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Phase shift detection head of laser speckle and application

A phase shift detection and laser speckle technology, which is applied in the measurement of phase influence characteristics, optical testing flaws/defects, optics, etc., can solve the problems of inconvenient direct judgment of product defects, and the display of laser speckle detection head is not obvious and intuitive. To achieve the effect of direct and easy judgment, conducive to direct judgment, and compact layout

Inactive Publication Date: 2007-12-26
GUANGZHOU SCUT BESTRY TECHNOLOGY CO LTD
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Problems solved by technology

[0003] However, in the actual industrial application of the laser speckle detection head, it is found that the display of the detection results is not obvious and intuitive enough, and it is not convenient for direct judgment of product defects

Method used

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  • Phase shift detection head of laser speckle and application

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Embodiment 2

[0017] The laser shearing speckle phase-shift detection head is applied to tire defect detection: the semiconductor laser 8 emits a laser beam, which is expanded by the beam expander 7 connected to the semiconductor laser 8, so that the laser beam is expanded from a small spot to a beam larger than 60 The light cone above ° makes the tire area of ​​the detected object larger, and the laser light distribution on the laser irradiation surface is uniform, so that the incident light irradiates the measured object and is reflected, and passes through the optical lens 1, the liquid crystal phase shifter 2, and the shearing mirror 3. The polarizing plate 4 and the imaging lens 5 are imaged on the photoelectric converter CCD6, and the result is displayed on the computer screen after image processing.

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Abstract

A phase shift detection head of laser speckle is prepared for fixing semiconductor laser and photoelectric converter on base of detection head in mode of included angle as 2-20degree between their optical axes; arranging expander lens at front-end of semiconductor laser; connecting photoelectric converter and shear lens as well as optical lens to be an integral body; setting liquid crystal phase shifter between optical lens and shear lens and setting polaroid as well as image-transmission lens between shear lens and photoelectric converter; connecting optical lens, liquid crystal phase shifter, shear lens, polaroid, image-transmission lens and photoelectric converter to be an integral body.

Description

technical field [0001] The invention belongs to the technical field of laser detection, and specifically refers to a laser speckle phase-shift detection head and its application. Background technique [0002] At present, the optical system of the laser speckle detection head is mainly a laboratory device, and there are relatively few small and light detection heads. The Chinese invention patent "Laser speckle detection head and its application" with the patent number ZL200410052185.7 discloses a laser speckle detection head, including a detection head casing, a semiconductor laser, a photoelectric converter CCD, an optical lens and a shear mirror , Beam expander, the detection head casing is composed of the detection head side plate, the detection head front window, the detection head upper plate, and the detection head base. The semiconductor laser and the photoelectric converter CCD are fixed on the base of the detection head casing. There is a beam expander in front of t...

Claims

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Application Information

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IPC IPC(8): G01N21/88G01N21/45G02B27/48
Inventor 曾启林谢雷何仕斌翁家雄孙清勇
Owner GUANGZHOU SCUT BESTRY TECHNOLOGY CO LTD