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Novel flat-topped light beam generating device

A technology of flat-top beam and generating device, which is applied in optics, optical components, nonlinear optics, etc., can solve the problem of low uniformity of aspheric lens group shaping technology, etc.

Inactive Publication Date: 2021-05-18
SOUTH WEST INST OF TECHN PHYSICS
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is how to provide a new type of flat-top beam generating device to solve the problem of low shaping uniformity of the existing aspheric lens group shaping technology

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  • Novel flat-topped light beam generating device

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Embodiment Construction

[0021] In order to make the purpose, content and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] The present invention aims at the shortcomings of the existing aspheric lens group shaping technology that the shaping uniformity is not high, and provides a new type of flat-top beam generating device. Beam uniformity is better than 90%.

[0023] For the above purpose, the present invention discloses a novel flat-hat beam generating device, which includes a laser transmitter (1), a variable magnification beam expander system (2), an aspheric lens group (3), a polarizer ( 4), liquid crystal spatial light modulator (5), analyzer (6), beam splitter (7), beam analyzer (8), control computer (9) and 45° total reflection mirror (10), laser transmitter (1) The output beam reaches the variable beam expander system (2) t...

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Abstract

The invention relates to a novel flat-topped beam generating device, and belongs to the field of laser transmission and control. According to the novel flat-topped light beam generating device of the invention, a flat-topped beam shaping technical approach of combining a liquid crystal spatial light modulator and an aspherical lens group is adopted; the properties of high resolution and high modulation precision of the liquid crystal spatial light modulator are fully utilized, and the uniformity of a output flat-topped beam can be obviously improved through a closed-loop modulation method; moreover, the device has a light intensity uniformity automatic compensation function; in a laser transmission link, the device can carry out automatic compensation and correction for flat-topped light beam uniformity reduction caused by environmental pollution, optical element degradation, light imbalance of an optical structure and the like, so that the device is lower in working environment requirement, longer in service life and higher in quality reliability; in addition, the device can generate laser spots with different light intensity distributions in a modulation range according to needs, can be expanded and applied to other research fields, and is wider in application range.

Description

technical field [0001] The invention belongs to the technical field of laser transmission and control, and in particular relates to a novel flat-top beam generating device. Background technique [0002] Flat-hat beam is a beam with uniform energy distribution on the cross-section. It has been used in the fields of laser material processing and interaction research, optical fiber injection system, optical data and image processing, lithography, thermal processing of laser materials, micro-manipulation, optical biomedicine, etc. Wide range of applications. Shaping the laser output Gaussian beam into a flat-hat beam has always been a research hotspot in the field of light field control. Currently, commonly used shaping techniques include aperture diaphragm shaping, microlens array shaping, binary optical element shaping, and aspheric lens group shaping. [0003] Various shaping techniques have their own advantages and disadvantages, and the aperture method has serious energy l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/09G02F1/13
CPCG02B27/0955G02F1/13
Inventor 张浩陈好王询高伟翔孟庆安蒋泽伟樊红英
Owner SOUTH WEST INST OF TECHN PHYSICS
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