摘要
星载光谱仪可获取空间连续分布的光谱数据,广泛应用于陆地植被和海洋环境探测。为了校正系统的畸变,采用离轴透射式成像透镜设计,系统存在3个光轴,光轴之间夹角达到0.606°,偏心量达到0.279 mm,传统的装调方法不能解决此问题。利用计算机辅助装调技术得出系统的敏感度分析结果,提出了一种新型多基准轴定心装调方法。通过结构预置偏心和倾斜的方法构建基准轴,采用光学平板实现基准轴引出,将复杂的多光轴系统装调分解成单光轴子系统装调,完成了光谱仪多光轴透射系统装调。测试结果表明:透镜偏心误差小于25.4μm,倾斜误差小于17.7″,畸变装调结果和理论值偏差小于0.32μm,为离轴折射镜头的装调提供了一种新的思路。
The spectral data of continuous spatial distribution can be obtained by the spaceborne spectrometer,which is widely applied in the detection of terrestrial vegetation and marine environment.In order to correct the distortion of the system,the imaging lens was designed as an off-axis transmission-type optical system.There were three optical axes in the system,the angle between the axes was 0.606°,and the eccentricity was 0.279 mm,which the traditional assembly and adjustment method could not solve this problem.The sensitivity analysis results of the system were obtained by using the computer-assisted assembly and adjustment technology,and a new assembly and adjustment method of multi-reference axis centring was proposed.The reference axis was constructed by presetting the eccentricity and tilt of the structure,and the reference axis was extracted by using an optical plate.The complex multi-axis system was decomposed into the single-axis subsystem,and the multi-axis transmission system assembly and adjustment of the spectrometer was accomplished.The test results show that the lens eccentricity error is less than 25.4μm,the tilt error is less than 17.7″,and the distortion deviation between test results and theoretical results is less than 0.32μm,which provides a new way for assembly and adjustment of off-axis refraction lens.
作者
杜国军
王春雨
欧宗耀
王聪
胡斌
DU Guojun;WANG Chunyu;OU Zongyao;WANG Cong;HU Bin(Beijing Institute of Space Mechanics and Electricity,Beijing 100194,China)
出处
《应用光学》
CAS
CSCD
北大核心
2021年第2期247-254,共8页
Journal of Applied Optics
基金
国家重大国防项目。
关键词
光谱
透射
离轴
多基准
装调
spectrum
transmission
off-axis
multi-reference
assembly and adjustment
