.~ With viewed object or viewed field illumination {4}
799
.~.~ Illuminating beam coaxial with lens axis
DEFINITION
Classification: 359/799
Illuminating beam coaxial with lens axis:
(under subclass 798) Subject matter wherein the axis of the illuminating beam is parallel with the optical axis of the lens over at least a part of these axes.
(1) Note. The beam may pass through the lens or the beam may have an annular cross section and surround the lens; however, the beam axis and lens axis are coincident. Most of the art in this subclass relates to a microscope objective and the illuminating structure for the viewed object.
SEE OR SEARCH THIS CLASS, SUBCLASS:
385+, for microscope stages with substage illumination, the
