APPARATUS FOR READING FROM AN OPTICAL RECORDING MEDIUM

摘要

PURPOSE: An apparatus for reading data from an optical recording medium is provided to read the data from the optical recording medium having high data density. CONSTITUTION: An objective lens(7) focuses first beam and second beam on an optical recording media(8). The objective lens forms a first optical spot and a second optical spot. The second optical spot is bigger than the first optical spot. The second optical spot virtually includes the first optical spot. A detector(11) detects the first optical spot and the second beam reflected to from the optical recording media.