Light-pervious, heat-reflecting filter and electric lamps having

Details Light-pervious, heat-reflecting filter and electric lamps having Light-pervious, heat-reflecting filter and electric lamps having

1977-10-27

1978-11-28

Grimm, Siegfried H.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Polarizer or special ray transmission

350 16, 350311, 427166, 427344, 427377, G02B 110, H01J 510, H01J 6140, H01K 126

Patent

active

041277899

ABSTRACT:
The life of light-pervious, thermal radiation-reflecting filters of tin-doped indium oxide is drastically elongated when used in oxidizing or reducing medium by coating the indium oxide layer with pyrolytic or hydrolytic silicon dioxide.

REFERENCES:
patent: 3666534 (1972-05-01), Groth et al.
patent: 3949259 (1976-04-01), Kostlin et al.
patent: 4017758 (1977-04-01), Almer et al.

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