Harness, Dickey & Pierce, P.L.C.
Recorder
In a recording apparatus, a pit gain selection circuit 33 converts an amplitude proportional to pit length data into gain data, and outputs the gain data to a pit cutting signal generation circuit 39 via a timing adjustment circuit 35. The generation circuit 39 selects gain data proportional to each pulse duration of a pit signal and converts it into an analog signal. A groove correction value selection circuit 41 converts the analog signal into a groove correction value on the basis of the pit length data, and outputs the groove correction value to a groove correction signal generation circuit 47 via a timing adjustment circuit 45. The generation circuit 47 calculates a magnitude of groove signal correction, converts it into an analog signal, and outputs it to a subtractor 51. The subtractor 51 subtracts the analog signal from this analog signal. Power equivalent to power to be superposed on a light beam used for forming grooves because of the side lobe of a light beam used for forming pits is canceled only during cutting for forming pits. There is thus provided a recording apparatus capable of manufacturing an optical disk from which signals properly representing pits and grooves can be reproduced even when the density of tracks is physically increased.
Seiko Epson Corporation
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G11B G11B G11B G11B
inventional inventional additional inventional
Hideaki
Yamada