| 摘要 |
An arc discharge lamp (10) having an arc tube (12) containing an arc generating and sustaining medium (13) and first and second spaced apart electrodes (14, 16), respectively. An envelope (18) surrounds the arc tube (12) and contains an atmosphere (19) within it. The atmosphere is of a composition and pressure that will provide a burst of UV radiation in response to a spark generated within the envelope (18) and, in a preferred embodiment of the invention, is selected from argon or nitrogen (with nitrogen being preferred) at a pressure of from 150 to 400 torr. First and second electrical lead-ins (20, 22) are sealed within the envelope (18), with the first lead-in (20) being electrically connected to the first electrode (14) and the second lead-in (22) being connected to the second electrode (16), for example, by connector wire (22a). Means (30) is contained within the envelope (18) and exposed to the atmosphere (19) for generating a UV-producing spark within the atmosphere (19). As shown in the embodiment of FIG. 1 the means (30) comprises an isolated pin (24) mounted in the seal area (26) of the arc tube (12) adjacent the first electrode (14), a resistor (28) electrically connected between the second lead-in (22) and the isolated pin (24). A spark gap G is formed between the first electrode (14) and the isolated pin (24).
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