High pressure discharge lamp with vessel having a UV radiation a

Details High pressure discharge lamp with vessel having a UV radiation a High pressure discharge lamp with vessel having a UV radiation a

1978-12-21

1981-12-22

Demeo, Palmer C.

Electric lamp and discharge devices

With temperature modifier

For envelope wall

313112, 313221, H01J 504, H01J 6130

Patent

active

043073158

ABSTRACT:
High-pressure discharge lamp according to the invention have a quartz glass lamp vessel (1) which consists locally of UV-absorbing quartz glass (shaded region 2). During operation of the lamps the normally colder wall parts of the lamp vessel in this region thus assume a higher temperature, as a result of which the efficiency of the lamp is increased while said regions (2) nevertheless remain transparent to visible radiation.

REFERENCES:
patent: 2291952 (1942-08-01), Dench
patent: 2326773 (1943-08-01), Floyd
patent: 2434980 (1948-01-01), Bilofsky
patent: 3451579 (1969-06-01), Bishop
patent: 3848152 (1974-11-01), Schultz
patent: 3851200 (1974-11-01), Thomasson
patent: 3900750 (1975-08-01), Bamberg et al.
patent: 3963951 (1976-06-01), Bamberg

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