CN212483926U - Broadband light source device for testing photoelectric detector - Google Patents
Broadband light source device for testing photoelectric detector Download PDFInfo
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- CN212483926U CN212483926U CN202021276370.5U CN202021276370U CN212483926U CN 212483926 U CN212483926 U CN 212483926U CN 202021276370 U CN202021276370 U CN 202021276370U CN 212483926 U CN212483926 U CN 212483926U
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Abstract
The utility model relates to the technical field of photoelectric test, in particular to a broadband light source device for testing a photoelectric detector, which comprises a box body, an LED lamp, a switch for controlling the LED lamp to be turned on and off, a convex lens arranged in front of the LED lamp, a concave lens arranged in front of the convex lens, a reflective film arranged on the back of the concave lens, an optical fiber and a power supply device; the LED lamp, the convex lens and the concave lens are all arranged inside the box body; the utility model discloses a LED lamp produces the broadband light source to use optical device to handle the light source, solved among the prior art use hernia, deuterium light source when testing photoelectric detector light source consume energy big, the energy scatters and disappears many, the many technical problem of parasitic light.
Description
Technical Field
The utility model relates to a photoelectric test technical field especially relates to a broadband light source device is used in photoelectric detector test.
Background
The principle of photodetectors is that radiation causes a change in the conductivity of the irradiated material, and in principle any device that undergoes a significant physical property change due to optical radiation can be used as a photoelectric tester. The photoelectric detector has wide application in various fields of military and national economy. The manufacturer for producing the photoelectric tester needs to test the photoelectric tester in advance, and the testing method is to use a light source to irradiate the photoelectric tester and observe whether the change of the photoelectric tester meets the design requirement. Generally, a broadband light source is used for testing, equipment for generating the broadband light source in the prior art is a hernia lamp or a deuterium lamp, and the equipment for generating the broadband light source is large in energy consumption and energy loss and contradicts the advocation of environmental protection and energy conservation. And the wavelength section of the light source generated by the hernia lamp and the deuterium lamp is difficult to control, some photoelectric testers need to use the light source with a specific waveband for testing, some manufacturers produce different photoelectric testers, the light wave bands required for testing are different, and if the hernia lamp and the deuterium lamp are directly used for testing the photoelectric testers, more stray light affects the testing result.
Therefore, there is a need for improvement of the prior art to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
In view of this, an object of the present invention is to provide a broadband light source device for testing a photodetector, which solves the technical problems of large energy consumption, much energy dissipation and much stray light of a light source when a hernia and a deuterium light source are used to test the photodetector in the prior art. The method is realized by the following technical scheme:
the embodiment of the utility model provides a broadband light source device is used in photoelectric detector test, including box body, LED lamp, be used for controlling the LED lamp to open and the switch that closes, set up convex lens in the front of the LED lamp, set up the concave lens in the front of the convex lens, set up reflective membrane, optic fibre and the power supply unit on the back of concave lens; the box body can be made of a wood material, the interior of the box body is sealed, and rubber is arranged at the joint of the two sides of the box body, so that the sealing property is improved; the LED lamp, the convex lens and the concave lens are all arranged in the box body, the LED lamp is low in energy consumption and high in energy utilization rate, the LED lamp can emit light waves with specific wavelength bands, and due to the fact that the spectral band of the light waves emitted by a single LED lamp is narrow, a plurality of LED lamps can be controlled to emit light at the same time to obtain a broadband light source; the LED lamp is arranged on the focus of the convex lens, light emitted by the LED lamp is emitted in parallel after passing through the convex lens, the reflective film on the concave lens is used for reflecting light waves with a specific wavelength band, the wave band which can be reflected by the reflective film is selected according to the light wave band required by the test photoelectric detector, the reflective film reflects the light waves with the wave band required by the test photoelectric detector to the focus behind the concave lens, stray light is refracted to the front of the concave lens through the concave lens, the rear end of the optical fiber is arranged between the concave lens and the convex lens, the end face of the rear end is arranged on the focus of the concave lens, the light waves reflected by the reflective film enter the optical fiber through the rear end of the optical fiber for transmission, the front end of the optical fiber is connected with the photoelectric detector, and the light waves entering the optical fiber are emitted from the front end of the optical fiber and enter the photoelectric detector for; the LED lamp, the switch, the convex lens and the concave mirror are all set to be N, the wavelengths of light emitted by the N LED lamps are different, the optical fiber is set to be 1 minute of N optical fiber, the front end is set to be one, the rear end is set to be N, N is larger than or equal to 3, the number of the LED lamps can be determined according to needs, light wave bands emitted by different LED lamps are different, and the band of the broadband light source can be controlled accurately by controlling the started LED lamps.
Further, the broadband light source device for the photoelectric detector test further comprises a concave mirror arranged behind the LED lamp, the LED lamp is arranged on the focus of the concave mirror, part of light is emitted backwards when the LED lamp emits light, the concave mirror is arranged behind the LED lamp in order to reduce energy loss of a light source, the light emitted by the LED lamp is reflected by the concave mirror and then emitted forwards in parallel, the light wave passing through the convex lens is converged at the focus of the convex lens, the end face of the rear end of the optical fiber is arranged between the convex lens and the concave lens, the end face of each rear end is located at the focus of different convex lenses, and the light wave passing through the convex lens enters the optical fiber from the end face of the rear end of the optical fiber and is emitted from the front end of the optical fiber.
Further, the reflective membrane sets up to N layer, and every layer of reflective membrane can reflect the light wave of specific wave band, confirms the wave band of the light wave that needs the acquireing when every LED lamp starts as required, sets up the light wave band of every reflective membrane reflection and tests the light wave band that photoelectric detector needs when specific LED lamp starts, and the wave band that every layer of reflective membrane reflected the light wave is different, through setting up multilayer reflective membrane, only with the light wave injection optic fibre of needs, stray light sees through the concave lens and jets out, does not have stray light in the light wave of control entering optic fibre.
Furthermore, the broadband light source device for the photoelectric detector test also comprises a light absorption plate arranged in front of the concave lens, and stray light penetrating through the concave lens is emitted out of the front of the concave lens and absorbed by the light absorption plate, so that the stray light is prevented from entering the rear end of the optical fiber after being reflected for many times in the box body.
Further, the light absorption plate is set to be black, and black substances can absorb light waves of all wave bands.
Further, broadband light source device is used in photoelectric detector test still includes the vacuum air extractor of setting in the box, the box body seals the setting, can be earlier in the box evacuation before opening the LED lamp, and some can take place the energy level transition under the light wave shines in the gas molecule in the air, probably release the light wave with the wavelength different with the irradiation light wave after the transition, produce the miscellaneous light, influence photoelectric detector's test result, can take place the scattering after the gas energy level transition moreover, cause energy loss.
Furthermore, broadband light source device is used in photoelectric detector test still includes the electrostatic precipitator who sets up in the box, and some dusts in the air also can make the light wave take place the scattering, cause energy loss, and the dust removal is handled before starting the LED lamp, prevents the light wave scattering that the dust caused.
Furthermore, the surface of the optical fiber except the end face is coated with a reflective material, so that light waves are prevented from being emitted onto the surface of the optical fiber in the transmission process and entering the optical fiber through the side face of the optical fiber.
Further, the box body is set to be black.
The utility model discloses an actively profitable technological effect includes:
(1) the LED lamp is adopted to replace a hernia lamp and a deuterium lamp, so that the energy utilization rate is high, the stray light is less, and the energy is saved;
(2) the plurality of optical components are used for controlling almost all light waves emitted by the LED lamp to enter the photoelectric detector through the optical fibers to test the light waves, so that the energy loss is further reduced;
(3) the broadband light source is generated by adopting a plurality of LED lamps, so that the spectral line wave band of the broadband light source can be controlled more accurately;
(4) the light absorption plate is arranged and the box body is set to be black, so that stray light is prevented from reflecting into the optical fiber, and the optical wave band for testing the photoelectric detector is accurately controlled;
(5) through the steps of vacuumizing and dedusting, the energy level transition of air molecules is prevented, and light scattering caused by dust is prevented;
other advantageous effects of the present invention will be further described with reference to the following embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of an internal structure of a box according to an embodiment of the present invention;
fig. 2 is a perspective view of an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of the position A at 1:1.2 according to the embodiment of the present invention;
icon:
the direction of the arrow in the figure is the trend of the light path; 1-box body; 2-an LED lamp; 3, switching; a 4-convex lens; 5-a concave lens; 6-an optical fiber; 7-concave mirror; 8-a light panel; 9-photodetector.
Detailed Description
Example (b): a broadband light source device for testing a photoelectric detector 9 is shown in figures 1-2 and comprises a box body 1, an LED lamp 2, a switch 3 for controlling the LED lamp 2 to be turned on and off, a convex lens 4 arranged in front of the LED lamp 2, a concave lens 5 arranged in front of the convex lens 4, a reflective film arranged on the back of the concave lens 5, an optical fiber 6 and a power supply device, wherein the power supply device is used for supplying electric energy to the whole device, the front part is the right part in figure 1, and the back part is the left part in figure 1; the box body 1 can be made of a wood material, the interior of the box body 1 is sealed, and rubber is arranged at the joint of the two sides of the box body 1 to improve the sealing property; the LED lamp 2, the convex lens 4 and the concave lens 5 are all arranged inside the box body 1, the LED lamp 2 is low in energy consumption and high in energy utilization rate, the LED lamp 2 can emit light waves with specific wavelength bands, and due to the fact that the spectral wavelength bands of the light waves emitted by the single LED lamp 2 are narrow, the LED lamps 2 can be controlled to emit light simultaneously in order to obtain a broadband light source; the LED lamp 2 is arranged on the focus of the convex lens 4, light emitted by the LED lamp 2 is emitted after passing through the convex lens 4 and then is emitted to the concave lens 5 in parallel, a reflective film on the concave lens 5 is used for reflecting light waves with a specific wavelength band, a wave band which can be reflected by the reflective film is selected according to the wave band required by the test photoelectric detector 9, the light waves with the wave band required by the test photoelectric detector 9 are reflected to the focus behind the concave lens 5 by the reflective film, noise waves with other wave bands are emitted out through the concave lens 5 and emitted to the front of the concave lens 5, the rear end of the optical fiber 6 is arranged between the concave lens 5 and the convex lens 4, the end surface of the rear end of the optical fiber 6 is arranged on the focus of the concave lens 5, the light waves which are emitted to the concave lens 5 in parallel are reflected by the reflective film and then enter the end surface of the rear end of the optical fiber 6 to be transmitted in the optical fiber 6, the front end of the optical fiber 6 is connected with, the light enters a photoelectric detector 9, and the photoelectric detector 9 is tested; the LED lamp 2, the switch 3, the convex lens 4 and the concave mirror 7 are all set to be N, the wave bands of light emitted by the N LED lamps 2 are different, the optical fiber 6 is set to be 1 minute of N optical fibers 6, the front end is set to be one, the rear end is set to be N, N is larger than or equal to 3, the number of the LED lamps 2 can be determined according to needs, the light wave bands emitted by different LED lamps 2 are different, and the wave band range of the broadband light source can be controlled accurately by controlling the number of the started LED lamps 2.
In this embodiment, the broadband light source device for testing the photoelectric detector 9 further comprises a concave mirror 7 arranged behind the LED lamp 2, the LED lamp 2 is arranged on a focal point of the concave mirror 7, most of light waves are emitted from the front side when the LED lamp 2 emits light, but part of the light waves are emitted to the rear side, in order to reduce energy loss of the light source, the concave mirror 7 is arranged behind the LED lamp 2, the light emitted by the LED lamp 2 is reflected by the concave mirror 7 and then emitted to the front side in parallel, the light waves passing through the convex lens 4 are converged at the focal point of the convex lens 4, end faces of the rear ends of the optical fibers 6 are all arranged between the convex lens 4 and the concave lens 5, the end faces of each rear end are located at different focal points of the convex lens 4, and the light waves passing through the convex lens 4 enter the optical fibers 6 from the end faces of the rear ends of the optical fibers 6 and are emitted.
In this embodiment, the reflective membrane sets up to the N layer, the light wave of specific wave band can be reflected to every layer of reflective membrane, confirm the wave band of the light wave that test photoelectric detector 9 needs to obtain when every LED lamp 2 starts as required, the light wave band that test photoelectric detector 9 needs when setting up the light wave band of every reflective membrane reflection for specific LED lamp 2 starts, and the wave band of every layer of reflective membrane reflection light wave is different, through setting up multilayer reflective membrane, only inject optic fibre 6 with the light wave that needs, stray light sees through concave lens 5 and jets out, there is not stray light in the light wave that control got into in optic fibre 6, the wave band of photoelectric detector 9 light wave is tested in the accurate control.
In this embodiment, the broadband light source device for testing the photoelectric detector 9 further includes a light absorption plate 8 disposed in front of the concave lens 5, and the stray light passing through the concave lens 5 is emitted from the front of the concave lens 5 and absorbed by the light absorption plate 8, so as to prevent the stray light from entering the optical fiber 6 after being reflected for many times in the box body 1.
In this embodiment, the light absorption plate 8 is black, and the black material can absorb light waves of all bands.
In this embodiment, broadband light source device is used in test of photoelectric detector 9 still includes the vacuum air extractor of setting in the box, box body 1 seals up and sets up, can be earlier in the box evacuation before opening LED lamp 2, and some gas molecules in the air can take place the energy level transition under the light wave shines, probably release the light wave with the wavelength different from the shining light wave after the transition, produce the parasitic light, influence photoelectric detector 9's test result, can take place the scattering after the gas energy level transition moreover, cause energy loss.
In this embodiment, the broadband light source device for testing of the photoelectric detector 9 further comprises an electrostatic dust collector arranged in the box body, some dust in the air can also scatter light waves to cause energy loss, and dust removal processing is performed before the LED lamp 2 is started to prevent light wave scattering caused by dust.
In this embodiment, the surface of the optical fiber 6 except the end face is coated with a reflective material, so as to prevent light waves from being incident on the surface of the optical fiber 6 during the propagation process and entering the optical fiber 6 through the side face of the optical fiber 6.
In this embodiment, the box body 1 is set to be black
The implementation process comprises the following steps: determining a light wave band required by testing the photoelectric detector 9, turning on a specific LED lamp 2 according to a determined result, and enabling the light wave to enter the photoelectric detector 9 through the optical fiber 6 and test the light wave; if the light wave band required by the test is changed, the LED lamp 2 which is turned on is changed, the light wave band entering the optical fiber 6 is changed, and then the photoelectric detector 9 is tested.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (9)
1. A broadband light source device for testing a photoelectric detector is characterized in that: the LED lamp comprises a box body, an LED lamp, a switch for controlling the LED lamp to be turned on and off, a convex lens arranged in front of the LED lamp, a concave lens arranged in front of the convex lens, a reflective film arranged on the back of the concave lens, an optical fiber and a power supply device; the LED lamp, the convex lens and the concave lens are all arranged inside the box body; the LED lamp is arranged on the focus of the convex lens, the reflective film on the concave lens is used for reflecting light waves with a specific wavelength band, the rear end of the optical fiber is arranged between the concave lens and the convex lens, the end face of the rear end of the optical fiber is arranged on the focus of the concave lens, and the front end of the optical fiber is connected with the photoelectric detector; the LED lamp, the switch, the convex lens and the concave mirror are all set to be N, the wave bands of light emitted by the N LED lamps are different, the optical fiber is set to be 1 minute of N optical fibers, the front end is set to be one, the rear end is set to be N, and N is larger than or equal to 3.
2. The broadband light source device for testing of photodetectors according to claim 1, wherein: the LED lamp is arranged on the focus of the concave mirror, the end face of the rear end of the optical fiber is arranged between the convex lens and the concave lens, and the end face of each rear end is located on the focus of different convex lenses.
3. The broadband light source device for testing of photodetectors according to claim 2, wherein: the reflective film is arranged into N layers, and each layer of reflective film can reflect light waves of a specific wave band.
4. The broadband light source device for testing of photodetectors according to claim 3, wherein: the light absorption plate is arranged in front of the concave lens.
5. The broadband light source device for testing of photodetectors according to claim 4, wherein: the light absorption plate is set to be black.
6. The broadband light source device for testing of photodetectors according to claim 5, wherein: the vacuum air extractor is arranged in the box body, and the box body is arranged in a sealing mode.
7. The broadband light source device for testing of photodetectors according to claim 6, wherein: the electrostatic dust collector is arranged in the box body.
8. The broadband light source device for testing of photodetectors according to claim 7, wherein: except the end face of the optical fiber, the surface of the optical fiber is coated with a reflective material.
9. The broadband light source device for testing of photodetectors according to claim 8, wherein: the box body is set to be black.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021276370.5U CN212483926U (en) | 2020-07-03 | 2020-07-03 | Broadband light source device for testing photoelectric detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021276370.5U CN212483926U (en) | 2020-07-03 | 2020-07-03 | Broadband light source device for testing photoelectric detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112596292A (en) * | 2020-12-15 | 2021-04-02 | 国家电网有限公司 | Polarization-adjustable high-stability broadband light source for vertical shaft fire alarm system |
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- 2020-07-03 CN CN202021276370.5U patent/CN212483926U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112596292A (en) * | 2020-12-15 | 2021-04-02 | 国家电网有限公司 | Polarization-adjustable high-stability broadband light source for vertical shaft fire alarm system |
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