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将可见光与红外光学系统运用分光镜和卡塞格伦平行光学系统组合成平行共光路系统。运用这一特性研发了红外与可见光发射光轴平行度检测仪,用红外和可见光CCD作为传感器。在平行度检测仪前放置标准平面反射镜,进行自准标校。进行平行度检测时,检测仪放置在被测复合光学系统前,标准平面反射镜放置在光学系统后。调整平行度检测仪,使检测仪的可见光轴与复合光学系统的可见光轴平行;再调标准平面反射镜,使可见光学系统成自准直像。以可见光轴为基准,采集检测仪经复合光学系统及标准平面反射镜后的红外像。进行图像分析及数据处理,得到复合光学系统红外光轴与可见光轴的平行度。检测仪的不确定度为3.5″。
The visible light and infrared optical system using beam splitter and Cassegrain parallel optical system is combined into a parallel common-optical system. The use of this feature has developed infrared and visible light axis parallelism detector, infrared and visible light CCD as a sensor. Place a standard flat mirror in front of the parallelism detector to carry out self-calibration. For parallelism detection, the detector is placed in front of the composite optical system under test and a standard flat mirror is placed behind the optical system. Adjust the parallelism detector so that the visible light axis of the detector is parallel to the visible light axis of the composite optical system. Adjust the standard flat mirror to make the visible light system self-collimating. Taking the visible light axis as the reference, the infrared image of the detector after the composite optical system and the standard plane mirror is collected. Perform image analysis and data processing to obtain the parallelism between the infrared axis and the visible axis of the composite optical system. The uncertainty of the detector is 3.5 ".