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Image projection arrangement

DC
  • US 4,969,730 A
  • Filed: 03/22/1989
  • Issued: 11/13/1990
  • Est. Priority Date: 10/13/1988
  • Status: Expired due to Term
First Claim
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1. An image projection arrangement comprising a light source for producing a first light beam, a reflective image display system arranged in the path of the first light beam and having at least one image display panel for generating an image to be projected, a projection lens system arranged in the path of a second light beam originating from the image display system for projecting the image produced by the image display system onto a projection screen, characterized in that between the light source and the image display system on the one hand and between this system and the projection lens system on the other hand a transition from a first to a second medium is provided, these media having different refractive indices, the transition being arranged such that one of the first and second light beams is totally reflected by the transition whilst the other light beam is transmitted by the transition.

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