Claims
- 1. A picture element array image intensifier tube and system for direct viewing of an image of an external scene, the tube and system comprising:
- an input imaging means for presenting said image of an external scene over the input side of a transparent input faceplate;
- a continuous layer of photocathode material on the inside of said transparent input faceplate;
- a first microchannel plate electron multiplier having a continuous input electrode in proximity focus with said continuous layer of photocathode material and having as an output electrode an array of electrically isolated parallel output electrode metallic stripes;
- a second microchannel plate electron multiplier having as an input electrode an array of electrically isolated parallel input electrode metallic stripes and having a continuous output electrode;
- an output means comprising a phosphor electrode in proximity focus with said continuous output electrode of said second microchannel plate electron multiplier for direct viewing of an intensified replica of said image of an external scene and an output circuit connected to said phosphor electrode for presenting digitized current intensity from each picture element of said picture element array;
- a first microchannel plate output electrode array switching means;
- a second microchannel plate input electrode array switching means;
- tube electronic means having power supply bias voltages that are applied to image intensifier tube elements and array switching drivers for activating said switching means for selectively switching said bias voltages in some scan mode over individual stripe of said first microchannel plate output electrode array stripes and over individual stripes of said second microchannel plate input electrode array stripes and further having position scan data timing pulses produced in synchronism with activation of said switching means; and
- process control electronic means having a built-in program therein and having as a first input said digitized current intensity from each picture element and having as a second input said position scan data timing pulses in synchronism with activation of each picture element by said switching drivers to produce a video type signal and for analysis of each picture element on a digital frame-to-frame basis by comparison of said built-in program with digitized current intensity from each picture element in which said process control electronic means has first, second, and third outputs therefrom wherein said first output is a difference signal that is applied to an external display device and said second output activates a symbology generator according to said built-in program for applying symbology bias voltages through said tube electronic means to said first microchannel plate output electrode array and said second microchannel plate input electrode array and said third output comprises feedback of decisions based on comparison of said built-in program with said digitized current intensity in which said decisions are applied to said tube electronic means for changing said bias voltage to enhance said intensifier image.
- 2. A tube and system as set forth in claim 1 wherein said input image means is an objective lens.
- 3. A tube and system as set forth in claim 1 wherein said input imaging means are infrared scanners having optical and system electronic means comprising:
- an objective lens for imaging target radiation from the field-of-view of some external scene;
- a photodetector array;
- a flat two-reflective side infrared scanning mirror positioned with the front side thereof in the optical path between said objective lens and said photodetector array and having a central scan axis about which said scan mirror oscillates to sweep said photodetector array across the field-of-view of said external scene;
- a plurality of light emitting diodes forming an array that is matched element-for-element to said photodetector array;
- system electronic means for processing the signals from said photodetector array and having first, second, and third outputs therefrom wherein said first output drives said light emitting diode array and said second output drives said scan mirror about its central scan axis at a rate faster than the human eye can detect and said third output is synchronizing pulses applied to said tube electronics to synchronize said scanning mirror with said array switching drivers; and
- relay optics, said relay optics positioned in the optical path between the back side of said scan mirror that reflects the output radiation of said light emitting diodes and said continuous layer of photocathode material on the inside of said transparent input faceplate wherein the output radiation from said plurality of light emitting diodes is relayed by said relay optics onto said continuous layer of photocathode material for processing by said process control and tube electronic means.
- 4. A picture element array image intensifier camera tube and system for remote viewing of an image of an external scene, the tube and system comprising:
- an input imaging means for presenting said image of an external scene over the input side of a transparent input faceplate;
- a continuous layer of photocathode material on the inside of said transparent input faceplate;
- a first microchannel plate electron multiplier having a continuous input electrode in proximity focus with said continuous layer of photocathode material and having as an output electrode an array of electrically isolated parallel output electrode metallic stripes;
- a second microchannel plate electron multiplier having as an input electrode an array of electrically isolated parallel input electrode metallic stripes that are positioned adjacent said first microchannel plate electron multiplier array of electrically isolated parallel output electrode metallic stripes and having a continuous output electrode;
- an output means comprising a metal collector plate positioned on the internal side of a glass output faceplate adjacent said continuous output electrode of said second microchannel plate electron multiplier and an output circuit connected to said metal collector plate for presenting digitized collector plate current intensity from each picture element of said picture element array;
- a first microchannel plate output electrode array switching means;
- a second microchannel plate input electrode array switching means;
- tube electronic means having power supply bias voltages that are applied to image intensifier tube elements and clock pulse producing means for activating said first and second microchannel plate switching means for selectively switching said bias voltages in some scan mode over individual stripes of said first microchannel plate electron multiplier output electrode array stripes and said second microchannel plate electron multiplier input electrode array stripes and further having position scan data produced in synchronism with activation of said switching means; and
- a display monitor for combining and analyzing said digitized collector plate current intensity with said position scan data and presenting a video amplitude signal therefrom.
Government Interests
The invention described herein may be manufactured, used, and licensed by or for the Government for governmental purposes without the payment of any royalty thereon.
US Referenced Citations (3)