Light-transmitting, thermal-radiation reflecting filter

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

1974-08-09

1976-04-06

Newsome, John H.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Polarizer or special ray transmission

350 1, 427166, 427168, 427343, 427377, 428432, H01J 6140, H01K 126

Patent

active

039492591

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 percent of tin, calculated with respect to the number of indium atoms, has a free-electron density between 10.sup.21 and 3 times 10.sup.21 per cm.sup.3 and a plasma wavelength of less than 1.2.mu.m. 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 indium oxide, at a temperature between 300.degree.C and the softening temperature of the support material in a gas having an oxygen partial pressure of less than 10.sup..sup.-7 atmosphere.

REFERENCES:
patent: 3400288 (1968-09-01), Groth
patent: 3666534 (1972-05-01), Groth et al.
Groth et al., K "Philips Tech. Rev." V26 (1965), pp. 105-111.
Vossen, "RCA Review" Vol. 32 (June 1971), pp. 289-296.
Fraser et al., "J. Electrochem. Soc." Vol. 119 (Oct. 1972), pp. 1368-1374.

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