Claims
- 1. A light absorbent comprising a monomethine cyanine dye of Formula 1:
- 2. The light absorbent according to claim 1 wherein the anion is an organic metal complex anion capable of improving light resistance.
- 3. The light absorbent according to claim 1 or claim 2 which has an absorption maximum at a wavelength of 450 nm or less.
- 4. The light absorbent according to claim 1, 2, or 3 which substantially absorbs visible light with a wavelength of 450 nm or less when in a thin layer form.
- 5. The light absorbent according to claim 1 which further includes at least one other organic dye compound sensitive to visible light.
- 6. The light absorbent according to claim 1 or 5 which further includes at least one appropriate light-resistant improver.
- 7. The light absorbent according to claim 1, 5, or 6 which is sensitive to visible light with a wavelength of 450 nm or less when in a thin layer form.
- 8. An optical recording medium comprising a monomethine cyanine dye of Formula 1:
- 9. The optical recording medium according to claim 8 further including at least one other organic dye compound sensitive to visible light.
- 10. The optical recording medium according to claim 8 further including at least one appropriate light-resistant improver.
- 11. The optical recording medium according to claim 8, 9, or 10 which uses a laser beam with a wavelength of 450 nm or less as a writing light.
Priority Claims (1)
Number |
Date |
Country |
Kind |
JP 358949/1999 |
Dec 1999 |
JP |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The present application is a divisional of Ser. No. 09/913,730, filed Aug. 17, 2001 which is the national stage under 35 U.S.C. 371 of international application PCT/JP00/08297, filed Nov. 24, 2000 which designated the United States, and which international application was published under PCT Article 21(2) in the English language, the entire contents of which are hereby incorporated by reference.
Divisions (1)
|
Number |
Date |
Country |
Parent |
09913730 |
Aug 2001 |
US |
Child |
10438839 |
May 2003 |
US |