UV-blocking filter comprising a layer of temperature stable...

Details UV-blocking filter comprising a layer of temperature stable... UV-blocking filter comprising a layer of temperature stable...

2005-09-22

2008-12-16

Pritchett, Joshua L (Department: 2872)

Optical: systems and elements

Having significant infrared or ultraviolet property

Having ultraviolet absorbing or shielding property

Reexamination Certificate

active

07466480

ABSTRACT:
The UV-blocking filter is a disk-shaped glass body made of borosilicate float glass, which has a layer of silver-containing diffusion paint adhering to it, which blocks ultraviolet light, so that the UV-blocking filter resists a high thermal load up to temperature of about 500° C. The preferred borosilicate float glass has a composition, in percent by weight, of SiO2, 81; B2O3, 13; Σ Na2O+K2O, 4; and Al2O3, 2. The preferred diffusion paint is a red-brown mordant, which contains 44.0 percent by weight of copper-II-sulfate-5-hydrate, 25.0 percent by weight Ag2O, Fe, and Ba.

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Schott Glaslexikon; Heinz G. Pfaender, 1997.
Schott: Glass Made of Ideas, Data Sheet, Nov. 12, 2007 (In English).
Schott Duran Produktions GMBH & Co. KG, Batch Certificate of Performance, Mar. 13, 2004 (In German and English).
Schmelzfarben GMBH: Safety Data Sheet, Aug. 12, 2007, pp. 1-6 (In English).

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