22results about "Image-conversion/image-amplification tubes" patented technology

This invention relates to the field of imaging system technology, providing a time-stretched scanning framing single-line-of-view imaging method and system, comprising: a photocathode for converting incident light signals into electron beams and transmitting ramp-stretching pulses; an anode grid, which, together with the photocathode, forms an accelerating electric field; a long magnetic lens for focusing the time-stretched electron beam; a deflection scanning system consisting of two sets of orthogonally arranged deflection plate electrodes, each set including two parallel and opposing plate electrodes, for applying a two-dimensional deflection electric field to the time-stretched electron beam, thereby spatially separating electron beams incident at different times; a gated microchannel plate detector for gating, multiplying, and imaging the deflected and separated electron beam; and a high-voltage pulse generator for generating cathode ramp-stretching pulses and microchannel plate gated selection pulses. This invention can better achieve high spatiotemporal resolution single-shot multi-frame single-line-of-view imaging.

There is disclosed a gated power supply for a night vision system includes an input terminal to receive source power, and output terminal to electrically couple to a photocathode, a first voltage source to source a positive or neutral voltage to the photocathode, a second voltage source to source a large negative voltage to the photocathode, and a switching circuit to switch between the first voltage source and the second voltage source on a duty cycle, wherein the switching circuit comprises an optical switch.

A photocathode. The photocathode includes an absorber. The absorber a p-type bulk active layer and a plurality of nanostructures formed on the p-type bulk active layer. The Photocathode further includes the plurality of nanostructures, such that the plurality of nanostructures are formed at a band bending region between the bulk active layer and the vacuum.

A night vision optical device includes an underlying device configured to be sensitive to light in a first spectrum, and to provide output light based on absorbing light in the first spectrum. The night vision optical device further includes a stacked device overlapping the underlying device. The stacked device includes one or more openings formed in the stacked device to form one or more transparent regions which are transparent to the light in the first spectrum to allow light in the first spectrum to pass through to the underlying device. The stacked device is sensitive to light in a second spectrum. The stacked device outputs light in the first spectrum to the underlying device as a result of absorbing light in the second spectrum. Thus, the underlying device outputs light based both on light passing through the transparent regions and on light output by the stacked device.

This application relates to the technical field of low-light imaging and photoelectric detection, and discloses an image intensifier with a microchannel plate having dual-layer output electrodes. The intensifier includes a photocathode, a microchannel plate, and a fluorescent screen arranged sequentially along the directions of photon, photoelectron, and secondary electron propagation. The output end of the microchannel plate has a dual-layer output electrode structure, including a first output electrode layer, a high secondary electron multiplication layer, and a second output electrode layer stacked sequentially from the inside to the outside of the channel. This structure collimates and focuses the output electrons, thereby improving spatial resolution. The high secondary electron multiplication layer of the microchannel plate is an insulating material with a high secondary electron emission coefficient, which can compensate for the gain loss caused by the immersion of the first and second output electrode layers into the channel, improving the spatial resolution of the image intensifier while effectively maintaining its gain performance.

The application relates to the technical field of micro-light imaging, and discloses an image intensifier with a micro-channel plate, which comprises, from top to bottom, a photocathode, a micro-channel plate and a fluorescent screen. The micro-channel plate comprises a lead silicate glass substrate with hundreds of thousands of electron multiplication channels, an input electrode located at the incident end of the channels, an output electrode located at the outgoing end of the channels and a channel inner wall forming the inner surface of the channels. The surface layer of the input electrode and the channel inner wall is a material layer, and the surface layer of the output electrode is a NiCr material layer. The input electrode and the channel inner wall adopt a material layer with a high secondary electron emission coefficient to ensure high gain; the output electrode adopts a NiCr material layer with a low secondary electron emission coefficient to absorb large-angle electrons and collimate the output electron beam, thereby improving the spatial resolution, effectively solving the mutual restriction relationship between the spatial resolution and the gain in the existing micro-channel plate and realizing high-brightness and high-definition imaging.

The invention discloses a double-indium-sealed image tube which comprises a tube shell, a photoelectric cathode assembled with a first end of the tube shell and a fluorescent screen assembly assembled with a second end opposite to the tube shell. A first indium sealing layer for fixing the first end and the photoelectric cathode together is arranged between the first end of the tube shell and the photoelectric cathode, and a second indium sealing layer for fixing the second end and the fluorescent screen assembly together is arranged between the second end of the tube shell and the fluorescent screen assembly. According to the double-indium-sealed image tube, pollution to the tube shell and the surface of the fluorescent screen is effectively reduced. In addition, the invention also discloses a manufacturing method of the double-indium-sealed image tube.

The application belongs to the technical field of glass and specifically relates to a glass material with high corrosion resistance and stability, the cation composition of which is as follows in terms of mole percentage: 61-70% of Si 4+ , 3-12.5% of B 3+ , 1-5.5% of Al 3+ , 5-13% of K + , 5-13% of Na + , 0.2-3% of Ca 2+ , 0.1-2% of Li + , 0.1-1% of Mg 2+ , and 0.1-1% of Ti 4+ . The application is designed in a multi-component and multi-functional synergistic manner, so that the prepared glass meets the harsh requirements on thermal, optical, chemical and processing properties, is suitable for high-end optical devices such as micro-channel plates, and has a wide application prospect in the fields of photoelectric detection and imaging, mass spectrometers, high-energy physics, streak cameras, high-end medical imaging and the like.

The invention relates to a microchannel wafer (18) comprising a body (39) provided with a plurality of tubular microchannels (25) whose axes of revolution are parallel to each other; and a functionalization layer (33) present on an internal surface of each microchannel (25). According to the invention, the constituent material of the body (39) is pure silica. Figure for the abstract: Fig 5

The invention relates to the technical field of imaging systems, and provides a time broadening scanning framing single-sight-line imaging method and system, and the system comprises a photoelectric cathode which is used for converting an incident light signal into an electron beam and transmitting a slope broadening pulse; the anode grid mesh and the photoelectric cathode jointly form an accelerating electric field; the long magnetic lens is used for focusing the electron beam after time broadening; the deflection scanning system is composed of two groups of deflection plate electrodes which are orthogonally arranged, each group of deflection plate comprises two parallel and opposite plate electrodes, and the deflection plate electrodes are used for applying a two-dimensional deflection electric field to the electron beams subjected to time broadening, so that the electron beams incident at different time are separated in space; the gating micro-channel plate detector is used for performing gating, multiplication and imaging on the electron beams after deflection separation; and the high-voltage pulse generator is used for generating a cathode slope broadening pulse and a micro-channel plate gating pulse. According to the invention, single-time multi-frame single-sight imaging with high spatial-temporal resolution can be well realized.

This invention relates to a photodetector comprising a support layer (10), a grating structure (20), and an active layer (30). The grating structure (20), referred to as a photonic crystal structure, comprises a pattern (22.1) and a non-zero constant thickness e. ccs The structured layer (22) is formed by the continuous sublayer (22.2), and the pattern (22.1) widens along the direction toward the continuous sublayer (22.2). Furthermore, the size of the photonic crystal structure (20) is such that the structured layer (22) forms a photonic crystal that supports at least one guided mode that can be excited by the incident light of interest. The photonic crystal is optically coupled to the active layer (30), such that the guided mode is optically confined in the structured layer (22) and the active layer (30).

The invention discloses a low-light-level image intensifier filling and sealing structure and a filling and sealing method, and belongs to the technical field of image intensifiers. According to the encapsulation method, a pressure glue injection vacuum encapsulation technical scheme is generally adopted, and a base, an upper sealing ring, a sealing ring, a lower sealing ring and an image intensifier encapsulation shell in the encapsulation structure form a sealed cavity. In vacuum encapsulation equipment, the encapsulation glue is injected from a bottom glue injection head and enters the image intensifier from the bottom of an image intensifier encapsulation shell and a waist glue inlet hole respectively, air in the image intensifier is exhausted from bottom to top, the encapsulation glue finally overflows from a glue outlet hole of an image intensifier encapsulation cover, and complete filling of glue in the image intensifier is achieved. Compared with a traditional immersion vacuum potting method, on the premise that the same potting quality is guaranteed, the using amount of the potting adhesive is greatly reduced, the production cost is reduced, meanwhile, the designed potting structure is easy to assemble and disassemble, and the large-scale production efficiency is effectively improved.

A photocathode epitaxial structure. The photocathode epitaxial structure includes an improved substrate stack. The improved substrate stack includes a GaAs substrate and one or more additional layers formed on the GaAs substrate. The one or more additional layers are configured to provide an improved substrate stack surface with predetermined characteristics for forming a semiconductor device on the improved substrate stack surface. The photocathode epitaxial structure further includes an InGaAs p-type photocathode formed on the improved substrate stack surface. The InGaAs p-type photocathode has a predetermined percentage of In.

Extracting data in pulsed light, the method includes receiving input light at an image intensifier tube. At a power supply coupled to the image intensifier tube, current to the image intensifier tube is varied to implement automatic brightness control of the intensifier tube based on intensity of the input light received at the image intensifier tube. At a signal processor coupled to the power supply, changes in voltage or current supplied by the power supply occurring as a result of changes in the intensity of the input light to the image intensifier tube are detected. Based on the changes in voltage or current supplied by the power supply, data embedded in the input light to the image intensifier tube is extracted.

The present invention provides a microchannel plate, a preparation method and application thereof, where the microchannel plate is provided with a large number of channels penetrating in the thickness direction. On one side of an inlet end face of the microchannel plate, a flared end face of each channel is a hexagonal tapered bore; and in a cross-section perpendicular to an axial direction of each channel, the flared end face of the channel has an outer edge that is hexagonal and an inner edge that is circular. The present invention proposes a hexagonal special-shaped flared microchannel plate with an array of micropores having hexagonal tapered bores in the end face and cylindrical inside, where the circles in the form of a hexagonal packed periodic array is replaced with the hexagons in the form of a hexagonal close-packed periodic array, so that the close-packed coefficient of the channel array of the microchannel plate increases from 0.907 when the existing circular channels are arranged in a hexagonal manner to 1 when the hexagonal channels are arranged in a hexagonal manner, so that when the flared end face channel wall thickness of the channel of the microchannel plate is ≥100 nm, an open area ratio of the microchannel plate is ≥91%. The present invention significantly improves the open area ratio of the input surface of the microchannel plate, improves the detection efficiency of the microchannel plate for an input signal, while avoiding generation of a flared tip to cause a tip discharge, and thus is more suitable for practical use.

An image intensifier assembly has an image intensifier tube having a optical element. The optical element includes a emitting surface. The optical element comprises an outer dimension. The image intensifier assembly further includes a first power supply comprising a first circuit board having a first inner dimension defining an opening, a first outer dimension and a first thickness. The first inner dimension surrounds the outer dimension of the optical element. The first outer dimension is within the image intensifier assembly. The first circuit board further includes a component surface. The component surface extends from the first inner dimension to the first outer dimension. The first circuit board has power supply components mounted on the component surface.

The invention discloses a superlattice blue-green light enhanced photoelectric cathode which comprises a gallium arsenide cap layer, a superlattice absorption layer and a window layer which are arranged in a stacked mode, the thickness of the gallium arsenide cap layer is larger than or equal to 3 nanometers and smaller than or equal to 10 nanometers, and the outer surface of the gallium arsenide cap layer is a negative electron affinity surface; the superlattice absorption layer comprises a plurality of gallium-arsenic-phosphorus barrier layers and a plurality of indium-gallium-arsenic well layers, and the gallium-arsenic-phosphorus barrier layers and the indium-gallium-arsenic well layers are alternately stacked to form a plurality of periodic structures. The thickness of each periodic structure is greater than or equal to 5 nanometers and less than or equal to 15 nanometers to shift the peak value of the light absorption wavelength of the photocathode to a wavelength range greater than or equal to 500 nanometers and less than or equal to 600 nanometers. The superlattice absorption layer is arranged, so that electrons and holes are limited by quantum in the indium gallium arsenic well layer, energy level splitting is triggered, and absorption spectrum blue shift is further achieved.

The application provides a triangular wire and a preparation method and application thereof. The method comprises the following steps: processing a glass rod into a hexagonal rod with a radial section being a regular hexagon, and then drawing the hexagonal rod into a hexagonal wire; stacking and arranging the hexagonal wire in a mold with a radial section being a triangle, so that the side surfaces of each hexagonal wire abut to form a close packing, and a bundle rod is obtained, so that a triangular multifilament rod with a radial section being a triangle is obtained; and the triangular multifilament rod is drawn to obtain a triangular wire. The technical problem to be solved by the application is how to prepare a special-shaped wire with a triangular structure and apply the special-shaped wire to the preparation process of a micro-channel plate with a special-shaped hole structure combining a hexagonal taper hole and an inner cylinder, so that the obtained micro-channel plate has a high opening ratio, the micro-channel plate does not cause tip discharge when used in a high-field application scene, and the micro-channel plate does not cause abnormal increase of dark current, so that the micro-channel plate is more suitable for practical use.

A night vision system along with an image intensifier tube and method for forming the tube are provided. The night vision system incorporates the image intensifier tube in both an analog channel as well as a digital channel, with an addressable display within the analog image intensifier tube analog channel configured to create an electronically addressable output. An analog image intensifier tube is included in the digital imager for presenting binary digital signals representative of an image, or of symbol indicia, and registering those digital representation from the digital imager onto one or more electron multipliers of the analog image intensifier tube within the analog channel. The provided night vision system also utilizes a cathodoluminescent screen, which is a highly efficient light source that reduces system power.

The invention discloses a micro-electro-mechanical optical quantum digital low-light device and a packaging method thereof. The micro-electro-mechanical optical quantum digital low-light device comprises a cathode, a tube shell precursor and a tube shell rear body, the MCP is packaged in the tube shell precursor; a CMOS circuit is arranged in the tube shell rear body; an HTCC base is arranged at the plugging end of the tube shell rear body; when the device is used, voltage is respectively applied to the cathode, the MCP input, the MCP output and the electrode of the CMOS circuit, the voltage difference between any two adjacent electrodes is 50-3000V, the device is low in power consumption, high in image frame frequency and low in working illumination, the night vision requirement is met, and meanwhile, the image output meeting the frame frequency requirement can be realized.