High-pressure discharge lamp with optimized discharge vessel

Details High-pressure discharge lamp with optimized discharge vessel High-pressure discharge lamp with optimized discharge vessel

1992-07-07

1994-11-29

Yusko, Donald J.

Electric lamp and discharge devices

With gas or vapor

Envelope with particular structure

313571, 313573, 313642, H01J 1716, H01J 6130

Patent

active

053693345

ABSTRACT:
To optimize operating conditions with respect to overall size of a high-psure discharge lamp having a metal halide fill, the wall thickness (d) in millimeters is selected in accordance with a theoretical optimum relationship of d=1.5+0.1.times..cuberoot.P, in which P is the power rating of the lamp, in watts. The optimal theoretical thickness should not vary by more than .DELTA.d=.+-.0.2.times..sup.d, in millimeters, from the theoretical optimal value, with lower power ratings permitting a thinner wall thickness than higher power ratings. Optimizing the wall thickness improves the color rendition index and the light distribution of the emitted light, as well as decreasing the devitrification of the quartz glass of the discharge vessel.

REFERENCES:
patent: 3382396 (1968-05-01), Holmes et al.
patent: 3621322 (1971-11-01), Rehmet et al.
patent: 4968916 (1990-11-01), Davenport et al.
patent: 5028843 (1991-07-01), Narita

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