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High-Precision Splicing and Testing for the FPA of Space Camera

The focal plane assembly is one of the most important components of Space camera, whose splicing accuracy the camera imaging quality. Through the analysis of CCD's splicing methods, the focal plane of space camera was staggered lap compact mechanical design, carried out high-precision splicing and testing. While splicing the image processing technology is used to CCD's pixel labeling's quantization processing. The ultimate purpose is to eliminate possible errors which due to human visual impact on the stitching accuracy and improve stitching accuracy based on the focal plane's character. The results show that the focal plane of CCD chip overlap error is less than 3 μm, the two rows of CCD in the parallel error is less than 3 μm, the coplanar error is less than 5 μm. Finally, according to the analysis of the image obtained from the imaging test on the ground, the camera image stitching results were coincided with the test results, which proved that the method is feasible and accurate. All the results show that the splicing and testing of the FPA for TDI CCD is achieved high-precision.