Large-caliber high-speed infrared laser measurement device based on PSD (phase-sensitive detector) array

Abstract

The invention discloses a large-caliber high-speed infrared laser measurement device based on a PSD (phase-sensitive detector) array. The large-caliber high-speed infrared laser measurement device comprises a focusing lens array, an infrared PSD array, a multi-channel preamplifier, a data collection memory and a data processing computer, wherein the focusing lens array directly cuts and focuses a large-caliber infrared laser beam and omits a huge beam concentrating system; focused spots are directly imaged on the infrared DSP array, stored by the data collection memory at a high speed after passing through the multi-channel preamplifier, and then analyzed and calculated by a wave-front processing computer, so as to rapidly and accurately obtain wave-front distribution information, strength distribution information and the like. The large-caliber high-speed infrared laser measurement device based on the PSD array is simple in structure and compact in assembly, not only can be applied to infrared laser beam diagnosis, but also can be applied to a self-adapting optical system, and has wide application prospect.

Description

technical field [0001] The invention relates to a high-speed infrared laser measuring device based on a PSD (Position and Sensing Devices) array. It can realize the high-speed multifunctional detection of the wavefront distribution information and the intensity distribution information of the large-aperture and high-speed changing infrared laser beam. It can overcome the problem of insufficient detection ability of conventional detection methods for large-caliber and high-speed changing infrared laser beams. It can be used in the fields of multifunctional detection of infrared laser beams and high-speed wavefront measurement of adaptive optics. Background technique [0002] Due to structural design defects of infrared lasers or limitations of technical and physical problems, the quality of infrared laser beams generated is degraded. There are many infrared laser beam quality testing equipment, mainly including far-field spot measuring instrument, Hartmann wavefront sensor ...

AI Technical Summary

Problems solved by technology

With the development of infrared laser technology, the demand for high-speed measurement of the quality of large-caliber infrared laser beams is increasing. The Hartmann wavefront sensor cannot meet this measurement requirement in actual measurement, mainly in the following aspects: (1) When measuring the quality of large-caliber infrared laser beams, in order to match the target surface of the infrared CCD detector, a complex and huge multi-pole beam reduction system is required, which is difficult to debug, high processing costs, and long development cycle

Due to the large and heavy equipment, it cannot be flexibly applied in the experimental site with limited space

(2) Large-target high-speed infrared CCD cameras are expensive, and there are few types of products, it is difficult to find an ideal infrared CCD camera

The infrared CCD target surface is generally relatively small, and the resolution is low after split sampling. The measurement accuracy and measurement range are greatly limited, and it is impossible to perform high-precision measurement of large aberration infrared laser beams.

(3) The frame rate of the large-aperture infrared CCD is closely related to the detection target surface, and it is difficult to obtain a high-speed infrared camera with a large target surface

Unable to meet the high-speed measurement requirements for large-aperture infrared laser beams larger than 0.3m in diameter, new technologies are urgently needed to improve the measurement accuracy and measurement rate of the measurement system

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