Results 251 to 260 of about 6,221,198 (343)
Some of the next articles are maybe not open access.
Multifunction image intensifier for image processing
Applied Optics, 1980A specially designed image intensifier tube for optical image processing has been developed. This tube can achieve the many types of processing important for pattern recognition such as deflection, zooming, gating, rotation, intensification, and logic operation in a single device. Experimental demonstrations are presented.
A, Seko, T, Niikura, H, Kobayashi
openaire +2 more sources
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
openaire +1 more source
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
openaire +1 more source
Hysterosalpingography with image-intensified fluoroscopy
American Journal of Obstetrics and Gynecology, 1969Abstract Image-intensified fluoroscopy provides an excellent method for hysterosalpingography that is rapid, convenient, flexible, and accurate. Many of the technical errors of other methods of hysterosalpingography can be eliminated. Although visualization of the uterine and tubal lumina is continuous and detailed, with judicious use there need be ...
L A, Aaro, J R, Stewart
openaire +2 more sources
Catheterization and Cardiovascular Interventions, 1999
The X-ray image intensifier converts an X-ray image into a bright visible light image. This enables image recording as well as viewing without dark adaptation. This tutorial describes the construction and function of the image intensifier tube and its associated optics.
openaire +2 more sources
The X-ray image intensifier converts an X-ray image into a bright visible light image. This enables image recording as well as viewing without dark adaptation. This tutorial describes the construction and function of the image intensifier tube and its associated optics.
openaire +2 more sources
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
openaire +1 more source
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
openaire +1 more source
Photoelectronic image intensifiers
Reports on Progress in Physics, 1961The limits set to the detectability of an image by the statistical fluctuations resulting from the quantum nature of light are analysed and the efficiency of the photoelectric effect as a detector of optical images is compared with that of the photographic effect. The possible methods of using the photoelectric effect for image detection are enumerated
openaire +1 more source
Photoelectric Image Intensifiers
1971The basic reason for the development of photoelectronic devices is the fact that the photoelectric effect has a much higher quantum efficiency than the photographic effect. Thus, the probability that a photon will liberate a photoelectron is, under favorable conditions, as high as 0.3, whereas the probability that a similar photon will activate a grain
openaire +1 more source
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
openaire +2 more sources
Review of Scientific Instruments, 1962
A spark chamber is designed for photographic recording of single electrons from the photocathode of a single-stage image intensifier. The chamber has two high-resistance Nesa layers as the electrodes; the first layer is deposited on the outside of the mesh-supported thin mica window, and the second on the inner surface of the chamber end-window.
openaire +1 more source
A spark chamber is designed for photographic recording of single electrons from the photocathode of a single-stage image intensifier. The chamber has two high-resistance Nesa layers as the electrodes; the first layer is deposited on the outside of the mesh-supported thin mica window, and the second on the inner surface of the chamber end-window.
openaire +1 more source
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.
openaire +2 more sources