CN110940494A - Laser target simulator field calibration device - Google Patents
Laser target simulator field calibration device Download PDFInfo
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- CN110940494A CN110940494A CN201811105597.0A CN201811105597A CN110940494A CN 110940494 A CN110940494 A CN 110940494A CN 201811105597 A CN201811105597 A CN 201811105597A CN 110940494 A CN110940494 A CN 110940494A
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- laser
- target simulator
- laser energy
- laser target
- energy meter
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
Abstract
The invention provides a laser target simulator field calibration device, which comprises: the device comprises an iris diaphragm, an attenuation sheet, an imaging lens, an optical fiber connector, an optical fiber spectrometer, a point source detector, an oscilloscope, a laser energy meter probe, a laser energy meter gauge outfit, a rotary table and the like. Laser energy emitted by the laser target simulator passes through the variable diaphragm, the attenuation sheet and the imaging lens, and can be controlled to respectively enter the optical fiber connector, the point source detector or the laser energy meter probe through the rotary turntable, and parameter calibration is carried out by the corresponding optical fiber spectrometer, the oscilloscope and the laser energy meter head. Therefore, the field calibration of the spectral parameters, the frequency parameters and the energy parameters of the laser target simulator is realized. The technical scheme of the invention is applied to solve the field calibration problem of the laser target simulator.
Description
Technical Field
The invention relates to the field of laser target simulator calibration, in particular to field calibration of laser target simulator parameters.
Background
Before the missile is put into practical application, the performance of the missile must be effectively checked and evaluated to judge whether the missile can meet the design requirements. Common test methods include live ammunition target practice and semi-physical simulation under external field conditions. Because of the enormous costs of developing and launching missiles, it is not always possible to test the performance of the developed missiles and their guidance systems by live-action targeting. Compared with a live-missile target practice test, the laser semi-active guidance simulation test can complete the performance test of the missile guidance system under the indoor simulation condition by simulating the external field test condition and the target optical characteristic.
The laser target simulator is used as an important component in a laser semi-active guidance semi-physical simulation system, provides a simulated target laser signal similar to that in an external field environment for the whole simulation system, and is the key point for effectively carrying out the whole semi-physical simulation test. When the laser target simulator is used for simulation testing, various indexes of the laser target simulator must be calibrated so as to adjust the laser target simulator to enable the simulated laser target to have the same characteristics as the real laser target, and the accuracy of a simulation test result is ensured. Therefore, there is a need for a device capable of calibrating the typical specifications of a laser target simulator, such as spectral characteristics, frequency characteristics, power characteristics, and the like.
Disclosure of Invention
The invention aims to provide a field calibration device for a laser target simulator, which can solve the technical problem of field calibration of comprehensive parameters of the laser target simulator.
In order to achieve the above object, the present invention provides a laser target simulator field calibration apparatus, comprising: the device comprises an iris diaphragm, an attenuation sheet, an imaging lens, an optical fiber connector, an optical fiber spectrometer, a point source detector, an oscilloscope, a laser energy meter probe, a laser energy meter gauge outfit and a rotary table, wherein light emitted by the laser target simulator sequentially enters the imaging lens through the iris diaphragm and the attenuation sheet; the optical fiber connector, the point source detector and the laser energy meter probe can be respectively switched to the focal plane of the imaging lens by controlling the rotary table, the optical fiber spectrometer is connected with the optical fiber connector, the oscilloscope is connected with the point source detector, and the laser energy meter head is connected with the laser energy meter probe.
Further, the calibration device further comprises a housing. Further, the calibration device further comprises a two-dimensional displacement mechanism disposed below the housing.
Further, when the calibration device calibrates the laser energy uniformity of the laser target simulator, the clear aperture of the iris diaphragm is adjusted to be phi 10mm +/-0.2 mm.
Further, when the calibration device calibrates the spectral parameter or the frequency parameter of the laser target simulator or the laser energy stability, the clear aperture of the iris diaphragm is adjusted to be phi 100mm +/-0.5 mm.
Furthermore, the optical fiber connector, the point source detector and the laser energy meter probe are arranged on the rotary table through special tools and are circumferentially and uniformly distributed on the rotary table at an angle of 120 degrees.
The invention provides a field calibration device of a laser target simulator, which uses a rotary table to respectively switch an optical fiber connector, a point source detector and a laser energy meter probe into a light path, and can quickly calibrate spectral parameters, frequency parameters and energy parameters of the laser target simulator on the field through data operation processing.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic diagram of the components of a laser target simulator calibration apparatus according to one embodiment of the present invention;
included in the drawings are the following reference numerals:
10. a laser target simulator; 20. an iris diaphragm; 30. an attenuation sheet; 40. an imaging lens; 50. an optical fiber connector; 60. a fiber optic spectrometer; 70. a point source detector; 80. an oscilloscope; 90. a laser energy meter probe; 100. a laser energy meter head; 110. a turntable; 120. a housing; 130. a two-dimensional displacement mechanism.
FIG. 2 is a flowchart of calibration of spectral parameters of a laser target simulator;
FIG. 3 is a flow chart of laser target simulator frequency parameter calibration;
FIG. 4 is a flow chart of laser target simulator energy parameter calibration;
FIG. 5 illustrates selected laser target simulator positions in an embodiment of the invention for calibrating laser uniformity.
Detailed Description
The technical scheme of the invention is explained in detail in the following by combining the drawings and the embodiment.
As shown in fig. 1, the field calibration apparatus for a laser target simulator according to an embodiment of the present invention includes an iris diaphragm 20, an attenuation plate 30, an imaging lens 40, a fiber connector 50, a fiber spectrometer 60, a point source detector 70, an oscilloscope 80, a laser energy meter probe 90, a laser energy meter head 100, and a turntable 110. The light emitted by the laser target simulator enters the imaging lens 40 through the variable diaphragm 20 and the attenuation sheet 30 in sequence. The optical fiber connector 50, the point source detector 70 and the laser energy meter probe 90 are mounted on the rotary table 110 behind the imaging lens 40, and the optical fiber connector 50, the point source detector 70 and the laser energy meter probe 90 can be respectively switched to the focal plane of the imaging lens 40 by controlling the rotary table 110. The optical fiber spectrometer 60 is connected with the optical fiber connector 50 and can calibrate the spectral parameters of the laser target simulator; an oscilloscope 80 is connected to the point source detector 70 and is capable of calibrating pulse width and repetition rate. The laser energy meter gauge head 100 is connected with the laser energy meter probe 90, and can calibrate the stability and uniformity of the output energy of the laser target simulator.
The calibration device further comprises a housing 120, and the devices of the calibration device are integrated in the housing 120 and used for providing installation positions and protection for the devices of the calibration device. The calibration device further includes a two-dimensional displacement mechanism 130 disposed below the housing 120. The two-dimensional displacement mechanism 130 is used to adjust the relative position of the calibration device and the laser target simulator.
The iris diaphragm 20 is arranged on a laser light path emitted by the laser target simulator 10, and the iris diaphragm 20 is used for limiting the clear aperture of the field calibration device of the laser target simulator and adjusting the energy entering the calibration device. In this embodiment, when calibrating the laser energy uniformity of the laser target simulator, the clear aperture needs to be adjusted to be phi 10mm ± 0.2mm, the two-dimensional displacement mechanism 130 is used to calibrate the light energy uniformity of the light energy at the outlet of the laser target simulator, and when calibrating other parameters, the clear aperture needs to be adjusted to be phi 100mm ± 0.5 mm. The clear aperture is adjusted to be 10mm +/-0.2 mm, the sampling number can be increased when the uniformity of the laser target simulator is calibrated, the signal-to-noise ratio of the received laser energy is high, and the calibration result is accurate. In addition, the output aperture of the laser target simulator is generally smaller than 100mm, and the calibration device with the clear aperture phi of 100mm is selected in the embodiment, so that all energy of the laser target simulator can be received, and the calibration requirements of most laser target simulators can be met. When the output aperture of the laser target simulator is changed, the sizes of the iris diaphragm, the attenuation sheet and the imaging lens of the calibrating device can be adjusted, and the calibrating requirement is met.
The attenuation sheet 30 is used to attenuate the laser energy emitted by the laser target simulator 10 to match the energy to the subsequent response detector.
The imaging lens 40 is configured to converge laser energy emitted by the laser target simulator 10 at infinity to a focal plane of the imaging lens, so as to form a circular light spot on the focal plane, which is received by the optical fiber connector 50, the point source detector 70, and the laser energy meter probe 90 inside the calibration apparatus.
The optical fiber connector 50 is used for receiving laser energy emitted by the laser target simulator and transmitting the laser energy to the optical fiber spectrometer, and laser forms a circular light spot on one end face of the optical fiber connector 50 and enters the optical fiber spectrometer 60 from the other end of the optical fiber connector 50; the fiber spectrometer 60 is used for receiving laser energy of the laser target simulator and calibrating spectral parameters; the point source detector 70 is used for receiving laser energy at a high speed and outputting a voltage signal for a subsequent oscilloscope; the oscilloscope 80 is used for connecting the point source detector and displaying the waveform of laser energy emitted by the laser target simulator in real time, obtaining pulse width and repetition frequency and carrying out frequency calibration; the laser energy meter probe 90 is used for receiving laser energy emitted by the laser target simulator and converting a laser energy signal into an electric signal according to a processing circuit of the laser energy meter probe; the laser energy meter gauge outfit 100 is used for receiving the electric signal of the laser energy meter probe and displaying the laser energy parameter, and carrying out laser energy parameter calibration.
The turret 110 is used to load the various detectors and fiber optic connectors and to selectively switch devices into the optical path.
Further, the optical fiber connector 50, the point source detector 70, and the laser energy meter probe 90 are all designed with special tools to be installed on the turntable 110, and are circumferentially and uniformly distributed on the turntable 110 at 120 °. When the parameters of the laser target simulator are calibrated, the position of the rotary table needs to be adjusted, so that the corresponding calibration equipment is positioned at the focal plane of the imaging lens.
The laser target simulator spectral parameter calibration flow chart is shown in fig. 2. The laser target simulator emits laser, the laser firstly passes through the iris diaphragm, and the light-passing aperture of the iris diaphragm is adjusted to be phi 100mm at the moment. The laser output from the iris diaphragm enters the attenuation sheet, and the attenuation sheet is adjusted to be in a normal working state of the detector. After being attenuated by the attenuation sheet, the laser enters the imaging lens again. The imaging lens converges laser energy at infinity emitted by the laser target simulator to a focal plane of the imaging lens. And adjusting the angle of the rotary table to enable the optical fiber connector on the rotary table to be positioned at the focal plane of the imaging lens. And the laser enters the optical fiber connector on the turntable after passing through the imaging lens. The laser is transmitted into the fiber spectrometer through the fiber connector, and the fiber spectrometer displays the central wavelength of the laser output by the laser target simulator after receiving the laser energy.
The laser target simulator frequency parameter calibration flow chart is shown in fig. 3. The laser target simulator emits laser, the laser firstly passes through the iris diaphragm, and the light-passing aperture of the iris diaphragm is adjusted to be phi 100mm at the moment. The laser output from the iris diaphragm enters the attenuation sheet, and the attenuation sheet is adjusted to be in a normal working state of the detector. After being attenuated by the attenuation sheet, the laser enters the imaging lens again. The imaging lens converges laser energy at infinity emitted by the laser target simulator to a focal plane of the imaging lens. And adjusting the angle of the rotary table to enable the point source detector on the rotary table to be located at the focal plane of the imaging lens. And the laser enters a point source detector on the rotary table after passing through the imaging lens. The point source detector is connected with the oscilloscope. The oscilloscope can display the waveform, pulse width and repetition frequency of the laser output by the laser target simulator.
The laser target simulator energy parameter calibration flow chart is shown in fig. 4. The laser target simulator emits laser, the laser firstly passes through the iris diaphragm, and when the stability of the output laser energy is calibrated, the light-passing aperture of the iris diaphragm is adjusted to be phi 100mm +/-0.5 mm. When the uniformity of the output laser energy is calibrated, the light-passing aperture of the iris diaphragm is adjusted to be phi 10mm +/-0.2 mm, at the moment, the calibration device can only receive a part of laser energy in the full aperture emitted by the laser target simulator, the two-dimensional displacement mechanism is adjusted, and the energy at different positions of the exit pupil of the laser target simulator can be received. The laser output from the iris diaphragm enters the attenuation sheet, and the attenuation sheet is adjusted to be in a normal working state of the detector. After being attenuated by the attenuation sheet, the laser enters the imaging lens again. The imaging lens converges laser energy at infinity emitted by the laser target simulator to a focal plane of the imaging lens. And adjusting the angle of the rotary table to enable the laser energy meter probe on the rotary table to be positioned at the focal plane of the imaging lens. After passing through the imaging lens, the laser enters a laser energy meter probe on the turntable, and then the energy value of the output laser is displayed by a laser energy meter head connected with the laser energy meter probe. In this embodiment, when the stability is calibrated, data is recorded every five minutes for 0.5h continuously, an average value of seven data is calculated, and the maximum difference between each data and the average value is taken as the stability result. When the uniformity is calibrated, the two-dimensional displacement mechanism is moved to enable different positions at the exit pupil of the laser target simulator to be aligned with the iris diaphragm, and the selected positions are as shown in figure 5. In this embodiment, laser energy values at different positions are recorded, an average value of nine values is calculated, and a maximum difference between each data and the average value is taken as a uniformity result.
In summary, the embodiments of the present invention provide an on-site calibration apparatus for a laser target simulator, where the calibration apparatus uses an iris, an attenuation plate and an imaging lens to preprocess laser, detects the laser through a fiber connector, a point source detector and a laser energy meter probe, respectively, and then analyzes the laser through a data processing part of a calibration apparatus, and finally displays the laser on an instrument, thereby calibrating spectral parameters, energy parameters and frequency parameters of the laser target simulator on site.
The above description is only one embodiment of the present invention, and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The field calibration device of the laser target simulator is characterized by comprising an iris diaphragm, an attenuation sheet, an imaging lens, an optical fiber connector, an optical fiber spectrometer, a point source detector, an oscilloscope, a laser energy meter probe, a laser energy meter gauge outfit and a rotary table;
the light emitted by the laser target simulator enters the imaging lens through the iris diaphragm and the attenuation sheet in sequence, the optical fiber connector, the point source detector and the laser energy meter probe are mounted on the rotary table behind the imaging lens, and the optical fiber connector, the point source detector and the laser energy meter probe are respectively switched to the focal plane of the imaging lens by controlling the rotary table;
the fiber spectrometer is connected with a fiber connector, the oscilloscope is connected with a point source detector, and the meter head of the laser energy meter is connected with the probe of the laser energy meter.
2. The laser target simulator field calibration device of claim 1, wherein the calibration device further comprises a housing.
3. The laser target simulator field calibration device of claim 2, wherein the calibration device further comprises a two-dimensional displacement mechanism disposed below the housing.
4. The laser target simulator in situ calibration apparatus of claim 1, wherein the clear aperture of the iris is adjusted to be equal to when the calibration apparatus calibrates the laser energy uniformity of the laser target simulator
5. The in-situ calibration device for laser target simulator of claim 1, wherein the light-passing aperture of the iris is adjusted to be equal to the light-passing aperture when the calibration device calibrates the spectral parameter or the frequency parameter or the laser energy stability of the laser target simulator
6. The field calibration device for the laser target simulator according to claim 1, wherein the fiber connector, the point source detector and the laser energy meter probe are mounted on the turntable through special tools and are circumferentially and uniformly distributed on the turntable at 120 degrees.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811105597.0A CN110940494A (en) | 2018-09-21 | 2018-09-21 | Laser target simulator field calibration device |
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| CN201811105597.0A CN110940494A (en) | 2018-09-21 | 2018-09-21 | Laser target simulator field calibration device |
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| CN110940494A true CN110940494A (en) | 2020-03-31 |
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| CN203881515U (en) * | 2014-03-28 | 2014-10-15 | 中国科学院上海技术物理研究所 | Self-reference acousto-optic tunable light filter diffraction performance testing device |
| CN206817119U (en) * | 2017-06-21 | 2017-12-29 | 中国人民解放军空军第一航空学院 | Twin shaft electrical turntable for photoelectric sensor |
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2018
- 2018-09-21 CN CN201811105597.0A patent/CN110940494A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080043232A1 (en) * | 2006-08-15 | 2008-02-21 | Industrial Technology Research Institute | Multi-angle and multi-channel inspecting device |
| CN102384836A (en) * | 2010-09-01 | 2012-03-21 | 中国科学院光电研究院 | Laser multi-parameter real-time measuring device |
| CN102722001A (en) * | 2011-03-30 | 2012-10-10 | 捷耀光通讯股份有限公司 | Light switching apparatus |
| CN102706541A (en) * | 2012-06-15 | 2012-10-03 | 北京理工大学 | System for detecting comprehensive performance of laser radiator based on virtual instrument |
| CN102998089A (en) * | 2012-11-23 | 2013-03-27 | 北京振兴计量测试研究所 | Calibration device of ultra-far ultraviolet detector |
| CN203881515U (en) * | 2014-03-28 | 2014-10-15 | 中国科学院上海技术物理研究所 | Self-reference acousto-optic tunable light filter diffraction performance testing device |
| CN206817119U (en) * | 2017-06-21 | 2017-12-29 | 中国人民解放军空军第一航空学院 | Twin shaft electrical turntable for photoelectric sensor |
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Application publication date: 20200331 |