And method for position verification apparatus, and method position measuring device, and a computer program for position measurement or position verification

摘要

Position verification device (300), a first recording means for recording information the first area the first recording layer (L0 layer) (10) (302, etc.), partial regions which are opposed to the first region (11a) the second region the second recording layer including the (L1 layer) in (11), the laser beam by the laser light transmitted through (i) the first area, and records portions information impermeable (ii) a first area by, the reproduction quality of some information reproducing means that a second recording means for recording the other unit information (302, etc.) for reproducing information (302, etc.), the regenerated indicated, other parts information reproduced indicated Based on the transition position of transition to the playback quality, and a (305) determining means for determining whether or not within an acceptable range relative displacement.