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Application filed by Quanta Storage IncfiledCriticalQuanta Storage Inc
Priority to TW94107264ApriorityCriticalpatent/TWI310546B/en
Publication of TW200632882ApublicationCriticalpatent/TW200632882A/en
Application grantedgrantedCritical
Publication of TWI310546BpublicationCriticalpatent/TWI310546B/en
Moving Of The Head For Recording And Reproducing By Optical Means
(AREA)
Length Measuring Devices With Unspecified Measuring Means
(AREA)
Abstract
A method and apparatus to measure a track pitch of a compact disk utilizes a processor to read a pulse number recorded in a read only memory to drive a driving means, and then measure track numbers read by a reading means. Before measuring the track pitch, the pulse number products an angle driven by an unit pulse and then products a displacement pushed by a unit angle to obtain total displacement of the reading means driven by the driving means. Finally, the total displacement divides the track number to obtain the track pitch of the compact disk.
TW94107264A2005-03-092005-03-09A method and apparatus to measure a track pitch of a compact disk
TWI310546B
(en)
Information providing method, information providing apparatus, program for information providing method, and recording medium storing program for information providing method