difficult to be scratched, at high temperature, low temperature, high light
According to being difficult to by wind solution, destruction under the adverse circumstances such as, dust storm, thus extend the use longevity of system
Life.
In order to realize Low Drift Temperature, during design, the first lens 1 use glass spherical lens, and second is saturating
Mirror the 3, the 3rd lens 4 use plastic aspheric lens, suitable glass lens material, reasonably
Focal power distribution and lens shape collocation (referring to the actual design case of lower section) make system exist
Under high and low temperature environment, temperature drift is apart from minimum, effectively solves owing to variations in temperature causes
The problem that resolution declines or need to re-focuse.
Described first lens 1 profile according to required focal length can be meniscus lens or plano-concave saturating
Mirror and or biconcave lens, described second lens 3 biconvex non-spherical lens, described 3rd saturating
Mirror 4 is falcate non-spherical lens.
The first described lens 1 and the second lens 3 use low dispersion material, and the 3rd lens 4 are adopted
By high dispersion material, spherical lens and non-spherical lens, just dispersion material with the use of, very
The good rectification second order spectrum caused by infrared light so that white light and infrared light can be in image planes
Upper one-tenth clearly as.
Described first lens the 1, second lens 3 and the 3rd lens 4 are all coated with visible ray and infrared
Light anti-reflection film so that visible ray and infrared light have good transmitance on each lens, it is ensured that
The brightness of entire picture is also ensure that while imaging clearly.
Following table is actual design case.
| Face is numbered | Face type | Radius | Thickness | Material | Effective diameter |
| Object plane | Standard sphere | INFINITY | INFINITY | AIR | INFINITY |
| S1 | Standard sphere | 21.045 | 0.50 | H-QK3L | 8.08 |
| S2 | Standard sphere | 5.593 | 5.52 | AIR | 6.84 |
| Diaphragm | Standard sphere | INFINITY | 4.051 | AIR | 3.22 |
| S4 | Even number aspheric surface | 4.824 | 4.085 | F52R | 5.6 |
| S5 | Even number aspheric surface | -2.089 | 0.593 | AIR | 6.76 |
| S6 | Even number aspheric surface | -1.066 | 1.123 | SP1516 | 6.40 |
| S7 | Even number aspheric surface | -2.152 | 0.5 | AIR | 5.80 |
| S8 | Standard sphere | INFINITY | 0.8 | K9L | 6 |
| S9 | Standard sphere | INFINITY | 5 | AIR | 6.1 |
| Image planes | Standard sphere | INFINITY | 6.9 |
The aspheric surface face type of described second lens 3 and the 3rd lens 4 meets below equation:
Z=cy2/{1+[1-(1+k)c2y2]1/2}+a1y2+a2y4+a3y6+a4y8+a5y10+a6y12+a7y14+a8y16。
In formula, parameter c is the curvature corresponding to radius, y be its unit of radial coordinate and lens long
Degree unit is identical, and k is circular cone whose conic coefficient.When k-factor is less than-1, face type curve is
Hyperbola, is parabola during equal to-1, is oval time between-1 to 0, for circle during equal to 0
Shape.a1To a8Represent the coefficient corresponding to each radial coordinate respectively, can essence by above parameter
The really geomery of both-sided aspherical before and after setting lens.
The wherein asphericity coefficient in each face such as following table, the E in following table4E6E8E10The most corresponding non-
" a in spherical formula2a3a4a5”.The inconsistent aspherical formula that is primarily due to of label is for reason
Opinion mathematical formulae, and " E4E6E8E10" it is the label used in engineering, its practical significance is consistent.
As for remaining asphericity coefficient " a1a6a7a8" can be set according to design requirement, aspheric
Face formula is without change.
| k | E4 | E6 | E8 | E10 | |
| S4 | -13.445 | 0.016931034 | -0.0029462719 | 0.00039036416 | -2.9105088e-005 |
| S5 | -0.952 | 0.023990529 | -0.0091260591 | 0.00021319725 | -7.1383382e-006 |
| S6 | -1.568 | 0.031929768 | -0.0089481786 | 0.00039120769 | -1.0086031e-005 |
| S7 | -0.926 | 0.030068547 | -0.0012489553 | -7.8777698e-005 | 1.1255268e-005 |
The above is only the detailed description of the invention of the application, it is noted that lead for this technology
For the those of ordinary skill in territory, on the premise of without departing from the application principle, it is also possible to make
Some improvements and modifications, these improvements and modifications also should be regarded as the protection domain of the application.
Claims (4)
1. the infrared confocal optical system of a low cost low temperature drift, it is characterised in that: from
Thing side include successively to image space the first lens (1), diaphragm (2), the second lens (3),
Three lens (4), optical filter (5), sensitive chip (6), described first lens (1) are negative
The glass spherical lens of focal power, described second lens (3) are the plastics aspheric of positive light coke
Face lens, described 3rd lens (4) are the plastic aspheric lens of negative power；Described
One lens (1) are planoconcave lens or biconcave lens, described second lens (3) biconvex aspheric
Face lens, described 3rd lens (4) are falcate non-spherical lens.
The infrared confocal optics system of low cost low temperature the most according to claim 1 drift
System, it is characterised in that: described the first lens (1) and the second lens (3) use low dispersion
Material, the 3rd lens (4) use high dispersion material.
The infrared confocal optics system of low cost low temperature the most according to claim 1 drift
System, it is characterised in that: the aspherical shape of the second lens (3) and the 3rd lens (4) meets
Below equation:
Z=cy2/{1+[1-(1+k)c2y2]1/2}+a1y2+a2y4+a3y6+a4y8+a5y10+a6y12+
a7y14+a8y16。
The infrared confocal optics system of low cost low temperature the most according to claim 2 drift
System, it is characterised in that: described first lens (1), the second lens (3) and the 3rd lens (4)
All it is coated with visible ray and infrared light anti-reflection film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410528139.3A CN104238117B (en) | 2014-10-09 | 2014-10-09 | Low-cost low-temperature-drift infrared optical confocal system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410528139.3A CN104238117B (en) | 2014-10-09 | 2014-10-09 | Low-cost low-temperature-drift infrared optical confocal system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104238117A CN104238117A (en) | 2014-12-24 |
| CN104238117B true CN104238117B (en) | 2017-01-11 |
Family
ID=52226532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410528139.3A Active CN104238117B (en) | 2014-10-09 | 2014-10-09 | Low-cost low-temperature-drift infrared optical confocal system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104238117B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10170819A (en) * | 1996-12-16 | 1998-06-26 | Kiyousera Opt Kk | Photographic lens |
| JP3925748B2 (en) * | 1997-04-30 | 2007-06-06 | フジノン株式会社 | Small lens |
| CA2333081A1 (en) * | 1998-06-05 | 1999-12-09 | Ellis I. Betensky | Inverse triplet lens assemblies |
| JP3714663B2 (en) * | 2001-05-25 | 2005-11-09 | フジノン株式会社 | Single focus lens |
| CN1213323C (en) * | 2002-04-29 | 2005-08-03 | 南开大学 | Infrared refraction-diffraction three-piece heat-abstraction optical imaging system structure |
| CN100476493C (en) * | 2006-01-24 | 2009-04-08 | 亚洲光学股份有限公司 | Image pickup optical system |
| CN202093231U (en) * | 2011-06-24 | 2011-12-28 | 浙江舜宇光学有限公司 | Near-infrared camera lenses |
| CN104007542B (en) * | 2014-06-10 | 2017-03-15 | 舜宇光学(中山)有限公司 | A kind of optical lens for realizing temperature-compensating |
| CN204101813U (en) * | 2014-10-09 | 2015-01-14 | 中山联合光电科技有限公司 | A kind of infrared confocal optical system of low cost low temperature drift |
-
2014
- 2014-10-09 CN CN201410528139.3A patent/CN104238117B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104238117A (en) | 2014-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105204140B (en) | A kind of tight shot | |
| CN109445067A (en) | Optical imaging lens and imaging device | |
| CN103777311A (en) | High resolution optical system | |
| CN103558677A (en) | Athermal monitoring camera lens | |
| CN203759282U (en) | Annular shading element and optical image capturing lens group | |
| CN105607234B (en) | A kind of fish eye lens | |
| CN107065137A (en) | Ultra wide-angle imaging optical system and its camera module of application | |
| CN106154501A (en) | Fish eye lens | |
| CN107085283B (en) | Ultra-high definition low-distortion glass-plastic mixed 6.0mm prime lens | |
| CN205507200U (en) | Big light ring camera lens of near -infrared | |
| WO2016176911A1 (en) | Small-size wide-angle camera lens | |
| CN203595856U (en) | Athermal monitoring camera lens | |
| CN105892024B (en) | A kind of high definition fish eye optical camera lens | |
| CN205427290U (en) | Confocal, high pixel of high low temperature, little distortion, no parasitics light optical system | |
| CN107037570B (en) | Athermalization high-definition prime lens | |
| CN108983396A (en) | A kind of fish eye lens | |
| CN209167661U (en) | A kind of large aperture near-infrared camera lenses | |
| CN106918897A (en) | A kind of compact ultra-wide angle day and night confocal opticses camera lens | |
| CN206671663U (en) | A kind of ultra-wide angle day and night confocal opticses camera lens | |
| CN103941395B (en) | A kind of Low Drift Temperature low cost infrared confocal optical system of high pixel | |
| CN207281374U (en) | New fish eye lens | |
| CN109507788A (en) | A kind of large aperture near-infrared camera lenses | |
| CN211955960U (en) | Optical imaging lens with fixed focus and low chromatic aberration | |
| CN205809396U (en) | A kind of high definition fish eye optical camera lens | |
| CN104898258A (en) | High-low-temperature, infrared-confocal, super-small-distortion and super-wide-angle optical system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 528400 1-3, Guangdong, Zhongshan, Torch Development Zone, road, No. Patentee after: Zhong Shan joint opto-electronic Science and Technology Co., Ltd. Address before: 528400 Zhongshan Torch Development Zone, Guangdong Road, No. 10 Patentee before: Union Optech (Zhongshan) Co., Ltd. |