Arc tube having particular volume and gas pressure for luminous

Details Arc tube having particular volume and gas pressure for luminous Arc tube having particular volume and gas pressure for luminous

1993-03-09

1995-03-28

O'Shea, Sandra L.

Electric lamp and discharge devices

With gas or vapor

Having a particular total or partial pressure

313571, 313637, 313639, 313642, H01J 1720

Patent

active

054020379

ABSTRACT:
An arc tube for a discharge lamp unit which emits light which is suitable in luminous flux, color temperature, and chromaticity. The arc tube is composed of a closed glass ball in which electrodes confront one another and which is sealingly charged with light emitting materials, namely, mercury and a metal iodide of NaI and ScI.sub.3 groups together with Xe inert gas. In accordance with the invention, the closed glass ball has a volume of 20 to 50 .mu.l, the density of the mercury in the closed glass ball is in a range of 2.times.10.sup.-2 to 4.times.10.sup.-2 mg/.mu.l, the density of the metal iodide is in a range of 6.times.10.sup.-3 to 12.times.10.sup.-3 mg/.mu.l, and the charged Xe gas pressure is 3 to 6 atm. These ranges make it possible to readily manufacture on a large scale arc tubes which are substantially equal in performance, being substantially uniform in tube voltage, luminous flux, color temperature and chromaticity.

REFERENCES:
patent: 4247798 (1981-01-01), Howe et al.
patent: 5126619 (1992-01-01), Wakimizu et al.
patent: 5250872 (1993-10-01), Wakimizu et al.
patent: 5277639 (1994-01-01), Nagata et al.
Lamps and Lighting, Third Edition by Marsden 1933 pp. 210-223.

Affiliated with

Also associated with

Rating

Arc tube having particular volume and gas pressure for luminous does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Arc tube having particular volume and gas pressure for luminous , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Arc tube having particular volume and gas pressure for luminous will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2253145