| 摘要 |
PURPOSE:To prevent a shift of registration due to the changeover of lenses, by controlling the deflecting action of a television camera. CONSTITUTION:The deflection of an image pickup tube 20 in a television camera 7 is controlled by a horizontal deflection coil 21 and a vertical deflection coil 22. Horizontal amplitude regulators 23, 25 and horizontal centering regulators 24, 26 are provided for lenses A, B, and in accordance with the changeover of the lenses, the regulators are changed over to those for the selected lens using switches 27, 28. Each of the regulators is regulated beforehand every lens. Outputs from one of the regulators 23, 25 and one of the regulators 24, 26 are amplified by an amplifier 29 and inputted in the coil 21. Deflection in the vertical direction is controlled in the same manner as deflection in the horizontal direction. The control is applied to television cameras Y, M, C, BL. Ununiformity in the focal lengths of lenses and the gradients of the optical axes can be corrected. |
