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Illumination system and projector adopting the same

  • US 20040012831A1
  • Filed: 10/10/2002
  • Published: 01/22/2004
  • Est. Priority Date: 10/12/2001
  • Status: Active Grant
First Claim
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1. An illumination system comprising:

  • an illumination unit which includes;

    at least one light emitting device which emits a light beam having a predetermined wavelength, and at least one holographic optical element which reduces a cross section of the light beam emitted from the light emitting device; and

    an optical path changer which changes a proceeding path of an incident light passing through the holographic optical element.

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