Reflector, projective display and projector

Reflector, projective display and projector

  • CN 100,495,080 C
  • Filed: 08/12/2004
  • Issued: 06/03/2009
  • Est. Priority Date: 08/18/2003
  • Status: Active Grant
First Claim
Patent Images

1. catoptron, the reflectance coating on the inner face that possess the main body of holding light source, is formed on aforementioned body is characterized in that:

  • Aforementioned body is by with SiO 2For principal ingredient, the glass that contains at least a rare earth element among Sc, Y, La, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, the Lu constitute, The thermal expansivity of above-mentioned glass is less than 40 * 10 -7/ ℃

    , transition temperature is greater than 500 ℃

    , Comprise Li and Na, and be scaled the Li of oxide 2O/Na 2The ratio of O is 0.3~

    0.7, Wherein, the total amount of alkali oxide is 10 weight % or following,Above-mentioned glass contains at least;

    the SiO of 50~

    70 weight % 2, the B of 5~

    15 weight % 2O 3, the Al of 10~

    25 weight % 2O 3, the R of 0~

    5 weight % 2O, the ReO of 0~

    10 weight %, wherein R is an alkaline metal, Re is an alkaline-earth metal.

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