G - Physics – 03 – C
Patent
G - Physics
03
C
73/55
G03C 5/02 (2006.01) G01J 1/42 (2006.01) G01N 21/59 (2006.01)
Patent
CA 1278700
ABSTRACT OF THE DISCLOSURE An improved method of spectrographically measuring density of a strip of photographic negative color film is disclosed. The method includes the steps of concurrently building projection image of the photographic negative color film with certain image recorded thereon on each of a plurality of smaller divisional light beam receiving faces on an image taking element with the aid of a plurality of projection optical systems including color separating means for separating projected light into three primary colors, electrically scanning a number of photoelectric converting elements on each of the smaller divisional light beam receiving faces, converting output signal obtained by electrical scanning on each of the smaller divisional light beam receiving faces and storing it, and measuring relative density, degree of saturation and average density with respect to a part on the photographic negative color film corresponding to each of the smaller divisional light beam receiving faces with reference to thus stored result. The smaller divisional light beam receiving faces are prepared by dividing a light beam receiving face having a large number of photoelectric converting elements distributed thereover in the two-dimensional manner and the number of the smaller divisional light beam receiving faces is same to that of the projection optical systems.
511953
Sato Hideo
Umemoto Choji
Jemco Inc.
Noritsu Koki Co. Ltd.
Sim & Mcburney
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