US PATENT SUBCLASS 359 / 630
.~.~ Superimposing visual information on observer's field of view (e.g., head-up arrangement, etc.)

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  DF  .~ By partial reflection at beam splitting or combining surface {6}
630.~.~ Superimposing visual information on observer's field of view (e.g., head-up arrangement, etc.) {3}
631  DF  .~.~.~> Including curved reflector
632  DF  .~.~.~> Rotatable heads-up device or combiner
633  DF  .~.~.~> With additional reflector (e.g., serial reflections, etc.)

DEFINITION

Classification: 359/630

Superimposing visual information on observer's field of view (e.g., head-up arrangement, etc.):

(under subclass 629) Subject matter which forms a composite image by combining visual display information with the light incident on an observer's field of view.