Design of panoramic laser receiving optical system based on prism
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摘要: 为了实现对目标全向探测和精确定位，采用成像光学与非成像光学相结合的方法，设计了一种可用于周视探测的非对称激光回波接收光学系统。由于子午和弧矢两方向视场差异很大，需加入特殊的非对称结构来平衡两方向的视场差异，该系统采用阶梯棱镜和倒置柱面望远镜对弧矢方向大视场进行角度压缩，后经过对称聚焦子系统将光能量收集到直径为1.5mm的圆形探测器上。系统由1块阶梯棱镜、1片非球面镜、2片柱面镜和2片球面镜组成，其光圈数达到0.56。结果表明，单套接收系统完成±30°视场探测，6套接收系统组合起来可实现360°周视无盲点探测。整体系统体积小、结构简单，有良好的适用性。Abstract: In order to realize omnidirectional detection and precise positioning of a target, a solution of the nonsymmetrical receiving optical system used for laser panoramic detection was presented based on imaging optics and non-imaging optics theory. Due to the significant difference between the meridianal and sagittal field, it was necessary to join the special asymmetric system to balance the big difference. Therefore the prism system and the inverted telescopic system were adopted to condense the field of sagittal direction. Then, the optical energy can be collected to the circular detector with a diameter of 1.5mm after the focusing system. The system was composed by an echelon prism, a aspheric lens, two cylindrical lens and two lenses, with the F-number of 0.56. The results show that a single set of system can complete the detection of ±30° field of view and six sets of receiving systems constitute a 360° field of view to complete panorama detection. This result is helpful for realizing no blind spot detection. The practical system has small volume, compact structure and good applicability.
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Keywords:
- optical design /
- laser echo receiving /
- echelon prism /
- inverted telescopic system /
- asymmetric
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