| 摘要 |
An optical read apparatus for a disc-shaped record carrier. The read apparatus comprises an optical read unit which includes a deflection element for controlling the radial position of the scanning spot, for which purpose said deflection element is included in a closed servo control loop. In order to enable a desired program section on the record carrier to be located rapidly, the read unit can be moved in the radial direction. During this movement of the read unit the servo control loop is rendered inoperative each time after the deflection element has reached a preset maximum deflection, after which this deflection element is reset rapidly and the servo control loop is rendered operative again. Thus it is achieved that image reproduction is also maintained during the rapid search for a desired program section. |
