Registers – Coded record sensors – Particular sensor structure
Patent
1997-01-16
1999-09-28
Hajec, Donald
Registers
Coded record sensors
Particular sensor structure
235435, 235494, 369 58, 369 4429, G06K 700, G06K 710
Patent
active
059592800
ABSTRACT:
An optical disk reading apparatus and method to provide an optical disk reading system which is able to reproduce encoded optical data from varied optical disk formats fabricated in accordance with different standards. After loading an optical disk, a sensing device detects the total number of data layers, diameter or thickness, to identify the standard of the optical disk. The standard or type of an optical disk can be identified by detecting an identification mark, if the optical disk has one. A central processing unit (CPU) distinguishes the standard by referring the detected signal to stored data about the standard of various optical disk formats. In order to reproduce encoded data on the loaded optical disk, the CPU modulates the servo control circuit to set up the movement of the servo mechanisms according to the identified standard of the optical disk. Also the CPU operates the data processor to select an appropriate data encoding circuit in the data processor, according to the standard of the optical disk. After the initial set-up of the servo mechanisms and the data processor is determined, the data reproduction is started.
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Cyr Daniel St.
Hajec Donald
Laser Dynamics Inc.
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