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Optical information recording/reconstruction device and method recording/reconstruction information

A technology for optical information and reproducing devices, applied in optical recording/reproducing/erasing methods, recording/reproducing with optical methods, digital recording/reproducing, etc., capable of solving problems such as reduction in the reproduction amplitude of summation signals

Inactive Publication Date: 2004-03-03
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, if the light spot 210 deviates from the target track, away from the address pit 206, this can result in a corresponding reduction in the reproduction amplitude of the summed signal obtained from the header area 203.

Method used

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  • Optical information recording/reconstruction device and method recording/reconstruction information
  • Optical information recording/reconstruction device and method recording/reconstruction information
  • Optical information recording/reconstruction device and method recording/reconstruction information

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0071] An optical information recording / reproducing apparatus according to Example 1 of the present invention will be described below. figure 1 is a block diagram illustrating the optical information recording / reproducing apparatus 100 of the present invention.

[0072] like figure 1 As shown, the optical information recording apparatus 100 includes an optical disc drive 170 for driving the optical disc 1, and a host computer 180. The optical disc 1 comprises an information track 2 (ie a groove track or a land track).

[0073] The optical disk drive 170 includes an optical head 110, a tracking control / drive section 120, a reproduction signal processing section 130, a recording signal processing section 140, a spindle motor 150 for rotating the optical disk 1 and a system controller 160.

[0074] The optical head 110 includes a semiconductor laser, a collimating lens 4 that collimates the laser light emitted by the semiconductor laser, a half-way mirror 5 positioned on the ...

example 2

[0139] Figure 9 is a block diagram illustrating the reproduced signal processing section 132 of the optical information recording / reproducing apparatus according to Example 2 of the present invention. exist Figure 9 In , the structural elements appearing in the optical information recording / reproducing apparatus 100 of Example 1 are also denoted by the same reference numerals; description thereof is omitted here.

[0140] See Figure 9 , the reproduced signal processing section 132 includes: a summation amplifier 15 for outputting a summation signal of the detected signals output from the light receiving parts 7a and 7b of the photodetector 7, a differential amplifier 10 for outputting the summation signal from the light receiving parts 7a and 7b A differential signal of the detected signal output by the light receiving parts 7a and 7b of the detector 7; a first waveform balancing circuit 81 for receiving the differential signal from the differential amplifier 10 and conve...

example 3

[0156] Example 10 is a block diagram showing a reproduced signal processing section 133 adjacent to the optical information recording / reproducing apparatus according to Example 3 of the present invention. exist Figure 10 , also appears in Example 1 (see figure 1 ) in the optical information recording / reproducing apparatus 100 are given the same reference numerals in this example, and their descriptions are omitted.

[0157] like Figure 10 As shown, the reproduced signal processing section 133 includes: a summing amplifier 15 for outputting a summation signal of detection signals output by the light receiving parts 7a and 7b of the photodetector 7; a differential amplifier 10 for outputting A differential signal of the detection signal output by the light receiving portions 7a and 7b of the photodetector 7; a header portion detection area 30 including a waveform detection circuit 22 which receives the differential signal from the differential amplifier 10, and detects its ...

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Abstract

There is provided an optical information recording / reproducing device for recording, reproducing, or erasing information on an optical information recording medium including information tracks formed on a disk substrate including alternating groove tracks and land tracks each including: a header region for recording identification data representing location information in pre-pits; and a data region for recording user data, the pre-pits being grouped into blocks, the blocks wobbling alternately toward an inner periphery or an outer periphery of the disk substrate along a radius direction from a center line of each information track by a distance which is substantially 1 / 2 of the information track pitch. The pre-pits are provided along the radius direction at a pitch twice as large as the track pitch. The device includes: an optical system for radiating a light beam as a converged beam spot on an information track; an optical detector including two light receiving portions divided in parallel to the track direction for receiving the light beam reflected from the recording medium; a signal generator for generating a differential signal and an addition signal of output signals respectively output from the light receiving portions; a header region detection circuit for determining whether the converged beam spot is tracing the header region or the data region using the differential signal; and at least one reading circuit for reading the identification data from the differential signal and for reading information recorded in the data region from the addition signal.

Description

[0001] This application is a divisional application of a Chinese patent application with a filing date of April 11, 1997, an application number of 97113077.9, and an invention title of "Optical Information Recording / Reproducing Device and Method for Recording / Reproducing Information". technical field [0002] The present invention relates to an apparatus for recording, reproducing or erasing information on a disc-shaped optical information recording medium (hereinafter referred to as "optical information recording / reproducing apparatus") and a method therefor. In particular, the present invention relates to an apparatus for recording, reproducing or erasing information on an optical disc using a groove area (defined as "groove track") or a land area (defined as "land track") between grooves as an information track and method, such groove areas and land areas have been previously formed on the substrate of the magnetic disk. Background technique [0003] In recent years, a gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/007G11B7/013G11B20/10G11B20/12G11B27/19G11B27/30
CPCG11B7/00718G11B27/3027G11B7/013G11B20/1252G11B7/00745G11B20/10009G11B2220/20G11B27/19G11B7/09
Inventor 宫川直康东海林卫石田隆古宫成久门裕二
Owner PANASONIC CORP