Method for manufacturing an electrodeless lamp
AssigneeCeravision Technology Limited
InventorsFloyd R. Pothoven, Terry A. Pothoven
Life of this patent
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Abstract
The lamp consists of a hollow tubular body 1 with a closed end 2 and an open end 3. The body is of sintered ceramic material. A window 4 is sealed across the open end, the window and the body being united by a layer of frit 5. The window is of sapphire. Within the body is sealed an inert gas atmosphere 6 and a pellet charge of excitable material 7. In use, the lamp is subjected to RF electromagnetic radiation which heats it to 1000° C. causes it to emit visible light via the sapphire.
Claims6
A method of production of an electrodeless lamp of the type comprising a hollow body of ceramic material having an open end and containing a charge of excitable material with a given melting point, a translucent closure at the open end of the body and a seal between the body and the closure, the seal being of fused material having a fusing point higher than that of the excitable material, the method consisting in the steps of:
- applying frit material to the open end of the hollow body prior to sealing;
- inserting the charge of excitable material into the hollow body;
- positioning the translucent closure across the open end of the hollow body;
- applying laser irradiation to the frit material through the translucent closure, to locally raise its temperature to its fusing point for sealing of the window to the body without causing the excitable material to melt.
Dependencies are inferred from the claim text.