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Shin Akabane

City: Tokorozawa
State/Country: JP

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Companies
Pioneer Corporation - Tokyo JP

Pioneer Corporation - Tokyo-to JP


Patents
An information recording/reproducing apparatus irradiates a light beam on an optical disc on which pre-pits are formed, and performs recording and/or reproduction of information with respect to the optical disc according to a recording clock produced based on a wobble signal and a pre-pit signal. When recording information onto the optical disc having the pre-pits, a light beam is radiated to thereby extract the wobble signal and pre-pit signal. Then, according to the wobble signal and the pre-pit signal, a recording clock signal is produced, and information is recorded based on the recording clock signal. When producing a pre-pit signal, a push-pull signal is produced from the reflected light from the optical disc, and this signal is compared with a reference level to thereby detect a pre-pit. Here, when a pre-pit is not detected, the reference level is changed and the detection processing of the pre-pits is executed again.
An optical recording apparatus includes a light source driving unit for driving the light source to emit the light beam; an emission light power detecting unit for detecting an emission light power from the light source; and a light power adjusting unit for controlling the light source driving unit based on a detected light power by the emission light power detecting unit to adjust the emission light power from the light source.
An optical recording apparatus includes a light source driving unit for driving the light source to emit the light beam; an emission light power detecting unit for detecting an emission light power from the light source; and a light power adjusting unit for controlling the light source driving unit based on a detected light power by the emission light power detecting unit to adjust the emission light power from the light source.

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