US PATENT SUBCLASS 359 / 799
.~.~ Illuminating beam coaxial with lens axis


Current as of: June, 1999
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359 /   HD   OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS

642  DF  LENS {32}
798  DF  .~ 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

beam usually being coaxial with the barrel.