US 7,072,288 B2Granted

Optical reproducing method for optical medium with aligned prepit portion

AssigneesHitachi, Ltd., Hitachi Maxell, Ltd.

InventorsHarukazu Miyamoto, Hirofumi Sukeda, Motoyasu Terao, Hiroyuki Minemura, Tetsuo Andou

Life of this patent

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Abstract

A recording apparatus for recording information to an optical recording medium having an aligned prepit portion straddled on a plurality of tracks in a radial direction, the prepit portion including first and second prepit portions divided in a track direction, and a prepit of respective first and second prepit portions being arranged on a boundary of the respective tracks. The first prepit portion having an address information prepit and a synchronous information prepit, and the second prepit portion having a synchronous information prepit. The prepit of the first and second prepit portions being arranged at every two-track pitch in the radial direction. The apparatus including an irradiation source for irradiating a light spot on the optical recording medium, and a controller for controlling an irradiation position of an optical spot from the irradiation source.

Claims5

Dependent claims

An optical recording apparatus for recording information to an optical recording medium having an aligned prepit portion straddled on a plurality of tracks in a radial direction, the prepit portion including first and second prepit portions divided in a track direction, a prepit of respective first and second prepit portions being arranged on a boundary of the respective tracks, the first prepit portion having an address information prepit and a synchronous information prepit, and the second prepit portion having a synchronous information prepit, the prepit of the first prepit portion and the prepit of the second prepit portion being arranged at every two-track pitch in the radial direction, wherein the prepit of the first prepit portion and the prepit of the second pepit portion being arranged with one track displaced in the radial direction, and a gap being provided between the first and second prepit portion, the optical recording apparatus comprising:

an irradiation source for irradiating a light spot on the optical recording medium;
and
control means for controlling an irradiation position of an optical spot from the irradiation source.

Dependencies are inferred from the claim text.

Facts

Application: 11/178,445Filed 12 Jul 2005 · continuation
Priority: JP 7-02494914 Feb 1995
Published: US 2005/0249086 A110 Nov 2005
Granted: 4 Jul 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

G11B 7/24085
Tracks or pits; Shape, structure or physical properties thereof: pits
G11B 7/00718
Arrangement of the information on the record carrier, e.g. form of tracks , actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped;…:…
G11B 7/00745
Arrangement of the information on the record carrier, e.g. form of tracks , actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped;…:…
G11B 7/0938
With provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record…

Family

Application08/600,730Parent of this continuation-in-part · filed 13 Feb 1996
Application08/733,924Parent of this continuation · filed 18 Oct 1996
Application08/958,867Parent of this continuation · filed 27 Oct 1997
Application09/181,677Parent of this continuation · filed 29 Oct 1998
Application09/514,284Parent of this continuation · filed 28 Feb 2000
Application09/809,048Parent of this continuation · filed 16 Mar 2001
Application10/067,817Parent of this continuation · filed 8 Feb 2002
Application10/437,912Parent of this continuation · filed 15 May 2003
Application10/885,072Parent of this continuation · filed 7 Jul 2004
US 2005/0249086 A1Pre-grant publication · published 10 Nov 2005
US 6,996,054 B2Parent of this continuation
US 6,845,081 B2Parent of this continuation
US 6,580,685 B2Parent of this continuation
US 6,392,985 B2Parent of this continuation
US 6,262,968 B1Parent of this continuation
US 6,064,644 AParent of this continuation
US 5,898,663 AParent of this continuation
US 5,982,738 AParent of this continuation
US 5,805,565 AParent of this continuation-in-part
Application08/733,924Parent of this continuation-in-part
US 2001/0010666 A1Published application
US 2002/0089921 A1Published application
US 2003/0193862 A1Published application
US 2004/0240347 A1Published application
US 7,072,288 B2This patent

From the US filing history. Foreign family members aren’t listed.