Optical disk apparatus, control method, control program and information storage medium

摘要

Disclosed herein is an optical disc apparatus including: an optical pickup radiating light having a first wavelength provided for an optical disc medium of a first type and light having a second wavelength which is smaller than the first wavelength and provided for another optical disc medium of a second type; a signal outputting section outputting a signal according to light reflected by the optical disc medium to reflect light radiated by the optical pickup; and a type determination section requesting the optical pickup to radiate light having the first wavelength to an object optical disc medium to acquire the signal output by the signal outputting section and determining the type of the object optical disc medium in accordance with the number of peaks appearing in the acquired output signal output by the signal outputting section while moving the optical pickup in a direction to the object optical disc medium.

主权项

1. An optical disc apparatus capable of reading out information stored in an optical disc medium of a first type and another optical disc medium of a second type, said optical disc apparatus comprising:
an optical pickup radiating light having a first wavelength provided for said optical disc medium of said first type and light having a second wavelength which is smaller than said first wavelength and provided for said optical disc medium of said second type; a signal outputting section outputting an output signal according to reflected light obtained as a result of reflection on said optical disc medium of light radiated by said optical pickup; and a type determination section requesting said optical pickup to radiate light having said first wavelength to an object optical disc medium serving as an object of type determination to acquire an output signal output by said signal outputting section and determining the type of said object optical disc medium based on the number of detected peaks appearing in said acquired output signal output by said signal outputting section while moving said optical pickup in a direction to said object optical disc medium; wherein while moving said optical pickup in a direction approaching said object optical disc medium, said type determination section requests said optical pickup to radiate light having said first wavelength to said object optical disc medium to acquire an output signal output by said signal outputting section and determines the type of optical disc medium based on comparing a peak initially appearing in said acquired output signal to a first predetermined threshold value and a second predetermined threshold value, the second predetermined threshold value being substantially greater than the first predetermined threshold value.