CN105423922A - Coaxial calibration sensor and laser calibration method - Google Patents
Coaxial calibration sensor and laser calibration method Download PDFInfo
- Publication number
- CN105423922A CN105423922A CN201511008670.9A CN201511008670A CN105423922A CN 105423922 A CN105423922 A CN 105423922A CN 201511008670 A CN201511008670 A CN 201511008670A CN 105423922 A CN105423922 A CN 105423922A
- Authority
- CN
- China
- Prior art keywords
- laser
- frequency
- calibration
- optical filter
- catoptron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Lasers (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention discloses a coaxial calibration sensor and a laser calibration method. The coaxial calibration sensor comprises an absorption mirror, a filter and a CCD chip sequentially along the laser transmission direction, wherein the absorption mirror is glass absorbing all of fundamental frequency laser and frequency-doubled laser; the surface of the absorption mirror is plated with a frequency-tripled laser high reflection film; and the filter is glass absorbing part of the frequency-tripled laser. The device and the method are simple and easy to operate, the operation is convenient, and the device and the method are particularly applicable to more beam laser target surface coaxial calibration in the technical field of large-sized laser driver high-precision laser targeting.
Description
Technical field
The present invention relates to inertial confinement fusion (ICF) large laser driver high-precision laser Knockout technology field, in particular to a kind of coaxial calibration sensor and the method for carrying out laser calibration thereof.
Background technology
The thought of inertial confinement fusion is the high density utilizing energetic particle beam DT target ball to be compressed to every cubic centimetre of a few hectogram within the time of a few nanosecond, and pressure is several hundred million atmospheric pressure, thus pellet to be fought burning being partially formed hot spot point.
Along with the appearance of laser technology, people begin one's study and utilize the very high power density of light laser and fabulous directivity to bombard deuterium-tritium target, and allow them produce controlled inertial confinement fusion thus to discharge fusion energy, Here it is " laser fusion ".
In order to multiple laser being directed on target that diameter is millimeter magnitude, need special exact instrument to realize the coupling of bundle target to guide, because incident laser power is higher, after target spot place focuses on, energy is stronger, directly cannot guide with instrument, therefore need coupling one tunnel low-yield but coaxially carry out light beam guiding with the simulated laser on corrugated to replace main laser with incident laser.In view of main laser and simulated laser exist certain system deviation, therefore need target spot place adjustment main laser and simulated laser overlap completely or calibrate both error to carry out system correction.
Summary of the invention
For above-mentioned problems of the prior art, the invention provides a kind of coaxial calibration sensor and carry out the method for laser calibration, the method is simple, easy to operate, and a lot of Shu Jiguang target surface being specially adapted to large laser driver high-precision laser Knockout technology field is coaxially demarcated.
For achieving the above object, the invention provides following technical scheme:
A kind of coaxial calibration sensor, direction along Laser Transmission comprises successively: absorb catoptron, optical filter and CCD chip, described absorption catoptron is the glass to basic frequency laser and two double-frequency laser hypersorptions, described absorption mirror surface is coated with frequency tripled laser high-reflecting film, and described optical filter is the glass partially absorbed frequency tripled laser.
Further, the image planes of described CCD chip and target chamber center are relative to described absorption mirror conjugation.
Further, described optical filter is 50% to the transmitance of frequency tripled laser.
Further, the thickness of described optical filter is 3-4mm.
Separately, the present invention also provides a kind of method utilizing above-mentioned coaxial calibration sensor to carry out laser calibration, comprise: after condenser lens, incided absorption catoptron by Calibration of Laser, absorb catoptron to absorb by the basic frequency laser in Calibration of Laser and two double-frequency lasers, and frequency tripled laser is reflexed to optical filter, after optical filter partially absorbs frequency tripled laser, remaining frequency tripled laser is incident to CCD chip, CCD chip gathers the focal spot of frequency tripled laser, then the focal spot of simulated laser is gathered, simulated laser is adjusted by the position deviation between Calibration of Laser and simulated laser by calculating.
Further, described optical filter is 50% to the transmitance of frequency tripled laser.
Beneficial effect of the present invention is as follows:
1, the present invention adopts and absorbs mirror absorption by the fundamental frequency part in the superlaser demarcated and two frequency multiplication parts, and the frequency tripling part of carrying out demarcating only will be needed to reflect, and eliminates fundamental frequency part and two frequency multiplication parts to the interference of the information acquisition of CCD chip;
2, the present invention adopts optical filter to partially absorb frequency tripled laser, to reduce the laser energy incided in CCD chip, avoids superlaser to the damage of CCD chip;
3, the image planes of CCD chip and target chamber center arrange relative to described absorption mirror conjugation by the present invention, realize coaxially demarcating, the actual conditions of two laser when the spacing of two focal spots obtained from CCD chip and size can reflect target practice.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention;
In figure: 1-projection catoptron, 2-condenser lens, 3-absorb catoptron, 4-optical filter, 5-CCD chip, 6-target chamber, 7-simulated laser, 8-by Calibration of Laser.
Embodiment
Technical scheme of the present invention is understood better in order to make those skilled in the art; below in conjunction with accompanying drawing of the present invention; clear, complete description is carried out to technical scheme of the present invention; based on the embodiment in the application; other roughly the same embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all should belong to the scope of the application's protection.
Embodiment one:
As shown in Figure 1, a kind of coaxial calibration sensor, the direction along Laser Transmission comprises successively: absorb catoptron 3, optical filter 4 and CCD chip 5, and before coaxial calibration sensor, laser is also successively through projection catoptron 1 and condenser lens 2.Because laser is multi beam, so projection catoptron 1 wherein, condenser lens 2 can be multiple, absorb catoptron 3 and be designed to hollow circular, described absorption catoptron 3 is to by the glass of the basic frequency laser in Calibration of Laser 8 and two double-frequency laser hypersorptions, described absorption catoptron 3 surface is coated with by the frequency tripled laser high-reflecting film of Calibration of Laser 8, be more than 95% to the reflectivity of frequency tripled laser, basic frequency laser and two double-frequency laser reflectivity are about 4% simultaneously, described optical filter 4 is the glass to being partially absorbed by the frequency tripled laser of Calibration of Laser 8, the transmitance of described optical filter 4 pairs of frequency tripled lasers is 50%, basic frequency laser and two double-frequency lasers of optical filter 4 are reflexed on a small quantity by absorption catoptron 3, filter plate 4 absorbs again, reach the object of complete filtering basic frequency laser and two double-frequency lasers.If not by basic frequency laser and two double-frequency laser filterings, CCD chip 5 can occur the focal spot of basic frequency laser, two double-frequency lasers and frequency tripled laser simultaneously, only has frequency tripled laser for the target practice of inertial confinement fusion, therefore, the focal spot of basic frequency laser and two double-frequency lasers can have a strong impact on the testing result of CCD chip 5.Simultaneously, all higher by Calibration of Laser 8 energy for what practice shooting, if be directly used in demarcation, may exceed the damage threshold of CCD chip 5, cause the damage of CCD chip 5, therefore the present invention utilizes and absorbs catoptron 3 absorption base frequency laser and two double-frequency lasers, both removals are on the impact of final detection result, utilize optical filter 4 to partially absorb frequency tripled laser, to reduce by the energy of Calibration of Laser 8, avoid CCD chip 5 to damage.The transmitance that the present invention chooses optical filter 4 pairs of frequency tripled lasers is 50%, and namely focus on frequency tripled laser energy in CCD chip 5 and be about 0.5 micro-Jiao, CCD chip 5 can process the laser facula of this energy level.The transmitance of optical filter 4 pairs of frequency tripled lasers to be 50% be because: if transmitance is too low, then through frequency tripled laser less, in CCD chip 5, imaging effect is poor, causes the problems such as hot spot obscure boundary Chu; If transmitance is too high, when frequency tripled laser occurs that accidental energy is higher, CCD chip 5 will be damaged.Utilize the image planes of described CCD chip 5 and the center of target chamber 6 relative to described absorption catoptron 3 conjugation, namely the image plane center of CCD chip 5 and the line at target chamber 6 center are perpendicular to absorbing catoptron 3, and the mid point of its line is positioned at and absorbs on catoptron 3, this conjugation arranges and can realize accurate coaxial demarcation, the actual conditions of two laser when the spacing of two focal spots obtained from CCD chip 5 and size can reflect target practice, simplify adjustment process, avoid the troublesome calculation in adjustment process.
Optical filter 4 is arranged on and absorbs between catoptron 3 and CCD chip 5 by the present invention, the object of such setting is: by Calibration of Laser 8 after condenser lens 2, beam size from large to small, optical filter 4 is arranged on and absorbs between catoptron 3 and CCD chip 5, optical filter 4 not only can realize absorbing by the effect of Calibration of Laser 8, obviously can also reduce the bore of optical filter 4, reduce costs, simplify the installation process of optical filter 4.
Optical filter 4 adopts ZWB2 material, and thickness is 3-4mm, and the face depth of parallelism is less than 5 ", the PV value of surface precision is less than λ/5, and λ is by the wavelength of Calibration of Laser 8.Optical filter 4 is by being adhesive on bearing, and bearing is connected by the shell of screw with CCD chip 4, is convenient to remove and change.Absorb catoptron 3 and select ZWB2 glass, absorb the external diameter 196mm of catoptron 3, internal diameter 34mm, thickness 8mm, the PV value of surface precision is less than λ/5.
Separately, the present invention also provides a kind of method utilizing above-mentioned coaxial calibration sensor to carry out laser calibration, comprise: being incided by Calibration of Laser 8 after projection catoptron 1 and condenser lens 2 absorbs catoptron 3, absorb catoptron 3 to by the basic frequency laser in Calibration of Laser 8 and two double-frequency laser hypersorptions, frequency tripled laser high-reflecting film is coated with owing to absorbing catoptron 3 surface, therefore absorb catoptron 3 and frequency tripled laser is reflexed to optical filter 4, a small amount of basic frequency laser and two double-frequency lasers are also reflected onto optical filter 4 simultaneously, optical filter 4 pairs of frequency tripled lasers partially absorb, after basic frequency laser and two double-frequency lasers are all absorbed, remaining frequency tripled laser is incident to CCD chip 5, CCD chip 5 gathers the focal spot of frequency tripled laser, then the focal spot of simulated laser 7 is gathered, calculate by the coaxial deviation of Calibration of Laser 8 with simulated laser 7 by the position deviation measured between the two, adjustment simulated laser 7 points to, it is made to overlap with by Calibration of Laser 8 focal spot position, thus it is accurately coaxial to realize by Calibration of Laser 8 and simulated laser 7.Meanwhile, by regulating simulated laser source matched lenses to make its focal spot size identical with by Calibration of Laser 8, thus to realize and by the same corrugated of Calibration of Laser 8.
Utilize sensor of the present invention and scaling method, achieve the accurately coaxial and same corrugated by Calibration of Laser and simulated laser, coaxial precision in 1 pixel (being equivalent to 4 microns) error range, with corrugated precision in 4 micrometer ranges.
In addition, be to be understood that, although this instructions is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should by instructions integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (6)
1. a coaxial calibration sensor, it is characterized in that, direction along Laser Transmission comprises successively: absorb catoptron, optical filter and CCD chip, described absorption catoptron is the glass to basic frequency laser and two double-frequency laser hypersorptions, described absorption mirror surface is coated with frequency tripled laser high-reflecting film, and described optical filter is the glass partially absorbed frequency tripled laser.
2. coaxial calibration sensor according to claim 1, is characterized in that, the image planes of described CCD chip and target chamber center are relative to described absorption mirror conjugation.
3. coaxial calibration sensor according to claim 1, is characterized in that, described optical filter is 50% to the transmitance of frequency tripled laser.
4., according to the arbitrary described coaxial calibration sensor of claim 1-3, it is characterized in that, the thickness of described optical filter is 3-4mm.
5. the method utilizing the arbitrary described coaxial calibration sensor of claim 1-4 to carry out laser calibration, it is characterized in that, comprise: after condenser lens, incided absorption catoptron by Calibration of Laser, absorb catoptron to absorb by the basic frequency laser in Calibration of Laser and two double-frequency lasers, and frequency tripled laser is reflexed to optical filter, after optical filter partially absorbs frequency tripled laser, remaining frequency tripled laser is incident to CCD chip, CCD chip gathers the focal spot of frequency tripled laser, then the focal spot of simulated laser is gathered, simulated laser is adjusted by the position deviation between Calibration of Laser and simulated laser by calculating.
6. method of carrying out laser calibration according to claim 5, is characterized in that, described optical filter is 50% to the transmitance of frequency tripled laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511008670.9A CN105423922B (en) | 2015-12-29 | 2015-12-29 | A kind of coaxial calibration sensor and its method for carrying out laser calibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511008670.9A CN105423922B (en) | 2015-12-29 | 2015-12-29 | A kind of coaxial calibration sensor and its method for carrying out laser calibration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105423922A true CN105423922A (en) | 2016-03-23 |
| CN105423922B CN105423922B (en) | 2019-03-15 |
Family
ID=55502303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511008670.9A Active CN105423922B (en) | 2015-12-29 | 2015-12-29 | A kind of coaxial calibration sensor and its method for carrying out laser calibration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105423922B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1194524A (en) * | 1997-09-18 | 1999-04-09 | Railway Technical Res Inst | Method for measuring height of trolley line |
| CN101436753A (en) * | 2008-12-26 | 2009-05-20 | 北京工业大学 | Laser cavity external frequency multiplication system |
| CN102944302A (en) * | 2012-11-12 | 2013-02-27 | 中国科学院西安光学精密机械研究所 | Laser focal spot light intensity distribution testing device and testing method |
| CN104121805A (en) * | 2014-07-15 | 2014-10-29 | 南京理工大学 | Target lane space benchmark device and adjusting method thereof |
| CN104764588A (en) * | 2015-03-31 | 2015-07-08 | 中国科学院西安光学精密机械研究所 | Single-pulse laser dynamic focal spot position measuring device and measuring method |
| CN205448960U (en) * | 2015-12-29 | 2016-08-10 | 中国工程物理研究院激光聚变研究中心 | Coaxial demarcation sensor |
-
2015
- 2015-12-29 CN CN201511008670.9A patent/CN105423922B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1194524A (en) * | 1997-09-18 | 1999-04-09 | Railway Technical Res Inst | Method for measuring height of trolley line |
| CN101436753A (en) * | 2008-12-26 | 2009-05-20 | 北京工业大学 | Laser cavity external frequency multiplication system |
| CN102944302A (en) * | 2012-11-12 | 2013-02-27 | 中国科学院西安光学精密机械研究所 | Laser focal spot light intensity distribution testing device and testing method |
| CN104121805A (en) * | 2014-07-15 | 2014-10-29 | 南京理工大学 | Target lane space benchmark device and adjusting method thereof |
| CN104764588A (en) * | 2015-03-31 | 2015-07-08 | 中国科学院西安光学精密机械研究所 | Single-pulse laser dynamic focal spot position measuring device and measuring method |
| CN205448960U (en) * | 2015-12-29 | 2016-08-10 | 中国工程物理研究院激光聚变研究中心 | Coaxial demarcation sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105423922B (en) | 2019-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104865576B (en) | A kind of compact ultra-short pulse laser long-distance ranging system and its distance-finding method | |
| CN102564611B (en) | High-power laser wave front measuring instrument and wave front measuring method | |
| CN102707331B (en) | Receiving and transmitting integrated sub-nanosecond pulse laser detection system based on polarization | |
| CN103633557A (en) | Collimating and beam expanding device for semiconductor laser sources of laser radar | |
| CN107884079B (en) | Single-shot ultrashort laser pulse width measuring device and measuring method | |
| CN103862166B (en) | A kind of defining method of laser beam focal plane | |
| CN106443954A (en) | Optical axis debugging system and method of laser range finder | |
| CN112596230B (en) | Light path system for photoelectric tracking active chromatographic illumination | |
| CN108549157A (en) | A kind of high magnification beam-expanding system of laser beam | |
| CN103869462A (en) | Device for carrying out splicing mirror common-phase control by utilizing cavity ring-down technology | |
| CN104991258A (en) | Infrared laser light uniformizing illumination detecting system | |
| CN103411932A (en) | LIBS testing system and method based on remote zoom optical multiplexing | |
| CN104317065A (en) | Laser collimating optical system | |
| CN104020566A (en) | Two-dimensional large-scale laser beam array duty ratio adjusting device | |
| CN105573041A (en) | Method and device for realizing automatic focusing of projector, and projector | |
| CN112276345A (en) | Laser processing system and method for monitoring laser power change | |
| CN104977665A (en) | Laser and optical fiber coupler and coupling method | |
| CN103499871A (en) | Superachromatic optical system used for measuring divergence angle of laser beams | |
| CN101358898A (en) | Device and method for measuring focal length of positive thermal lens of laser bar | |
| US11520173B2 (en) | Transmission type adaptive optical system | |
| CN204705715U (en) | A kind of compact ultra-short pulse laser long-distance ranging system | |
| CN205448960U (en) | Coaxial demarcation sensor | |
| CN105445857B (en) | A kind of space filtering isolator | |
| CN103364897A (en) | Lens system for coupling single mode lasers | |
| CN203275776U (en) | Device for realizing laser beam long distance precise focusing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |