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）。

公开(公告)号：US5705327A

公开(公告)日：1998-01-06

申请号：US715295

申请日：1996-09-16

申请人： John Charles Brewer ,  John Tyler Keech ,  John Frank Sawyer

发明人： John Charles Brewer ,  John Tyler Keech ,  John Frank Sawyer

IPC分类号： G03C7/30 ,  G03C1/46

CPC分类号： G03C7/3041

摘要： Color negative photographic films having red, green and blue color sensitive records, wherein the ratio of the toe area contrast to the mid-scale contrast for each of the red, green and blue color records is less than or equal to 0.80, and either at least two color records having a toe-area contrast less than or equal to 0.42 or a mid-scale contrast less than or equal to 0.55, or the film having a speed rating of ISO 200 or greater. The mid-scale contrast for a color record is defined as the slope of a straight line connecting a point C and and a point D on the characteristic curve of Status M density versus log Exposure for the color record, where points C and D are located by defining a point A on the characteristic curve at a density level 0.1 above minimum density, a point B is located on the characteristic curve at an exposure value +1.0 Log Exposure beyond point A, and points C and D are located at exposure values -0.45 log Exposure and +0.45 log Exposure with respect to point B, respectively. The toe-area contrast is the slope of a straight line connecting a point E and a point F on the characteristic curve, where point E is located at (mid-scale contrast)/6 density units above minimum density, and point F is located at 0.3 log Exposure higher in exposure on the characteristic curve than point E. Use of such a color negative films are particularly advantageous in making telecine transfers.

摘要翻译： 具有红色，绿色和蓝色颜色敏感记录的彩色负片照相胶卷，其中针对红色，绿色和蓝色彩色记录中的每一个的趾部区域对比度与中等尺寸对比度的比率小于或等于0.80， 具有小于或等于0.42的趾部对比度或小于或等于0.55的中等尺度对比度的至少两个彩色记录，或者具有ISO 200或更高的速度等级的胶片。 颜色记录的中等尺度对比度定义为连接点C和点D与状态M密度的特征曲线上的点D相对于颜色记录的对数曝光的斜率，其中点C和D位于 通过将特征曲线上的点A定义在最小密度以上的密度级别0.1，点B位于特征曲线上，曝光值+1.0对数曝光超过点A，点C和D位于曝光值 - 0.45对数曝光和+0.45对数分别相对于点B曝光。 脚趾区域的对比是连接点+ E，uns E + EE和特征曲线上的点F的直线的斜率，其中点+ E，uns E + EE位于（中等尺度对比度）/ 6个密度单位高于最小密度，并且点F位于0.3log暴露在特征曲线上高于点+ E，未E + EE的曝光。 使用这种彩色底片在制作电视电影转印中是特别有利的。