关键词: 激光陀螺;调腔;倾斜接触式方法;自动搜索

Abstract: Cavity adjustment is a key step in the manufacturing process of ring laser gyroscope. To fulfill the difficult cavity adjustment task, a slope-contact-type method is presented on the base of analyzing the cavity adjustment principle. The method attains desired parallelism which brings a spherical mirror into light contact with a cavity by gravity. According to the method an automatic slope-contact-type cavity adjustment system is developed. The system includes an optical module, a mechanism and control module, a vision detection module and a loss detection module. By using the output laser information obtained by the vision detection module and the loss detection module, the closed loop control of the spherical mirror position is realized. By means of the relationship between the loss and the center deviation of the beam and the diaphragm, a coarse-fine strategy is proposed which can automatically search an optimal position to assemble the spherical mirror. The experimental results verify the validity of the proposed method and system.

Key words: ring laser gyroscope;cavity adjustment;slope-contact-type method;automatic search