Automatic adjustment and calibration method of beam expanding collimated light beam
A collimated beam and automatic adjustment technology, applied in the field of optical detection, can solve the problem of high cost of shearing plate, and achieve the effect of simple equipment and high adjustment accuracy
Active Publication Date: 2018-09-21
北京文石杰创信息技术有限公司
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Problems solved by technology
It is usually required that the aperture of the shearing plate is 1.5 times the aperture of the collimated beam to be tested. For a collimated beam with an aperture of 50mm, a high-precision and high-uniformity shearing plate with an aperture of 75mm is required. The shearing plate the cost is very high
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[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0022] figure 1 It is a schematic diagram of the x and y direction automatic adjustment system of the beam expansion and collimation beam, combined with figure 1 Free automatic adjustment in x and y directions, the specific implementation method is:
[0023] Step 1, such as figure 1 , the laser beam emitted by the laser passes through the attenuator 2 to adjust the intensity of the laser light, and then the light wave emitted by the beam expander 3, the pinhole filter device 4 and the collimator 5 is a quasi-plane light wave; this step is to use the qualitative observation of the human eye to exp...
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The invention relates to the technical field of optical detection, and specifically relates to an automatic adjustment and calibration method of a beam expanding collimated light beam. The automatic adjustment and calibration method of a beam expanding collimated light beam utilizes an optimization method of received images and automatic control of an electronic control platform to realize automatic adjustment and calibration of a beam expanding collimation system, and the adjustment and calibration precision is relatively higher. The automatic adjustment and calibration method of a beam expanding collimated light beam includes the steps: the laser beam emitted from a laser passes through a beam expanding lens, a filtering device and a collimating mirror, and then the emergent light wave is a quasi-planar light wave; a CCD camera with a lens receives the emergent light wave, and optimizes the received light wave, and then the result is fed back to a three-dimensional electronically controlled translation table; the three-dimensional electronically controlled translation table is adjusted to enable the laser beam to pass through coaxial output of the beam expanding lens, the filtering device and the collimating mirror to realize large diameter uniform output of the laser light wave, and then a Michelson interference device is used to generate equal-thickness interference fringes; and the CCD camera receives the programming optimization process, and the result is fed back to the three-dimensional electronically controlled translation table, and the three-dimensional electronically controlled translation table is adjusted to realize collimated output of the collimated beam of the beam expanding lens, the filtering device and the collimating mirror.
Description
technical field [0001] The invention relates to the technical field of optical detection, in particular to an automatic adjustment method for expanding and collimating beams. Background technique [0002] The laser beam has a certain divergence angle and the spot diameter is small. In the wide-aperture laser optical path detection, the general laser beam passes through the beam expander collimation system to form a collimated beam parallel to the symmetry axis of the collimator mirror. Straightness and spot uniformity affect the performance of the laser, so the collimation and spot uniformity of the collimated beam are important indicators for evaluating the beam performance. [0003] There are mainly the following adjustment methods for beam expansion and collimation of laser beams: [0004] (1) Shack-Hartman method: A lens array is used to divide and sample the collimated beam and then focus it, and calculate the wavefront distribution of the collimated beam according to ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): G02B27/09H01S3/00H01S5/00G05D3/12
CPCG02B27/0927G05D3/12H01S3/0057H01S5/0057
Inventor 段存丽赵鹏程郭荣礼张玉虹刘王云胡小英于佳万文博
Owner 北京文石杰创信息技术有限公司