Acta Photonica Sinica, Volume. 50, Issue 12, 1204002(2021)

Modulation Transfer Function Testing Technology of Ultraviolet Focal Plane Arrays Device

Hongchao WANG1, Jiqiang WANG2、*, Bin WU1,3, Jingsong LI1, Hongyuan LIU1, Facai ZHAO1, and Chengping YING1
Author Affiliations
  • 1The 41st Institute of CETC, Qingdao , Shandong 266555, China
  • 2Key Laboratory of Infrared Imaging Materials and Detectors, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
  • 3Science and Technology on Electronic Test & Measurement Laboratory, Qingdao , Shandong 266555, China
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    Aiming at the test requierments of modulation transfer function for ultraviolet focal plane arrays, a system based on knife-edge scanning method is built to measure the modulation transfer function. Knife-edge is clearly imaged on the detector by a SW-Cassegrain reflective optical system and actual test shows that the optical system is near the diffraction-limitation in range of 0~100 lp/mm. An ultraviolet focal plane array device is tested by this system and the principle of maximum area under modulation transfer function curve is adopted to realize automatic focusing of knife edge image. The edge spread function curve is fitted by the model of three term Fermi function, which can effectively increase the fitting accuracy. Experimental results show that the measured modulation transfer function value of ultraviolet focal plane arrays is about 0.601, which is close to its theoretical limit. Meanwhile, the repeatability is good, and relative standard deviation of modulation transfer function whithin the Nyquist frequency range is about 1.8%. Uncertainty analysis indicate that maximum uncertainty of the equipment is about 6.2%, which can meet the needs of practical application.

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    Hongchao WANG, Jiqiang WANG, Bin WU, Jingsong LI, Hongyuan LIU, Facai ZHAO, Chengping YING. Modulation Transfer Function Testing Technology of Ultraviolet Focal Plane Arrays Device[J]. Acta Photonica Sinica, 2021, 50(12): 1204002

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    Paper Information

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    Received: Jul. 7, 2021

    Accepted: Aug. 11, 2021

    Published Online: Jan. 25, 2022

    The Author Email: WANG Jiqiang (wangjiqiang@mail.sitp.ac.cn)

    DOI:10.3788/gzxb20215012.1204002

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