针对便携式拉曼光谱仪的小型化、高分辨率需求及弱信号能量探测问题，设计了基于高分辨率光栅光谱仪和物方大数值孔径光学探头的便携式拉曼光谱仪的光学系统，完成了样机性能测试。利用Czerny-Turner (C-T)结构光栅光谱仪的像差特性，在实现消彗差的条件下，建立了像面大小与光栅光谱仪系统参数的关系，保证了系统的像面大小与线阵CCD尺寸之间的完善匹配，完成了新型消彗差C-T结构光栅光谱仪系统。通过采用厚双胶合透镜形式的摄远光学结构，完成了物方数值孔径为0.33，并与光栅光谱仪入射光瞳完善匹配的紧凑型光学探头系统。实现了光谱分辨率优于0.6 nm、拉曼光谱范围为781~1014 nm的便携式拉曼光谱仪的优化设计和样机研制，样机尺寸为243 mm×25 mm×71 mm。通过样机实验成功获得了CCL4的5个拉曼光谱特征峰，验证了整机拉曼光谱仪系统光学设计的可行性和合理性。

Aiming at miniaturization, high resolution and weak-signal detection of portable Raman spectrometer, the rational optical systems of the high-resolution grating spectrometer and the optical probe system with large object space numerical aperture (NA) are designed, and the testing of the performance of the prototype Raman spectrometer is completed. According to the aberration theory of the Czerny-Turner(C-T) grating spectrometer, under the coma-free condition, the relation between the imaging plane and the system parameters of the grating spectrometer is established, which ensures the perfect match between the size of the image plane of the system and the size of the linear-array CCD, and then the design of the new coma-free C-T grating spectrometer is completed. By use of the telephoto optical structure of the “thick doublet”, the compact optical probe system with object NA of 0.33 is designed which perfectly matches with the entrance pupil of the grating spectrometer. The results of the spectral resolution are better than 0.6 nm and the Raman spectrum ranges from 781 nm to 1014 nm, with the prototype size of 243 mm×25 mm×71 mm. The five characteristic peaks of Raman spectrum of CCL4 are successfully measured by the prototype Raman spectrometer, which verifies the feasibility and the rationality of the optical design of the whole Raman spectrometer system.