发明授权
- 专利标题： System for calibration of optical instrument on satellite with reference light source
- 专利标题（中）： 带有参考光源的卫星光学仪器校准系统
-
申请号： US946641申请日： 1992-09-18
-
公开(公告)号： US5325171A公开(公告)日： 1994-06-28
- 发明人: Yukiharu Shimizu
- 申请人： Yukiharu Shimizu
- 申请人地址： JPX Tokyo
- 专利权人： NEC Corporation
- 当前专利权人： NEC Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX3-269988 19910920; JPX4-032683 19920123
- 主分类号： G01M11/00
- IPC分类号： G01M11/00 ; B64G1/22
摘要：
A calibration system for periodically calibrating an optical instrument on board a satellite with reference light. In the disclosed system, a calibration unit has two photodetectors one of which is positioned near the light source which radiates reference light and the other near the aperture from which the reference light emerges toward optics of the instrument. Therefore, it is possible to discriminate between contamination or degradation of the optical instrument and contamination of the calibration unit. Two identical and independent calibration units are employed to provide redundancy and enhance the accuracy of calibration.
公开/授权文献
- US4707427A Squarylium compound in an electrophotographic element 公开/授权日：1987-11-17
信息查询
