CN101963694A - Long-wave heat difference eliminating infrared optical lens - Google Patents
Long-wave heat difference eliminating infrared optical lens Download PDFInfo
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- CN101963694A CN101963694A CN2010105079628A CN201010507962A CN101963694A CN 101963694 A CN101963694 A CN 101963694A CN 2010105079628 A CN2010105079628 A CN 2010105079628A CN 201010507962 A CN201010507962 A CN 201010507962A CN 101963694 A CN101963694 A CN 101963694A
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Abstract
The invention discloses a long-wave heat difference eliminating infrared optical lens which comprises a first lens (1) with positive diopter, a second lens (2) with negative diopter and a third lens (3) with positive diopter from an object space to an image space in sequence, wherein the first lens (1) is made of a piece of crescent-shaped positive infrared glass with a convex face facing toward an object side, the second face (5) of the first lens is a diffraction face, and an aspheric surface is adopted to correct spherical aberration, coma aberration, astigmatism and other kinds of aberration; the second lens (2) is made of a piece of crescent-shaped negative infrared glass with a convex face facing toward the object side; and the third lens (3) is made of a piece of biconvex positive infrared glass, and the first face (8) of the third lens (3) is an aspheric surface so as to correct aberration. Only three lenses are used in the entire infrared optical system, so that the infrared optical system has the advantages of simple structure, small size and light weight. Good and stable imaging quality can be obtained within the temperature range of subzero 40 DEG C to 60 DEG C, and good heat difference eliminating effect is achieved.
Description
Technical field
The present invention relates generally to a kind of operating ambient temperature and changes big military field, particularly relates to a kind of long wave heat difference infrared optical lens that disappears.
Background technology
In recent years, the range of application of infrared technique is flourish, has been widely used in fields such as military affairs, public security, industrial detection.But because the thermal refractive index coefficient dn/dT of infrared optical material is bigger, dn/dT as infrared optics monocrystalline germanium commonly used is 0.000396/ ℃, be nearly 100 times of visible light glass dn/dT, therefore along with the variation of environment temperature, the refractive index of infrared optical material, the curvature of optical element and thickness, part interval etc. all can change, make infrared optical system produce hot out of focus, cause the system imaging degradation.Therefore, military infrared optics will take into full account the influence of operating ambient temperature to optical quality.The heat difference infrared technique that disappears that adopts is both at home and abroad at present mainly divided three classes: dynamo-electric active, and mechanical passive type, PASSIVE OPTICAL formula.Because dynamo-electric active and mechanical passive type all can make complex system, volume increases, and weight increases, the reliability reduction, and that the PASSIVE OPTICAL formula has is simple in structure, and volume is little, and is in light weight, and the reliability advantages of higher is the main mode of special military infrared optics.Be used for the disappear eyeglass number of infrared optical lens of heat difference of long wave all is more than three before basically, and because the temperature limitation of infra-red material monocrystalline germanium commonly used, and it is poor often to adopt the mechanical material of high thermal expansion coefficient and low thermal coefficient of expansion to make up the heat that realizes disappearing.
Therefore, demand developing a kind of long wave that under severe temperature environment, still guarantees system imaging quality heat difference infrared optical lens that disappears urgently.
Summary of the invention
The objective of the invention is to change the existing variation of present optical lens, make infrared optical system produce hot out of focus, cause the problem of system imaging degradation along with environment temperature by a kind of long wave heat difference infrared optical lens that disappears is provided.
A kind of long wave of the present invention heat difference infrared optical lens that disappears, there is not to adopt infra-red material monocrystalline germanium commonly used, but adopt infrared glass AMTIR1, can obtain in-40 ℃～60 ℃ temperature ranges well, stable image quality has prevented system imaging degradation under severe temperature environment, have simple in structure simultaneously, volume is little, and is in light weight, high reliability features.
A kind of long wave heat difference infrared optical lens that disappears comprises first lens with positive diopter successively by object space to the imaging side, have negative dioptric second lens and have the 3rd lens of positive diopter.Wherein, first lens are made of towards the just infrared glass of the curved month type of thing side a slice convex surface, second at first lens is adopted aspheric surface with spherical aberration corrector, coma, aberrations such as astigmatism simultaneously, have been introduced diffraction surfaces second of first lens, its effect has two: one, can well proofread and correct the aberration of infrared optical system, and the 2nd, the heat that can reduce infrared optical system is poor; Second lens are made of towards the negative infrared glass of the curved month type of thing side a slice convex surface; The 3rd lens are made of the just infrared glass of a slice biconvex, and adopt aspheric surface with aberration correction at first of the 3rd lens.
The long wave of the present invention heat difference infrared optical lens that disappears compared with prior art, has following remarkable advantages and beneficial effect.
Whole infrared optical system of the present invention has only been used three lens, has simple in structurely, and volume is little, lightweight advantage.There is not to adopt infra-red material monocrystalline germanium commonly used in the system, but adopt infrared glass AMTIR1, need not the method that mechanical material with different heat expansion coefficient makes up the heat difference that realizes disappearing just can obtain in-40 ℃～60 ℃ temperature ranges well, stable image quality, the reliability of the system of increase and can satisfy the military field anti-vibrating and impact and operating ambient temperature changes big requirement.Utilize the diffraction optical element negative dispersion simultaneously, the characteristic of negative hot constant has reached the poor effect of heat that well disappears.
Description of drawings
Fig. 1 is the heat difference infrared optical lens synoptic diagram that disappears of 23.6mm for the concrete focal length of implementing of the present invention;
Fig. 2 A to Fig. 2 C disappears heat difference infrared optical lens at-40 ℃ for this reason, and 20 ℃, the optical transfer function figure in the time of 60 ℃.
Embodiment
Below in conjunction with accompanying drawing specific embodiments of the invention are illustrated:
Fig. 1 is that the present invention's one concrete focal length of implementing is the heat difference infrared optical lens synoptic diagram that disappears of 23.6mm.With reference to Fig. 1, the present invention includes 3 three Infrared Lens of first lens 1, the second lens, 2, the three lens.Wherein, A is the thing side, and B is the picture side.
In this example, for better spherical aberration corrector, coma, aberrations such as astigmatism, second 5 of first lens 1 and first 8 of the 3rd lens 3 have adopted aspheric surface.Simultaneously, for the aberration that reaches good correction infrared optical system with reduce the purpose of the heat difference of infrared optical system, adopted diffraction surfaces second 5 of first lens 1.
In this example, infrared optical system has only been used three lens, does not have to adopt infra-red material monocrystalline germanium commonly used, but adopt infrared glass AMTIR1, can reduce the influence of temperature, simultaneously to infra-red material, the introducing of diffraction surfaces can well reach the poor effect of heat that disappears.Whole optical system need not electromechanical assembly, need not the special machine material, and simple in structure, volume is little, and is in light weight, and the reliability height can satisfy military field anti-vibrating and impact and operating ambient temperature variation requirement greatly.
Main optical parametric of the present invention is as follows:
Service band: 8～12 μ m;
Focal length: 23.6mm;
F/#：1；
Field angle: 31.8 ° * 24.1 °;
Transmitance:＞85%.
Fig. 2 A to Fig. 2 C be the heat difference infrared optical lens that disappears of the present invention at-40 ℃, 20 ℃, the optical transfer function figure in the time of 60 ℃, and its transverse axis represents every millimeter demand pairs, the longitudinal axis is a modulation transfer function numerical value.As can be seen from the figure, system all can obtain favorable imaging quality in-40 ℃～60 ℃ temperature ranges.
It should be noted that at last: above embodiment only in order to the explanation the present invention and and unrestricted technical scheme described in the invention; Therefore, although this instructions has been described in detail the present invention with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention; And all do not break away from the technical scheme and the improvement thereof of the spirit and scope of invention, and it all should be encompassed in the middle of the claim scope of the present invention.
Claims (1)
1. the long wave heat difference infrared optical lens that disappears comprises first lens (1) with positive diopter successively by object space to the imaging side, has the 3rd lens (3) of bearing dioptric second lens (2) and having positive diopter; It is characterized in that:
Described first lens (1) are made of towards the just infrared glass of the curved month type of thing side a slice convex surface, are diffraction surfaces in second (5) of first lens, adopt aspheric surface with aberrations such as spherical aberration corrector, coma, astigmatisms;
Described second lens (2) are made of towards the negative infrared glass of the curved month type of thing side a slice convex surface;
Described the 3rd lens (3) are made of the just infrared glass of a slice biconvex, and its first (8) adopt aspheric surface with aberration correction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105079628A CN101963694A (en) | 2010-10-15 | 2010-10-15 | Long-wave heat difference eliminating infrared optical lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105079628A CN101963694A (en) | 2010-10-15 | 2010-10-15 | Long-wave heat difference eliminating infrared optical lens |
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| CN101963694A true CN101963694A (en) | 2011-02-02 |
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| CN2010105079628A Pending CN101963694A (en) | 2010-10-15 | 2010-10-15 | Long-wave heat difference eliminating infrared optical lens |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183836A (en) * | 2011-05-14 | 2011-09-14 | 苏州大学 | Infrared double-waveband athermalization optical lens |
| CN102681146A (en) * | 2011-02-22 | 2012-09-19 | 株式会社腾龙 | Infrared lens |
| CN103809271A (en) * | 2013-12-20 | 2014-05-21 | 河北汉光重工有限责任公司 | Large-aperture passive athermal infrared optical lens |
| CN104049343A (en) * | 2014-06-10 | 2014-09-17 | 西南技术物理研究所 | Compact type double-view-field medium wave infrared athermalization lens |
| CN106772949A (en) * | 2017-02-22 | 2017-05-31 | 苏州大学 | LONG WAVE INFRARED two waveband is looked in the distance image-forming objective lens in missile-borne athermal |
| CN107505689A (en) * | 2017-09-15 | 2017-12-22 | 江西联创电子有限公司 | Projection lens system |
| CN109782421A (en) * | 2017-11-14 | 2019-05-21 | 新巨科技股份有限公司 | The infrared Single wavelength of three-chip type projects lens set |
| US11137573B2 (en) | 2017-12-13 | 2021-10-05 | Zhejiang Sunny Optical Co., Ltd. | Projection lens assembly |
| CN114236762A (en) * | 2021-12-22 | 2022-03-25 | 中国电子科技集团公司第十一研究所 | Refrigeration type medium wave infrared athermalization lens and detection assembly |
| CN114935810A (en) * | 2022-05-06 | 2022-08-23 | 安徽光智科技有限公司 | Thermal difference eliminating infrared lens with focal length of 6.6mm |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201548753U (en) * | 2009-10-26 | 2010-08-11 | 中国科学院西安光学精密机械研究所 | Thermal infrared imaging system |
| CN201828703U (en) * | 2010-10-15 | 2011-05-11 | 北京波谱华光科技有限公司 | Long-wave athermal infrared optical lens |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102681146A (en) * | 2011-02-22 | 2012-09-19 | 株式会社腾龙 | Infrared lens |
| CN102183836B (en) * | 2011-05-14 | 2012-09-19 | 苏州大学 | Infrared double-waveband athermalization optical lens |
| CN102183836A (en) * | 2011-05-14 | 2011-09-14 | 苏州大学 | Infrared double-waveband athermalization optical lens |
| CN103809271A (en) * | 2013-12-20 | 2014-05-21 | 河北汉光重工有限责任公司 | Large-aperture passive athermal infrared optical lens |
| CN103809271B (en) * | 2013-12-20 | 2016-03-30 | 河北汉光重工有限责任公司 | The passive heat difference infrared optical lens that disappears of a kind of heavy caliber |
| CN104049343A (en) * | 2014-06-10 | 2014-09-17 | 西南技术物理研究所 | Compact type double-view-field medium wave infrared athermalization lens |
| CN106772949B (en) * | 2017-02-22 | 2021-04-13 | 苏州大学 | Missile-borne athermal medium-long wave infrared dual-band telescopic imaging objective lens |
| CN106772949A (en) * | 2017-02-22 | 2017-05-31 | 苏州大学 | LONG WAVE INFRARED two waveband is looked in the distance image-forming objective lens in missile-borne athermal |
| CN107505689A (en) * | 2017-09-15 | 2017-12-22 | 江西联创电子有限公司 | Projection lens system |
| CN107505689B (en) * | 2017-09-15 | 2023-08-04 | 江西联创电子有限公司 | Projection lens system |
| CN109782421A (en) * | 2017-11-14 | 2019-05-21 | 新巨科技股份有限公司 | The infrared Single wavelength of three-chip type projects lens set |
| CN109782421B (en) * | 2017-11-14 | 2021-01-08 | 新巨科技股份有限公司 | Three-piece infrared single-wavelength projection lens set |
| US11137573B2 (en) | 2017-12-13 | 2021-10-05 | Zhejiang Sunny Optical Co., Ltd. | Projection lens assembly |
| CN114236762A (en) * | 2021-12-22 | 2022-03-25 | 中国电子科技集团公司第十一研究所 | Refrigeration type medium wave infrared athermalization lens and detection assembly |
| CN114236762B (en) * | 2021-12-22 | 2024-03-19 | 中国电子科技集团公司第十一研究所 | Refrigeration type medium wave infrared athermalization lens and detection assembly |
| CN114935810A (en) * | 2022-05-06 | 2022-08-23 | 安徽光智科技有限公司 | Thermal difference eliminating infrared lens with focal length of 6.6mm |
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Application publication date: 20110202 |