Variable-frequency-difference laser interference distance measuring device capable of adaptively adjusting light path

Abstract

The invention discloses a variable-frequency-difference laser interference distance measuring device capable of adaptively adjusting a light path. The device can be decomposed into a light source system capable of providing two beams of light sources with variable frequency difference, an interferometer system for realizing heterodyne interference of the two beams of light, a measuring end translation system for simulating satellite micro displacement oscillation caused by gravitational wave or gravitational field change, a phase meter for performing phase discrimination on interference signals to invert displacement information, and a core self-adaptive optical path adjusting system capable of counteracting micro optical path offset caused by frequency difference change, wherein the required peripheral support equipment comprises a vibration isolation system, a vacuum system for reducing air interference and simulating a vacuum environment, a data acquisition and processing computer and the like. According to the invention, the variable-frequency-difference laser interference distance measuring device can highly simulate the situation of Doppler frequency shift change caused by the change of the relative movement speed of a real space double-star interferometer, greatly accelerates the experimental simulation progress, and can also be used in other types of application sceneswith constantly changing heterodyne interference frequency.

Description

technical field [0001] The invention relates to a variable frequency difference laser interference ranging device for self-adaptive adjustment of the optical path, which can be used for precise distance measurement between two objects at different heterodyne frequencies, and the ranging accuracy can reach the picometer level, which can effectively simulate the space The operation of the high-precision laser interferometric ranging system under the condition that the relative speed of the double star does not change. Background technique [0002] Laser heterodyne interferometric ranging technology is a very precise ranging technology. It not only has high precision, but also has a large range and strong anti-interference ability. It is widely used in precision measurement and machinery manufacturing, industrial engineering, and satellite remote sensing, especially in lithography machines. , Precision machine tools and other advanced manufacturing equipment interferometers pla...

AI Technical Summary

Problems solved by technology

[0005] At present, the laser interferometry system at home and abroad has not designed a system for multiple laser heterodyne beat frequencies, and has not designed an adaptive feedback optical path adjustment system to adapt to multiple heterodyne frequency bands.

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