US PATENT SUBCLASS 359 / 790
.~.~.~.~ With third component biconvex

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}
754  DF  .~ Multiple component lenses {6}
784  DF  .~.~ Three components {3}
785  DF  .~.~.~ + - + Arrangement {5}
790.~.~.~.~ With third component biconvex

DEFINITION

Classification: 359/790

With third component biconvex:

(under subclass 785) Subject matter wherein the third convergent component has a curved or rounded outward surface at the entrance and exit ends.

SEE OR SEARCH THIS CLASS, SUBCLASS:

778, for a four component lens having a single biconvex element in the + - - + component arrangement.

789, for a three component lens having a first biconvex component in the + - + component arrangement.