Abstract:
A novel rewritable optical information recording medium having a recording layer consisting of an organic dye film and capable of reversibly recording/erasing information by laser beam irradiation. A novel rewritable optical information recording medium having as a recording film at least one layer of organic dye film consisting of practically at least one kind of organic dye compound. Information is recorded and erased by reversible physical changes caused by laser beam irradiation on an organic dye film single element. Specifically, data is recorded by a local physical change by recording laser ray irradiation, data is reproduced by detecting the returned optical intensity change of a reproducing laser beam less powerful than a recording laser beam, and data is erased by at least one application of a continuous beam or a pulse beam more powerful than a reproducing laser beam and less powerful than a recording laser beam. A physical change involves a shape change.
Abstract:
A novel rewritable optical information recording medium having a recording layer consisting of an organic dye film and capable of reversibly recording/erasing information by laser beam irradiation. A novel rewritable optical information recording medium having as a recording film at least one layer of organic dye film consisting of practically at least one kind of organic dye compound. Information is recorded and erased by reversible physical changes caused by laser beam irradiation on an organic dye film single element. Specifically, data is recorded by a local physical change by recording laser ray irradiation, data is reproduced by detecting the returned optical intensity change of a reproducing laser beam less powerful than a recording laser beam, and data is erased by at least one application of a continuous beam or a pulse beam more powerful than a reproducing laser beam and less powerful than a recording laser beam. A physical change involves a shape change.
Abstract:
Optical data medium containing a preferably transparent substrate which is optionally already coated with one or more barrier layers and on the surface of which an information layer which can be recorded on using light, optionally one or more barrier layers, and a cover layer, have been applied, which data medium can be recorded on and read using focused blue light through the cover layer on the information layer, preferably laser light with the wavelength between 360 nm and 460 nm, the information layer containing a light-absorbing compound and optionally a binder, characterized in that at least one dye is used as the light-absorbing compound wherein the cover layer on the top of the information layer including the adhesive layer do have a total thickness of 10 µm to 177 µm and the numerical aperture NA of the focusing objective lens setup is greater or equal 0.8.
Abstract:
Optical data medium containing, in the information layer, a dye as a light-absorbing compoundA b s t r a c tOptical data medium containing a preferably transparent substrate which is optionally already coated with one or more barrier layers and on the surface of which an information layer which can be recorded on using light, optionally one or more barrier layers, and a cover layer containing a radiation-cured resin, have been applied, which data medium can be recorded on and read using focused blue light through the cover layer on the information layer, preferably laser light with the wavelength between 360 nm and 460 nm, the information layer containing a light-absorbing characterized in that at least one dye is used as the light-absorbing compound wherein the cover layer does have a total thickness of 10 microm to 177 (m and the numerical aperture NA of the focusing objective lens setup is greater or equal 0.8.
Abstract:
A DIELECTRIC PART 4 COMPRISING A NITRIDE LAYER 7 AND AN OXIDE 8, LAID ONE UPON THE OTHER, IS FORMED ON A DATQA-RECORDING LAYER 3. AT LIGHT-TRANSMITTING LAYER 5 IS BONED WITH ADHESIVE TO THE DIELELCTRIC PART 4. SINCE THE DIELECTRIC PART 4 IS INTERPOSED BETWEEN THE DATA-RECORDING LAYER 3 AND THE LIGHT TRANSMITTING LAYER 5, THE ORGANIC MATERIAL OF THE DATA-RECORDING LAYER 3 DOES NOT DIFFUSE INTO THE ADHESIVE THAT BONDS THE LIGHT EMITTING LAYER TO THE DIELECTRIC LAYER 4. ADDITIONALLY, THE DATA-RECODING LAYER 3 IS NOT DTERIORATED DUE TO OXYGEN PLASMA GENERATED DURING THE PROCESS OF FORMING THE OXIDE LAYER 8 BECAUSE THE OXIDE LAYER 8 IS PROVIDED ON THE NITRIDE LAYER. SINCE THE NITIRDE LAYER 7 HAS A THICKNESS OF 10 NM OR LESS, IT DOES NOT INFLUENCE OPTICAL ENHANCEMENT EFFECT.
Abstract:
A laser scanning apparatus raster scans an input laser beam ( 0) by using an acousto-optic deflector arrangement. The laser beam is horizontally scanned by a pair of acousto-optic deflectors (13a, 13b). Thus, a laser scanning apparatus can be realised which is low in noise, of excellent durability, small in size, light in weight and which can display a picture of high quality at high speed.
Abstract:
An optical recording medium using Sn as the recording material to improve the jitter is provided, in which on the surface of a disc substrate 11 where a concave and convex shape dividing a track area is formed, are formed on the surface of the concave and convex shape a first protective layer 31 for protecting at least an optical recording layer 31, an optical recording layer 12 using a chemical compound at least composed of tin (Sn), nitrogen (N) and oxygen (O), formed on the first protective layer, a second protective layer 32 for protecting this optical recording layer, formed on this optical recording layer, and a light-transmittable layer 13 formed on the second protective layer; with this structure, the optical recording layer 12 under high temperature and high humidity can be stabilized by means of the first and second protective layers 31 and 32.
Abstract:
A rewritable optical information recording medium including a recording layer composed of an organic dye film is provided, in which recording and erasing information can be performed reversibly by laser light irradiation. A rewritable optical information recording medium including at least one organic dye film which is substantially made of only at least one kind of organic dye compounds as a recording film is provided. The recording and erasure of information are performed by a reversible physical change of the organic dye film substance caused by laser light irradiation. Specifically, data recording is performed by a physical change locally caused by the irradiation of recording laser light, data reproduction is performed by detecting change in intensity of returned light of reproducing laser light having less power than the recording laser light, and data erasure is performed by applying at least once continuous light or pulse light having laser power more than the reproducing laser light and less than the recording laser light. The physical change is a change in shape.