激光陀螺新型光路程长控制镜的研制

Research on New Type Control Mirror of Light Path and Optical Path Length for Ring Laser Gyroscope

爪盘结构程长控制镜由于其稳定性好等优点,已越来越广泛地应用于激光陀螺的腔长控制,但这种只有程长控制能力的控制镜,对陀螺腔体变形等原因引起的谐振光路变化却是无能为力。通过分析该类腔长控制镜的特点,提出了一种新颖的具有角度控制功能的光路程长控制镜。在原有的控制镜上增加一组角度控制部件,使其不仅有程长控制功能同时还具备了光路控制功能的方法,设计了新的槽片及角度控制元件,研制出了高性能的光路程长控制镜。系统地对控制镜的性能进行了测试。结果表明,它不仅稳定性好(陀螺使用温度范围内最大歪扭变化量小于0.3″),而且灵敏度高(大于0.1″/V)。

Because of advantages such as high stability, the cavity path length control mirror （PLCM） with a clawdisc-like actuator is widely used in ring laser gyroscope （RLG） to control its cavity legnth. But it cannot do anything to the change of the light path caused by the deformation of gyro block etc. Mter analyzing the feature of the PLCM and based on it, a new control mirror with angle control ability that is called path and path length control mirror （PPLCM） is presented. The new control mirror can control not only the optical path length but also the light path with adding a set of angle control components to the PLCM. Novel grooved mirrors and angle control components are designed, and a new PPLCM with high performance is developed. Its property is tested, and the experimental results show that it has high stability （the largest deflection is less than 0. 3＂ in the temperature range of ring laser gyroscopy） and controlling sensitivity （more than 0.1 ＂/V）.