Claims
- 1. An information recording apparatus for recording information to an optical recording medium, including a disk-like substrate, a spiral or concentric-shaped groove structure along tracks formed on the disk-like substrate, each of the tracks being divided into a plurality of recording units, each of the recording units including a dropout portion in a circumferential direction of the groove structure, the dropout portion being a non-groove portion, the groove structure being formed with a wobble in a fixed cycle in a radial direction, the fixed cycle of the wobble continuing in the circumferential direction along the track, and each length of the recording units being an integer multiple of the cycle of the wobble, the information 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.
- 2. An information recording apparatus according to claim 1, wherein the optical recording medium is divided into a plurality of groups in the radial direction, an arc length of each of the groups being equivalent.
- 3. An information recording apparatus according to claim 1, wherein the recording unit is radially divided as arc-like portions delimited by the same central angle in the radial direction.
- 4. An information recording apparatus according to claim 1, wherein the dropout portion has identification information indicative of the recording unit.
Priority Claims (2)
Number |
Date |
Country |
Kind |
8-197297 |
Jul 1996 |
JP |
|
9-023480 |
Feb 1997 |
JP |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
This is a continuation of U.S. application Ser. No. 09/761,571, filed Jan. 18, 2001, now U.S. Pat. No. 6,388,987, which is related to and with U.S. application Ser. No. 09/761,570, filed Jan. 18, 2001, now U.S. Pat. No. 6,388,986, which are continuations of U.S. application Ser. No. 09/350,107, filed Jul. 9, 1999, now U.S. Pat. No. 6,219,331, which is a continuation application of U.S. application Ser. No. 09/090,310, filed Jun. 4, 1998, now U.S. Pat. No. 5,930,228, which is a continuation application of U.S. application Ser. No. 08/900,294, filed on Jul. 25, 1997, now U.S. Pat. No. 5,936,933, which application relates to U.S. application Ser. No. 08/863,126, filed on May 27, 1997, now U.S. Pat. No. 5,953,299, entitled “INFORMATION RECORDING METHOD AND APPARATUS” by H. Miyamoto et al, and assigned to the present assignee, based on Japanese Patent Application Nos. 08-136189 filed on May 30, 1996 and 09-079587 filed on Mar. 31, 1997, the subject matter of which is incorporated herein by reference.
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Continuations (4)
|
Number |
Date |
Country |
Parent |
09/761571 |
Jan 2001 |
US |
Child |
10/075589 |
|
US |
Parent |
09/350107 |
Jul 1999 |
US |
Child |
09/761571 |
|
US |
Parent |
09/090310 |
Jun 1998 |
US |
Child |
09/350107 |
|
US |
Parent |
08/900294 |
Jul 1997 |
US |
Child |
09/090310 |
|
US |