Patent ID: 6392812
Filing Date: 2002-05-21
Classification: G02B

Abstract:
A head up display system, comprisingan image generator arranged to generate an image, a combiner, and an optical sub-system disposed between the image generator and the combiner having a prism comprising first and second reflective surfaces and a mirror having a mirror surface, the prism and the mirror being arranged to convey a generated image from the image generator to the combiner, wherein the prism is arranged to internally reflect a generated image from a first portion of the first reflective surface towards a first portion of the second reflective surface arranged to internally reflect the image through a second portion of the first reflective surface arranged to allow the image to pass therethrough for reflection by the mirror surface of the mirror that is arranged to reflect the image back through the second portion of the first reflective surface and through a second portion of the second reflective surface, arranged to allow the image to pass therethrough, to a reflective surface of the combiner, arranged to overlay the image on a scene viewed through the combiner.