长波红外与激光共型光学系统优化设计

Optimization Design of Long Wave Infrared Rays and Laser Optical System with Conformance Structure

为了实现小型化设备的精密测量，提出了一种共孔径长波红外／激光双模测量方案。根据实际需求完成了光学系统设计，系统中的长波红外成像，激光接收、发射光学系统采用了共型设计，长波红外成像，激光接收系统采用了共用光阑和主光路的结构形式，压缩了整个光学系统体积。设计出的整个光学系统体积为450mm×164mm×164mm，符合小型化、轻量化要求。通过在光学设计软件中的分析可知，该系统中的长波红外光学系统在30lp／mm处调制传递函数大于0．23，激光发射端波相差小于1／4波长，激光接收端弥散斑半径小于10μm，满足实际工程设计要求。

In order to improve the precision of small measure equipment, the manuscript presents a structure of common aperture, long wave infrared rays/laser dual-mode measure equipment. Then an optical system is designed to match the system＇s needs. The long wavelength infrared imaging system and the laser receiver, laser emission system use the same protect window, the far infrared imaging system and the laser receiver use the same aperture and reflector, in this way the size of optical system is reduced. The volume of the whole optical system is 450 mm× 164 mm×164 mm, coincident with the requirement of small and light. At last, analysis the performances of each optical systems by the software, the modulation transfer function of the far infrared imaging system is above 0.23 at 30 lp/mm, the optical path difference of the laser receiver is smaller than 1/4 wavelength, the spot diagram of laser emission system is smaller than 10 μm, all of them can match the project requirement.