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A novel method based on motor driving and laser metrology is introduced to achieve large scale focal plane assembly, which is driven by the requirement of wider field of view of space optical remote sensor.Key words: FPA, Detector Assembly, Laser Metrology Extended abstract:With the development of the space remote sensor, the large scale detector array is required. The paper present a novel method of assembling the large scale FPA(Focal plane array) by precisely adjusting every single detector assembly(DA) and measuring the mosaic surface which is based on highly precise driving of the miniature linear motor and non-contact laser distance measurement. The miniature linear motor used can adjust the DA in submicron and the non-contact laser distance measurement can provides the distance in micron. Since the laser metrology method can provide the distance between the reference surface and every random region on the detector, we can get the absolute space position of every single DA by data process. By adjusting every detector to coplanar, we can achieve the mechanical mosaic of the large scale FPA.

With the requirements of high time resolution, high spatial and high spectral resolution development in geostationary orbit, photodetector pixel size has gradually become the bottleneck of the space exploration technology. Shanghai Institute of Technical Physics of Chinese Academy of Science has made a new breakthrough in CMOS image sensor area. The scale of its new CMOS image sensor achieves 2.5K × 2.5K, and then use 24 detectors to achieve a detector whose scale is 150 million. The detector has been successfully imaging on the ground. In the application process, presents a systematic test and measurement methods to deal with the time noise, dark current, fixed pattern noise, MTF and other parameters of the detector. The test results are below. The MTF of the detector is 0.565 which is measured at 57.21/mm Nyquist frequency.The number of saturated electrons reaches 8.9 × 10 4 . The total number of transient noise electrons is smaller than 16. The signal to noise ratio is 58.02dB. Through comprehensive analysis and measurement, it shows that the overall performance of the 2.5K×2.5K detector among the same types of products is in the leading position currently.