| 摘要 |
PROBLEM TO BE SOLVED: To provide a polarization diffraction grating which diffracts an incident light wave, while reducing its polarization ellipticity by a large amount. SOLUTION: A thermally stable anisotropic grating, having a special molecular array structure, is formed by irradiating polymer liquid crystal having an optical cross-linking function with interference light of two light waves having a polarization ellipticity of 0.05 to 0.5 and mutually orthogonal azimuths. COPYRIGHT: (C)2009,JPO&INPIT
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