CN104792413A - Laser power meter - Google Patents
Laser power meter Download PDFInfo
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- CN104792413A CN104792413A CN201510134398.2A CN201510134398A CN104792413A CN 104792413 A CN104792413 A CN 104792413A CN 201510134398 A CN201510134398 A CN 201510134398A CN 104792413 A CN104792413 A CN 104792413A
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- powermeter
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- WPYVAWXEWQSOGY-UHFFFAOYSA-N indium antimonide Chemical group [Sb]#[In] WPYVAWXEWQSOGY-UHFFFAOYSA-N 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- DGJPPCSCQOIWCP-UHFFFAOYSA-N cadmium mercury Chemical compound [Cd].[Hg] DGJPPCSCQOIWCP-UHFFFAOYSA-N 0.000 claims description 4
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- 229910000661 Mercury cadmium telluride Inorganic materials 0.000 description 4
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- 238000005259 measurement Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
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- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The invention provides a laser power meter. The laser power meter comprises a laser converter, an infrared receiver, an infrared detector and a power tester, wherein the laser converter is used for absorbing incidence laser, and converting the incidence laser into infrared rays to be emitted outwards; the infrared receiver is used for receiving the infrared rays and converging the infrared rays; the infrared detector is used for receiving the converged infrared rays and converting the converged infrared rays into an electric signal; the power tester is connected with the infrared detector and is used for receiving the electric signal, and calculating to obtain a power value of the incidence laser according to the electric signal. The laser power meter provided by the invention has the advantages of wide spectrum covering range and wide measurable power range, and also has the advantage of short responding time.
Description
Technical field
The present invention relates to laser power detection technology, particularly relate to a kind of laser powermeter.
Background technology
Along with the development of laser technology, laser instrument is more and more extensive in the application in the fields such as communication, medical treatment, industry manufacture.In the development of laser instrument, production and application process, the power of laser instrument to be measured and demarcation is absolutely necessary step.
Laser powermeter is exactly a kind of equipment measuring laser power, and different according to measuring principle, laser powermeter mainly comprises two classes, photoelectric type laser powermeter and calorimetric type laser powermeter.Wherein, photoelectric type laser powermeter utilizes the photoelectric effect of semiconductor to realize power measurement, when on the detection photosurface that laser is radiated at photoelectric type laser powermeter, photocurrent can be formed in loop, PN junction place wherein, the power of incident laser is larger, photocurrent is larger, by carrying out photocurrent measuring the power just learning incident laser.And calorimetric type laser powermeter utilizes light absorbent by the Conversion of Energy of laser for heat passes to one end of thermoelectric pile, the two ends of thermoelectric pile self are made to have temperature difference, and temperature difference is converted into electric potential difference, the power of incident laser just can be learnt by measuring electromotive force extent.
The advantage of photoelectric type laser powermeter is that the response time is very fast, but the coverage of its spectrum is narrower, and the power bracket that can survey is also narrower.And calorimetric type laser powermeter has, and spectral coverage is wide, power can survey the large advantage of scope, therefore, middle power and high-power laser are measured, and to multiple wavelength and the laser power that between each wavelength, span is larger carries out measurement of comparison time, usually all adopt calorimetric type laser powermeter, but the response time of this power meter is longer.All there is respective shortcoming in above-mentioned two kinds of laser powermeters, is difficult to the requirement meeting multiple laser instrument in measuring process.
Summary of the invention
The invention provides a kind of laser powermeter, both there is spectral coverage wide and can the advantage of power scale wide ranges, also there is response time short advantage.
The embodiment of the present invention provides a kind of laser powermeter, comprising:
Lasecon, for absorbing incident laser, and is converted to infrared ray by described incident laser and outwards launches;
Infrared remote receiver, for receiving described infrared ray, and assembles described infrared ray;
Infrared eye, for receiving the infrared ray after convergence, and is converted to electric signal by the infrared ray after described convergence; And,
Power tester, is connected with described infrared eye, for receiving described electric signal, and calculates the performance number of described incident laser according to described electric signal.
Laser powermeter as above, described infrared remote receiver is the infrared remote receiver of transmission-type.
Laser powermeter as above, described infrared remote receiver is reflective infrared remote receiver.
Laser powermeter as above, is provided with cooling device in described lasecon, and described cooling device is Conduction cooled device, air cooling equipment or water cooling plant.
Laser powermeter as above, the light-sensitive surface of described lasecon is provided with light-absorbing coating.
Laser powermeter as above, the light-sensitive surface of described lasecon is provided with resisting laser damage coating.
Laser powermeter as above, the surface of the infrared remote receiver of described transmission-type is provided with anti-reflection film.
Laser powermeter as above, the surface of described reflective infrared remote receiver is provided with reflectance coating, and described reflectance coating is aluminium film, copper film, silverskin or golden film.
Laser powermeter as above, described infrared eye is indium antimonide detector or mercury-cadmium tellurid detector.
Laser powermeter as above, also comprises the power display be connected with described power tester.
The laser powermeter that the embodiment of the present invention provides absorbs incident laser by adopting lasecon, and outside infrared radiation, then infrared remote receiver receiving infrared-ray is adopted, and assemble to infrared eye, be corresponding electric signal to make infrared eye by ultrared energy conversion, corresponding magnitude of power is converted electrical signals to again by power tester, this magnitude of power is corresponding with the power of incident laser, make this laser powermeter both have spectral coverage wide and can the advantage of power scale wide ranges, also there is response time short advantage.
Accompanying drawing explanation
The structural representation of the laser powermeter that Fig. 1 provides for the embodiment of the present invention one;
The structural representation of the laser powermeter that Fig. 2 provides for the embodiment of the present invention two.
Reference numeral:
1-laser instrument; 2-lasecon; The infrared remote receiver of 31-transmission-type;
4-infrared eye; 5-power tester; The infrared remote receiver that 32-is reflective.
Embodiment
Embodiment one
In view of two kinds of laser powermeters conventional in prior art all exist some shortcomings separately, the needs of multiple laser instrument independent measurement or multiple measurement can not be met in measuring process, the present embodiment provides a kind of laser powermeter, both there is spectral coverage wide and can the advantage of power scale wide ranges, also there is response time short advantage.
The laser powermeter that the present embodiment provides, comprising: lasecon, infrared remote receiver, infrared eye and power tester.Wherein, incident laser for absorbing incident laser, and is converted to infrared ray and outwards launches by lasecon.The infrared ray that infrared remote receiver sends for receiving lasecon, and infrared ray is assembled.Ultrared energy conversion after assembling for receiving the infrared ray after convergence, and is electric signal by infrared eye.Power tester, is connected with infrared eye, for receiving the electric signal that infrared eye sends, and calculates the performance number of incident laser according to this electric signal.
Concrete, the laser beam that incident laser sends for laser instrument to be measured.The incident laser radiation that laser instrument sends is on the light-sensitive surface (also namely: by light area) of lasecon, after the energy of lasecon absorbing laser, temperature by light area raises, and outside infrared radiation, the power of incident laser is larger, temperature by light area is higher, and namely the infrared energy of radiation is larger.Infrared remote receiver can receive the infrared ray of lasecon radiation, and is carried out assembling the search coverage to infrared eye by infrared ray, and the ultrared energy conversion detected is corresponding electric signal by infrared eye.Power tester is electrically connected with infrared eye, receives this electric signal, and this electric signal is converted to corresponding power data, can be learnt the watt level of incident laser by this power data.
The Cleaning Principle of such scheme is first ultrared energy by the power transfer of incident laser, the range effects of this transfer process not Stimulated Light spectrum, namely the laser in whole spectral range all can make lasecon generate heat, and energy is infrared radiation outwards, then the power of incident laser corresponds to corresponding ultrared energy, therefore, the non-constant width of spectral coverage of above-mentioned laser powermeter, and this laser powermeter is not also by the restriction of incident laser power scope.Secondly, ultrared energy conversion is also electric signal by above-mentioned laser powermeter, then calculates the power of incident laser according to this electric signal, and this process is compared with existing calorimetric type laser powermeter, the response process of the laser powermeter that the present embodiment provides is very fast, and the response time is shorter.
To sum up, the laser powermeter that the present embodiment provides absorbs incident laser by adopting lasecon, and outside infrared radiation, then infrared remote receiver receiving infrared-ray is adopted, and assemble to infrared eye, be corresponding electric signal to make infrared eye by ultrared energy conversion, corresponding magnitude of power is converted electrical signals to again by power tester, this magnitude of power is corresponding with the power of incident laser, make this laser powermeter both have spectral coverage wide and can the advantage of power scale wide ranges, also there is response time short advantage.
For each device in above-mentioned laser powermeter, those skilled in the art can design multiple implementation, and the present embodiment provides a kind of concrete implementation.
The structural representation of the laser powermeter that Fig. 1 provides for the embodiment of the present invention one.As shown in Figure 1, this laser powermeter detects the laser that laser instrument 1 to be measured is launched, and this laser powermeter can comprise: the infrared remote receiver 31 of lasecon 2, transmission-type, infrared eye 4 and power tester 5.
Wherein, lasecon 2 also can be called test target, as the term suggests be just used to receive the incident laser that sends of laser instrument 1.The light-sensitive surface of lasecon 2 receives incident laser, causes the portion temperature by incident laser radiation in lasecon 2 to raise, and outside infrared radiation.The power of incident laser is larger, and the temperature of lasecon 2 is higher, stronger to extraradial infrared energy.Lasecon 2 specifically can adopt the metal sheet metals such as aluminium common in prior art, copper, to realize the function of raised temperature after being subject to laser irradiation.
The function of the infrared remote receiver 31 of transmission-type is the infrared ray that collection lasecon 2 is launched, and line convergence of going forward side by side, specifically can adopt convex lens.The infrared ray that lasecon 2 is launched is assembled through after convex lens.The infrared remote receiver 31 of transmission-type preferably adopts the dielectric material higher to infrared radiation transmissivity to make, in order to improve transmitance further, and can also at the anti-reflection film of the plated surface of the infrared remote receiver 31 of transmission-type for infrared radiation.
According to the infrared remote receiver 31 of convex lens as transmission-type, and convex lens are short focal length lens, lasecon 2 is greater than the focal length of convex lens with the distance of convex lens, then the photosurface of infrared eye 4 can be positioned at the focus place of convex lens, accepts the infrared ray after assembling.The function of infrared eye 4 is corresponding electric signal by the ultrared energy conversion received, specifically can adopt device conventional in prior art, such as indium antimonide detector, mercury-cadmium tellurid detector etc., wherein, the chemical formula of indium antimonide is InSb, and the chemical formula of mercury cadmium telluride is HgCdTe.
Power tester 5 is electrically connected with infrared eye 4, receives the electric signal that infrared eye 4 sends.The function of power tester 5 is calculated by this electric signal, and obtain corresponding magnitude of power, this magnitude of power is corresponding with the power of incident laser.Power tester 5 also can adopt the testing apparatus that can obtain magnitude of power according to analog electric signal conventional in prior art.
The model of above-mentioned each device and the layout of each device all can be set by technician, such as, according to the position of the position of the infrared remote receiver 31 of ultrared radiation scope determination transmission-type, focal length and infrared eye 4.
Technique scheme absorbs incident laser by adopting lasecon, and outside infrared radiation, then the infrared remote receiver receiving infrared-ray of transmission-type is adopted, and assemble to infrared eye, be corresponding electric signal to make infrared eye by ultrared energy conversion, corresponding magnitude of power is converted electrical signals to again by power tester, this magnitude of power is corresponding with the power of incident laser, make this laser powermeter both have spectral coverage wide and can the advantage of power scale wide ranges, also there is response time short advantage.
Further, the light-absorbing coating of laser absorption rate can be increased in the light-sensitive surface coating of lasecon 2, to improve the receptivity to laser.
In addition, consider that high-power laser is radiated on lasecon 2, likely damage is caused to lasecon 2, in the light-sensitive surface coating resisting laser damage coating of lasecon 2, to avoid lasecon 2 impaired, its serviceable life can also be improved.
Above-mentioned laser powermeter can also comprise power display, is connected with power tester 5, shows with the magnitude of power obtained by power tester 5.Or power display can be integrated in one with power tester 5, and namely namely power tester 5 has the function of rated output numerical value, has both again the function of display magnitude of power.
On the basis of technique scheme, the light-sensitive surface of lasecon 2, by incident laser radiation, makes the temperature by light area raise, and, also can raise with the temperature of the part of closing on by light area in lasecon 2.In order to avoid when laser power is larger, too high and damage with the temperature of closing on by light area partly in lasecon 2, cooling device can be set in lasecon 2, with the temperature reduced with close on part by light area, avoid damage.This cooling device can adopt the type of cooling of Conduction cooled mode, air-cooled, water-cooled or other form.
Wherein, a kind of form of Conduction cooled mode adopts the good conductive structure of heat conductivility and lasecon 2 to fit, make the heat of lasecon 2 by conductive structure fast and surrounding air carry out exchange heat, realize Conduction cooled, increase the contact area with air, improve cooling effectiveness.Another kind of form is by heat sink mode, adopt own temperature not with the external world pass to its thermal change and the equipment that changes as with by the adjacent part in light area.
Air-cooled mode, the side that can deviate from by light area at lasecon 2 arranges fan, accelerates the flowing velocity of surrounding air, to improve cooling effectiveness.
The mode of water-cooled, can arrange cooling water channel, be connected with the recirculated water of lower temperature in cooling water channel in lasecon 2, can take away the heat of lasecon 2 fast, also can accelerating cooling, improves cooling effectiveness.
Embodiment two
Above-described embodiment one provides a kind of laser powermeter adopting the infrared remote receiver 31 of transmission-type to form, with embodiment one unlike, infrared remote receiver in the laser powermeter that the present embodiment provides adopts reflective.The structural representation of the laser powermeter that Fig. 2 provides for the embodiment of the present invention two.As shown in Figure 2, this laser powermeter detects the laser that laser instrument 1 to be measured is launched, and this laser powermeter can comprise: lasecon 2, reflective infrared remote receiver 32, infrared eye 4 and power tester 5.
Wherein, lasecon 2 also can be called test target, as the term suggests be just used to receive the incident laser that sends of laser instrument 1.The light-sensitive surface of lasecon 2 receives incident laser, causes the portion temperature by incident laser radiation in lasecon 2 to raise, and outside infrared radiation.The power of incident laser is larger, and the temperature of lasecon 2 is higher, stronger to extraradial infrared energy.Lasecon 2 specifically can adopt some materials common in prior art to make, metal sheet metal such as such as aluminium, copper etc., to realize the function of raised temperature after being subject to laser irradiation.
The function of reflective infrared remote receiver 32 is infrared rays that collection lasecon 2 is launched, and line convergence of going forward side by side, specifically can adopt concave mirror.The infrared radiation that lasecon 2 is launched is reflected to the surface of concave mirror, then assembles.
Reflective infrared remote receiver 32 preferably adopts the dielectric material higher to infrared radiation reflectivity to make, in order to improve reflectivity further, the reflectance coating for infrared radiation can also be coated with, such as aluminium film, copper film, silverskin or golden film etc. on the surface of reflective infrared remote receiver 32.
According to concave mirror as reflective infrared remote receiver 32, then the photosurface of infrared eye 4 can be positioned at the ultrared convergent point place that concave mirror is launched lasecon 2, receives the infrared ray after assembling.The function of infrared eye 4 is corresponding electric signal by the ultrared energy conversion received, specifically can adopt device conventional in prior art, such as indium antimonide detector, mercury-cadmium tellurid detector etc., wherein, the chemical formula of indium antimonide is InSb, and the chemical formula of mercury cadmium telluride is HgCdTe.
Power tester 5 is electrically connected with infrared eye 4, receives the electric signal that infrared eye 4 sends.The function of power tester 5 is calculated by this electric signal, and obtain corresponding magnitude of power, this magnitude of power is corresponding with the power of incident laser.Power tester 5 also can adopt the testing apparatus that can obtain magnitude of power according to analog electric signal conventional in prior art.
The model of above-mentioned each device and the layout of each device all can be set by technician, such as, determine the position of the position of reflective infrared remote receiver 32, focal length and infrared eye 4 according to ultrared radiation scope.
Technique scheme absorbs incident laser by adopting lasecon, and outside infrared radiation, then reflective infrared remote receiver receiving infrared-ray is adopted, and assemble to infrared eye, be corresponding electric signal to make infrared eye by ultrared energy conversion, corresponding magnitude of power is converted electrical signals to again by power tester, this magnitude of power is corresponding with the power of incident laser, make this laser powermeter both have spectral coverage wide and can the advantage of power scale wide ranges, also there is response time short advantage.
Further, the light-absorbing coating of laser absorption rate can be increased in the light-sensitive surface coating of lasecon 2, to improve the receptivity to laser.
In addition, consider that high-power laser is radiated on lasecon 2, likely damage is caused to lasecon 2, in the light-sensitive surface coating resisting laser damage coating of lasecon 2, to avoid lasecon 2 impaired, its serviceable life can also be improved.
Above-mentioned laser powermeter can also comprise power display, is connected with power tester 5, shows with the magnitude of power obtained by power tester 5.Or power display can be integrated in one with power tester 5, and namely namely power tester 5 has the function of rated output numerical value, has both again the function of display magnitude of power.
On the basis of technique scheme, the light-sensitive surface of lasecon 2, by incident laser radiation, makes the temperature by light area raise, and, also can raise with the temperature of the part of closing on by light area in lasecon 2.In order to avoid when laser power is larger, too high and damage with the temperature of closing on by light area partly in lasecon 2, cooling device can be set in lasecon 2, with the temperature reduced with close on part by light area, avoid damage.This cooling device can adopt the type of cooling of Conduction cooled mode, air-cooled, water-cooled or other form.
Wherein, a kind of form of Conduction cooled mode adopts the good conductive structure of heat conductivility and lasecon 2 to fit, make the heat of lasecon 2 by conductive structure fast and surrounding air carry out exchange heat, realize Conduction cooled, increase the contact area with air, improve cooling effectiveness.Another kind of form is by heat sink mode, adopt own temperature not with the external world pass to its thermal change and the equipment that changes as with by the adjacent part in light area.
Air-cooled mode, the side that can deviate from by light area at lasecon 2 arranges fan, accelerates the flowing velocity of surrounding air, to improve cooling effectiveness.
The mode of water-cooled, can arrange cooling water channel, be connected with the recirculated water of lower temperature in cooling water channel in lasecon 2, can take away the heat of lasecon 2 fast, also can accelerating cooling, improves cooling effectiveness.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a laser powermeter, is characterized in that, comprising:
Lasecon, for absorbing incident laser, and is converted to infrared ray by described incident laser and outwards launches;
Infrared remote receiver, for receiving described infrared ray, and assembles described infrared ray;
Infrared eye, for receiving the infrared ray after convergence, and is converted to electric signal by the infrared ray after described convergence; And,
Power tester, is connected with described infrared eye, for receiving described electric signal, and calculates the performance number of described incident laser according to described electric signal.
2. laser powermeter according to claim 1, is characterized in that, described infrared remote receiver is the infrared remote receiver of transmission-type.
3. laser powermeter according to claim 1, is characterized in that, described infrared remote receiver is reflective infrared remote receiver.
4. the laser powermeter according to Claims 2 or 3, is characterized in that, is provided with cooling device in described lasecon, and described cooling device is Conduction cooled device, air cooling equipment or water cooling plant.
5. laser powermeter according to claim 4, is characterized in that, the light-sensitive surface of described lasecon is provided with light-absorbing coating.
6. laser powermeter according to claim 4, is characterized in that, the light-sensitive surface of described lasecon is provided with resisting laser damage coating.
7. laser powermeter according to claim 2, is characterized in that, the surface of the infrared remote receiver of described transmission-type is provided with anti-reflection film.
8. laser powermeter according to claim 3, is characterized in that, the surface of described reflective infrared remote receiver is provided with reflectance coating, and described reflectance coating is aluminium film, copper film, silverskin or golden film.
9. laser powermeter according to claim 1, is characterized in that, described infrared eye is indium antimonide detector or mercury-cadmium tellurid detector.
10. laser powermeter according to claim 1, is characterized in that, also comprises the power display be connected with described power tester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510134398.2A CN104792413A (en) | 2015-03-25 | 2015-03-25 | Laser power meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510134398.2A CN104792413A (en) | 2015-03-25 | 2015-03-25 | Laser power meter |
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| CN104792413A true CN104792413A (en) | 2015-07-22 |
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| CN201510134398.2A Pending CN104792413A (en) | 2015-03-25 | 2015-03-25 | Laser power meter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107271035A (en) * | 2017-08-08 | 2017-10-20 | 温州泛波激光有限公司 | A kind of power detection device of laser |
| CN111624207A (en) * | 2020-05-26 | 2020-09-04 | 国网天津市电力公司电力科学研究院 | System and method for measuring dust covering degree of photovoltaic panel of photovoltaic power station by using double unmanned aerial vehicles |
| CN112310786A (en) * | 2020-09-21 | 2021-02-02 | 上海航天控制技术研究所 | Composite signal source and method for generating infrared and microwave composite signals |
| CN112326045A (en) * | 2020-10-30 | 2021-02-05 | 北京理工大学 | Infrared scene conversion chip with double-scale superstructure |
| CN114518342A (en) * | 2022-02-21 | 2022-05-20 | 哈尔滨工业大学 | Device and method for detecting transmittance of film polaroid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107271035A (en) * | 2017-08-08 | 2017-10-20 | 温州泛波激光有限公司 | A kind of power detection device of laser |
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| CN111624207B (en) * | 2020-05-26 | 2024-07-23 | 国网天津市电力公司电力科学研究院 | System and method for measuring ash coverage degree of photovoltaic panel of photovoltaic power station by double unmanned aerial vehicles |
| CN112310786A (en) * | 2020-09-21 | 2021-02-02 | 上海航天控制技术研究所 | Composite signal source and method for generating infrared and microwave composite signals |
| CN112326045A (en) * | 2020-10-30 | 2021-02-05 | 北京理工大学 | Infrared scene conversion chip with double-scale superstructure |
| CN114518342A (en) * | 2022-02-21 | 2022-05-20 | 哈尔滨工业大学 | Device and method for detecting transmittance of film polaroid |
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Application publication date: 20150722 |