A general-purpose online measurement device for laser gyro mirrors

Abstract

The invention belongs to the technology of reflector online detection and particularly relates to a universal type online measuring device for laser gyroscope reflectors. The universal type online measuring device comprises a laser gyroscope cavity, optical cement cushion blocks, reflection reduction mirrors and sealing reflectors. The laser gyroscope cavity comprises a cathode, an anode, gas storage holes and capillary pores. The two optical cement cushion blocks are symmetrically arranged on the two sides of a certain gas storage hole to be measured, internal through holes of the optical cement cushion blocks are communicated with the gas storage hole to be measured through inclined through holes, the reflection reduction mirrors are arranged on optical cement surfaces perpendicular to the internal through holes of the optical cement cushion blocks, and the sealing reflectors are arranged on the rest of the gas storage holes. When the device carries out measurement, a testing laser passes through the reflection reduction mirrors, the inclined through holes and the reflector to be detected on one side and the inclined through hole and the reflection reduction mirrors on the other side in sequence, the information of the exit laser is detected in real time, and the real-time change of the performance of the reflector to be measured can be obtained. The device can effectively relieve the influence of plasma on the performance of the reflection reduction mirrors and ensure the accuracy of measurement results, makes high-precision optical processing easy and is high in universality.

Description

technical field [0001] The invention belongs to the on-line detection technology of reflectors, in particular to a general-purpose laser gyro reflector on-line measurement device. Background technique [0002] As a high-precision angular rate sensor, laser gyro has been widely used in military and commercial fields. The reflector is one of the key components of the laser gyroscope, and the performance of the reflector directly affects the accuracy of the laser gyroscope. At present, the general indicators for evaluating the performance of mirrors include reflectivity (total loss), scattering, absorption, optical constants, etc. These performance indicators can be measured by general or special instruments, such as loss meters, ellipsometers, and integral scatterometers. Wait. By using these measurement devices, low-loss, low-scattering, high-performance mirrors have been widely used in laser gyroscopes. [0003] However, during the operation of the laser gyro, the reflect...

AI Technical Summary

Problems solved by technology

This device has three shortcomings: first, due to the special structure, it can only measure the performance of the reflector under the specific environment constructed by this structure, and it is not universal; second, the distance between the mirror surface at the position of the light window and the air storage hole is too large. Recently, the performance of the anti-reflection mirror is also changed due to the influence of plasma discharge, so the measurement results cannot truly reflect the performance change of the mirror to be tested; third, the structure is processed into a concave light window by cutting, which cannot be precisely Optical polishing, poor processing surface shape and surface defect level, optical glue effect and air tightness are difficult to meet the needs of online testing

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