High pressure mercury discharge lamp

Details High pressure mercury discharge lamp High pressure mercury discharge lamp

1993-04-12

1996-03-05

O'Shea, Sandra L.

Electric lamp and discharge devices

With gas or vapor

Envelope with particular structure

313571, 313639, 313642, H01J 1716, H01J 6130

Patent

active

054970490

ABSTRACT:
The high pressure mercury discharge lamp comprises a quartz glass lamp vessel (1) having a region (2) surrounding a discharge space (3), spaced-apart tungsten electrodes (4) defining a discharge path (5) disposed in the lamp vessel, and connected to current conductors (6) which extend from the lamp vessel to the exterior and a filling of mercury, rare gas and bromine. The lamp has an operating pressure of at least about 200 bar. The discharge space (3) is spheroidal in shape and has specified dimensions. The lamp consumes a power of 70 to 150 W. The lamp has favourable properties which render the lamp suitable for use in optical systems, e.g. for projection purposes.

REFERENCES:
patent: 4161672 (1979-07-01), Cap et al.
patent: 4612475 (1986-09-01), Downing
patent: 4686419 (1987-08-01), Block et al.
patent: 5028843 (1991-07-01), Narita
patent: 5109181 (1992-04-01), Fischer et al.
patent: 5128589 (1992-07-01), Dakin
patent: 5239230 (1993-08-01), Mathews et al.

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