可见-短波红外波段光谱模块光机装调及分析

介绍了自行研制的辐射仪器的光谱模块，其光谱范围覆盖可见-短波红外波段(400 nm~2 500 nm)，讨论了光谱模块的装调方法并对装调结果进行了分析研究。辐射仪器由3个光谱模块组成，分别是可见波段光谱模块(400 nm~1 000 nm)，近红外波段光谱模块(900 nm~1 700 nm)和短波红外波段光谱模块(1 600 nm~2 500 nm)，光谱模块的探测单元均以平场凹面光栅分光，线阵探测器探测信号，光谱模块的光机组件主要包括光纤头、狭缝、反射镜组件、光栅组件和探测器组件等。鉴于光谱模块的光机装调效果与其光机设计息息相关，装调结果的好坏能反映光机设计的优劣，针对光谱模块的光机设计特点进行了光机装调。光机装调分析结果表明:3个光谱模块的波长分辨率分别优于4 nm，15 nm和20 nm，达到了仪器的设计指标，验证了光机设计、装调的合理性。

Opto-mechanical assembly and analysis of spectral module in visible-short wave infrared band

The spectral modules of self developed radiometer are introduced. The spectral range covers the visible-short wave infrared band(400 nm~2 500 nm).The methods of opto-mechanical assembly of spectral modules are discussed and the results of opto-mechanical assembly are analyzed. The radiometer consists of three spectral modules: the visible spectral module(400 nm~1 000 nm)(VIS for short), the near-infrared spectral module(900 nm~1 700 nm)(NIR for short), and the short wave infrared spectral module(1 600 nm~2 500 nm)(SWIR for short).The detection units of spectral module use the flat-field concave grating to diffract and focus different wavelengths, use the linear array detector to detect signals.The optical units of spectral modules consist of optical fiber, slit, assembly of reflector, assembly of grating and assembly of detector. Since the effect of opto-mechanical assembly is closely related to opto-mechanical design, the result of opto-mechanical assembly can reflect the advantages and disadvantages of opto-mechanical design. According to the characteristics of the opto-mechanical design of the spectral modules, the opto-mechanical assembly was carried out. The results of opto-mechanical assembly show that the wavelength resolution of the three spectral modules is better than 4 nm, 15 nm and 20 nm, respectively. The design indexes of the spectral module are achieved, verifying the rationality of the opto-mechanical design.