US PATENT SUBCLASS 359 / 629
.~ By partial reflection at beam splitting or combining surface

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

618  DF  SINGLE CHANNEL SIMULTANEOUSLY TO OR FROM PLURAL CHANNELS (E.G., LIGHT DIVIDING, COMBINING, OR PLURAL IMAGE FORMING, ETC.) {3}
629.~ By partial reflection at beam splitting or combining surface {6}
630  DF  .~.~> Superimposing visual information on observer's field of view (e.g., head-up arrangement, etc.) {3}
634  DF  .~.~> Wavelength selective (e.g., dichroic mirror, etc.)
635  DF  .~.~> Drawing or plotting aid
636  DF  .~.~> Including full reflection and transmission of a beam at different portions of a beam divider
637  DF  .~.~> With path length or aberration correcting element
638  DF  .~.~> With partial reflection at a surface of a prism

DEFINITION

Classification: 359/629

By partial reflection at beam splitting or combining surface:

(under subclass 618) Subject matter including a surface which transmits and reflects substantial portions of the incident light.

SEE OR SEARCH THIS CLASS, SUBCLASS:

583, for a beam splitter which selectively separates the incident light by interference in a coating or lamina of an optical element.