高精度双光束干涉指零仪的研制  

Development on a high precision null-indicator by using two-beam interference

作　　者：黄云[1] 黄海乐[1] 刘贱平[1] 龙兴武[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,湖南长沙410073

出　　处：《红外与激光工程》2012年第9期2498-2502,共5页Infrared and Laser Engineering

基　　金：国防科技预研基金(51309050301)

摘　　要：在激光陀螺动态测角过程中,瞄准并建立一个可靠的零点是比较关键的问题。利用双光束干涉原理设计了指零仪的光路,描述了其瞄准原理和电路组成,分析了研制过程中应该注意的问题。利用高精度速率偏频激光陀螺的输出脉冲对指零仪进行了稳定性和重复性的实验,在转速为144(°)/s时指零仪的指零精度优于±0.1″,指零重复精度优于±0.05″。结果证明,所研制的指零仪具有很高的指零精度和良好的动态响应能力,验证了设计的合理性和可行性,为高精度激光陀螺测角仪的研制奠定了良好的基础。In the dynamic angle-measurement,how to establish a reliable null spot is a key issue.The light path design of null-indicator（NI） was carried out by using two-beam interference.Its aiming principle and the electric circuit composition were described.The question which should be paid attention to in the designing was analyzed.Stability and repetition experiments of NI were carried out by using the output pulse of the RLG.The results show that the precision of NI excelles ±0.1″at a rotary speed of 144（°）/s,the repetition precision excelles ±0.05″.Null signal has been obtained well through the experiment,which confirms its rationality and feasibility and provides foundation for the high precision ring laser goniometry.

关 键 词：角度测量 激光陀螺 双光束干涉 指零仪 道威棱镜 

分 类 号：TH741.2[机械工程—光学工程]