Apparatus for measuring parallelity of laser beam

A technology for measuring laser and parallelism, applied in the laser field, can solve the problems of large measurement influence, expensive interferometer, and large volume of the interferometer, and achieve the effects of low cost, fast measurement, and small size of the instrument

Inactive Publication Date: 2006-02-08
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0004] 1) The interferometer is expensive;
[0005] 2) Generally, the interferometer has a large volume and is inconvenient t

Method used

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  • Apparatus for measuring parallelity of laser beam
  • Apparatus for measuring parallelity of laser beam
  • Apparatus for measuring parallelity of laser beam

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with drawings and embodiments.

[0030] see first figure 1 , figure 1 It is a structural schematic diagram of an embodiment of the device for measuring the parallelism of laser beams in the present invention. As can be seen from the figure, the composition of the device for measuring laser beam parallelism in the present invention is: a diaphragm 2, a converging lens 3, a half-mirror 4, a first cylindrical lens 5, and the first four-quadrant detection are arranged successively on the same optical axis. Device 7, in the reflected light direction of the half mirror 4, that is, the direction perpendicular to the optical axis is followed by the second cylindrical lens 6, the second four-quadrant detector 8, the first cylindrical lens 5 and the second cylindrical lens 6 are symmetrical about the splitting surface of the half mirror 4, and the signal output terminals of the first four-quadrant detector 7 a...

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Abstract

The invention relates to an apparatus for measuring parallel of laser beam, which adopts the tested light beam, diaphragm, a convergence lens, a semi-transmitting reflector, two column lenses, two four-quadrant detectors and a computer to form the measuring apparatus; it also adopts a convergence lens a semi-transmitting reflector, two column lenses, two four-quadrant detectors to form light beam parallel detector; it does light beam parallel detecting based on image diffusion focusing error detecting. It adopts differential method to eliminate the detecting error from the incidence light off-axis. It can own any sensitivity and linear range by designing the optical system; especially be suit for detecting the light caliber with high quality, and the laser beam with small diffusing angle and rotational symmetry.

Description

technical field [0001] The invention belongs to laser technology and is a device for measuring the parallelism of laser beams. It is mainly used in the detection of the divergence angle of the collimated laser beam and the measurement of the divergence angle of the small divergence angle and rotationally symmetrical laser beam. Background technique [0002] Laser collimator for measuring the coaxiality of large mechanical holes and shafting and the straightness, flatness and parallelism of the plane, laser range finder, laser atmospheric monitoring and wireless optical communication, all need collimated laser beams , the parallelism of the laser beam has a great influence on the performance of the measuring instrument and the communication quality. Therefore, the application range of the detection of the parallelism of the collimated laser beam is relatively large. The parallelism of the collimated laser beam is measured by the far-field divergence angle of the beam. [0...

Claims

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Application Information

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IPC IPC(8): G01B21/22G01B11/26
Inventor 朱青徐文东高秀敏张锋杨金涛戴珂
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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