(under subclass 216) Subject matter in which the optical or pre-photocell system includes more than one light source or more than one optical path from one or more light sources to the photocell(s).
SEE OR SEARCH THIS CLASS, SUBCLASS:
204, adjusting optical system to balance brightness in plural paths.
208.2, plural photosensitive nonimage detecting elements for systems which typically involve plural light sources or optical paths.
553, array or matrix solid-state light sources, for plural light sources.
