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Objectives for Image Converters and Image Intensifiers
Applied Optics, 1968The design of objectives for image tubes is discussed with consideration given to the limited resolution of the tubes, the desired resolution in the object plane, and the desired field of view. Particular attention is given to the case of maximum quantum yield for given resolution and field of view.
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The Detectivity of Intensifier Image Tubes
Applied Optics, 1966A theoretical development has been applied to intensifier image tubes which is similar to that used for ir photodetectors. In essence, a differential equation applicable to intensifier image tubes has been used to obtain exact solutions for signal and noise. These expressions account for factors such as phosphor time constant, area, frequency response,
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An image intensifier for the electron microscope
Journal of Physics E: Scientific Instruments, 1968An image intensifier system using a four-stage image intensifier optically coupled to a phosphor screen in the electron microscope is described. The system is shown to be limited by the quantum noise inherent in the electron image. The system can detect images down to 10 fA cm−2 which is at least an order of magnitude better than can be achieved by a ...
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SPIE Proceedings, 2009
Nitride based photocathodes for image intensifiers are of interest because of the wide span of wavelengths covered by the bandgap of the AlGaInN alloy system. The potential bandgap range for this alloy system is from 6.2 eV for AlN to 0.7 eV for InN.
J. W. Glesener +2 more
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Nitride based photocathodes for image intensifiers are of interest because of the wide span of wavelengths covered by the bandgap of the AlGaInN alloy system. The potential bandgap range for this alloy system is from 6.2 eV for AlN to 0.7 eV for InN.
J. W. Glesener +2 more
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Re image intensifiers and fluoroscopy stabilizers
The British Journal of Radiology, 1972Dr. J. L. Cole is not alone in his findings with regard to this particular combination of technical devices, which although it is of great convenience for working radiologists, brings with it a new concept, a new hazard, and a new responsibility (Cole, 1972). The concept of a constant and adequate input dose rate to the image intensifier is a perfectly
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Image quality of an image-intensifier fluorographic system
Physics in Medicine and Biology, 1984For an image-intensifier fluorographic system, all essential image-quality parameters (such as MTF, noise Wiener spectrum, sensitivity, and characteristic curve) were determined. The results are in good agreement with theoretical considerations and allow a specification of the influence of the system's components on image quality. Film noise especially,
M, Wolf, W, Steinbach, W, Angerstein
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Evaluation Of Image Intensifiers
Optical Engineering, 1982The performance of image intensifiers is rated according to their capability of detecting, recognizing, and identifying objects at low light levels. The most important characteristics limiting these capabilities are noise and imaging parameters. Noise parameters are normally expressed in signal-to-noise ratios, whereas imaging parameters are described ...
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1971
The history of intensifies cannot be divorced from the history of the signal-generating or camera tube itself. Interest in this area began shortly after the formalization of electron optics in the 1920’s. Much of this early work had as its ultimate objective the application of electron imaging to the problem of increasing the sensitivity of television ...
A. D. Schnitzler, George A. Morton
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The history of intensifies cannot be divorced from the history of the signal-generating or camera tube itself. Interest in this area began shortly after the formalization of electron optics in the 1920’s. Much of this early work had as its ultimate objective the application of electron imaging to the problem of increasing the sensitivity of television ...
A. D. Schnitzler, George A. Morton
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Image Intensifiers and the Scotoscope
Applied Optics, 1964There exist at present several types of electronic image intensifiers, including the multistage intensifier image tube and the intensifier orthicon, which are useful for night vision. Furthermore, advances are being made in this class of device. High sensitivity in a low light level telescope or scotoscope requires that it employ a large diameter ...
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1966
Publisher Summary This chapter describes various methods and techniques that developed to achieve that degree of excellence, as regards gain, resolution, and background and image quality that is necessary if the tube is to be useful in many important applications.
J.D. McGee +4 more
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Publisher Summary This chapter describes various methods and techniques that developed to achieve that degree of excellence, as regards gain, resolution, and background and image quality that is necessary if the tube is to be useful in many important applications.
J.D. McGee +4 more
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