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公开(公告)号:WO2021146959A1
公开(公告)日:2021-07-29
申请号:PCT/CN2020/073635
申请日:2020-01-21
Applicant: 杭州芯格微电子有限公司
Inventor: 闵丙日
IPC: G01J1/44 , G01J1/0295 , G01J1/0429 , G01J1/4204 , G01J2001/446 , G02B27/286
Abstract: 显示器(10,10')下部的照度传感器(100,101),其包括:光选择层(200,201),具有通过从显示器(10,10')的外部入射的外来光(20)生成的显示器圆偏光(22,22')以及像素所生成的非偏光(30)前进的第一光路径以及第二光路径;以及光传感器(300),具有检测通过第一光路径后的光的第一受光部(310,310')以及检测通过第二光路径后的光的第二受光部(320,320'),第一光路径使显示器圆偏光(22,22')以及非偏光(30)都通过,第二光路径阻隔显示器圆偏光(22,22')并使非偏光(30)通过。
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公开(公告)号:WO2022177646A2
公开(公告)日:2022-08-25
申请号:PCT/US2021/065849
申请日:2021-12-31
Applicant: RAYTHEON COMPANY
Inventor: SCHILLER, Stephen, J.
IPC: G01J1/04 , G01J3/02 , G01J3/28 , B64C2201/122 , B64C39/024 , G01J1/0295 , G01J1/0414 , G01J3/021 , G01J3/0297 , G01S19/235 , G01S19/26 , G08G5/0013
Abstract: An apparatus and method of intersensor calibration including using a zero airmass response constant proportional to sensor absolute radiometric gain coefficients to monitor sensor radiometric stability. Tracking the ratio of zero airmass response constant values for similar bands between two sensors provides a parameter on a common radiometric scale for evaluating interoperability performance. The method includes imaging a solar signal using a mirror to create an image reference target, detecting the image reference target using a first sensor, generating a zero airmass response constant based on a ground sampling distance of the first sensor and an at-sensor radiance value, computing a radiometric gain coefficient of the first sensor using the zero airmass response constant, and comparing the radiometric gain coefficient of the first sensor to a radiometric gain coefficient of a second sensor to determine a gain ratio between the first sensor and second sensor.
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