US PATENT SUBCLASS 359 / 421
.~.~ Selectable magnification

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

362  DF  COMPOUND LENS SYSTEM {8}
399  DF  .~ Telescope {12}
421.~.~ Selectable magnification

DEFINITION

Classification: 359/421

Selectable magnification:

(under subclass 399) Subject matter wherein the telescope includes means for step variations of the image size while the object distance remains constant.

SEE OR SEARCH THIS CLASS, SUBCLASS:

381, for a microscope with an imaging element movable in and out of the optical axis.