(under subclass 402) Subject matter wherein there is apparatus to examine sequentially or simultaneously for at least three colors of light either directly or when reflected from or transmitted through a substance to be tested.
(1) Note. The devices may be of the visual or the photosensitive type.
SEE OR SEARCH THIS CLASS, SUBCLASS:
300+, for apparatus which may examine light emitted from substances or the absorption of light by substances or the examination of light, per se, by spectroscopes, spectrometers, or spectrophotometer which utilize monochromators which permit the entire visual spectrum of light to be used to examine substances or to examine light for any or all of the colors which may be inherent in the light examined.
405, for test structure similar to that used here but differing only in the type of filters used to examine the light or the substances.
407, for apparatus wherein the light from a substance or light itself is examined at the same time for two different colors.
419, for similar subject matter where the disclosure or the claims do not examine light or substances for at least three distinct colors, but use test structure similar to that found here and in subclass 405.
