光学定向与测量技术研究室知识库

To achieve azimuth and height measurement of a slowly moving point in a certain distance and wide field of view, a combined long-focal-length cylindrical lens measurement system was built. A point shape reticle, a long-focal-length optical system formed by a Galileo telescope combined with cylindrical lens and two orthogonal linear array CCD were utilized. There isn't a real middle image plane in the combined long-focal-length optical system with a relatively short optical length. The front part of the system is a Galileo telescope, and its focal power is approximate to 0. Within a measurement range, some parameters, such as the value of the angular magnification and diameter of the front part, should be properly selected, making the linear image from different field orthogonal to the two linear CCD. Through targeted lens system design optimization, proper selection of merit function, and tolerance analysis of the alignment and measurement principle, the acurracy of azimuth measurement of this system is less than ±2.5″, within field of view of 1.5°×1.5°, at the measurement distance of 10 m, additionally with relatiely small system length, and relatively loose tolerance. The proposed system can solve the problem of the limited size of light source cooperation target, making a low cost and large size photo-electronic detector. © 2016, Science Press. All right reserved.