PHOTOMETRIC DEVICE AND CAMERA,申请号JP20050360368-传众专利搜索

PHOTOMETRIC DEVICE AND CAMERA

申请公布号：JP2007163862(A)

申请号：JP20050360368

申请日期：2005.12.14

申请公布日期：2007.06.28

申请人：

NIKON CORP

发明人：MAEDA ICHIRO

分类号：G03B7/099;G03B7/0997;G03B7/28;G03B13/06

主分类号：G03B7/099

摘要：<P>PROBLEM TO BE SOLVED: To provide a photometric device capable of performing high-precision photometry without suffering from influences of errors of optical members. <P>SOLUTION: Correction parameters Δx, Δy are calculated while associating sensitivity distribution of a photometric sensor 14 of a reference camera with sensitivity distribution of a photometric sensor 14 of the actual camera. The correction parameters Δx, Δy relate to a conversion function F(x, y) for obtaining light quantity in an imaging surface from an output of the photometric sensor 14 and are calculated on the basis of the actual measurement values, thereby reflecting individual difference among individual cameras. The errors arising from deviations among individual cameras are efficiently corrected by correcting the conversion function F(x, y) into F(x+Δx, y+Δy) or the like with the correction parameters Δx, Δy, and the photometry can be performed at high accuracy. <P>COPYRIGHT: (C)2007,JPO&INPIT