High intensity far u.v. radiation source专利检索-高强度放电灯气体放电灯灯光专利检索查询-专利查询网

High intensity far u.v. radiation source

阅读：677发布：2021-11-13

专利汇可以提供High intensity far u.v. radiation source专利检索，专利查询，专利分析的服务。并且A far U.V. radiation source emitting high intensity of U.V. at wavelengths principally shorter than 2,000 A.U. includes an electric discharge in a low pressure of mercury vapor at a pressure 2x10 3 to 0.1 torr and krypton gas at a pressure of approximately 0.5-10 torr. During operation, lamp current is very high, in range of 0.5 to 40 ampere/cm.2, emitting principally at a wavelength of 1,942 A.U.，下面是High intensity far u.v. radiation source专利的具体信息内容。

权利要求

1. A far ultraviolet emitting lamp comprising a. an evacuable bulb having an ultraviolet emissive portion in which at least a portion oF the bulb is transmissive of ultraviolet radiation of wavelengths shorter than 2,000 A.U.; b. a filling within said envelope including b1. a partial pressure of a material selected from the group consisting of krypton and xenon noble gas with the range of approximately 0.5 to 25 torr, and b2. a quantity of mercury sufficient, under lamp operating conditions wherein the coldest portion of the lamp bulb interior is maintained at a temperature of approximately 25* to 80* C, to maintain within said bulb a partial pressure of mercury of approximately 2 X 10 3 to 0.1 torr; c. means for coupling to said filling a voltage sufficient to ionize said krypton and establish an electric discharge therein, said discharge comprising krypton and mercury; d. said discharge comprising ionized mercury which when excited by current densities of approximately 0.5 to 100 amperes/cm.2 emits ultraviolet radiation at wavelengths shorter than 2,000 A.U. as the principal emission thereof.

2. The lamp of claim 1 wherein said current density is at least 10 amperes/cm.2 and said radiation is principally at 1, 942 A.U.

3. The lamp of claim 1 wherein said current density is in excess of 10 amperes/cm.2 and a significant proportion of said ultraviolet radiation is at 1,650 A.U.

4. The lamp of claim 3 wherein at least a portion of said bulb wall in the region of the discharge positive column is sapphire.

5. The lamp of claim 1 wherein said noble gas is present within said bulb at a pressure of approximately 2-4 torr.

6. The lamp of claim 1 and further including a pair of indirectly heated electrodes for sustaining an alternating current discharge within said bulb.

7. The lamp of claim 1 and further including a pair of electrodes, one of which is a thermionically emissive cathode for sustaining a direct current discharge within said bulb.

8. The lamp of claim 1 wherein said means for coupling a voltage with said filling is located externally of said bulb and is inductively coupled therethrough.

9. The lamp of claim 1 wherein said noble gas is krypton.

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