CN102486405B - Schlieren device used for test on high power laser far-field focal spot - Google Patents

Schlieren device used for test on high power laser far-field focal spot Download PDF

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Publication number
CN102486405B
CN102486405B CN201010568941.7A CN201010568941A CN102486405B CN 102486405 B CN102486405 B CN 102486405B CN 201010568941 A CN201010568941 A CN 201010568941A CN 102486405 B CN102486405 B CN 102486405B
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CN
China
Prior art keywords
compressing tablet
power laser
light barrier
glass compressing
schlieren
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CN201010568941.7A
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Chinese (zh)
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CN102486405A (en
Inventor
达争尚
李红光
董晓娜
孙策
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中国科学院西安光学精密机械研究所
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Priority to CN201010568941.7A priority Critical patent/CN102486405B/en
Publication of CN102486405A publication Critical patent/CN102486405A/en
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Publication of CN102486405B publication Critical patent/CN102486405B/en

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Abstract

The invention relates to a schlieren device used for a test on a high power laser far-field focal spot. The device comprises a light blocking sheet and a light transmission cover that is arranged outside the light blocking sheet. According to the invention, the schlieren device used for a test on a high power laser far-field focal spot is provided. The device has a good light blocking effect and a laser irradiation resistant performance; and there is no influence on measurement.

Description

Schlieren device for testing far-field focus faculae of high-power laser

Technical field

The invention belongs to optical field, relate to a kind of schlieren device, relate in particular to a kind of Schlieren device for testing far-field focus faculae of high-power laser.

Background technology

Far-field focus is an important indicator that characterizes high power laser system beam quality, is also the parameter directly perceived of weighing laser target shooting focal spot intensity distribution, especially needs to pay close attention to size and the energy distribution thereof of the other pigtail of focal spot, need to be measured accurately.Wide dynamic range (more than 10000: 1) due to far-field focus, still the survey sensor that there is no great dynamic range like this, a kind of method that focal spot is measured is to measure respectively main lobe and the secondary lobe of focal spot, by Image Reconstruction, obtain complete focused spot, this method is referred to as schlieren method, as shown in Figure 1.When measuring secondary lobe, main lobe need to be blocked, otherwise can cause the damage of image sensor, the device that blocks main pigtail is schlieren device, to the requirement of this device be in the light tight, resistance to laser irradiation, can not cause added influence to measuring, not yet have such device to occur at present.

Summary of the invention

In order to solve the above-mentioned technical matters existing in background technology, the invention provides a kind of be in the light effective, resistance to laser irradiation and can be to measuring the Schlieren device for testing far-field focus faculae of high-power laser have any impact.

Technical solution of the present invention is: the invention provides a kind of Schlieren device for testing far-field focus faculae of high-power laser, its special character is: the diffuser that described Schlieren device for testing far-field focus faculae of high-power laser comprises light barrier and is arranged at light barrier outside.

Above-mentioned diffuser comprises upper glass compressing tablet and the lower-glass compressing tablet snapping together with upper glass compressing tablet.

Above-mentioned diffuser also comprises seal, and described upper glass compressing tablet and lower-glass compressing tablet seal by seal after fastening.

Above-mentioned light barrier is that transmitance is not more than 10 -5and resistance to irradiation threshold value is not less than 20J/cm 2light barrier.

Above-mentioned light barrier is sheet metal.

Above-mentioned light barrier is that thickness is the steel disc of 0.1mm~0.3mm.

Above-mentioned light barrier is that thickness is the steel disc of 0.2mm.

On above-mentioned diffuser, be coated with anti-reflection film.

The thickness of above-mentioned upper glass compressing tablet or lower-glass compressing tablet is 0.3mm~1mm.

The thickness of above-mentioned upper glass compressing tablet or lower-glass compressing tablet is 0.5mm.

Advantage of the present invention is:

The material of Schlieren device for testing far-field focus faculae of high-power laser provided by the present invention adopts sheet metal, especially stalloy; In the encapsulation of light barrier, adopt thin glass sheet, meanwhile, adopt silica gel light barrier be encapsulated in the glass sheet of clamping up and down and be coated with anti-reflection film on upper and lower packaged glass sheet, can damage device and sealing reliable, can not have any impact to measuring.The formed schlieren device of the present invention can block the main pigtail of laser, also can make the other pigtail of laser see through; Have the tight and resistance to laser irradiation of being in the light, and be easily processed into the advantages such as size and shape that need, the schlieren device forming after overall package is convenient to clamping installation, is equal to the installation of glass elements.

Accompanying drawing explanation

Fig. 1 is the light path schematic diagram of schlieren method when use procedure in prior art;

Fig. 2 is light barrier structural representation provided by the present invention;

Fig. 3 is the structural representation of schlieren device provided by the present invention;

Fig. 4 is that the A of Fig. 3 is to view.

Embodiment

Referring to Fig. 2, Fig. 3 and Fig. 4, the invention provides a kind of Schlieren device for testing far-field focus faculae of high-power laser, its one-piece construction is shaped as circle, comprises that light barrier 1, upper glass compressing tablet 2, lower-glass compressing tablet 3, silica gel form.

This upper glass compressing tablet 2 and lower-glass compressing tablet 3 form diffuser, together with upper glass compressing tablet 2 fastens with lower-glass compressing tablet 3, diffuser is arranged on the outside of light barrier 1, for result of use better, after fastening at upper glass compressing tablet 2 and with lower-glass compressing tablet 3, by seal 4, seal, the seal 4 can be silica gel, glass cement etc.

Light barrier 1 can be that transmitance is not more than 10 -5and resistance to irradiation threshold value is not less than 20J/cm 2light barrier, this light barrier 1 can be that sheet metal, especially thickness are the steel disc of 0.1mm~0.3mm, the steel disc that preferably thickness is 0.2mm.

On diffuser, be coated with anti-reflection film, namely the surfaces externally and internally of upper glass compressing tablet 2 and lower-glass compressing tablet 3 is all coated with anti-reflection film, upper glass compressing tablet 2 and lower-glass compressing tablet 3 can be quartz glass, K9 glass etc. any be all feasible.

The thickness of upper glass compressing tablet or lower-glass compressing tablet is 0.3mm~1mm, especially 0.5mm.

Specific implementation, light barrier 1 adopts thin tool steel sheet material, and thickness is 0.2mm, and its shape and size form according to the actual small processing technology of laser that need to adopt being in the light;

The material of upper and lower glass preform 2,3 is selected according to tested optical maser wavelength, all surface of glass preform is plated the anti-reflection film of testing laser, to obtain laser transmittance as much as possible simultaneously; The thickness of glass preform is chosen as 0.5mm, and size is φ 20mm;

Light barrier 1 is placed between upper and lower glass preform 2,3, and adopts the upper and lower pressure holding of specific purpose tool so that it is fixed;

Adopt silica gel to smear upper and lower glass preform gap all round, adopt the dry rear pulling force forming of glue that light barrier 1 is encapsulated in glass preform;

Maintain more than 24 hours, after glue is dry, formed schlieren device, during test, adopt the method for clamping glass element that schlieren device is fixed in light path and is tested.

Claims (4)

1. a Schlieren device for testing far-field focus faculae of high-power laser, is characterized in that: the diffuser that described Schlieren device for testing far-field focus faculae of high-power laser comprises light barrier and is arranged at light barrier outside; Described diffuser comprises upper glass compressing tablet, seal and the lower-glass compressing tablet snapping together with upper glass compressing tablet; Described upper glass compressing tablet and lower-glass compressing tablet seal by seal after fastening; The thickness of described upper glass compressing tablet or lower-glass compressing tablet is 0.3mm~1mm; Described light barrier is that thickness is the steel disc of 0.1mm~0.3mm; On diffuser, be coated with anti-reflection film.
2. Schlieren device for testing far-field focus faculae of high-power laser according to claim 1, is characterized in that: described light barrier is that transmitance is not more than 10 -5and resistance to irradiation threshold value is not less than 20J/cm 2light barrier.
3. Schlieren device for testing far-field focus faculae of high-power laser according to claim 2, is characterized in that: described light barrier is that thickness is the steel disc of 0.2mm.
4. Schlieren device for testing far-field focus faculae of high-power laser according to claim 3, is characterized in that: the thickness of described upper glass compressing tablet or lower-glass compressing tablet is 0.5mm.
CN201010568941.7A 2010-12-01 2010-12-01 Schlieren device used for test on high power laser far-field focal spot CN102486405B (en)

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CN102486405B true CN102486405B (en) 2014-03-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107315010A (en) * 2017-08-15 2017-11-03 合肥工业大学 A kind of lightweight schlieren

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103033261B (en) * 2012-12-26 2014-12-17 中国科学院上海光学精密机械研究所 On-line detection method of focal spot energy distribution

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101274391A (en) * 2007-03-28 2008-10-01 日立比亚机械股份有限公司 Laser energy measuring unit and laser machining apparatus
CN101556378A (en) * 2009-04-23 2009-10-14 杭州数腾科技有限公司 Parallel dense multichannel acousto-optical modulating device
CN201897502U (en) * 2010-12-01 2011-07-13 中国科学院西安光学精密机械研究所 Schlieren device for testing far-field focus faculae of high-power laser

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101274391A (en) * 2007-03-28 2008-10-01 日立比亚机械股份有限公司 Laser energy measuring unit and laser machining apparatus
CN101556378A (en) * 2009-04-23 2009-10-14 杭州数腾科技有限公司 Parallel dense multichannel acousto-optical modulating device
CN201897502U (en) * 2010-12-01 2011-07-13 中国科学院西安光学精密机械研究所 Schlieren device for testing far-field focus faculae of high-power laser

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107315010A (en) * 2017-08-15 2017-11-03 合肥工业大学 A kind of lightweight schlieren

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