| 摘要 |
An improved system for reproducing transparent photographic and other film images and opaque images on a television screen is provided in which the television picture tube upon which the image is displayed is utilized as a flying spot scanner for the image. The scanning spot from the tube is focused upon the image by a suitable lens. Light-sensitive means is positioned to receive such scanning light from the television tube which passes through or is reflected from the image and is responsive to the intensity of such light, which varies with the optical density or reflectance of the image, to produce electrical signals related thereto. These signals are amplified and returned via a suitable feed back circuit to the television unit to modulate the intensity of the screen illumination at any instantaneous spot in accordance with the signal intensity representing the corresponding spot on the image, and thereby reproduce the image upon the screen. This invention is adaptable to transparent and opaque image reproduction, still and motion picture reproduction, black-and-white and color reproduction and positive to positive and negative to positive reproduction, and may be readily employed in a home television entertainment system. |
