摘要:
An improved microchannel plate (22) is shown fabricated from tubes formed from at least two types of cladding glass (56,58) and a core glass (54); including a first cladding (56) of partial acid resistant glass and a second, super cladding (58) of high acid resistant glass. The first cladding (56) may surround a hollow core that forms a passage or it may surround a core (54) of low acid resistant glass which is removed by an acid bath to form the passage (32). The second cladding (58) surrounds the first, while the opening of the passage surrounded by the first cladding (56) is tapered by an acid etch that does not affect the second cladding (58). Thus, the ratio of the open area of the passages to their end surface area is controlled only by the removal of the first cladding.
摘要:
An improved microchannel plate (22) is shown fabricated from tubes formed from at least two types of cladding glass (56,58) and a core glass (54); including a first cladding (56) of partial acid resistant glass and a second, super cladding (58) of high acid resistant glass. The first cladding (56) may surround a hollow core that forms a passage or it may surround a core (54) of low acid resistant glass which is removed by an acid bath to form the passage (32). The second cladding (58) surrounds the first, while the opening of the passage surrounded by the first cladding (56) is tapered by an acid etch that does not affect the second cladding (58). Thus, the ratio of the open area of the passages to their end surface area is controlled only by the removal of the first cladding.
摘要:
Die Erfindung betrifft ein Verfahren zur Herstellung geschichteter Vielkanalplatten mit Dynoden aus Metall für die Verstärkung optischer Bilder oder anderer flächenhafter Signalverteilungen mittels Sekundärelektronenvervielfachung sowie deren Verwendung so hergestellter Vielkanalplatten. Die Aufgabe der Erfindung wird dadurch gelöst, daß
a) zunächst eine Negativform der herzustellenden geschichteten Vielkanalplatten erzeugt wird, in dem in eine Platte durch partielles Bestrahlen und partielles Entfernen dieses Materials unter Ausnutzung der durch die Bestrahlung erzeugten unterschiedlichen Materialeigenschaften senkrecht oder schräg zur Plattenoberfläche die gitterförmigen Freiräume eingearbeitet werden, daß b) in die gitterförmigen Freiräume der Negativform unter Verwendung der mit ihr verbundenen Metallelektrode die Dynodenschichten galvanisch abwechselnd mit elektrisch leitenden oder isolierenden Zwischenschichten erzeugt werden, worauf c) die Negativform entfernt wird, und im Falle der Erzeugung elektrisch leitender Zwischenschichten diese entfernt oder in einen elektrischen Isolator umgewandelt werden.
摘要:
An image intensifying device includes a lens that is positioned at a light input that forms an image of a scene. The image intensifying device also includes an image intensifier tube that includes a photocathode that is positioned to receive the image formed by the lens. The photocathode generates photoelectrons in response to the light image of the scene. The image intensifier tube also includes a microchannel plate having an input surface comprising the photocathode. The microchannel plate receives the photoelectrons generated by the photocathode and generating secondary electrons. An electron detector receives the secondary electrons generated by the microchannel plate and generates an intensified image of the scene.
摘要:
A charge read-out structure for photon and particle detectors, which is capable of spatially-resolving a position of the charge. The structure comprises a resistive element defining a detection surface which is capacitively coupled to an array of electrically insulated electrodes. Each electrode in the array is capacitively coupled to an adjacent electrode in the array to form a capacitively coupled network of electrodes. Selected ones of the electrodes in the array are each coupled to an array output for connection to a respective charge measurement device. The resistive element has a resistivity sufficient to temporarily localize a charge induced on the resistive element to an area corresponding to a subset of said electrodes in the array and for a duration sufficient for signal measurement from the array of electrodes. Charge measurement devices are coupled to selected electrodes in the network such that the spatial position of a charge event in the network can be determined by comparing the outputs from each charge measurement device.
摘要:
This invention relates to a low light imaging sensors and particularly image intensification and CMOS sensors. To overcome issues of dazzle and halo when operating in areas where the scene encompasses bright light sources, the invention provides material layers in contact with the detector material to spatially limit the generation or subsequent diffusion of electrons in said detector material. This allows the imaging sensor to perform as normal under bright conditions, maintaining the operator's scene awareness and spatial acuity.
摘要:
An MCP unit of the present invention has a triode structure with a structure to achieve a desired time response characteristic independent of restrictions from a channel diameter of MCP, and is provided with an MCP group, a first electrode, a second electrode, an anode, and an acceleration electrode. Particularly, the MCP unit further comprises an electron lens structure for confining reflected electrons emitted from the anode in response to incidence of secondary electrons from the MCP group, within a space between the acceleration electrode and the anode.