Light-transmitting, thermal-radiation reflecting filter

Details Light-transmitting, thermal-radiation reflecting filter Light-transmitting, thermal-radiation reflecting filter

F - Mech Eng,Light,Heat,Weapons

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F21V 7/00 (2006.01) F21V 7/22 (2006.01) G02B 5/20 (2006.01) H01J 61/40 (2006.01)

Patent

CA 1037707

ABSTRACT: A light-transmitting, thermal-radiation reflecting filter which comprises a transparent support coated with indium oxide which is doped with more than 7 atomic per cent of tin, calculated with respect to the number of indium atoms, has a free- electron density between 1021 and 3 times 1021 per cm3 and a plasma wavelength of less than 1.2/um. The filter can be manufactured so as to have a stress-free support by heating a support, which is coated in known manner with tin-doped indiumoxide, at a temperature between 300°C and the softening temperature of the support material in a gas having an oxygen partial pressure of less than 10-7 atmosphere. -15-

206860

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