Device for realizing light beam automatic shaping using shape changing lens

Abstract

A device that uses a deformable mirror to realize automatic beam shaping, consisting of a laser, a telescope, a deformable mirror, a CCD camera, a D / A conversion card, a high-voltage amplifier, a variable density attenuation disk, a main control computer, an image acquisition card, a focusing lens, and a genetic control Algorithm composition, the present invention uses the genetic algorithm to control the deformable mirror, by changing the phase distribution of the near-field wave surface of the laser beam, so as to achieve the purpose of changing the shape of the far-field spot, without calculating the relationship between the far-field spot shape and the near-field phase Under the premise of the formula, laser beam shaping can be realized; not only can the Gaussian laser beam be shaped into super-Gaussian beam, square beam, etc. Correction. The invention has the advantages of simple structure, strong versatility and easy realization, can be applied to occasions with specific requirements on the shape of the laser beam, and can greatly expand the application field of the laser.

Description

technical field [0001] The invention relates to an adaptive optics device, which is an adaptive optics device which uses a piezoelectric ceramic deformation mirror to automatically shape the beam of a continuous laser. Background technique [0002] Since the advent of lasers, they have been widely used in many fields. In most fields, lasers are only required to output good-quality laser beams; however, in some specific fields, there are special requirements for the shape of laser output beams. Generally speaking, the energy of the far-field focal spot of an ideal Gaussian beam is only 84% of the total energy within one diffraction limit, and about 16% of the total energy is in its side lobes. In fact, the side lobes The existence of often affects the successful application of laser beams in certain fields. Compared with Gaussian beams, super-Gaussian beams, square beams and other shapes of beams have less sidelobe effects. The application of such beams in some industrial ap...

AI Technical Summary

Problems solved by technology

[0004] The technical problem of the present invention is to overcome the deficiencies of various existing laser beam shaping methods, and provide a device that uses a deformable mirror to realize automatic beam shaping. It uses a deformable mirror as a shaping element, which can not only shape an ideal Gaussian beam , can also shape beams containing static or dynamic aberrations

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