Apparatus for optically reading a disc-shaped record carrier...

Details Apparatus for optically reading a disc-shaped record carrier... Apparatus for optically reading a disc-shaped record carrier...

Category

G - Physics

Subcategory

11

Subsubcategory

B

CPC

352/32.2

IPC codes

G11B 7/08 (2006.01) G11B 7/085 (2006.01) G11B 7/09 (2006.01)

Type

Patent

Patent number

CA 1161555

Description

PHN 9312 ABSTRACT: An optical read apparatus for a disc-shaped record carrier. The read apparatus comprises an optical read unit which includes a deflection element for control- ling 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 pro- gramme section on the record carrier to be located rapidly, the read unit can be moved in the radial direction. Dur- ing 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 dur- ing the rapid search for a desired programme section.

Application Number

341409

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