METHOD AND APPARATUS FOR IDENTIFYING OPTICAL INFORMATION STORAGE MEDIUM

摘要

A method and apparatus for identifying an optical information storage medium, the method of identifying the optical information storage medium loaded into an apparatus for reproducing/recording the optical information storage medium including: moving an object lens at a predetermined velocity in a first direction or a second direction while the optical information storage medium is loaded; generating a sum signal by adding magnitudes of beams reflected by the optical information storage medium and condensed by an optical detector; measuring a first time period during which the sum signal has a value greater than a first level; and detecting a thickness of data layers of the optical information storage medium based on the first time period, wherein the thickness of the data layers corresponds to the type of the optical information storage medium.