We have been studying an ultrahigh-definition and wide-screen video system for the future television system with a greater sensation of reality than that of HDTV. As the first result of our study, a camera and display system with 4000 scanning lines has been developed. This paper describes the setup and characteristics of the camera system with four 8-million pixel CCDs
A new contour compensation circuit suited for 4 CCDs-LCDs video system is described. It suppresses the false color caused by the non-linearity and the pixel-count difference between green and red or blue. The technique has contributed to the reduction of the signal process circuitry of an ultrahigh-definition camera.
High-frame rate digital-output CMOS image sensors having on-chip column parallel analog-to-digital converters are presented. Architecture of the A/D converter, readout signal chain and a pixel structure are described.
This time we developed the new camera recorder AJ-HDC27F(Varicam) that is the key product for the Digital Cinema. The Varicam has World First VFR(Variable Frame Rate) recording technology that can change the frame rate from 4fps(frame per second) to 60fps and new gamma curve which realizes the wide range latitude like film camera characteristic. We also developed the VFR shutter control function and Prime lens adapter function that is able to make the same tone picture quality like film camera.
We have developed an experimental progressive-scanning HDTV color camera system that has three 2/3-inch-2.2M-pixels-CCDs. This CCD has a Frame-Interline-Transfer (FIT) structure and was for interlaced-scanning, but we successfully drive it in a progressive mode by means of "M-FIT" and "FIT-IT" driving method, where "M-FIT" transfers pixel charges separately in two groups of odd lines and even lines, and "FIT-IT" stores the even lines in its vertical-transfer-CCD after transferring the odd lines into its frame memory. We drive it in 148.5 MHz to reproduce sixty frames a second of a progressive-scanned picture. The limiting resolution was 1,000 TV lines in both the horizontal and vertical directions.
An ultra-high-sensitivity HDTV color camcorder has been developed by using third generation image intensifier (I.I.) tubes which have GaAsP photocathode. In order to build a video cassette recorder (VCR) within a camera, and realize lighter weight and higher performance, a newly small optical unit consists of enlarger lens and tapered fiber optics plate (FOP) has been developed. The camcorder obtains full level signal under the low light condition of 0.37 lx at F 1.8, and has high signal to noise ratio of 56dB. This sensitivity is 200 times higher than that of normal HDTV CCD camcorders. It is absolutely suitable for night locations and observations of heavenly bodies.
We developed an ultrahigh-sensitivity HDTV camera for a remotely operated deep-sea vehicle using New-Super-HARP image pickup tubes and a special optical system. This was mounted on the 3000-m-class remotely operated "HYPER-DOLPHIN" and it captured extremely clear images that were displayed in the control room (control van) of the mother ship. The display used in this system was a 42-inch high-definition plasma screen. The camera was used to record the deep-sea marine environment and its inhabitants at depths up to 3000 meters, which has never been done with conventional systems.
A micro-CT (computed tomography) system with spatial resolution down to 6 urn was developed at SPring-8 using an X-ray indirect-conversion type detector incorporating a fluorescent screen and a lOM-pixel CCD camera for 3-D biomedical imaging. The detector's X-ray field of view was 24 mm wide by 16 mm high. X-rays are converted into a visible image in a phosphor layer of the screen, and a visible light image is detected by the CCD camera. Following the barium sulphate angiography, a rabbit auricle specimen implanted with VX2 carcinoma was fixed in formalin. 2D images were recorded for different angular positions of the specimen. A 3D image of the specimen was obtained by tomographic reconstruction, and 3D microangiographic features of small tumor blood vessels were demonstrated.