CN102519587A - Simple device for instantly measuring light intensity distribution of laser beams - Google Patents
Simple device for instantly measuring light intensity distribution of laser beams Download PDFInfo
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- CN102519587A CN102519587A CN2011104529542A CN201110452954A CN102519587A CN 102519587 A CN102519587 A CN 102519587A CN 2011104529542 A CN2011104529542 A CN 2011104529542A CN 201110452954 A CN201110452954 A CN 201110452954A CN 102519587 A CN102519587 A CN 102519587A
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Abstract
The invention relates to a technology for measuring the light intensity of laser beams, particularly to a simple device for instantly measuring the light intensity distribution of the laser beams, and solves the problems that the conventional technology for measuring the light intensity of the laser beams cannot be used for instantly measuring the horizontal light intensity distribution of the laser beams, is not flexible in measurement and is complicated in operation. The simple device for instantly measuring the light intensity distribution of the laser beams includes an electrodynamic loudspeaker, a focusing lens, a photodetector, a BNC connecting wire, an integrating circuit and a digital oscilloscope, wherein the electrodynamic loudspeaker includes a pillar, a permanent magnet, a damping material layer, a coil, a black shading plate, a top cover and coil connecting wires; and the lower end surface of the permanent magnet is fixed at the upper end surface of the pillar. The simple device provided by the invention effectively solves the problems that the conventional technology for measuring the light intensity of the laser beams cannot be used for instantly measuring the horizontal light intensity distribution of the laser beams, is not flexible in measurement and is complicated in operation, and is applicable to the instant measurement of light intensity distribution of cross sections of the laser beams.
Description
Technical field
The present invention relates to the measuring technique of laser beam light intensity, specifically is a kind of easy device of quick measuring laser beam light distribution.
Background technology
After laser instrument is born, laser as a kind of high brightness, directivity, monochromaticity and coherence all well light source be widely used in scientific research, measurement, processing, medical treatment, communicated by letter and field such as military affairs.In these were used, the horizontal light distribution (being the distribution of light intensity on the xsect vertical with direction of beam propagation) of laser beam received people's attention as important techniques performance index estimating laser beam quality always.Theoretical according to confocal resonator, the light beam of the general output of laser instrument is rendered as Gaussian on the xsect vertical with the direction of propagation.Yet because the resonator cavity form that adopts in the actual laser is varied, the laser beam that can obtain laser instrument output varies.On the laser developing history, the personnel of different specialties have proposed different requirement according to different purpose separately to the optical quality of gauss laser beam.In order to satisfy the demand of each side, must know the curve of light distribution of laser beam on lateral cross section.
Up to the present, people have been developed the light distribution that many technology are come measuring laser beam, like the aperture sonde method, and CCD method and knife-edge method.Wherein, the aperture sonde method is owing to experimentally be difficult to accomplish that hole and laser beam are concentric, thereby precision is difficult to guarantee when photometry bundle spot size, and can not directly obtain the distribution curve of light intensity during the measurement light intensity soon.Though CCD method precision is high, only be fit to survey the size of low power optical beam hot spot, tangible limitation is arranged, and can not reflect intensity variations quantitatively.At present, knife-edge method is widely used in measuring the distribution of Gaussian beam light intensity.Knife-edge method normally is fixed on blade on the optical translation platform; Can the edge direction vertical cut light beam with direction of beam propagation; But need slowly to regulate repeatedly to measure the laser power that sees through knife-edge, therefore can not obtain the curve of light distribution of laser beam apace through translation stage.For the foregoing reasons; Be necessary to invent a kind of can be fast, the easy device of measuring laser beam xsect light distribution accurately, flexibly, with solve existing laser beam luminous intensity measurement technology can't be fast to laser beam horizontal light distribution measure, measure the problem of dumb and complex operation.
Summary of the invention
The present invention for solve existing laser beam luminous intensity measurement technology can't be fast to laser beam horizontal light distribution measure, measure the problem of dumb and complex operation, a kind of easy device of quick measuring laser beam light distribution is provided.
The present invention adopts following technical scheme to realize: the easy device of quick measuring laser beam light distribution comprises D.sp., condenser lens, photodetector, BNC connecting line, integrating circuit and digital oscilloscope; Said D.sp. comprises pillar, permanent magnet, damping material layer, coil, black shadow shield, top cover and coil connecting line; The pillar upper surface is fixed in the lower surface of permanent magnet; The damping material layer is fixed in the upper surface of permanent magnet; Coil is socketed on the middle part of permanent magnet; Black shadow shield vertical fixing is in the coil upper end face; Top cover is fixed in damping material layer upper surface; The coil connecting line is connected in the coil two ends; Photodetector is positioned on the condenser lens rear side focus; The output terminal of photodetector is connected with the input end of integrating circuit through the BNC connecting line; The output terminal of integrating circuit is connected with the input end of digital oscilloscope; The black shadow shield is positioned at the condenser lens front side.
During work, the laser beam line focus lens of laser instrument output are converged to a very thin some light beam, and the photodetector that the some light beam is positioned on the condenser lens rear side focus is fully collected.Photodetector converts the light signal that is detected into electric signal, and electric signal inserts integrating circuit through the BNC connecting line and carries out integral processing, and the electric signal after the integral processing is linked digital oscilloscope and shown.During concrete work, pass to the electric current of proper orientation, can know that by Faraday's electromagnetic induction law coil is fast vibration up and down to the coil of D.sp..Meanwhile, black shadow shield fly-cutting laser beam upwards under the drive of coil.The light intensity of laser beam changes with mobile can the generation of black shadow shield fast.After assembling, the laser beam line focus lens that this light intensity changes collected and convert into electric signal by photodetector fully.The electric signal of photodetector output is the fast varied curve of diverse location place light intensity on the beam cross-section, and the electric signal after integrating circuit is handled then is the distribution curve of light intensity.Thus, the easy device of quick measuring laser beam light distribution of the present invention has promptly realized carrying out fast, measuring accurately, flexibly to the light distribution of laser beam xsect.In said process, top cover plays the effect that limiting coil moves upward.The damping material layer then can reduce the influence of coil vibration to measuring process, and increases the service efficiency and the life-span of D.sp..Based on said process; With existing laser beam luminous intensity measurement compared with techniques; The easy device of quick measuring laser beam light distribution of the present invention has realized that fast horizontal light distribution is measured to laser beam, and its measurement simultaneously is more flexible, operates simpler.
Further, also comprise cavity; Have on the cavity with the condenser lens forward position over against through hole; D.sp., condenser lens, photodetector, BNC connecting line, integrating circuit, digital oscilloscope all are positioned at cavity; The black shadow shield is between through hole and condenser lens front side.During work, the through hole arrival condenser lens that the laser beam of laser instrument output passes on the cavity is assembled, and the photodetector that is positioned at last on the collector lens focus is collected detection.
The present invention efficiently solve existing laser beam luminous intensity measurement technology can't be fast to laser beam horizontal light distribution measure, measure the problem of dumb and complex operation, be applicable to that light distribution is measured fast to the laser beam xsect.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: 1-condenser lens, 2-photodetector, 3-BNC connecting line, 4-integrating circuit, 5-digital oscilloscope, 6-pillar, 7-permanent magnet, 8-damping material layer, 9-coil, 10-black shadow shield, 11-top cover, 12-coil connecting line, 13-cavity, 14-through hole.
Embodiment
The easy device of measuring laser beam light distribution comprises D.sp., condenser lens 1, photodetector 2, BNC connecting line 3, integrating circuit 4 and digital oscilloscope 5 fast;
Said D.sp. comprises pillar 6, permanent magnet 7, damping material layer 8, coil 9, black shadow shield 10, top cover 11 and coil connecting line 12; Pillar 6 upper surfaces are fixed in the lower surface of permanent magnet 7; Damping material layer 8 is fixed in the upper surface of permanent magnet 7; Coil 9 is socketed on the middle part of permanent magnet 7; Black shadow shield 10 vertical fixing are in coil 9 upper surfaces; Top cover 11 is fixed in damping material layer 8 upper surface; Coil connecting line 12 is connected in coil 9 two ends;
Photodetector 2 is positioned on the condenser lens 1 rear side focus; The output terminal of photodetector 2 is connected with the input end of integrating circuit 4 through BNC connecting line 3; The output terminal of integrating circuit 4 is connected with the input end of digital oscilloscope 5; Black shadow shield 10 is positioned at condenser lens 1 front side;
Also comprise cavity 13; Have on the cavity 13 with condenser lens 1 forward position over against through hole 14; D.sp., condenser lens 1, photodetector 2, BNC connecting line 3, integrating circuit 4, digital oscilloscope 5 all are positioned at cavity 13; Black shadow shield 10 is between through hole 14 and condenser lens 1 front side.
Claims (2)
1. the easy device of a quick measuring laser beam light distribution is characterized in that: comprise D.sp., condenser lens (1), photodetector (2), BNC connecting line (3), integrating circuit (4) and digital oscilloscope (5);
Said D.sp. comprises pillar (6), permanent magnet (7), damping material layer (8), coil (9), black shadow shield (10), top cover (11) and coil connecting line (12); Pillar (6) upper surface is fixed in the lower surface of permanent magnet (7); Damping material layer (8) is fixed in the upper surface of permanent magnet (7); Coil (9) is socketed on the middle part of permanent magnet (7); Black shadow shield (10) vertical fixing is in coil (9) upper surface; Top cover (11) is fixed in damping material layer (8) upper surface; Coil connecting line (12) is connected in coil (9) two ends;
Photodetector (2) is positioned on condenser lens (1) the rear side focus; The output terminal of photodetector (2) is connected with the input end of integrating circuit (4) through BNC connecting line (3); The output terminal of integrating circuit (4) is connected with the input end of digital oscilloscope (5); Black shadow shield (10) is positioned at condenser lens (1) front side.
2. the easy device of quick measuring laser beam light distribution according to claim 1 is characterized in that: also comprise cavity (13); Have on the cavity (13) with condenser lens (1) forward position over against through hole (14); D.sp., condenser lens (1), photodetector (2), BNC connecting line (3), integrating circuit (4), digital oscilloscope (5) all are positioned at cavity (13); Black shadow shield (10) is positioned between through hole (14) and condenser lens (1) front side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110452954.2A CN102519587B (en) | 2011-12-30 | 2011-12-30 | Device for measuring light intensity distribution of laser beams |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110452954.2A CN102519587B (en) | 2011-12-30 | 2011-12-30 | Device for measuring light intensity distribution of laser beams |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102519587A true CN102519587A (en) | 2012-06-27 |
| CN102519587B CN102519587B (en) | 2014-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110452954.2A Expired - Fee Related CN102519587B (en) | 2011-12-30 | 2011-12-30 | Device for measuring light intensity distribution of laser beams |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644067A (en) * | 2016-12-26 | 2017-05-10 | 深圳市华星光电技术有限公司 | Light trap fixing device |
| CN106768399A (en) * | 2016-12-07 | 2017-05-31 | 武汉纺织大学 | Rectangular laser spot energy distribution rapid detection system and method |
| CN108088557A (en) * | 2018-01-17 | 2018-05-29 | 南京先进激光技术研究院 | A kind of mid-infrared laser beam analysis device |
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- 2011-12-30 CN CN201110452954.2A patent/CN102519587B/en not_active Expired - Fee Related
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| US5459565A (en) * | 1993-08-20 | 1995-10-17 | Duma Optronics, Ltd. | Laser beam analyzer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106768399A (en) * | 2016-12-07 | 2017-05-31 | 武汉纺织大学 | Rectangular laser spot energy distribution rapid detection system and method |
| CN106644067A (en) * | 2016-12-26 | 2017-05-10 | 深圳市华星光电技术有限公司 | Light trap fixing device |
| CN106644067B (en) * | 2016-12-26 | 2018-07-03 | 深圳市华星光电技术有限公司 | Light trapping fixing device |
| CN108088557A (en) * | 2018-01-17 | 2018-05-29 | 南京先进激光技术研究院 | A kind of mid-infrared laser beam analysis device |
| CN108088557B (en) * | 2018-01-17 | 2023-12-05 | 南京先进激光技术研究院 | Mid-infrared laser beam analysis device |
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| Publication number | Publication date |
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| CN102519587B (en) | 2014-03-05 |
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Granted publication date: 20140305 Termination date: 20191230 |