	US 7,355,949 B2
	Apparatus and method for manufacturing optical disks, apparatus and method for recording data on optical disks, apparatus and method for reproducing data from optical disks, and optical disk formed with pit strings and mark strings with radial deviation features
Seiji Kobayashi, Kanagawa (Japan); and Toshihiro Fujiki, Tokyo (Japan)
Assigned to Sony Corporation, Tokyo (Japan)
Filed on Dec. 01, 2005, as Appl. No. 11/290,550.
Application 10/424733 is a division of application No. 09/412864, filed on Oct. 05, 1999, granted, now 6,665,240.
Application 11/290550 is a continuation of application No. 10/424733, filed on Apr. 29, 2003, granted, now 6,996,042.
Claims priority of application No. P10-285516 (JP), filed on Oct. 07, 1998; application No. P10-332222 (JP), filed on Nov. 24, 1998; and application No. P10-371795 (JP), filed on Dec. 28, 1998.
Prior Publication US 2006/0092823 A1, May 04, 2006
Int. Cl. G11B 5/09 (2006.01)

U.S. Cl. 369—59.24 [369/59.25; 369/275.3]

15 Claims

5. An optical disc manufacturing apparatus configured to manufacture an optical disc, comprising;

an optical substrate manufacturing unit configured to manufacture an optical disc substrate;

a main signal generating unit configured to generate a main signal from main data;

a sub signal generating unit configured to generate a sub signal from sub data; and

a data recording mechanism configured to form pit strings or mark strings on the optical disc, and to positionally deviate an irradiation area of the pit strings or mark strings in a radial direction from a track center of a track on the optical disc according to said sub signal so as to form respective pit strings or mark strings at only one of a first radial offset in the radial direction or a second radial offset in an opposite radial direction, and

wherein a range of the radial deviation of said irradiation area according to said sub signal is limited so as to remain within a detection range of an optical pickup device.