(under the class definition) Subject matter wherein there is means to examine one or more transparent elongated structures (e.g., rods, fibers, or pipes) which are used to transmit light rays from one point to another within the confines of their outer surface, and involving internal reflections or modal transmission.
SEE OR SEARCH THIS CLASS, SUBCLASS:
384+, for measurement or tests of nonoptical fibers, width or diameter.
429+, for optical inspection of nonoptical fibers, per se.
SEE OR SEARCH CLASS
250, Radiant Energy,
559.01+, for circuits for evaluating a web, strand, or strip; and for detection of defects or flaws in a web, strand, or strip.
385, Optical Waveguides, appropriate subclasses for optical fibers, per se.