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OPTICAL DEVICE, AND VIRTUAL IMAGE DISPLAY DEVICE

  • US 20100220295A1
  • Filed: 05/12/2010
  • Published: 09/02/2010
  • Est. Priority Date: 03/29/2004
  • Status: Active Grant
First Claim
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1. An image display device comprising:

  • a light source;

    a reflection spatial optical modulator to reflect a pencil of rays emitted from the light source;

    a reflection optical element to reflect the reflected light from the reflection spatial optical modulator;

    an optical lens to refract the reflected light from the reflection optical element;

    a quarter waveplate;

    a polarizing beam splitter; and

    a light-guiding optical system,the optical lens projecting the reflected light from an arbitrary position on the reflecting surface of the reflection spatial modulator as parallel pencil groups;

    the light-guiding optical system totally reflecting the parallel pencil groups inside it and then projecting it as they are;

    the light source, reflection spatial optical modulator, reflection optical element and optical lens being disposed near or in close contact with four optical surfaces, respectively, of the polarizing beam splitter; and

    the quarter waveplate being disposed between the reflection optical element and polarizing beam splitter.

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