Optical: systems and elements – Having significant infrared or ultraviolet property – Lens – lens system or component
Patent
1999-04-12
2000-08-29
Henry, Jon
Optical: systems and elements
Having significant infrared or ultraviolet property
Lens, lens system or component
264 121, G02B 1314, G02B 100, B29D 1100
Patent
active
061116890
ABSTRACT:
Zinc sulfide and an optical component are provided that significantly reduces transmission for visible light and infrared rays of not more than 3 .mu.m in wavelength, having high transmittance for infrared rays in the wavelength range of 8-12 .mu.m, 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.degree. C. and the pressure of 150-800 kg/cm.sup.2. 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 .mu.m, 30% to 75% at the wavelength range of 8-12 .mu.m, and 50% to 90% at the same wavelength range with the formation of antireflection coating film.
REFERENCES:
patent: 5575959 (1996-11-01), Harris et al.
"Charaterization of Pore Size Distribution by Infred Scattering in Highly Dense ZnS", by chen, et al., Journal of the American Ceramic Society, Aug. 1993, vol. 76, No. 8.
Henry Jon
Sumitomo Electric Industries Ltd.
LandOfFree
Optical component, zinc sulfide sintered compact, and fabricatin does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical component, zinc sulfide sintered compact, and fabricatin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical component, zinc sulfide sintered compact, and fabricatin will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1255035