H - Electricity – 01 – J
Patent
H - Electricity
01
J
313/126, 313/136
H01J 61/10 (2006.01) H01J 61/30 (2006.01)
Patent
CA 1299231
A B S T R A C T 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 sheathing 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.
588605
Gowling Lafleur Henderson Llp
Jelic Marinko
LandOfFree
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