大尺度多光谱多光轴平行性检校系统

为对室内不拆装情况下大型或整车上的多谱段光电装备进行光轴平行性检校，设计了大尺度多光谱多光轴平行性检校系统。系统采用一个多光谱平行光管提供多个谱段的无限远目标，通过二维移动平台实现平行光管的室内大跨度移动。利用倾角传感器、双线阵CCD测量系统和姿态调整机构来恢复和保证平行光管移动前后的光轴平行性，实现室内分布在车体上不同轴距不同谱段光电装备的光轴平行性进行统一检校。系统设计方案和误差分析结果表明:该系统平行光管移动前后的光轴平行性总误差小于0.142 mrad，在提高检校精度的同时还大大减小了光轴平行性检校的工作量；各分系统中倾角传感器和姿态调整机构误差对系统总误差贡献最大，通过选用更高精度的分系统还可进一步提高系统的总体精度，满足更高精度装备的光轴平行性检校要求。

Optical axis parallelism calibration system of large scale multi spectral multi optical axis

In order to calibrate the optical axis parallelism of multispectral photovoltaic equipment indoor without dismantling the integrated equipment or vehicle, we designed a optical axis calibration system. The system provided a plurality of spectral bands infinity object by a multi spectral collimator, realized the large span translation of collimator indoor through a two dimensional mobile platform, restored and ensured the optical axis parallelism of the collimator before and after translation using the tilt sensor, the double linear array charge coulped device (CCD) measurement system and the posture adjustment mechanism. The optical axis parallelism of optoelectronic equipments indoor, at different positions on vehicle with different optical axis distances and spectral bands, was calibrated by one time. Moreover,we analyzed the design and error of the all subsystems. The results show that the system total error of the optical axis parallelism before and after translation is less than 0.142 mrad, this system can both improve the calibration accuracy and reduce the workload of the optical axes calibration. The errors of tilt sensor and position adjustment mechanism have the greatest contributions to the total system error, the system would have a higher system accuracy by selecting subsystems with higher accuracy, and could meet the requirement of more precision optical axes calibration.