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Light deflection element and light source apparatus using the same

  • US 7,401,962 B2
  • Filed: 07/13/2006
  • Issued: 07/22/2008
  • Est. Priority Date: 01/31/2002
  • Status: Active Grant
First Claim
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1. A light deflector comprising a light entrance surface on which light is incident and a light exit surface located on an opposite side relative to said light entrance surface and allowing the incident light to exit therefrom, wherein said light entrance surface is formed with a plurality of elongated prisms arrayed substantially parallel to each other and each composed of two prism surfaces, at least one of said prism surfaces of each of the elongated prisms comprises at least three flat reflecting surfaces having mutually different inclination angles, and any one of said flat surfaces located on a side closer to said light exit surface has a larger inclination angle.

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