US PATENT SUBCLASS 359 / 767
.~.~.~.~ First two components positive

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}
763  DF  .~.~ Five components {2}
764  DF  .~.~.~ First component positive {3}
767.~.~.~.~ First two components positive {2}
768  DF  .~.~.~.~.~> + + - - + Arrangement
769  DF  .~.~.~.~.~> + + - + + Arrangement

DEFINITION

Classification: 359/767

First two components positive:

(under subclass 764) Subject matter wherein the first two components at the entrant face of the lens, i.e., the first two components hit by the light as the light begins travelling through the lens, are convergent lenses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

757+, for a multiple component lens having six components wherein the first component is positive (i.e., convergent).

759+, for a multiple component lens having six components wherein the first two components are positive (i.e., conver-gent).

764+, for a multiple component lens having five components wherein the first component is positive (i.e., convergent).

772+, for a multiple component lens having four components wherein the first two components are positive (i.e., convergent).