New design method of precise space replicated light-tube

During the calibration and regulation of star simulator inertial measurementunit equipment, the parameter what is the azimuth angle between emergence beam from star simulator and reflected beam of inertial measurement prism is required. The directions of two beams are opposite and there are some space translation in them. The systems require a space replication light-tube for the measurement of the parameter with one theodolite. A new method was proposed for the design of replication light-tube.the light-tube can make the light pace replicate 180 in the horizontal plane and have a two dimensional translation in the plane perpendicular to the optical axis of the star simulator. Right angle roof prism and rhombic prism were used in the design of the light-tube for the purpose to eliminate the installation error of the tube. A double wedges instrument was designed to improve the accuracy of the light-tube. With the use of double wedges, the light pace could title lightly, so the transfer deviation could be eliminated. Experimental results show that the design can not only meet the requirements of the optical path and guarantee delivery accuracy, but also reduce processing costs of the precise replicated light-tube.