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The Experts below are selected from a list of 48 Experts worldwide ranked by ideXlab platform
Chun-lin Shen – 1st expert on this subject based on the ideXlab platform
Preliminary study of supersensitive Camera TubePhotoelectronic Detection and Imaging: Technology and Applications '93, 1993Co-Authors: Pan-ao Chen, Chun-lin ShenAbstract:
For lack of sensitivity, conventional HDTV Cameras can’t obtain satisfactory picture quality. A super-sensitive HDTV Camera Tube, HARPICON (10 times as sensitive as the Saticon), and a new Camera Tube (more sensitive than the HARPICON) are proposed. The later combines a microchannel plate (MCP) as the electron image storage, a field emission array cathode (FEAC), and high-performance electron-optics. The performances of two experimental Saticon are also given in this paper.© (1993) COPYRIGHT SPIE–The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
K. Tanioka – 2nd expert on this subject based on the ideXlab platform
Invention of highly sensitive HARP Camera Tube and its application4th IEEE International Conference on Vacuum Electronics 2003, 2003Co-Authors: K. TaniokaAbstract:
In 1985, I found that when an amorphous selenium (a-Se) photoconductive target for Camera Tubes is operated in a strong electric field of about 10/sup 8/ V/m, continuous and stable avalanche multiplication takes place, allowing high sensitivity to be obtained with little picture degradation. Based on this discovery, we went on to develop a new kind of Camera Tube called HARP (high-gain avalanche rushing amorphous photoconductor), which has been studied to this day to achieve further increases in sensitivity and a wider range of applications. HARP Camera Tubes, which have achieved sensitivities roughly 100 times greater than CCDs, can serve as a powerful tool for reporting breaking news at night and other low-light conditions, the production of scientific programs, and numerous other applications.
Super high sensitive Camera Tube for HDTV hand-held CamerasCameras and Systems for Electronic Photography and Scientific Imaging, 1995Co-Authors: Masakazu Nanba, T. Yamagishi, K. Tanioka, Saburo Okazaki, Yoshiro Takiguchi, Misao Kubota, Tsutomu Kato, Tadaaki Hirai, Yukio TakasakiAbstract:
We have developed a compact HDTV Camera Tube that combines high sensitivity with high resolution and is compact enough for hand-held Cameras. This new Camera Tube employs an 8-micrometers -thick HARP (High-gain Avalanche Rushing amorphous Photoconductor) target. Unlike other photoconductors, this target is unique in that its sensitivity can be increased to very high levels to cope with darker illumination. In addition, we have achieved high resolution over the entire picture through the use of a new all-electrostatic focusing and deflection system in the 18-mm-diameter Tube that facilitates the use of a narrow electron beam while assuring the optimal suppression of aberration. a prototype hand-held HDTV Camera equipped with three of these Camera Tubes has attained a maximum sensitivity of 2,000 lux at f/25 (normal gain) and a limiting resolution of more than 1,400 TV lines.© (1995) COPYRIGHT SPIE–The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
1-Inch high-performance HDTV HARP Camera Tube, 1993Co-Authors: T. Yamagishi, Masakazu Nanba, N. Egami, Saburo Okazaki, K. TaniokaAbstract:
In order to realize high-resolution, high-sensitivity HDTV Cameras, we developed an HDTV Camera Tube that combines a 4μm-thick HARP target with a 1-inch all-electrostatic focusing-deflecting system. The system features a unipotential lens that is shifted closer to the target
Gregory J. Murphy – 3rd expert on this subject based on the ideXlab platform
Application of a Plumbicon TV Camera Tube in a 2000-line imaging systemMedical Imaging 1994: Physics of Medical Imaging, 1994Co-Authors: Gregory J. Murphy, William Bitler, John Lybrook, Timothy L. Stevener, Marc W. BroemmelsiekAbstract:
In 1990 a new high resolution Plumbicon Camera Tube development was presented at SPIE Medical Imaging IV. At that time, image processors were not readily available to take advantage of the performance capabilities of this imaging device. This paper presents the result obtained with the latest imaging system capable of utilizing the performance advantages of high resolution Camera Tubes.
Importance of TV Camera Tube parameters in fluoroscopic imagingMedical Imaging VI: Instrumentation, 1992Co-Authors: William Bitler, James G. Coffin, Walter Doesschate, Robert M. Langdon, Gregory J. MurphyAbstract:
In the search for better ftuoroscopic imaging, the TV Camera Tube performance has become more critical. Traditional Camera Tube test methods, which expose Tubes to extreme conditions, have only marginal correlation to typical fluoroscopic usage. This paper compares these traditional measurements with test measurements made on a modern fluoroscopic digital system for two different types of TV Camera Tubes. The results obtained show how the x-ray system influences the importance of the TV Camera Tube parameters and which Tube features are most relevant.