Claims
- 1. A playback apparatus comprising on optical information recording medium, and an optical head equipped with a laser beam generator capable of reading out information from the optical information recording medium, said optical information recording medium comprising a substrate and an information recording layer formed on the substrate, said information recording layer comprising at least two organic dyes having different chemical structures and continuous playback ability of 10.sup.5 times or more at a playback laser power of 0.5 to 1.5 mW, one of said two organic dyes having a bulky structure wherein large side chains are projected from a central atom and a pyrolysis beginning temperature of 300.degree. C. or less and selected from the group consisting of derivatives of azaphthalocyanine, phthalocyanine and naphthalocyanine, and another of said two organic dyes being a thermal quencher having a flat structure and a pyrolysis beginning temperatures of 350.degree. C. or higher and a function for preventing thermal deterioration.
- 2. A playback apparatus according to claim 1, wherein the laser beam generator emits a laser beam having a wavelength of 640 to 720 nm or 780 to 830 nm.
- 3. A playback apparatus according to claim 1, wherein the organic dye having a bulky structure is represented by the formula ##STR6## wherein M.sub.1 is metallic atom selected from Si, Ge and Sn belonging to the group IV of the periodic table; Z.sub.1, Z.sub.2, Z.sub.3 and Z.sub.4 are independently a pyridine ring, a benzene ring or a naphthalene ring non-substituted or having one or more mono-valent substituents -X; X is an alkyl group, and alkenyl group, an alkylthio group, a phenyl group, an acyl group or a tri-substituted silyl group; Y.sub.1 and Y.sub.2 are independently --Ar, --Or, --OASr, --OSi.paren open-st.R).sub.3, --OSi.paren open-st.OR).sub.3 or --OC(C.sub.6 H.sub.5).sub.3 ; R is a straight- or branched-chain alkyl group; and Ar is a phenyl group, a substituted phenyl group, a benzyl group or a substituted benzyl group.
- 4. A playback apparatus according to claim 1, wherein the thermal quencher having a flat structure is represented by the formula: ##STR7## wherein M is a transition metal; Z.sub.1, Z.sub.2, Z.sub.3 and Z.sub.4 are independently a pyridine ring, a benzene ring or a naphthalene ring non-substituted or having one more monovalent substituents -X and X is an alkyl group, an alkenyl group, an alkylthio group, a phenyl group, and acyl group or a tri-substituted silyl group.
- 5. A playback apparatus according to claim 1, wherein the organic dye having a bulky structure is represented by the formula: ##STR8## wherein M.sub.1 is a metallic atom selected from Si, Ge and Sn belonging to the group IV of the periodic table; Z.sub.1, Z.sub.2, Z.sub.3 and Z.sub.4 are independently a pyridine ring, a benzene ring or a naphthalene ring non-substituted or having one or more monovalent substituents -X; X is an alkyl group, an alkenyl group, an alkylthio group, a phenyl group, an acyl group or a tri-substituted silyl group; Y.sub.1 and Y.sub.2 are independently --Ar, --Or, --OAr, --OSi.paren open-st.R.sub.3), --OSi.paren open-st.OR).sub.3, --OSi(OR).sub.3, --OSi(OAr).sub.3 or --OC(C.sub.6 H.sub.5).sub.3 ; R is a straight- or branched-chain alkyl group; and Ar is a phenyl group, a substituted phenyl group, a benzyl group or a substituted benzyl group and the thermal quencher having a flat structure is represented by the formula: ##STR9## wherein M is a transition metal; and Z.sub.1, Z.sub.2, Z.sub.3 and Z.sub.4 and X are defined as above.
- 6. A playback apparatus according to claim 1, wherein in the formula (I) M.sub.1 is Si; Z.sub.1, Z.sub.2, Z.sub.3 and Z.sub.4 are independently a naphthalene ring or a benzene ring; X is a tri-substituted silyl group; Y.sub.1 and Y.sub.2 are independently --OSi.paren open-st.R).sub.3 ; and R is a straight- or branched-chain alkyl group; and in the formula (II) M is Cu, Zn or Si; Z.sub.1, Z.sub.2, Z.sub.3 and Z.sub.4 are independently a naphthalene ring or a benzene ring; and Z is an alkyl group or a tri-substituted silyl group.
- 7. A playback apparatus according to claim 1, further comprising a revolving means for revolving the optical information recording medium, a drive circuit for controlling the action of the optical head and the number of revolutions of the revolving means, a processor for instructing the drive circuit, an input means for inputting information into the processor, and an output means for outputting information from the processor.
Priority Claims (3)
Number |
Date |
Country |
Kind |
1-221817 |
Aug 1989 |
JPX |
|
1-314065 |
Dec 1989 |
JPX |
|
2-110069 |
Apr 1990 |
JPX |
|
Parent Case Info
This application is a Divisional application of application Ser. No. 172,169, filed Dec. 23, 1993, now abandoned, which application is a Divisional application of application Ser. No. 574,069, filed Aug. 29, 1990 (now U.S. Pat. No. 5,281,512).
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4412231 |
Namba et al. |
Oct 1983 |
|
4769307 |
Ozawa et al. |
Sep 1988 |
|
4873131 |
Kashima et al. |
Oct 1989 |
|
4897827 |
Raetzer et al. |
Jan 1990 |
|
5281512 |
Kobayashi et al. |
Jan 1994 |
|
Divisions (2)
|
Number |
Date |
Country |
Parent |
172169 |
Dec 1993 |
|
Parent |
574069 |
Aug 1990 |
|