Atomic spectral lamp

Details Atomic spectral lamp Atomic spectral lamp

1981-03-13

1984-10-09

Moore, David K.

Electric lamp and discharge devices

Having heating means to control gas/vapor, gas or vapor...

Vapor generating

313612, H01J 1968

Patent

active

044764138

ABSTRACT:
An atomic spectral lamp of the type comprising a predominantly glass envelope in which are disposed spaced electrodes for producing an electrical discharge on application of a suitable potential difference thereto and a substance which, on being heated will yield a vapor of an element capable of emitting the resonance line or lines which characterize the lamp. In normal operation of the lamp, there exists between the anode and the cathode a temperature gradient effective to ensure that the vapor pressure of the elemental vapor adjacent the cathode is small relative to the vapor pressure of the elemental vapor in the vicinity of said substance. In another aspect, heating means is provided for heating the substance independently of the discharge to yield the elemental vapor within the envelope.

REFERENCES:
patent: 1935697 (1933-11-01), Davies et al.
patent: 1994306 (1935-03-01), Ewest et al.
patent: 2020726 (1935-11-01), Gaidies
patent: 2189636 (1940-02-01), Knowles et al.
patent: 2766395 (1956-10-01), Schumichen
patent: 2774013 (1956-12-01), Willoughby
patent: 2805365 (1957-09-01), Mulder
Engelhard and Bayer-Helms, "Cd and Hg Cathode Spectral Lamps for Interferometry," Metrologia 8, 91-96, (1972), No. 3, (Jul.).

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