Claims
- 1. A method for recording optical information, comprising the steps of:
- providing an optical recording medium comprising a light-absorbing and heat-generating layer for absorbing light to convert absorbed light into heat, and a recording layer group layer disposed adjacent said light-absorbing and heat-generating layer, said recording layer group layer comprising a plurality of alternatingly stacked thermo-sensitive recording layers and heat-insulating layers, said thermo-sensitive recording layers all having the same composition, and said light-absorbing and heat-generating layer having a different composition than said recording layers; and
- radiating and focusing laser light from a single laser light source on said light-absorbing and heat-generating layer while modulating the recording energy of said laser light in accordance with a multi-valued signal to record said multi-valued signal on said optical recording medium in the form of phase changes of said thermo-sensitive recording layers, wherein a number of said thermo-sensitive recording layers whose phase is changed by said laser light varies stepwise in accordance with said recording energy of said laser light and with the corresponding value of said multi-valued signal.
- 2. The method for recording optical information of claim 1, wherein said step of providing said optical recording medium further comprises providing a light-reflecting layer adjacent said light-absorbing and heat-generating layer.
- 3. The method for recording optical information of claim 1, wherein said thermo-sensitive recording layers are formed of InSe.
- 4. The method for recording optical information of claim 1, wherein said thermo-sensitive recording layers are formed of an imidazoquinoxaline-type coloring material.
- 5. The method for recording optical information of claim 1, wherein said heat-insulating layers are formed of a high molecular weight material.
- 6. The method for recording optical information of claim 5, wherein said high molecular weight material is Teflon.
- 7. The method for recording optical information of claim 1, wherein said heat-insulating layers are formed of SiO.sub.2.
- 8. The method for recording optical information of claim 1, wherein said heat-insulating layers are formed of a material which is transparent to the wavelength of said laser light.
- 9. The method for recording optical information of claim 1, wherein said light-absorbing heat-generating layer is formed of a cyanine dye.
- 10. The method for recording optical information of claim 1, wherein said step of modulating the recording energy of said laser light comprises varying a power of said laser light.
- 11. The method for recording optical information of claim 1, wherein said step of modulating the recording energy of said laser light comprises varying a recording time of said laser light on said optical recording medium.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2-75680 |
Mar 1990 |
JPX |
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Parent Case Info
This is a continuation of application Ser. No. 07/671,339, filed Mar. 19, 1991, now abandoned.
US Referenced Citations (14)
Foreign Referenced Citations (6)
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56-74843 |
Jun 1981 |
JPX |
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JPX |
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JPX |
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Jun 1988 |
JPX |
1-149245 |
Jun 1989 |
JPX |
1291987 |
Oct 1989 |
JPX |
Non-Patent Literature Citations (2)
Entry |
CRC Handbook of Chemistry & Physics (1982-1983) p. C-783. |
Wescon Technical Papers vol. 12, 1968 (1-6) Carlson & Ives. |
Continuations (1)
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Number |
Date |
Country |
Parent |
671339 |
Mar 1991 |
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