Colorless inorganic glass
The field of the present invention is colourless inorganic glasses which have a sharp optical absorption cutoff between 370 nm and 425 nm, as well as products manufactured from said glasses. The object of the present invention is colorless inorganic glasses, as well as products manufactured from sai...
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| Main Authors | , |
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| Format | Patent |
| Language | English |
| Published |
16.07.2002
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| Online Access | Get full text |
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| Summary: | The field of the present invention is colourless inorganic glasses which have a sharp optical absorption cutoff between 370 nm and 425 nm, as well as products manufactured from said glasses.
The object of the present invention is colorless inorganic glasses, as well as products manufactured from said glasses. Said glasses are of the type containing copper halides or copper cadmium halides and having a sharp optical absorption cutoff between 370 nm and 425 nmessentially having the composition below, expressed in cationic percentages:the Cl, Br and F contents being themselves expressed in percentages by weight of the total composition;with an adequate amount of reducing agent(s) which is (are) advantageously selected from SnO, AsO, SbO, and mixtures thereof, in order to have mainly, in said glasses, the copper in the form of cuprous ions (Cu), and therefore glasses which have neither a red coloration, nor a blue green coloration;and the residual yellow coloration of which is minimized. |
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