G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 1/00 (2006.01) C04B 35/547 (2006.01) G02B 1/02 (2006.01) G02B 5/20 (2006.01) G02B 13/14 (2006.01)
Patent
CA 2268492
Zinc sulfide and an optical component are provided that significantly reduce transmission of visible light and infrared rays of not more than 3 µm in wavelength, having high transmittance for infrared rays in the wavelength range of 8-12 µm, and that shields visible light. The optical component is constituted by a polycrystalline zinc sulfide sintered compact formed by hot compression molding fine zinc sulfide powder of high impurity at the temperature of 900-1000°C and the pressure of 150-800 kg/cm2. The light transmittance at the region where the thickness is 2 mm is 0% to 3% at the wavelength range of visible light, 0% to 20% at the wavelength range of 2.5-3 µm, 30% to 75% at the wavelength range of 8-12 Nm, and 50% to 90% at the same wavelength range with the formation of antireflection coating film.
G. Ronald Bell & Associates
Sumitomo Electric Industries Ltd.
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