Image intensifier tube employing a microchannel electron multiplier专利检索-微通道板微电子学专利检索查询-专利查询网

Image intensifier tube employing a microchannel electron multiplier

阅读：27发布：2021-08-02

专利汇可以提供Image intensifier tube employing a microchannel electron multiplier专利检索，专利查询，专利分析的服务。并且In an image intensifier tube, photon images received by a photocathode are converted into electron images which are accelerated by an accelerating anode and focused upon the input face of a microchannel electron multiplier. The multiplier multiplies the current of the electron images and the output electron images are directed onto the output flourescent screen. The operating voltages for the photocathode, and anode are referenced to the potential applied to the electron multiplier such that variations in the potential applied across or to the electron multiplier do not produce changes in magnification. The anode is biased positive with respect to the microchannel plate to form an ion trap to inhibit flow of ions from the electron multiplier to the photocathode, thereby avoiding bright spots in the output image. Voltage divider resistors are provided in the anode bias and photocathode bias circuits for dropping the anode potential generally in proportion to the drop in the photocathode potential experienced at high input light levels to prevent cut off of the image.，下面是Image intensifier tube employing a microchannel electron multiplier专利的具体信息内容。

权利要求

1. In an image intensifier tube, a photocathode means disposed to receive a photon image for emitting into the tube an electron image corresponding to the received photon image, microchannel electron multiplier means having an input face disposed to receive the emitted electron image for multiplying the electron current of said image, an anode electrode means disposed intermediate said photocathode means and said microchannel multiplier means along the path of flow of the electron image for accelerating the electron image and for focusing same upon said electron receiving the face of said microchannel electron multiplier means, and power supply means for biasing said anode electrode means at a potential positive with respect to the operating potential of said input face of said microchannel electron multiplier means to inhibit the flow of positive ions from said microchannel multiplier means to said photocathode means, said biasing means for biasing said anode means relative to said microchannel electron multiplier means include, a series connection of a voltage regulating means and a resistor to form a source of regulated anode bias potential connected in parallel with the potential applied across said microchannel electron multiplier means, and means for applying the regulated anode bias potential derived across said voltage regulator means to said anode means.

2. The apparatus of claim 1 wherein said voltage regulating means includes a Zener diode.

3. The apparatus of claim 1 wherein said means for applying the voltage derived across said voltage Regulator means to said anode means includes, anode resistive means connected in series beteen said anode means and said source of regulated anode bias potential.

4. The apparatus of claim 3 including, cathode bias means for biasing said photocathode means at a potential negative with respect to the potential of the input face of said microchannel electron multiplier means, and cathode resistive means connected in series with said cathode bias means between said photocathode means and said microchannel electron multiplier means.

5. The apparatus of claim 4 wherein said anode resistive means and said cathode resistive means form a voltage divider when said anode intercepts substantial electron image current emitted from said photocathode means, and said cathode resistive means being substantially more resistive than said anopde resistive means.

6. The apparatus of claim 5 wherein the resistances of said cathode resistive means and said anode resistive means are proportioned such that the ratio of the anode resistance Ra to the cathode resistance Rc is approximately equal to or within 50% greater than the ratio of the anode source potential Va to the cathode source potential Vc.

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Image intensifier tube employing a microchannel electron multiplier

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