| 摘要 |
PROBLEM TO BE SOLVED: To provide a polarizer which is reduced in optical anisotropy by double refraction, high in extinction ratio, is low in insertion loss, and excellent in reliability. SOLUTION: Dielectric layers 5, in which metallic particles 4a having optical absorption anisotropy are dispersed are disposed in >=1 layers on at least one main surface of a dielectric substrate 2 having translucency. The dielectric substrate 2 and the dielectric layers 5 are formed of material of <=3.1×10<-8> cm<2> /N in optical elasticity constant to the light wavelength to be transmitted. According to such polarizer, the setting of the material having an optimum modules of elasticity according to the magnitude of stresses is made possible, thereby, the optical anisotropy by the double refraction of the dielectric layers 5 is reduced and, therefore, the polarization characteristic of the element may be made better than heretofore even under severe environment conditions.
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