| http://www.w3.org/ns/prov#value | - As described above, by detecting the respective signal while positioning the light detecting position on the photo-detector 18 depending on the type of disk being used, and by considering the positional difference between the laser diode for CD-R D1 and DVD D2, a single optical pickup can record and/or reproduce the data on or from the various types of the disks, such as CD-R D1 and DVD D2.
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