| 摘要 |
PROBLEM TO BE SOLVED: To provide a member to form polarized ultraviolet excellent in thinness and in lightness and easy to manipulate, which has a wide range of selection of an oriented film formation material and which causes almost no exothermic reaction and deterioration, by facilitating polarization formation in a large area and utilizing a wide wavelength range of ultraviolet light. SOLUTION: In an ultraviolet transmissive film 11 formed of an ultraviolet transmissive material, micro-areas 12 formed of the other ultraviolet transmissive material with a different double refractive characteristic are dispersed and distributed. Refractive index differencesΔn1,Δn2 of the ultraviolet transmissive film 11 and the micro-areas 12 to ultraviolet are not less than 0.05 and not more than 50% ofΔn1 in the axial direction of maximizingΔn1,Δn2 and that of minimizing them, respectively. An ultraviolet polarizer 1 has the micro-areas 12 whose length in theΔn1 direction is 0.1-100μm, and a polarized ultraviolet light source device has the ultraviolet polarizer 1 in a light-emitting surface of an ultraviolet radiating device. Accordingly, polarized ultraviolet, excellent in a life and easy to manipulate in a slim form, can be formed simply by being set in the ultraviolet radiating device.
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