激光测距机接收光学系统视场光阑的设计研究

Design and study about field diaphragm of receiving optical system in a laser rangefinder

为了提高激光测距机对背景杂散光的抑制能力和对漫反射小目标的探测能力,采用了在激光测距机接收光学系统中加入与视场匹配的视场光阑的方法。经过理论分析和实验验证,此种设计可取得较好的实验效果。结果表明,在相同的背景和能见度下,对同一目标测距,视场光阑对抑制杂散光、降低噪声、提高探测灵敏度起到较好的作用。激光测距机加视场光阑后测距能力能提高到原来的约1.18倍,具有更好的测距能力。

To improve the suppression capability of the background stray light and the small-target detection capability of a laser rangefinder, a field diaphragm matching with the field was added in the receiving optical system of the laser rangefinder. Good results were obtained by the theoretical analysis and the experimental verification. The results show that the field diaphragm has better effect on the stray light suppression, the noise reduction and the detection sensitivity improvement. The ability of laser rangefinder with the field diaphragm was improved to about 1.18 times than that without the field diaphragm. The new laser rangefinder has better ranging capability than before.