Variable compensation interference detection system and method for large-gradient phase-type highlight element

Abstract

The invention discloses a variable compensation interference detection system and method for a large-gradient phase-type strong light element, and the system comprises a wave surface interferometer, a standard lens, a to-be-detected large-gradient phase-type strong light element, a beam expanding system, an SLM, an SLM phase control system, and a translation platform, and the beam expanding system is used for achieving the matching of the aperture of the SLM and the aperture of the wave surface interferometer. The control end of the SLM is connected with the SLM phase control system, the SLM phase control system is used for controlling the SLM to generate variable aberration compensation and compensating large-gradient wavefront aberration of a super-wavefront interferometer range of the to-be-detected large-gradient phase type highlight element, and the translation stage is used for controlling and compensating transverse translation of the to-be-detected large-gradient phase type highlight element and compensating large-gradient wavefront aberration of a super-wavefront interferometer range of the to-be-detected large-gradient phase type highlight element so that the wavefront interferometer measures the sub-apertures of the phase elements one by one. According to the invention, the SLM variable aberration compensation technology and the sub-aperture splicing technology are combined, and the system has the advantage that the adaptive capacity of the interferometer to the wavefront gradient of the phase-type highlight element is improved.

Description

technical field [0001] The invention relates to the field of adaptive optics and the field of optical precision measurement, in particular to a variable compensation interference detection system and method of a large gradient phase type strong light element. Background technique [0002] Inertial Confinement Fusion (ICF) uses strong laser light to directly irradiate hydrogen atoms to cause fusion and generate huge energy. During the "ignition" process of the ICF, when the laser beam passes through the small holes on both sides of the cavity-shaped target, the plasma generated by the interaction between the side lobe of the focal spot and the edge of the target hole will expand to the center of the target hole at a high speed, preventing the subsequent laser from entering the target cavity, causing plasma The body is blocked, which leads to the failure of the physical experiment. In addition, in order to achieve uniform implosion within the 4π solid angle of space, obtain a...

AI Technical Summary

Problems solved by technology

However, in order to meet the requirements of laser targeting focus spot size, shape, and laser irradiation uniformity, it is necessary to further improve the design wavefront gradient of the phase-type high-light element. Measuring the design and processing of large gradient phase type strong light components, which in turn affects the development of Shenguang series strong laser devices

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