发明名称 Photometry device
摘要 A photometry device has a normal light photometry sensor and a external light sensor. The normal light photometry sensor performs photometry with respect to an object. The external light sensor performs photometry with respect color components of the external light. An exposure amount of an object is determined based on an output of a normal light sensor. If a difference between the exposure values is greater than the predetermined value, a color judged in the colorimetry procedure is forcibly set to "colorless" and no substantial colorimetric compensation is performed. If the Bv difference is not greater than the predetermined value, the light source compensation data preliminary stored is used for the colorimetric compensation.
申请公布号 US6487372(B2) 申请公布日期 2002.11.26
申请号 US20010897927 申请日期 2001.07.05
申请人 ASAHI KOGAKU KOGYO KABUSHIKI KAISHA 发明人 HIRAI ISAMU;IIDA YOSHIKAZU
分类号 G01J3/51;G01J1/44;G03B7/00;G03B7/28;(IPC1-7):G03B7/28 主分类号 G01J3/51
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