A laser beam shaping device and method based on a spatial light modulator

A spatial light modulator and laser beam technology, which is applied in the field of laser applications, can solve the problems of large diffraction and interference effects, high processing costs, and complex calculations, and achieve the effects of convenient operation, flexible use, and improved beam quality
CN106646895BActive Publication Date: 2019-05-10WUHAN JINDUN LASER TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN JINDUN LASER TECH CO LTD
Publication Date
2019-05-10

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Abstract

The invention discloses a laser beam shaping device and a laser beam shaping method based on a spatial light modulator. The device is composed of a laser, a beam expander, a first reflector, a shutter, a second reflector, the spatial light modulator, a first lens, a diaphragm, a beam splitter, a third reflector, a second lens, a worktable, a third lens, a CCD camera and a computer. According to the laser beam shaping device and the laser beam shaping method, firstly a mask graph is designed according to a target shape requirement, and then the obtained mask graph is loaded on the spatial light modulator. After high-order light which is optically diffracted, an optical 4f system which is composed of the first lens and the second lens transmits an image that is formed by zero-order light in a near field of the spatial light modulator to a to-be-machined surface, and finally the CCD camera is utilized for performing observation. The laser beam shaping device and the laser beam shaping method do not require complicated calculation, thereby saving time. The finally shaped laser beam is a parallel light beam and can be processed at a random position after 3f, thereby overcoming a limitation by depth of field. The laser beam shaping device and the laser beam shaping method can effectively prevent effects of diffraction and interference, thereby improving quality of the light beam.
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Description

technical field

[0001] The present invention relates to the field of laser applications, and relates to a Gaussian laser beam shaping device and method, more specifically, the present invention relates to a laser beam shaping device and method based on a spatial light modulator. Background technique:

[0002] Laser is an important invention with milestone significance in the history of optics and even in the history of technological development. Laser processing is a non-contact processing method, which has the advantages of high energy density, good directionality, high coherence, and small heat-affected zone (reference document: Research on Femtosecond Parallel Processing Method Based on Spatial Light Modulator). Information technology, material processing, test and measurement technology, biotechnology, and national defense industry and other related fields have great application value (reference document: Gaussian beam shaping technology research). An important feature ...

Claims

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