| 摘要 |
1,181,348. Colour television cameras. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 14 June, 1968 [19 June, 1967], No. 28461/68. Heading H4F. A colour television camera includes first and second camera tubes 3, 4 on which are produced potential images of substantially equal overall area corresponding to a scene. The optical image formed on the luminance tube 3 is of continuous form, while optical image-splitting means 5 are provided in front of the chrominance tube 4 to divide the optical image formed thereon into a regular pattern of discrete image portions. As shown in Fig. 2, the image-splitting means 5 may comprise a glass or synthetic resin plate having a flat input surface and an array of optical fibres 6 on the output surface. Each fibre may be of truncated conical or pyramidal form, or may have a more complex shape in order to increase the light output. An alternative form of image-splitting means 5 comprises a flat transparent plate having spaced parallel grooves across the output face thereof so as to produce a series of discrete stripe-like image portions on the chrominance tube 4. Using a single chrominance tube 4 as shown, the camera may operate in the two-colour television system, or in any of the standard three-colour systems. Three separate chrominance tubes may alternatively be provided, in which case a single imagesplitting means 5 may be situated on the lightinput side of a colour separator, or a separate image-splitting means may be provided between the colour separator and each chrominance tube respectively. |
