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Image combiner and image display device

  • US 8,035,872 B2
  • Filed: 06/20/2005
  • Issued: 10/11/2011
  • Est. Priority Date: 06/29/2004
  • Status: Active Grant
First Claim
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1. An image combiner comprising:

  • a lens element, including a convex lens and a concave lens, that guides a light flux from an image forming means;

    a substrate disposed in front of a user'"'"'s eye, the substrate being transparent to visible light, and introducing the light flux emitted from the lens element;

    a reflection region inner-reflecting the light flux introduced from the image forming means into the substrate, the reflection region being a part of one surface of the substrate; and

    a polarization beam splitter to which the light flux reflected at the reflection region enters twice and which makes the light flux entering for a second time incident on the user'"'"'s eye outside the substrate, the polarization beam splitter being installed in the substrate, whereinat least an angle θ

    0 between a line that is perpendicular to the reflection region and a principal ray of a portion flux of the light flux that directly enters the user'"'"'s eye satisfies a condition of 3°



    θ

    0, the portion flux being a flux emitted from a center of a display surface of the image forming means; and

    an inclination direction of the light flux heading into the user'"'"'s eye relative to the line that is perpendicular is set so to make a display position of a virtual image of the display surface to be at a position in an obliquely downward direction from the user'"'"'s eye.

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