光ディスク装置 - ソニー株式会社

Title:

光ディスク装置

Document Type and Number:

Japanese Patent JP4019280

Kind Code:

B2

Abstract:

An optical disk apparatus for writing signals on a recording medium by irradiating the recording medium with a laser beam modulated based on the signals includes a first converting unit (7) for converting a first reflected laser beam component from the recording medium into electrical signals; a second converting unit (8) for converting a second reflected laser beam component into electrical signals; a first sample-and-hold unit (73,74) for sampling and holding the electrical signals from the first converting unit; a second sample-and-hold unit (83,84) for sampling and holding the electrical signals from the second converting unit; and transmitting devices (flexible cables) for transmitting the held signals from the first and the second sample-and-hold units. The sampled signals are averaged, and the averaged signal is held in each of the first and the second sample-and-hold units during signal writing. An object is to transmit without distortion signals corresponding to laser beam components reflected from a disk through flexible cables from a photodetector IC (7) and a front monitor photodetector IC (8), so that signal processing can be carried out precisely and stably without increased power consumption, even at increased recording speed.

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Inventors:

Toru Nagara
Yoshio Fukutomi

Application Number:

JP2003371085A

Publication Date:

December 12, 2007

Filing Date:

October 30, 2003

Export Citation:

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