Claims
- 1. A method of forming a barcode on an optical disk, said method comprising the steps of:a) providing said optical disk having a control data area and an identifier for indicating the presence or absence of said barcode in said control data area, b) focusing a beam pattern on a reflective film of said optical disk in an information signal region on which data is recorded, and c) providing information for making said barcode, said information being PE-modulated so that a width of a mark of said barcode is half or less than a period of said barcode marks, d) rotating said optical disk while performing step b) and c) to form said barcode.
- 2. A method of forming a barcode on an optical disk according to claim 1,while performing step b) to form said barcode, wherein pulsed laser light from a light source is made into a rectangular beam pattern by using a rectangular mask and said rectangular beam pattern is modulated the intensity by a signal for making said barcode and focused on a reflective film in an information signal region in a prescribed radius portion of optical disk.
- 3. A method of forming a barcode on an optical disk according to claim 1,wherein said optical disk is constructed from two disk-substrates laminated together.
- 4. A method of forming a barcode on an optical disk according to claim 1,wherein said barcode is made by removing the reflective film of said optical disk in the same radius portion on said reflective film.
Priority Claims (2)
Number |
Date |
Country |
Kind |
7-261247 |
Oct 1995 |
JP |
|
8-008910 |
Jan 1996 |
JP |
|
Parent Case Info
This application is a continuation of U.S. patent application Ser. No. 09/441,281, filed Nov. 16, 1999, now U.S. Pat. No. 6,285,763 which is a Continuation of U.S. patent application Ser. No. 08/649,411, filed May 16, 1996, now U.S. Pat. No. 6,052,465.
US Referenced Citations (28)
Foreign Referenced Citations (32)
Number |
Date |
Country |
43 08 680 |
Oct 1993 |
DE |
4308680 |
Oct 1993 |
DE |
545472 |
Jun 1993 |
EP |
0 549 488 |
Jun 1993 |
EP |
0 553 545 |
Aug 1993 |
EP |
553545 |
Aug 1993 |
EP |
0 741 382 |
Nov 1996 |
EP |
56-25242 |
Mar 1981 |
JP |
58-211343 |
Dec 1983 |
JP |
60-193143 |
Oct 1985 |
JP |
61-71487 |
Apr 1986 |
JP |
61-190734 |
Aug 1986 |
JP |
63-46541 |
Feb 1988 |
JP |
63-164043 |
Jul 1988 |
JP |
63-298717 |
Dec 1988 |
JP |
1-268232 |
Oct 1989 |
JP |
2-7243 |
Jan 1990 |
JP |
2-44448 |
Feb 1990 |
JP |
2-56750 |
Feb 1990 |
JP |
2-232831 |
Sep 1990 |
JP |
4-162224 |
Jun 1992 |
JP |
04178967 |
Jun 1992 |
JP |
5-62363 |
Mar 1993 |
JP |
5-266576 |
Oct 1993 |
JP |
5-325193 |
Dec 1993 |
JP |
6-203412 |
Jul 1994 |
JP |
7-85574 |
Mar 1995 |
JP |
7-121907 |
May 1995 |
JP |
WO 9528704 |
Oct 1995 |
JP |
7-325712 |
Dec 1995 |
JP |
8-102133 |
Apr 1996 |
JP |
9101358 |
Mar 1993 |
NL |
Non-Patent Literature Citations (8)
Entry |
European Search Report corresponding to application No. 96915172.9 dated Oct. 22, 1997. |
Japanese Search Report dated Sep. 3, 1996. |
Japanese Search Report dated Jan. 30, 1996, application No. 95-02339. |
European Search Report dated May 15, 1997, application No. 95-938017. |
Japanese Search Report, application No. 11-257249, dated Feb. 29, 2000. |
Japanese Search Report, application No. 11-257250, dated Feb. 29, 2000. |
Japanese Search Report, application No. 11-257251, dated Feb. 29, 2000. |
Japanese Office Action, issued in corresponding Japanese Patent Application No. 11-257247, dated Sep. 25, 2001. |
Continuations (2)
|
Number |
Date |
Country |
Parent |
09/441281 |
Nov 1999 |
US |
Child |
09/713148 |
|
US |
Parent |
08/649411 |
May 1996 |
US |
Child |
09/441281 |
|
US |