(under the class definition) Subject matter comprising one separate optical element, aperture or tube for each eye of the user or comprising a single optical element used alternately by each eye.
SEE OR SEARCH THIS CLASS, SUBCLASS:
404, for telescopic binocular having plural optical axes.
407+, for binocular type compound lens system.
466+, for stereoscopic viewing devices.
618+, for systems including a single optical channel which merges to or from a plural optical channel, the plural channel lacking the binocular use.
