US PATENT SUBCLASS 359 / 775-- .~.~.~.~ + -

US PATENT SUBCLASS 359 / 775
.~.~.~.~ + - - + Arrangement

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

642	DF	LENS {32}
754	DF	.~ Multiple component lenses {6}
771	DF	.~.~ Four components {2}
772	DF	.~.~.~ First component positive {5}
775		.~.~.~.~ + - - + Arrangement {1}
776	DF	.~.~.~.~.~> With multiple element component {2}

DEFINITION

Classification: 359/775

+ - - + Arrangement:

(under subclass 772) Subject matter wherein the plus and minus signs indicate convergent and divergent lens components, respectively.

(1) Note. The arrangement along the optical axis of the lens is identified by the leftmost sign representing the component at the entrant face of the lens, i.e., the direction of light travelling through the lens is the same as the reading arrangement of the subclass title.

SEE OR SEARCH THIS CLASS, SUBCLASS:

688, for a + - - + arrangement in a mechanical compensation variable magnification lens.