(under subclass 445) Subject matter including devices which
modify the light reflected from the material or article in a repetitive manner, mechanically or otherwise.
(1) Note. Comparative reflecting devices of the modulator type are classified here.
SEE OR SEARCH THIS CLASS, SUBCLASS:
217, for photometers of the modulating type both visual and photoelectric wherein the light intensity at some location alone is desired.
314+, for spectrophotometers which utilize mechanical, electrical, or optical modulators including the polarized light type to obtain the light intensities or the difference in light intensities for one or more frequencies of visible light where a dispersing means is used to obtain the various frequencies of light.
418, for colorimeters which utilize light modulators.
