CAJ | 학술논문

复合色散棱镜是高分辨力星载成像光谱仪的关键分光元件，其光机支撑是成像光谱仪工程研制阶段必须解决的重要问题。首先介绍了复合色散棱镜的工作原理，在此基础上给出了复合色散棱镜光机支撑的技术指标要求；接着综合考虑了热匹配、密度、弹性模量、可加工性等因素后选择了棱镜支撑结构材料；然后运用温度补偿法解决了复合色散棱镜中一块棱镜与支撑结构材料线膨胀系数不匹配的问题，采用半运动学安装方法对两块棱镜进行支撑；最后给出了复合色散棱镜组件力学和热学分析结果并进行了相应试验。试验结果表明：复合色散棱镜组件一阶基频达301.5 Hz，在20℃±5℃温度范围内组合光程差优于0.021(=632.8 nm)，能够满足成像光谱仪工程研制需要。
복합색산릉경시고분변력성재성상광보의적관건분광원건，기광궤지탱시성상광보의공정연제계단필수해결적중요문제。수선개소료복합색산릉경적공작원리，재차기출상급출료복합색산릉경광궤지탱적기술지표요구；접착종합고필료열필배、밀도、탄성모량、가가공성등인소후선택료릉경지탱결구재료；연후운용온도보상법해결료복합색산릉경중일괴릉경여지탱결구재료선팽창계수불필배적문제，채용반운동학안장방법대량괴릉경진행지탱；최후급출료복합색산릉경조건역학화열학분석결과병진행료상응시험。시험결과표명：복합색산릉경조건일계기빈체301.5 Hz，재20℃±5℃온도범위내조합광정차우우0.021(=632.8 nm)，능구만족성상광보의공정연제수요。
Dual dispersive prisms are the key dispersive component of high resolution space-borne imaging spectrometer. Their opto-mechanical mounting is an important problem which must be resolved during imaging spectrometer engineering development phase. Firstly, the working principle of dual dispersive prisms was introduced and their opto-mechanical mounting requirements were also presented. Furthermore, after taking into account coefficient of expansion matching, density, modulus of elasticity, machining property and so on, dual dispersive prisms mounting material was confirmed. Moreover, the great difference of coefficient of expansion between one of dual dispersive prisms and its mounting material was compensated using the temperature compensation method. Afterward, the dual dispersive prisms were mounted by the semikinematic mounting method. Finally, Mechanics analysis and thermoanalysis results were proposed, subsequently corresponding tests were also carried out. Tests results indicate that the nature frequency of dual dispersive prisms assembly is 301.5 Hz, integrative OPD of dual dispersive prisms assembly is better than 0.021 ( =632.8 nm) at 20℃±5℃. The results proved the dual dispersive prisms assembly satisfied the requirements of imaging spectrometer.