CN108168701A - Full-aperture back scattered light measurement system for bundled targeting laser - Google Patents
Full-aperture back scattered light measurement system for bundled targeting laser Download PDFInfo
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- CN108168701A CN108168701A CN201711343130.5A CN201711343130A CN108168701A CN 108168701 A CN108168701 A CN 108168701A CN 201711343130 A CN201711343130 A CN 201711343130A CN 108168701 A CN108168701 A CN 108168701A
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- 238000005259 measurement Methods 0.000 title claims abstract description 135
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- 230000003595 spectral effect Effects 0.000 claims description 42
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- 238000003384 imaging method Methods 0.000 claims description 6
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- 238000004611 spectroscopical analysis Methods 0.000 claims description 2
- 238000001228 spectrum Methods 0.000 abstract description 4
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- 230000004927 fusion Effects 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
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- 238000002474 experimental method Methods 0.000 description 2
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- 208000033999 Device damage Diseases 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
- G01J2003/425—Reflectance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The invention belongs to the technical field of optical measurement, and particularly relates to a full-aperture back scattering light measurement system for bundled target laser. The invention adopts a probe group to directly measure the diffuse reflection superposed signals of a plurality of reflection type scattering plates, and specifically comprises space distribution measurement, spectrum measurement, time measurement, energy measurement and the like.
Description
Technical field
The invention belongs to field of optical measuring technologies, and in particular to a kind of full aperture for boundling target practice laser is backwards to scattered
Penetrate light measurement system.
Background technology
Laser fusion is a kind of human controllable's nuclear fusion generally used at present, it all has ten on civilian and military
Divide great research significance：A kind of inexhaustible Clear nuclear energy source is explored for the mankind；For developing " clean ", (no radiation is dirty
Dye) nuclear weapon, development high energy laser weapon；Partial alternative nuclear tests.
Therefore, laser fusion is paid much attention to by each nuclear power of the world, since second half the 1970s,
The states such as Russia, U.S., day, method, China and British start the development of high-power laser driver in succession.Research of the U.S. in this field is in neck
First status, and formally built up the ultra-large type laser driving apparatus " NIF " comprising 192 beams in 2009；The MLF that France is building
Include 240 beam laser；Construction large laser driver is also fermenting, and plan to complete to apply between 2015-2020 in Japan
In the basic technology research of power generation.China also establishes a series of laser driving apparatus (starlight series, God Light series etc.),
The laser driving apparatus " Shenguang-Ⅲ " for completing the largest domestic built includes 48 beam laser within 2015.
However, U.S. NIF did not succeed in the igniting of 2010, this causes larger shock in world wide.NIF with
Afterwards the study found that the original theoretical model verified on small-scale laser driver on NIF no longer be applicable in, NIF practice shooting
The backscattering share of laser is well beyond original desired value, and target practice laser energy is substantially slackened, fusion fuel compression
Symmetry is destroyed, and leads to loss of ignition.It can be seen that in following laser-produced fusion driving device is built, on the one hand
Increase the way of driving laser, promote driving force, on the other hand to pay attention to the measurement of back-scattering light, strengthen backscattering object
Manage the research of mechanism.
The igniter of country's planning, scale are running far super and filled in any one Laser Driven built in the world
It puts, laser beam sum is huge, and target range light path is intricate, and free air anomaly is nervous；In addition, it is practiced shooting using 8 constriction beams, (8 beams swash
Light is closely arranged, and imports target chamber parallel), local laser beam is excessively concentrated, and it is empty substantially to have compressed the available diagnosis of single beam laser
Between.
Existing full aperture backscattering light measurement system is not suitable for following igniter, mainly there is following several respects
The reason of：
(1) efficiency is low
A set of equipment can only measure the full aperture back-scattering light of 1 beam target practice laser, practice shooting applied to multiple laser boundling
Extensive laser driving apparatus in when, per Shu Jiguang will independent measurement, it is less efficient；
(2) volume is big
Single beam full aperture backscattering light beam is the directional light that cross section is 400mm × 400mm, in order to realize that shrink beam is surveyed
Amount, it is desirable that the bore of shrink beam element big (φ 600mm), focal length length (f：3m), this leads to single beam full aperture backscattering light measurement
Sufficiently bulky (2.0m × 1.0m × 2.2m) of system.It, will in the case of very nervous in following igniter target range space
Be applied to igniter be unpractical；
(3) light path is complicated
For existing full aperture backscattering light measurement system by after heavy caliber light beam shrink beam, subsequent light path is sufficiently complex：
Light beam after shrink beam is detached by dichroscope spectrum, is divided into two branch of long wave and shortwave；Carry out space respectively in the two branches
Filtering, collimation, sampling and spatial distribution measurement, sampling and spectral measurement, sampling and time measurement, sampling and energy measurement；Light
Road complex.
(4) energy bidirectional flow is low
Using aluminium mirror, the laser damage threshold of aluminium mirror is relatively low for heavy caliber, focal length off-axis paraboloidal mirror in existing system
(it is less than 0.5J/cm2), therefore also need to decline by a heavy caliber is spectroscopical before full aperture back-scattering light arrival aluminium mirror
Subtract.
Invention content
In order to solve the above technical problems existing in the prior art, the present invention provides a kind of for boundling target practice laser
Full aperture backscattering light measurement system has many advantages, such as that efficient, small, light path is simple, energy bidirectional flow is high.
The present invention technical solution be：A kind of full aperture backscattering light measurement system for boundling target practice laser
System, is characterized in that：Including multiple reflection-type scatter plates with same off axis paraboloid mirror face type, all reflection-type scatterings
The reflecting surface of plate is located on same paraboloid, and the paraboloidal focal point is provided with probe group.
Further, above-mentioned probe group includes two energy measuring units, two time measuring units, two spectral measurements
Unit, a calibration contact unit and a spatial distribution measuring unit；Two energy measuring units are respectively used to carry out long wave
Energy measurement and shortwave energy measurement, two time measuring units are respectively used to carry out long wave time measurement and the shortwave time surveys
Amount, two spectral measurement units are respectively used to carry out long wave spectral measurement and shortwave spectral measurement.
Preferably, above-mentioned energy measuring unit includes the energy measurement bandpass filter, the energy that are set gradually along optical path direction
Measurement iris diaphgram, energy measurement optically focused camera lens and energy meter.
Further, in the energy measuring unit for long wave energy measurement, the thang-kng of energy measurement bandpass filter
Bandwidth is 400-700nm；In the energy measuring unit for shortwave energy measurement, the thang-kng band of energy measurement bandpass filter
Width is 351 ± 3nm.
Preferably, above-mentioned time measuring unit include the time measurement bandpass filter set gradually along optical path direction, when
Between measure coupling camera lens and fast photoelectric tube.
Further, in the time measuring unit for long wave time measurement, the thang-kng of time measurement bandpass filter
Bandwidth is 400-700nm；In the time measuring unit for shortwave time measurement, the thang-kng band of time measurement bandpass filter
Width is 351 ± 3nm.
Preferably, above-mentioned spectral measurement unit includes the spectral measurement bandpass filter, the light that are set gradually along optical path direction
Spectrometry diaphragm, spectral measurement coupling camera lens and multimode fibre, the multimode fibre are connected with spectrometer.
Further, in the spectral measurement unit for long wave spectral measurement, the thang-kng of spectral measurement bandpass filter
Bandwidth is 400-700nm；In the spectral measurement unit for shortwave spectral measurement, the thang-kng band of spectral measurement bandpass filter
Width is 351 ± 3nm.
Preferably, above-mentioned calibration contact unit includes photoelectric probe and rotatable cover sheet.
Preferably, above-mentioned spatial distribution measuring unit includes spatial distribution imaging lens and ICCD cameras, the space point
Spatial distribution is provided in cloth imaging lens and measures iris diaphgram.
The beneficial effects of the present invention are：The present invention proposes a kind of full aperture backscattering for boundling target practice laser
Light measurement system.Scatter plate damage threshold is high, overcomes the problem of existing diagnostic device damage threshold is low；Using a probe group
Directly the superposed signal that diffuses of multiple scatter plates is measured and (specifically includes spatial distribution measurement, spectral measurement, time
Measure, energy measurement), sampling and optical path are significantly simplified, has that efficient, small, light path is simple, Energy Damage threshold
It is worth the advantages that high.
Description of the drawings
Fig. 1 is that optical path structure of the present invention for the full aperture backscattering light measurement system of boundling target practice laser is shown
It is intended to.
Fig. 2 is the A direction views of optical path in Fig. 1.
Fig. 3 is the preferred embodiment planar structure schematic diagram of probe group of the present invention.
Fig. 4 is energy measuring unit structure diagram of the present invention.
Fig. 5 is time measuring unit structure diagram of the present invention.
Fig. 6 is spectral measurement cellular construction schematic diagram of the present invention.
Fig. 7 is present invention calibration contact unit structure diagram.
Fig. 8 is spatial distribution measuring unit structure diagram of the present invention.
Wherein, reference numeral is：1- full aperture back-scattering lights, 2- reflection-type scatter plates, 3- probe groups, 4- paraboloids,
31- energy measuring units, 311- energy measurement bandpass filters, 312- energy measurement iris diaphgrams, 313- energy measurement optically focused
Camera lens, 314- energy meters, 32- time measuring units, 321- time measurement bandpass filters, 322- time measurements coupling camera lens,
The fast photoelectric tubes of 323-, 33- spectral measurement units, 331- spectral measurement bandpass filters, 332- spectral measurement diaphragms, 333- spectrum
It measures and couples camera lens, 334- multimode fibres, 34- calibration contact units, 341- photoelectric probes, the rotatable cover sheets of 342-,
343- stepper motors, 35- spatial distribution measuring units, 351- spatial distribution imaging lens, 352-ICCD cameras, 353- spaces point
Cloth measures iris diaphgram.
Specific embodiment
Referring to Fig. 1, the present invention provides a kind of full aperture backscattering light measurement system for boundling target practice laser, this is
System includes multiple reflection-type scatter plates 2 with same off axis paraboloid mirror face type, and the reflecting surface of all reflection-type scatter plates 2 is located at
On same paraboloid 4, the focal point of paraboloid 4 is provided with probe group 3.
Referring to Fig. 2, in the present embodiment, the arrangement of boundling target practice laser is similar to 3 × 3 arrays of intercalary delection,
Share 8 beam laser；Their own full aperture back-scattering light 1 is inversely transmitted along respective target practice light path, via optical spectrometer
It is separated from target practice light path, into full aperture backscattering measuring system.The rectangular full aperture back-scattering light of 8 beams
1 arrangement is similar to target practice laser, similar to 3 × 3 array structures of intercalary delection；With same off axis paraboloid mirror face type
8 pieces of reflection-type scatter plates 2 receive 8 beam full aperture back-scattering lights 1 respectively, and by it in the form of nearly lambert scatters scattering in
Hemisphere spatial domain, the probe group 3 in public parabolic focus are used for the mixed signal to 8 beam full aperture back-scattering lights 1
Measuring multiple parameters are carried out, specifically include spatial distribution measurement, spectral measurement, time measurement, energy measurement etc..
For reflection-type scatter plate 2, the design of parabolic shape be in order to reduce time measurement error, off-axis design be in order to
Prevent probe group from blocking light path.It is no any aberration at parabolic focus according to optics common sense, that is, reaches each of focus
The equivalent optical path of kind light, there is no the time differences.Scatter plate with same paraboloid surface type is divided into 8 pieces of original by the present embodiment
Because being the bore for reducing one-piece part, easy to process and detection.
Referring to Fig. 3, probe group 3 includes two spectral measurements of time measuring unit 32, two of energy measuring unit 31, two
33, calibration contact units 34 of unit and a spatial distribution measuring unit 35.Two energy measuring units 31 are respectively used to
Carry out long wave energy measurement and shortwave energy measurement, two time measuring units 32 are respectively used to carry out long wave time measurement and short
Wave time measurement, two spectral measurement units 33 are respectively used to carry out long wave spectral measurement and shortwave spectral measurement.
Referring to Fig. 4, energy measuring unit 31 include the energy measurement bandpass filter 311 set gradually along optical path direction,
Energy measurement iris diaphgram 312, energy measurement optically focused camera lens 313 and energy meter 314.During applied to long wave measurement, energy measurement
The thang-kng bandwidth of bandpass filter 311 is 400-700nm；When being measured applied to shortwave, energy measurement bandpass filter 311 leads to
Light belt width is 351 ± 3nm.Energy measurement iris diaphgram 312 can adjust the size of thang-kng amount, to meet different levels of scatter
The demand of various experiments.
Referring to Fig. 5, time measuring unit 32 include the time measurement bandpass filter 321 set gradually along optical path direction,
Time measurement couples camera lens 322 and fast photoelectric tube 323.During applied to long wave measurement, the thang-kng of time measurement bandpass filter 321
Bandwidth is 400-700nm；When being measured applied to shortwave, the thang-kng bandwidth of time measurement bandpass filter 321 is 351 ± 3nm.
During scattering time measures, to reduce time measurement error, the face type of scatter plate is designed as paraboloid, while probe group is placed in
At parabolic focus, theoretically the temporal dispersion at parabolic focus is zero, this is extremely advantageous for time measuring unit.
Referring to Fig. 6, spectral measurement unit 33 include the spectral measurement bandpass filter 331 set gradually along optical path direction,
Spectral measurement diaphragm 332, spectral measurement coupling camera lens 333 and multimode fibre 334, multimode fibre 334 are connected with spectrometer.Using
When long wave measurement, the thang-kng bandwidth of spectral measurement bandpass filter 331 is 400-700nm；When being measured applied to shortwave, spectrum
The thang-kng bandwidth for measuring bandpass filter 331 is 351 ± 3nm.
Fig. 7 is participated in, calibration contact unit 34 includes photoelectric probe 341 and rotatable cover sheet 342.Rotatable protection cap
Plate 342 can rotate under the driving of stepper motor 343, in mark time opening, close to protect photoelectric probe after calibration
341。
Referring to Fig. 8, spatial distribution measuring unit 35 includes spatial distribution imaging lens 351 and ICCD cameras 352, space point
Spatial distribution is provided in cloth imaging lens 351 and measures iris diaphgram 353.Spatial distribution measures iris diaphgram 353 and can control
Thang-kng amount prevents ICCD cameras 352 under-exposed or supersaturated.
In the present embodiment, each measuring unit in probe group 3 is mutual indepedent, and there is no the light splitting that multiple beam splitting measures again
Light path, it is simple in structure.Meanwhile calibration probe is integrated in probe group, calibration and experiment both of which are remote controlled, simplify
Daily calibration flow.
Claims (10)
1. a kind of full aperture backscattering light measurement system for boundling target practice laser, it is characterised in that：Have including multiple
The reflection-type scatter plate of same off axis paraboloid mirror face type, the reflecting surface of all reflection-type scatter plates are located on same paraboloid,
The paraboloidal focal point is provided with probe group.
2. the full aperture backscattering light measurement system according to claim 1 for boundling target practice laser, feature exists
In：The probe group includes two energy measuring units, two time measuring units, two spectral measurement units, a calibration
Contact unit and a spatial distribution measuring unit；Two energy measuring units are respectively used to carry out long wave energy measurement and shortwave
Energy measurement, two time measuring units are respectively used to carry out long wave time measurement and shortwave time measurement, two spectral measurements
Unit is respectively used to carry out long wave spectral measurement and shortwave spectral measurement.
3. the full aperture backscattering light measurement system according to claim 2 for boundling target practice laser, feature exists
In：The energy measuring unit includes the energy measurement bandpass filter that is set gradually along optical path direction, energy measurement can darkening
Door screen, energy measurement optically focused camera lens and energy meter.
4. the full aperture backscattering light measurement system according to claim 3 for boundling target practice laser, feature exists
In：In the energy measuring unit for long wave energy measurement, the thang-kng bandwidth of energy measurement bandpass filter is 400-
700nm；In the energy measuring unit for shortwave energy measurement, the thang-kng bandwidth of energy measurement bandpass filter for 351 ±
3nm。
5. the full aperture backscattering light measurement system according to claim 2 for boundling target practice laser, feature exists
In：The time measuring unit includes the time measurement bandpass filter, the time measurement coupling mirror that are set gradually along optical path direction
Head and fast photoelectric tube.
6. the full aperture backscattering light measurement system according to claim 5 for boundling target practice laser, feature exists
In：In the time measuring unit for long wave time measurement, the thang-kng bandwidth of time measurement bandpass filter is 400-
700nm；In the time measuring unit for shortwave time measurement, the thang-kng bandwidth of time measurement bandpass filter for 351 ±
3nm。
7. the full aperture backscattering light measurement system according to claim 2 for boundling target practice laser, feature exists
In：The spectral measurement unit includes the spectral measurement bandpass filter, spectral measurement diaphragm, the light that are set gradually along optical path direction
Spectrometry couples camera lens and multimode fibre, the multimode fibre are connected with spectrometer.
8. the full aperture backscattering light measurement system according to claim 7 for boundling target practice laser, feature exists
In：In the spectral measurement unit for long wave spectral measurement, the thang-kng bandwidth of spectral measurement bandpass filter is 400-
700nm；In the spectral measurement unit for shortwave spectral measurement, the thang-kng bandwidth of spectral measurement bandpass filter for 351 ±
3nm。
9. according to the full aperture backscattering light measurement system for boundling target practice laser any in claim 2-8,
It is characterized in that：The calibration contact unit includes photoelectric probe and rotatable cover sheet.
10. according to the full aperture backscattering light measurement system for boundling target practice laser any in claim 2-8,
It is characterized in that：The spatial distribution measuring unit include spatial distribution imaging lens and ICCD cameras, the spatial distribution into
Iris diaphgram is measured as being provided with spatial distribution in camera lens.
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| CN201711343130.5A CN108168701B (en) | 2017-12-14 | 2017-12-14 | Full-aperture back-scattered light measurement system for clustered targeting laser |
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| CN201711343130.5A CN108168701B (en) | 2017-12-14 | 2017-12-14 | Full-aperture back-scattered light measurement system for clustered targeting laser |
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Citations (5)
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| US20100276569A1 (en) * | 2009-04-30 | 2010-11-04 | Bae Systems Information And Electronic Systems Integration Inc. | Low backscatter test method and apparatus |
| US20120154819A1 (en) * | 2010-12-17 | 2012-06-21 | Joshua Monroe Cobb | Interferometer with paraboloidal illumination and imaging optic and tilted imaging plane |
| CN103335607A (en) * | 2013-06-28 | 2013-10-02 | 中国科学院西安光学精密机械研究所 | Large-caliber metal off-axis ellipsoidal mirror or parabolic mirror surface shape inspection device and inspection method |
| CN106198325A (en) * | 2016-06-27 | 2016-12-07 | 南开大学 | In a kind of on-line checking suspension molecule size distribution the measuring and analysis system of elastic scattering spectra dorsad and analyze method |
| CN207636185U (en) * | 2017-12-14 | 2018-07-20 | 中国科学院西安光学精密机械研究所 | Full-aperture back scattered light measurement system for bundled targeting laser |
-
2017
- 2017-12-14 CN CN201711343130.5A patent/CN108168701B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100276569A1 (en) * | 2009-04-30 | 2010-11-04 | Bae Systems Information And Electronic Systems Integration Inc. | Low backscatter test method and apparatus |
| US20120154819A1 (en) * | 2010-12-17 | 2012-06-21 | Joshua Monroe Cobb | Interferometer with paraboloidal illumination and imaging optic and tilted imaging plane |
| CN103335607A (en) * | 2013-06-28 | 2013-10-02 | 中国科学院西安光学精密机械研究所 | Large-caliber metal off-axis ellipsoidal mirror or parabolic mirror surface shape inspection device and inspection method |
| CN106198325A (en) * | 2016-06-27 | 2016-12-07 | 南开大学 | In a kind of on-line checking suspension molecule size distribution the measuring and analysis system of elastic scattering spectra dorsad and analyze method |
| CN207636185U (en) * | 2017-12-14 | 2018-07-20 | 中国科学院西安光学精密机械研究所 | Full-aperture back scattered light measurement system for bundled targeting laser |
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