Pulsed metal or metal halide lamps for photocopying applications专利检索-金属卤化物灯高强度放电灯气体放电灯光源手电筒灯光专利检索查询-专利查询网

Pulsed metal or metal halide lamps for photocopying applications

阅读：447发布：2022-02-18

专利汇可以提供Pulsed metal or metal halide lamps for photocopying applications专利检索，专利查询，专利分析的服务。并且A low pressure metal or metal halide vapor lamp for photocopying applications. In a preferred embodiment, a low pressure sodium vapor lamp is operated in a pulsed mode, providing illumination of increased brightness and of a color (yellow) which is optimum for providing a copy which is an accurate representation of the original.，下面是Pulsed metal or metal halide lamps for photocopying applications专利的具体信息内容。

权利要求

1. APPARATUS FOR FORMING A LATENT ELECTROSTATIC CHARGE PATTERN ON A PHOTOCONDUCTIVE INSULATING MEDIUM, SAID LATENT ELECTROSTATIC CHARGE PATTERN CORRESPONDING TO THE RADIATION PATTERN PROJECTED FROM AN INFORMATION BEARING MEMBER COMPRISING: A CHARGED PHOTOCONDUCTIVE INSULATING MEMBER, A LOW PRESSURE METAL VAPOR SOURCE FOR GENERATING RADIATION OF A PREDETERMINED SPECTRAL LINE, SAID INFORMATION BEARING MEMBER BEING INTERPOSED IN THE OPTICAL PATH BETWEEN SAID METAL VAPOR SOURCE AND SAID CHARGED PHOTOCONDUCTIVE INSULATION MEMBER, AND MEANS FOR OPERATING SAID LOW PRESSURE METAL VAPOR SOURCE IN A PULSED MODE WHEREBY PLUSES OF RADIATION ARE EMITTED THEREFORM, A RADIATION PULSE EXPOSING SAID INFORMATION BEARING MEMBER TO SELECTIVELY DISSIPATE TUBE CHARGE ON THE SURFACE OF SAID PHOTOCONDUCTIVE INSULATING MEMBER IN ACCORDANCE WITH THE INTENSITY OF THE RADIATION PULSE PROJECTED FROM SAID INFORMATION BEARING MEDIUM TO FORM SAID LATENT ELECTROSTATIC CHARGE PATTERN.

2. The apparatus as defined in claim 1 wherein said low pressure metal vapor source comprises a metal halide vapor source.

3. The apparatus as defined in claim 1 wherein said low pressure metal vapor source comprises a sodium vapor lamp.

4. The apparatus as defined in claim 3 wherein said low pressure sodium vapor lamp comprises: an envelope having spaced-apart electrodes and low pressure sodium vapor therein, means for coupling a voltage of an amplitude below the breakdown voltage of said sodium vapor across said lamp electrodes, and means for applying a voltage to said lamp of an amplitude sufficient to cause said sodium vapor to breakdown whereby a radiation pulse is emitted therefrom.

5. The apparatus as defined in claim 4 further including means for heating the sodium vapor within said envelOpe.

6. The apparatus as defined in claim 5 wherein each radiation pulse is generated for a period in the range from about 30 microseconds to about 1,000 microseconds and in the energy density range from about 10 4 to about 10 2 joules per square centimeter.

7. The apparatus as defined in claim 6 wherein the pressure of the sodium vapor within said envelope is approximately 0.01 Torr.

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