A 2000 scanning lines real-time digital radiography (DR) system using an high difinition image intensifier (II)/a high resolution TV-camera has been developed. We obtained the spatial resolution, which was the value of 2.9 Ip/mm (at 5% MTF value) on the inout screen of the 12-inches II was comparable to that of a film/screen.

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This paper describes an image enhancer which is small enough to be contained in the recently developed NHK 2/3 inch COD HDTV hand-held camera. At the beginning of the design process, we considered what structure would be most suitable to match the characteristics of the camera, which uses three 1.3M pixel CCD arrays in a Dual-green pickup method. We came to the conclusion that using an analog image enhancer with a glass delay line was the best choice for an HDTV hand-held camera, in view of its low power consumption. In addition, we employ a new CCD driving method in the camera to simplify the enhancer's circuits. By means of the built-in enhancer, the portability and picture quality of the hand-held camera has been much improved, increasing its usefulness in HD-ENG systems.

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We have developed a Hi-Vision High-Speed Camera System, which consists of a high field rate camera (180field/sec) and a solid-state memory recorder, which records and reproduces Hi-Vision images at high-speed scanning three times as fast as that of conventional camera systems. The compact camera head incorporates wide-band signal processing circuits and a miniaturized optical transmitter and receiver, and it can be connected to the optical fiber directly, which is extended from the camera head to the memory recorder. The recorder using DRAM acts of high speed and has a large storage capacity and, actually, can store up to 30 seconds (180field/sec) of images. This paper describes the configulation of this system and basic characteristics of the three times scan camera.

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A new HDTV camera HDL-70 using 2/3-inch FIT CCD sensers wuth 1,300,000plxels. has been developed. HDL-70 provides a substantial reduction in both size and weight over conventional HDTV cameras while maintaining a high image quality.

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HDTV Camera System "HDC-500" with 2 million pixels CCD has been realized by use of Hyper HAD (H__-ole A__-ccumulation D__-iode) CCD, IC development of CCD peripheral circuit, low power design, and signal process technology. As the camera head part is separable, there are two kinds of operation modes that is a production system use and a portable use in a stand alone mode to expand out door shooting possibilities. The HD-CCD camera's characteristics are as follows; Sensitivity:F8/20001×, S/N:54dB, D-range:600%, Smear reduction:-100dB, Power consumption:35W (including camera adaptor). H-resolution:1000 TV Lines. Camera head weight:6.5Kg (including camera adaptor).

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