Double-bore capillary-tube gas discharge lamp with an envelope w

Details Double-bore capillary-tube gas discharge lamp with an envelope w Double-bore capillary-tube gas discharge lamp with an envelope w

1987-05-26

1989-03-07

Boudreau, Leo H.

Electric lamp and discharge devices

With gas or vapor

Having baffle, partition, or constricting means affecting...

313634, H01J 6110, H01J 6130

Patent

active

048109240

ABSTRACT:
An improved gas discharge lamp having (i) a cylindrical quartz envelope with (ii) a flat circular disk magnesium fluoride window substantially transparent to short wavelength light at one end of the cylindrical envelope, (iii) two tungsten or molybdenum electrodes each of which is sheathed in a capillary tube, and (iv) a partition within the envelope and between the tube-sheathed electrodes which partition defines, in combination with the envelopes, a bore about each of the electrodes and its sheating tube. A gas discharge path between the electrodes produces bright light spots at the capillary tube orifices, at a region of the lamp proximate the window. The windowed quartz envelope is inexpensive to manufacture. The partition imparts strength and maintains the capillary tubes in precise alignment during manufacture. The tungsten or molybdenum electrodes support high currents providing high illumination. The flat magnesium fluoride window passes undistorted short wavelength light particularly suitable for use in instrumentation.

REFERENCES:
patent: 3928786 (1975-12-01), Campbell
patent: 4002922 (1977-01-01), Young
patent: 4208618 (1980-06-01), Heine
patent: 4524301 (1985-06-01), Cohen et al.
Capillary Lamps/Vacuum to UV Line Spectra ZN Lamps, CD Lamps/VU Line Spectra, Scientific Services Co.
VUV Source for Photoionization Detector, Scientific Services Co.

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