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Design method of free-form surface wavefront compensation element for laser system

A laser system and compensating component technology, applied in optical components, optics, instruments, etc., can solve problems such as inability to effectively correct high-frequency noise, inability to characterize the surface shape of complex components, and limited travel of deformable mirrors, so as to correct system aberrations, The effect of simplified structure and good thermal stability

Inactive Publication Date: 2019-08-16
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

Overcome the problems of wavefront distortion compensation of deformable mirrors that cannot effectively correct high-frequency noise, complex mechanical structure, limited travel of deformable mirrors, and the inability of general characterization polynomials to characterize the surface shape of complex components

Method used

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  • Design method of free-form surface wavefront compensation element for laser system
  • Design method of free-form surface wavefront compensation element for laser system
  • Design method of free-form surface wavefront compensation element for laser system

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Embodiment Construction

[0026] The present invention will be described in further detail below in conjunction with accompanying drawing, but protection scope of the present invention should not be limited

[0027] A design method for a free-form surface wavefront compensation element used in a laser system, comprising the following steps:

[0028] Step 1) Detect the distorted wavefront output by the laser system through the distorted wavefront detector, and measure the discrete data slope (S x ,S y ) to a computer;

[0029] Step 2) Calculate and obtain the polynomial W representing the distortion wavefront;

[0030] Step 3) Let the free-form surface wavefront compensation element surface shape characterization polynomial W* required to compensate the distorted wavefront of the laser system satisfy the following relationship:

[0031] Such as figure 2 As shown, when the transmission system: satisfy W=-W*;

[0032] When the reflection system: for direct radiation, satisfy W=2W*, for oblique incid...

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Abstract

The invention discloses a design method of a free-form surface wavefront compensation element for a laser system. The method comprises the steps of detecting distortion wavefront outputted by the laser system through a distortion wavefront detector, and transmitting discrete slope data (Sx, Sy) of the distortion wavefront obtained by measurement to a computer; fitting the discrete slope data witha numerical orthogonal polynomial as a primary function by use of a multi-parameter optimization design method, performing surface reconstruction by use of a mode method to obtain a distortion wavefront representational polynomial W; and according to the wavefront phase complementarity principle, calculating a surface representational polynomial W* of the free-form surface wavefront compensation element required for compensation of the distortion wavefront of the laser system to implement correction of the distortion wavefront of the laser system. The method can be used for complicated shape wavefront, is high in fitting precision, good in thermal stability, and is suitable for distortion wavefront compensation of the high-power laser system.

Description

technical field [0001] The invention relates to the technical field of wavefront distortion compensation for high-energy solid-state laser systems, in particular to a design method for free-form surface wavefront compensation components used in high-power laser systems. Background technique [0002] Due to its small size, large energy output, and high stability, high-power solid-state lasers have extremely broad application prospects in major fields such as national security, major equipment, and scientific research. The pursuit of higher efficiency, higher power, higher beam quality, and higher reliability operating modes has always been the main goal and trend of high-power solid-state laser research and development. However, in the high-energy solid-state laser system, factors such as the static wavefront distortion introduced by the deformation of the optical components of the system itself and the adjustment accuracy, and the dynamic wavefront distortion introduced by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/00
CPCG02B27/0012G02B27/0025
Inventor 路晴魏朝阳邵建达胡晨
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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