Patent ID: 6364490
Filing Date: 2002-04-02
Classification: G02B,G03B

Abstract:
A device for the production of a virtual image, comprising:a housing having a wall with an observation opening formed therein; an image source located in said housing; a fresnel lens arranged in said observation opening; imaging optics arranged in the housing for projecting light rays conveying said virtual image in a path from said image source onto said fresnel lens, said imaging optics having a concave mirror positioned in said path of said light rays between said image source and said fresnel lens; and a ray divider positioned between said concave mirror and said fresnel lens for reflecting said light rays from said image source onto said concave mirror and for transmitting said light rays from said image source onto said concave mirror and for transmitting said light rays from said concave mirror to said fresnel lens; a first projection device located within said housing and adapted to generate an image at said image source; anda second projection device adapted to project an image toward said ray divider, whereby a background virtual image is formed.