Patent ID: 6292448
Filing Date: 2001-09-18
Classification: G11B

Abstract:
An information recording apparatus, in which before information is recorded onto an information record medium by irradiating a light beam, a test signal is recorded for each of a plurality of unit test record regions forming a test record region on said information record medium, with a plurality of different record powers, and then said test signal recorded in each of the unit test record regions is reproduced, and further an optimal record power for said light beam is selected on the basis of a condition of said reproduced test signal, said information recording apparatus comprising:a re-writable memory device for storing power set values to obtain said plurality of different record powers respectively, in response to location information which identifies respective one of said unit test record regions;a recording device for recording said test signal in said test record region on the basis of a constant record clock signal;a location information generating device for generating said location information at a cycle corresponding to a record time for each of said unit test record regions;a record controlling device for reading out said power set value stored in said re-writable memory device in accordance with said generated location information and then outputting said read out power set value to said recording device;a defect detecting device for detecting a defect in respective one of said unit test record regions, in which a recording operation is performed by said recording device; anda power set value storing device for storing said power set value, which is read out in accordance with one location information by said record controlling device when said defect is detected, into said re-writable memory device such that said stored power set value corresponds to another location information different from said one location information.