| http://www.w3.org/ns/prov#value | - The optical recording medium shown in FIG. 8 can be reproduced with the apparatus shown in FIG. 3 in a similar manner to that described in connection with embodiment 1, bringing about advantages that tracking offset can be reduced to ???0.03 ??m or less even when various kinds of external disturbance such as optical aberration are taken into account and in particular, it can be reduced to ???0.015
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