摘要:
An information recording medium (100) includes: a first recording layer (107); a semitransparent reflective film (108) to reflect at least one portion of laser light for recording with which the first recording layer is irradiated; a second recording layer (207) which is irradiated with the laser light for recording through the first recording layer and the semitransparent reflective film; and a reflective film (208) to reflect the laser light for recording with which the second recording layer is irradiated, thermal conductivity from the second recording layer to the reflective film when the second recording layer is irradiated with the laser light for recording being substantially equal to thermal conductivity from the first recording layer to the semitransparent reflective film when the first recording layer is irradiated with the laser light for recording
摘要:
There is provided an information recording medium having a plurality of recording layers (layer L0, layer L1) for recording information. At least one of the recording layers (layer L0, layer L1) has a management information area where recording speed management information defining the maximum possible recording speed when recording information is recorded.
摘要:
An optical recording medium, in which a first substrate, a first recording layer, a first reflecting layer, an intermediate layer, a second recording layer, a second reflecting layer, and a second substrate are at least laminated, the optical recording medium further including a transcription layer between the second recording layer and the second reflecting layer. The optical recording medium of the invention can solve a problem of insufficient signal amplitude of one recording layer as compared with the other recording layer in a writable optical recording medium of a conventional double layer structure.
摘要:
There is provided an information recording medium having a plurality of recording layers (layer L0, layer L1) for recording information. At least one of the recording layers (layer L0, layer L1) has a management information area where recording speed management information defining the maximum possible recording speed when recording information is recorded.
摘要:
An optical recording medium of dual layer type is provided which has at least a first substrate, a first recording layer capable of optical recording, a translucent reflecting layer, an intermediate layer, a second recording layer capable of optical recording, and a second substrate in this order from a side where a laser beam for recording, reproduction, or recording/reproduction is applied, wherein the first recording layer is made of an organic dye and the second recording layer is made of a metal material having a higher reflectivity than the organic dye. The optical recording medium provides sufficient signal amplitudes from both recording layers during reproduction, and gives compatibility with a typical optical recording medium during reading.
摘要:
An optical recording medium is provided which can solve a problem of insufficient signal amplitude of one recording layer as compared with the other recording layer in a writable optical recording medium of a conventional double layer structure. An optical recording medium, in which a first substrate having a first groove formed thereon, a first recording layer formed on a first-groove forming surface of the first substrate, a semi-translucent first reflecting layer, an intermediate layer, a second recording layer, a second reflecting layer, and a second substrate having a second groove formed thereon are at least disposed in this order, wherein the optical recording medium further includes a heat conducting layer between the second recording layer and the intermediate layer and a heat insulating layer between the second recording layer and the second reflecting layer.
摘要:
An optical recording medium having a structure comprising at least a first substrate, a first recording layer capable of optical recording, a first reflection layer, an intermediate layer, a second recording layer capable of optical recording, a second reflection layer and a second substrate in this order from a side on which recording, reproducing or recording and reproducing laser light is applied, wherein the intermediate layer is composed of a resin having a glass transition temperature of 90° C. or greater.
摘要:
An optical disk with multi-layered structure provided with at least two recording layers is provided. In respective recording layers, tracks are formed, and the track is formed such that the amount of eccentricity is different in respective recording layers. In the method for identifying the recording layer which identifies the recording layer of the optical disk, the recording layer is identified by detecting the amount of the eccentricity set to the track of the respective recording layers.
摘要:
An optical recording medium has a substrate having an annular grooves, a recording layer including an organic coloring matter and formed on the substrate, and a metallic reflection layer. The recording layer has a thickness so as to have an absorbance between 0.65 and 0.75. Information is recorded in the recording layer by a laser beam having a wavelength between 600 and 700 nm, using an objective lens having a numerical aperture between 0.55 and 0.70.
摘要:
An information recording medium (100) is an optical recording medium in which a groove is made along a recording track and record or reproduction is carried out by irradiating laser light to it and a push-pull signal, which is smaller than a prescribed value, is obtained from a part of a region (101a) of the groove.