CN103256985A - Transmission-type infrared temperature difference standard source applied to wide-temperature-range environment - Google Patents
Transmission-type infrared temperature difference standard source applied to wide-temperature-range environment Download PDFInfo
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- CN103256985A CN103256985A CN2013100626044A CN201310062604A CN103256985A CN 103256985 A CN103256985 A CN 103256985A CN 2013100626044 A CN2013100626044 A CN 2013100626044A CN 201310062604 A CN201310062604 A CN 201310062604A CN 103256985 A CN103256985 A CN 103256985A
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Abstract
The invention relates to the field of infrared target characteristic simulation, in particular to a transmission-type infrared temperature difference standard source applied to a wide-temperature-range environment. A first black body provides target radiation energy; a second black body provides environment radiation energy; a through hole is formed in the center of an infrared target, and a reflective face is arranged on the periphery of the infrared target; the target radiation energy at the central part of the first black body passes through the through hole of the infrared target and a dichroic mirror, is converged by an athermalization transmission-type infrared optical system to be output. The environment radiation energy provided by the second black body is reflected to the reflective face of the infrared target through the dichroic mirror, and the reflected environment radiation energy can transmits through the dichroic mirror and is output through the athermalization transmission-type infrared optical system. By means of the radiation source system, the transmission-type infrared temperature difference standard source adopts double black bodies, and removes influence of working environment temperature variation in the whole system.
Description
Technical field
The present invention relates to infrared target characteristic Simulation field, is a kind of infrared temperature difference standard source of transmission-type that adapts to the wide temperature range environment concretely.
Background technology
Any material that is higher than absolute zero (273 ℃) of occurring in nature himself all has certain infrared energy, and forms energy field around it, and the thermal infrared imager of being made up of the infrared light sensing device comes sensing temperature usually.
Infrared temperature difference standard source design of the prior art is comparatively simple, and feasibility is not high.Optical system designs without no thermalization, radiation source system only adopts a single black matrix simultaneously, cause arranging under the identical situation in the temperature difference, the device actual radiation temperature difference can change with variation of ambient temperature, and namely standard irradiation targets characteristic can change under different environment temperatures.This method makes the volume of total system and complicacy become big, the reliability decrease of total system.Consider that the infrared target characteristic can change under different environment temperatures, if adopt the common reflective infrared collimating optical system of Cassegrain, can satisfy no thermalization requirement, but the system visual field is less, can not satisfy the test request of big visual field, if adopt common transmission-type collimating optical system, though enlarged the system visual field, but because infrared lens material varies with temperature refractive index bigger variation can take place, can not be applied under the wide temperature range environment, the reliability of total system is lower.
What a kind of collimating optical system of infrared temperature difference standard source of the prior art adopted is the optical system design of off-axis reflection, shortcomings such as this design proposal has the off-axis parabolic mirror difficulty of processing big, and the total system device volume is big, field angle is little, not portable.
Summary of the invention
Owing to infrared lens material varies with temperature refractive index bigger variation can take place in order to solve in the prior art, can not be applied under the wide temperature range environment, the problem that the reliability of total system is lower, a kind of infrared temperature difference standard source of transmission-type that adapts to the wide temperature range environment has been proposed, employing environment black matrix and target black matrix obtain the temperature difference between environment and the target, thereby can eliminate the influence of operating ambient temperature variation in total system.
The invention provides a kind of infrared temperature difference standard source of transmission-type that adapts to the wide temperature range environment, comprising:
First black matrix, second black matrix, infrared target, half-reflecting half mirror, no thermalization transmission-type infrared optical system;
Described first black matrix provides the target emanation energy;
Described second black matrix provides the environmental radiation energy;
Described infrared target center has through hole, and periphery is reflecting surface;
The target emanation energy of the described first black matrix core is by through hole and the described half-reflecting half mirror of described infrared target, and the described no thermalization transmission-type infrared optical system of process is assembled back output;
The environmental radiation energy that described second black matrix provides reflexes on the reflecting surface of described infrared target via described half-reflecting half mirror, the environmental radiation energy of described reflection is by described half-reflecting half mirror, and the described no thermalization transmission-type infrared optical system of process is assembled back output.
According to an a kind of further aspect that adapts to the infrared temperature difference standard source of transmission-type of wide temperature range environment of the present invention, described infrared target center is hollow out circular feature target type, the target emanation energy is transmitted in the main optical path by hollow out circular feature target type, remainder is gold-plated film reflecting surface, and the environmental radiation energy is reflexed in the main optical path.
According to a kind of another further aspect that adapts to the infrared temperature difference standard source of transmission-type of wide temperature range environment of the present invention, the reflecting surface of described infrared target polishing back plating high reflectance gold film, its effective reflectivity is 0.98; Described infrared target also adopts polishing facing to the one side of first black matrix.
According to a kind of another further aspect that adapts to the infrared temperature difference standard source of transmission-type of wide temperature range environment of the present invention, warm extend blackbody during described first black matrix and described second black matrix all adopt, swept area 60mm * the 60mm of the extend blackbody of described first black matrix and described second black matrix, radiant panel is selected copper plate for use.
According to a kind of another further aspect that adapts to the infrared temperature difference standard source of transmission-type of wide temperature range environment of the present invention, described half-reflecting half mirror adopts the infrared film of plating high reflectance, and lens materials is selected Ge, and thickness is 3.5mm-7.5mm.
According to a kind of another further aspect that adapts to the infrared temperature difference standard source of transmission-type of wide temperature range environment of the present invention, the distance between described half-reflecting half mirror and the described no thermalization transmission-type infrared optical system is 50mm-100mm.
The present invention adopts two black matrixes by radiation source system, eliminates the influence of operating ambient temperature variation in total system.
Description of drawings
Read the detailed description to embodiment in conjunction with the following drawings, above-mentioned feature and advantage of the present invention, and extra feature and advantage will be more readily apparent from.
Fig. 1 has provided a kind of according to one embodiment of present invention structural representation that adapts to the infrared temperature difference standard source of transmission-type of wide temperature range environment;
Figure 2 shows that the structural representation of infrared target among the present invention;
Figure 3 shows that the present invention does not have the optical design figure of thermalization transmission-type infrared optical system;
Figure 4 shows that the embodiment of the invention is no thermalization transmission-type infrared optical system optical transfer function figure under 20 ℃ the condition in environment temperature;
Figure 5 shows that the embodiment of the invention is no thermalization transmission-type infrared optical system optical transfer function figure under-20 ℃ the condition in environment temperature;
Figure 6 shows that the embodiment of the invention is no thermalization transmission-type infrared optical system optical transfer function figure under 40 ℃ the condition in environment temperature.
Embodiment
Following description can make any those skilled in the art utilize the present invention.The descriptor that provides in specific embodiment and the application only is example.The various extensions of embodiment as described herein and combination are apparent for those skilled in the art, and under the situation that does not break away from the spirit and scope of the invention, the rule of the present invention's definition can be applied in other embodiment and the application.Therefore, the embodiment shown in the present invention is not only limited to, the maximum magnitude consistent with principle shown in this paper and feature contained in the present invention.
Fig. 1 has provided a kind of according to one embodiment of present invention structural representation that adapts to the infrared temperature difference standard source of transmission-type of wide temperature range environment.
Comprise first black matrix, 101, the second black matrixes 102, infrared target 103, half-reflecting half mirror 104, no thermalization transmission-type infrared optical system 105.
Described first black matrix 101 provides the target emanation energy;
Described second black matrix 102 provides the environmental radiation energy;
Described infrared target 103 centers have through hole, and periphery is reflecting surface;
The target emanation energy of described first black matrix, 101 cores is by described infrared target 103 and described half-reflecting half mirror 104, and the described no thermalization transmission-type infrared optical system 105 of process is assembled back output;
The environmental radiation energy that described second black matrix 102 provides reflexes on the reflecting surface of described infrared target 103 via described half-reflecting half mirror 104, the environmental radiation energy of described reflection is by described half-reflecting half mirror 104, and the described no thermalization transmission-type infrared optical system 105 of process is assembled back output.
Wherein, the operating ambient temperature range of the infrared collimating optical system of no thermalization is designed to-20 ℃-40 ℃.For the long wave band infrared optical system, the refractive index of used optical material itself varies with temperature coefficient d n/dt, optics thermal expansivity X
fBe the inherent characteristic of material self, can't eliminate, so the variation of environment temperature will inevitably cause the thermal effect of optical system.At present the domestic no thermalization designing technique that adopts mainly contains that the active no thermalization technology of electronics, mechanical passive type do not have the thermalization technology, the PASSIVE OPTICAL formula does not have thermalization technology etc.The active no thermalization technology of electronics is eliminated the thermal effect works very well, but since introduced thermometric, feedback, driving circuit make system complex, weight is big, reliability is not high.The machinery passive type does not have the thermalization technology and uses single high expansivity material or memorial alloy to realize not having the thermalization compensation, and reliability height, system constitute simple, and shortcoming is that volume is big, and is very heavy.The PASSIVE OPTICAL formula does not have the thermalization technology by the expansion coefficient of dn/dt, expansion coefficient and the optical-mechanical material of matching optics material, the temperature out of focus that various influence factors are produced moves cancels each other/compensates, and makes the image quality of optical system remain the acceptable level in operating temperature range.This mode does not need to introduce extra device, but in the process of optical system design, and the coupling by material reaches the purpose of eliminating thermal effect, no matter can both not reach request for utilization on reliability still has the effect of thermalization.More than do not have thermalization transmission-type infrared optical system and all can be used for embodiments of the invention, wherein not having the thermalization technology with the PASSIVE OPTICAL formula is most preferred embodiment.
As further embodiment, described no thermalization transmission-type infrared optical system 105 adopts the infra-red material of high permeability, and lens material is selected Silicon, Ge and ZnS, and structural member is chosen as aluminium.Being illustrated in figure 3 as the present invention does not have the optical design figure of thermalization transmission-type infrared optical system, and wherein different line segment represents the light of different visual fields.
As one embodiment of the present of invention, described infrared target 103 centers are hollow out circular feature target type, the target emanation energy is transmitted in the main optical path by hollow out circular feature target type, and remainder is gold-plated film reflecting surface, and the environmental radiation energy is reflexed in the main optical path.
As further embodiment, described infrared target 103 material selection copper plates, be illustrated in figure 2 as the structural representation of infrared target 103 among the present invention, comprise the through hole 201 that is positioned at the infrared target center, reflecting surface 202 is finished the processing of feature target type by the line cutting, the reflecting surface 202 polishing back plating high reflectance gold films of infrared target, its effective reflectivity can reach 0.98, to reflect the environmental radiation energy of second black matrix, forms the environmental radiation characteristic.The one side that infrared target faces first black matrix 101 also adopts polishing, prevents by 101 heating of first black matrix.
As one embodiment of the present of invention, warm extend blackbody during described first black matrix 101 and described second black matrix 102 all adopt, swept area 60mm * the 60mm of the extend blackbody of described first black matrix 101 and described second black matrix 102, radiant panel is selected copper plate for use, this material proves not only thermal capacitance height, and material self emissivity height through test of many times, behind spray high emissivity lacquer, the slab construction emissivity can reach more than 0.90.
As one embodiment of the present of invention, described half-reflecting half mirror 104 adopts the infrared film of plating high reflectance, has very high infrared reflectivity, lens materials is selected Ge, thickness is 3.5mm-7.5mm, its environmental radiation energy that mainly act as second black matrix 102 reflexes to infrared target 103, and the black matrix 101 of winning is passed through by the target emanation energy of feature target type and the environmental radiation energy that reflects through infrared target 103, and above-mentioned target emanation energy and environmental energy are delivered to described no thermalization transmission-type infrared optical system 105.So be understandable that, the material of described half-reflecting half mirror 104, the position that is arranged in device and spatial attitude etc. all can be regulated as required, and embodiments of the invention should not be construed the restriction to this half-reflecting half mirror 104.
As one embodiment of the present of invention, the distance between described half-reflecting half mirror 104 and the described no thermalization transmission-type infrared optical system 105 is 50mm-100mm.
Continue the above embodiments, described target emanation energy is by the center of infrared target 103, and process half-reflecting half mirror 104 and the first-class infrared thermometer device of no thermalization transmission-type infrared optical system 105 arrival guidings, formation for example is the image of the target emanation of circle; Described environmental radiation energy arrives infrared target 103 by the reflection of half-reflecting half mirror 104, the environmental radiation energy around the target emanation energy of reflecting to form through the reflecting surface of infrared target 103, again by half-reflecting half mirror 104, described no thermalization transmission-type infrared optical system 105 is assembled collimation with target emanation energy and environmental radiation energy, the final first-class infrared thermometer device of guiding that arrives, the image of circular environmental radiation around target emanation.By controlling first black matrix 101 and 102 intensifications of second black matrix or cooling, the radiation temperature difference of standard can be provided, thereby can calibrate the first-class infrared thermometer device of described guiding.
The present invention is applied in 20 ℃ ,-20 ℃ and 40 ℃ no thermalization transmission-type infrared optical system optical transfer function figure down as Fig. 4-Figure 6 shows that, wherein, Fig. 4 is under environment temperature is 20 ℃ condition, the situation of no thermalization transmission-type infrared optical system optical transfer function, what the MTF curve map showed is that optical system is to the faithful reappearance situation of contrast, the longitudinal axis represent contrast quality the quality of picture element amount, transverse axis representation space resolution, curve among Fig. 4 more contrast performance near 1 (maximal value) optical system is just more good, and just image quality is more good.The curve of the T correspondence in the described accompanying drawing refers to the meridian optical transfer function of this angle of half field-of view, the curve of S correspondence refers to the sagitta of arc optical transfer function of this angle of half field-of view, and wherein two groups of data of each T and S back represent the value of directions X and Y-direction in the half field-of-view respectively.Fig. 5 be in environment temperature under-20 ℃ the condition, the situation of no thermalization transmission-type infrared optical system optical transfer function, other identical with Fig. 4.Fig. 6 is under environment temperature is 40 ℃ condition, the situation of no thermalization transmission-type infrared optical system optical transfer function, other identical with Fig. 4.
The MTF (optical transfer function) of each visual field (every line segment in Fig. 4-Fig. 6 all represents different visual fields) is very high at each temperature as can be known from Fig. 4-Fig. 6, illustrate that this optical system is all very even from-20 ℃-40 ℃ image quality from the center to the visual field, edge, namely entire image is all very clear.
Above-mentioned accompanying drawing is intended to illustrate the beneficial effect of the present patent application, and the great and mark of the symbol among the figure is the usage of this area.
Pass through above-described embodiment, adopt transmission-type not have the distance between thermalization infrared optics method for designing, the two black matrixes (first black matrix and second black matrix) of radiation source system employing, radiation source system and the collimating optical system, material, radius, distance and the thickness parameter of reasonable matched lenses, make the total system device in-20 ℃ of-40 ℃ of operating ambient temperature ranges, realize passive no thermalization, save the thermometric focus adjusting mechanism, improved system reliability; Adopt two black matrixes by radiation source system in addition, eliminate the influence of operating ambient temperature variation in total system; Standard source operating ambient temperature range-20 of the present invention ℃-40 ℃, temperature controlling range: 20 ℃-80 ℃, temperature control precision :≤0.2 ℃, focal length: 〉=400mm, visual field 〉=3.0 °, service band 8 μ m-14 μ m.
The embodiment of the invention has adopted the transmission-type infrared optical system, to adapt to the measurement requirement of big visual field, does not have the thermalization design simultaneously, and optical property remains unchanged substantially in the temperature range of design.Radiation source system adopts two black matrix forms, can control the radiation temperature of target and background simultaneously.After will not having thermalization optical system and two blackbody radiation source system in combination, can become the infrared target origin system of a standard, standard infrared target source can be carried out the calibration of radiation temperature difference parameters in the laboratory, makes the radiation temperature signal value of the exportable standard of device.This method for designing is advanced, can satisfy test request, has promoted the reliability of total system.
Above-described embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is the specific embodiment of the present invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. infrared temperature difference standard source of transmission-type that adapts to the wide temperature range environment is characterized in that comprising:
First black matrix, second black matrix, infrared target, half-reflecting half mirror, no thermalization transmission-type infrared optical system;
Described first black matrix provides the target emanation energy;
Described second black matrix provides the environmental radiation energy;
Described infrared target center has through hole, and periphery is reflecting surface;
The target emanation energy of the described first black matrix core is by through hole and the described half-reflecting half mirror of described infrared target, and the described no thermalization transmission-type infrared optical system of process is assembled back output;
The environmental radiation energy that described second black matrix provides reflexes on the reflecting surface of described infrared target via described half-reflecting half mirror, the environmental radiation energy of described reflection is by described half-reflecting half mirror, and the described no thermalization transmission-type infrared optical system of process is assembled back output.
2. a kind of infrared temperature difference standard source of transmission-type that adapts to the wide temperature range environment according to claim 1, it is characterized in that, described infrared target center is hollow out circular feature target type, the target emanation energy is transmitted in the main optical path by hollow out circular feature target type, remainder is gold-plated film reflecting surface, and the environmental radiation energy is reflexed in the main optical path.
3. a kind of infrared temperature difference standard source of transmission-type that adapts to the wide temperature range environment according to claim 2 is characterized in that, the reflecting surface polishing back plating high reflectance gold film of described infrared target, and its effective reflectivity is 0.98; Described infrared target also adopts polishing facing to the one side of first black matrix.
4. a kind of infrared temperature difference standard source of transmission-type that adapts to the wide temperature range environment according to claim 1, it is characterized in that, warm extend blackbody during described first black matrix and described second black matrix all adopt, swept area 60mm * the 60mm of the extend blackbody of described first black matrix and described second black matrix, radiant panel is selected copper plate for use.
5. a kind of infrared temperature difference standard source of transmission-type that adapts to the wide temperature range environment according to claim 1 is characterized in that, described half-reflecting half mirror adopts the infrared film of plating high reflectance, and lens materials is selected Ge, and thickness is 3.5mm-7.5mm.
6. a kind of infrared temperature difference standard source of transmission-type that adapts to the wide temperature range environment according to claim 1 is characterized in that, the distance between described half-reflecting half mirror and the described no thermalization transmission-type infrared optical system is 50mm-100mm.
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Cited By (9)
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| CN104181614A (en) * | 2014-08-13 | 2014-12-03 | 中国人民解放军理工大学 | Outdoor real-time calibration method and device based on double external black bodies and applied to foundation infrared ceilometer |
| CN105784127A (en) * | 2016-05-05 | 2016-07-20 | 合肥芯福传感器技术有限公司 | Combined-type standard testing source and method for infrared sensor |
| CN107124600A (en) * | 2017-04-26 | 2017-09-01 | 北京环境特性研究所 | One kind is based on DMD infrared projections equipment and its quantitative output intent |
| CN110017900A (en) * | 2018-01-09 | 2019-07-16 | 北京振兴计量测试研究所 | High/low temperature infrared imaging system detection device |
| CN110997294A (en) * | 2017-06-14 | 2020-04-10 | 菲力尔商业***公司 | Lens system and manufacturing method |
| CN113532663A (en) * | 2021-06-28 | 2021-10-22 | 深圳市景阳科技股份有限公司 | Method, device and equipment for acquiring responsivity of infrared detector and storage medium |
| CN113639969A (en) * | 2021-08-19 | 2021-11-12 | 中国人民解放军92493部队计量测试研究所 | High-precision temperature difference type infrared collimator |
| CN114383738A (en) * | 2020-10-22 | 2022-04-22 | 中国兵器工业试验测试研究院 | Device for calibrating characteristics of external field target and optical system |
| CN116734744A (en) * | 2023-06-21 | 2023-09-12 | 南京细柳智能科技有限公司 | Online camera displacement light measurement method and system based on infrared target |
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| CN104181614B (en) * | 2014-08-13 | 2016-08-24 | 中国人民解放军理工大学 | A kind of ground infrared cloud detection instrument field based on external pair of black matrix real-time calibration method and device |
| CN104181614A (en) * | 2014-08-13 | 2014-12-03 | 中国人民解放军理工大学 | Outdoor real-time calibration method and device based on double external black bodies and applied to foundation infrared ceilometer |
| CN105784127B (en) * | 2016-05-05 | 2019-11-12 | 合肥芯福传感器技术有限公司 | A kind of infrared sensor combined type standard testing source and test method |
| CN105784127A (en) * | 2016-05-05 | 2016-07-20 | 合肥芯福传感器技术有限公司 | Combined-type standard testing source and method for infrared sensor |
| CN107124600A (en) * | 2017-04-26 | 2017-09-01 | 北京环境特性研究所 | One kind is based on DMD infrared projections equipment and its quantitative output intent |
| CN110997294A (en) * | 2017-06-14 | 2020-04-10 | 菲力尔商业***公司 | Lens system and manufacturing method |
| US11415783B2 (en) | 2017-06-14 | 2022-08-16 | Teledyne Flir Commercial Systems, Inc. | Lens systems and methods of manufacture |
| CN110017900A (en) * | 2018-01-09 | 2019-07-16 | 北京振兴计量测试研究所 | High/low temperature infrared imaging system detection device |
| CN110017900B (en) * | 2018-01-09 | 2021-01-08 | 北京振兴计量测试研究所 | High-low temperature infrared imaging system detection device |
| CN114383738A (en) * | 2020-10-22 | 2022-04-22 | 中国兵器工业试验测试研究院 | Device for calibrating characteristics of external field target and optical system |
| CN113532663A (en) * | 2021-06-28 | 2021-10-22 | 深圳市景阳科技股份有限公司 | Method, device and equipment for acquiring responsivity of infrared detector and storage medium |
| CN113639969A (en) * | 2021-08-19 | 2021-11-12 | 中国人民解放军92493部队计量测试研究所 | High-precision temperature difference type infrared collimator |
| CN113639969B (en) * | 2021-08-19 | 2023-12-05 | 中国人民解放军92493部队计量测试研究所 | High-precision temperature difference type infrared parallel light pipe |
| CN116734744A (en) * | 2023-06-21 | 2023-09-12 | 南京细柳智能科技有限公司 | Online camera displacement light measurement method and system based on infrared target |
| CN116734744B (en) * | 2023-06-21 | 2024-04-05 | 南京细柳智能科技有限公司 | Online camera displacement light measurement method and system based on infrared target |
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Application publication date: 20130821 |