Polarisers and mass-production method and apparatus for polarisers
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United States of America Patent
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Issued Date -
Dec 19, 2002
app pub date -
Mar 11, 2002
filing date -
Mar 12, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of mass producing polarizes comprises designing by rigorous diffraction theory an optimized grating profile, replicating the profile in a polymer or other substrate, and slope evaporating a metal onto the substrate. The angle of slope evaporation, the metal, and the thickness of the metal are optimized for a given wavelength using rigorous diffraction theory. The polarizer may be coated with a protective coating, such as an acrylic based lacquer or Magnesium Fluoride (MgF.sub.2). The optical effect of the coating is also taken into account in the design using rigorous diffraction theory.
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