远程激光拉曼光谱探测系统前置光学系统设计

为实现远程物质高空间分辨力的拉曼光谱探测，设计了共孔径远程激光拉曼光谱探测系统的前置光学系统。光学系统采用共孔径结构，实现了激光发射系统、拉曼光收集系统及微区成像系统的共孔径、共光轴。设计的光学系统能够对激光进行聚焦以缩小激光光斑尺寸，使系统具有优于0.125 mrad的空间分辨率。该拉曼光收集透镜有效通光口径为50 mm，拉曼散射光在耦合透镜焦平面上的像高小于25m，可以与50m狭缝宽度的光谱仪进行空间光耦合，也可使用50m芯径的光纤来耦合光学系统与光谱仪。该系统可用于远距离物质的激光聚焦、拉曼光谱探测及微区成像。

Fore optical system design for remote laser Raman spectrum detection system

In order to realize the Raman spectrum detection of high spatial resolution of remote material, a fore optical system of the common aperture remote laser Raman detection system was designed. The common aperture structure was applied in the optical system to realize the common aperture and common optical axis of the laser emission system, the Raman light collection system and the micro area imaging system. The designed optical system can focus the laser to reduce the size of the laser spot, so that the system has a better spatial resolution than the 0.125 mrad. The effective aperture of the Raman light collecting lens is 50 mm, Raman scattering light image height in coupling lens focal plane was less than 25m, space optical coupling can be directed to spectrometer with the slit width of 50m, optical fiber of 50m core diameter can also be employed for coupling this optical system and spectrometer. The system can be used for laser focusing, Raman detection and micro region imaging of long distance materials.