公开(公告)号：US5674665A

公开(公告)日：1997-10-07

申请号：US560134

申请日：1995-11-17

申请人： John Frank Sawyer ,  Michael Paul Keyes ,  John Charles Brewer ,  John Tyler Keech ,  Elizabeth Laura Kelly

发明人： John Frank Sawyer ,  Michael Paul Keyes ,  John Charles Brewer ,  John Tyler Keech ,  Elizabeth Laura Kelly

IPC分类号： G03B7/00 ,  G03C7/00 ,  G03C7/18 ,  G03C7/22 ,  G03C7/30 ,  G03C7/36 ,  G03C7/407

CPC分类号： G03C7/3041 ,  G03C2007/3015 ,  G03C2007/3024 ,  G03C2200/29 ,  G03C7/30541 ,  G03C7/36 ,  G03C7/367 ,  G03C7/38

摘要： A color negative photographic film wherein on the curve of density versus log E for each color sensitive record: (1) a straight line, which connects the point at density Dmin+0.1 and the point at 1.5log E above the exposure required for density Dmin+0.2, has a mathematical slope .ltoreq. 0.50; and (2) the difference in log E is .gtoreq.1.7 between the point 0.9log E above the exposure required for density Dmin+0.2 and the point where the density difference is 0.1 between the curve and the straight line which results from a linear regression of the three density points at exposures 0.3log E, 0.9log E, and 1.5log E above the exposure required for the density Dmin+0.2; and (3) the difference in log E is .gtoreq.1.20 between the exposure needed for density Dmin+0.1 and the point that corresponds to the exposure, in lux-seconds, of 9.2/(Film Speed). The exposure of the foregoing gray card is a typical normal exposure based on the film speed rating (i.e. the film is not overexposed or underexposed).

摘要翻译： 一种彩色负片照相胶片，其中对于每种色彩敏感记录，其密度对logE的曲线：（1）将密度Dmin + 0.1的点和在密度Dmin所需曝光以上1.5log E的点连接的直线 +0.2，数学斜率 / = 1.7 回归三个密度点在曝光时0.3log E，0.9log E和1.5log E以上所需的曝光浓度Dmin + 0.2; 和（3）在密度Dmin + 0.1所需的曝光与对应于曝光的点之间的log E的差为> / = 1.20（勒克斯秒）为9.2 /（胶片速度）。 上述灰卡的曝光是基于胶片速度等级的典型的正常曝光（即胶片不曝光不足或曝光不足）。