Halogen lamp envelope with roughened surface area and optical fi

Details Halogen lamp envelope with roughened surface area and optical fi Halogen lamp envelope with roughened surface area and optical fi

1988-12-09

1990-10-23

Yusko, Donald J.

Electric lamp and discharge devices

With temperature modifier

For lead-in-seal or stem protection

313 41, 313111, 313112, 313578, 313579, H01J 516

Patent

active

049654853

ABSTRACT:
A halogen lamp having a translucent glass envelope containing a halogen-containing gas sealed therein and including an outer surface and a connection end. The lamp further has a tungsten filament sealed within the envelope for generating light containing visible light and infrared rays, lead-in conductors for connecting the lamp to a source of electricity, molybdenum foils embedded within the connection end of the envelope for electrically connecting the filament to the lead-in conductors and an optical film coated on at least a portion of the envelope for reflecting the infrared rays and transmitting the visible light, the reflected infrared rays generating heat within the envelope which is transmitted by conduction through the envelope, the envelope also including a roughened area free from the optical film on the outer surface between the optical film and the connection end for interrupting the transmission of the heat through the envelope to the molybdenum foils.

REFERENCES:
patent: 1599241 (1926-09-01), Mery
patent: 4524410 (1985-06-01), Kawakatsu et al.
patent: 4634919 (1987-01-01), Yuge et al.
patent: 4677338 (1987-06-01), Dixon et al.

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