US PATENT SUBCLASS 359 / 676
.~ With variable magnification (e.g., zoom type )

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


359 /   HD   OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS

642  DF  LENS {32}
676.~ With variable magnification (e.g., zoom type ) {6}
677  DF  .~.~> Optically compensated
678  DF  .~.~> Prism lens type
679  DF  .~.~> With fixed conjugates
680  DF  .~.~> Reverse telephoto {2}
683  DF  .~.~> With mechanical compensation {6}
694  DF  .~.~> Adjusting mechanism {6}

DEFINITION

Classification: 359/676

With variable magnification (e.g., zoom type):

(under subclass 642) Subject matter wherein the equivalent focal length of the lens may be continuously varied between predetermined limits.

(1) Note. The variation of the equivalent focal length of the lenses of this generic subclass is accomplished by axially shifting certain components of the lens relative to

other components.

SEE OR SEARCH THIS CLASS, SUBCLASS:

432, for variable magnification compound lens systems.

672+, for lenses whose focal length may be selected by exchanging, adding, or removing lens components.

694+, for mechanisms that axially shift the lens components whereby the continuous variation of the equivalent focal length is accomplished.

754+, for fixed focal length lenses. 823+, for mechanisms that axially shift the lens components for the purpose of axially adjusting the focal plane of the lens.