... metric camera 量测摄影机 micro characteristic curve 测微特性曲线 microdensitometer 测微密度计 ...
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本文提出一种新方法——密度矩和法，用底片上已知亮度恒星的PDS测微密度数据来同时决定底片特性曲线和星等零点。
A new method is suggested for determining the characteristic curve of a plate, as well as the magnitude zero point, using PDS microdensitometer data of stars of known brightness on the plate.
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