Recently, Shaanxi Branch of the CAS convened the review meeting for the scientific and technological progress award of Shaanxi Branch of the CAS, 2012. The high-precision distortion testing equipment (the transport airship’s CCD optical imaging sensatory optical system ground calibration equipment) of XIOPM won the first prize of scientific and technological progress award of Shaanxi Branch of the CAS.

The high-precision distortion testing equipment (the transport airship’s CCD optical imaging sensatory optical system ground calibration equipment) performs distortion testing on the optical system image surface by star testing. It obtains key technological breakthrough in testing method and precision and shows the new research direction for distortion testing technology. The transport airship’s CCD optical imaging sensatory optical system ground calibration equipment uses the micro camera system as the receiver on the optical system image surface, tests the star image position by optical magnification and subdivision and combining with the weighted image centroid interpretation; meanwhile, it uses laser interference method to carry out high-precision measurement to the microscope system displacement on the optical system image surface, which makes the measurement accuracy of image height reach to tens of nanometers. Combining with the optical system distortion design, the equipment has high precision of distortion measurement. The distortion algorithm adopts the weighted least square method and turntable standard angle to calculate the theoretical image height, the square field of view of optical system image is about ±10mm, the measure precision of absolute distortion is better than ±0.2μm and the measure precision of relative distortion is better than 0.002%. After being applied by the clients, the equipment shows its high-precision distortion testing. It can give a true reflection of the change and distribution of the distortion of the tested optical system image surface. With stable performance, good reproducibility in testing results, the equipment has become the transport airship’s CCD optical imaging sensatory optical system special ground calibration equipment). Its successful development provides strong and powerful technological security to the spacecraft docking of our country.