Claims
- 1. An optical reproducing method using an optical recording medium having grooves and lands alternately provided in a radial direction, information recording areas being formed in both of said grooves and said lands, and at least one prepit region where a groove is not formed,wherein, in said prepit region, first information marks are disposed on a virtual extension of a first boundary between one groove and one adjacent land and second information marks are disposed on a virtual extension of a second boundary between said one groove and an other adjacent land, said first and second information marks being disposed so as not to exist at opposing positions on both of said first and second boundaries of said one groove; wherein said first information marks include synchronous information and address information; wherein said second information marks include synchronous information and address information; wherein a trailing edge of said first information marks is aligned in the radial direction; said method comprising the steps of: irradiating an optical spot on said optical recording medium; detecting a reflected beam from said optical recording medium; and reproducing information on said optical recording medium by using a signal obtained by the reflected beam.
Priority Claims (3)
Number |
Date |
Country |
Kind |
7-270872 |
Oct 1995 |
JP |
|
7-024949 |
Feb 1995 |
JP |
|
7-300961 |
Nov 1995 |
JP |
|
CROSS-REFERENCE TO RELATED APPLICATION
This is a continuation application of U.S. application Ser. No. 09/809,048, filed Mar. 16, 2001, now U.S. Pat. No. 6,392,985, which is with U.S. application Ser. No. 09/808,993, filed Mar. 16, 2001, now U.S. Pat. No. 6,370,106, which are continuations of U.S. application Ser. No. 09/514,284, filed Feb. 28, 2000, now U.S. Pat. No. 6,262,968, which is a continuation of U.S. application Ser. No. 09/181,677, filed Oct. 29, 1998, now U.S. Pat. No. 6,064,644, which is a continuation of U.S. application Ser. No. 08/958,867, filed Oct. 27, 1997, now U.S. Pat. No. 5,898,663, which is a continuation application of U.S. application Ser. No. 08/733,924, filed Oct. 18, 1996, now U.S. Pat. No. 5,982,738, which is a continuation-in-part application of U.S. application Ser. No. 08/600,730, filed Feb. 13, 1996, now U.S. Pat. No. 5,805,565, the subject matter of which are incorporated by reference herein.
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Continuations (5)
|
Number |
Date |
Country |
Parent |
09/809048 |
Mar 2001 |
US |
Child |
10/067923 |
|
US |
Parent |
09/514284 |
Feb 2000 |
US |
Child |
09/809048 |
|
US |
Parent |
09/181677 |
Oct 1998 |
US |
Child |
09/514284 |
|
US |
Parent |
08/958867 |
Oct 1997 |
US |
Child |
09/181677 |
|
US |
Parent |
08/733924 |
Oct 1996 |
US |
Child |
08/958867 |
|
US |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
08/600730 |
Feb 1996 |
US |
Child |
08/733924 |
|
US |