Semiautomatic Color Analyzer

A semiautomatic color analyzer is described for rapidly determining the extent of unbalance, or deviation from “type,” of a processed color negative or color positive monopack film. A standardized light source, a rotating color filter having three sectors which transmit narrow spectral bands of blue, green and red light, a multiplier-type phototube and amplifier, and a cathode-ray tube are employed. The sweep circuit of the cathode-ray tube is synchronized with the rotating filter wheel so that a horizontal straight-line image is produced when a gray or near-gray density of a “balanced” sample is in the light path. A cathode-ray tube image which deviates from a horizontal straight-line image indicates unbalance in a test sample, whereupon correction filters can be introduced in the light path by means of servomechanism devices to produce a horizontal straight-line or “balanced” condition.

Print ISSN

0898-042X

Published

1951-02

Content type

Original Research

DOI

10.5594/J01849