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Half mirror

  • US 6,556,350 B2
  • Filed: 10/02/2001
  • Issued: 04/29/2003
  • Est. Priority Date: 10/03/2000
  • Status: Expired due to Fees
First Claim
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1. A half mirror comprising:

  • a substrate that at least transmits light having predetermined wavelengths;

    a reflecting film, comprising substantially silicon of a thickness of 20 to 45 nm and being integrally formed on a surface of said substrate, for reflecting light that is made incident upon the reflecting film from the substrate side thereof and transmitting, toward said substrate side of the reflecting film at a fixed ratio, light made incident upon the reflecting film from the side opposite to the substrate side; and

    a protective film, which is made of a translucent material that at least transmits light having particular wavelengths, formed on the surface of said reflecting film opposite to the surface on which said substrate is formed.

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