Abstract: This invention provides a method for producing a CD-R optical recording medium. A first stack at a first stage is created by forming on a substrate a recording layer containing an organic dyestuff and a metal layer. At least after a formation of the metal layer; the first stack is transported from the first stage along a transport path towards a second stage through an atmosphere having a relative humidity. The relative humidity is maintained at 40% or less. To control the relative humidity, a shielding plate may be provided around the transport path. An air conditioner may locally control the relative humidity of an area encircled by this shielding plate.

Abstract: An optical recording medium in which a high recording density is to be realized as compatibility with respect to a pre-existing optical recording medium is kept. A wobbling groove 5 is formed on a disc substrate 1. The modulation/demodulation system for the wobbling signals recorded on the wobbling groove 5 and that for information signals recorded and/or reproduced on or from the recording track are made to be the same as the modulation/demodulation system for a standardized pre-existing optical recording medium. Moreover, if the track pitch of kept recording track is Tp, the shortest recording mark period in recording on kept recording track is Mc, the wavelength of a light beam used in recording and/or reproducing kept recording track is &lgr;, and the numerical aperture of the objective lens is NA, the following relation (1) to (3) X=Tp/(&lgr;/NA)  (1) Y=Mc/(&lgr;/NA)  (2) Y>2.9118X2−5.5422X+3.19  (3) are met.

Abstract: An optical recording medium which can provide a wobbling signal at a sufficiently high level even if the track pitch is reduced to enhance the recording density. The recording medium can attain a practically adequate recording-reproducing characteristic such as jitter characteristic. The medium has a wobbling groove that has a depth falling within the range of &lgr;/2.90 n to &lgr;/2.15 n. Here, &lgr; is the wavelength of a light beam applied to record and reproduce signals and n is the refractive index of the substrate of the optical recording medium. The ratio of the width Wg of the wobbling groove to the track pitch Tp (Wg/Tp) falls within the range of 25.0% to 45.5%.

Abstract: The present invention enables to realize a high recording density while suppressing the wobble signal jitter component to a sufficiently low value for practical use, thereby enabling to perform information recording/reproducing in a stable manner. The recording track has a track pitch set to 1.3 micrometers or below and the recording layer is formed by a recording material containing a dye having a characteristic appropriate to suppress the wobble signal jitter component to a low value.

Abstract: In a recording material, physical characteristic information of the recording medium, and more specifically, material information representing the material of the disc, is recorded. Accordingly, a recording apparatus and a reading apparatus easily and accurately determine the physical characteristics of the disc, thereby making it possible to provide suitable setting for performing an operation.

Abstract: The present invention enables to realize a high recording density while suppressing the wobble signal jitter component to a sufficiently low value for practical use, thereby enabling to perform information recording/reproducing in a stable manner. The recording track has a track pitch set to 1.3 micrometers or below and the recording layer is formed by a recording material containing a dye having a characteristic appropriate to suppress the wobble signal jitter component to a low value.

Abstract: A recording medium based on the organic dye having excellent storage reliability is to be produced. In producing an optical recording medium having on a substrate a recording layer containing an organic dyestuff and a metal layer, the metal layer is first formed, and the atmosphere of a transport path used for transferring the resulting product to the next stage is set to the relative humidity of 40% or less. The metal layer may e.g., be a reflective layer. In controlling the relative humidity, a shielding plate is provided around the transport path and the relative humidity of an area encircled by this shielding plate is controlled by an air conditioner.

Abstract: An optical recording medium which can provide a wobbling signal at a sufficiently high level even if the track pitch is reduced to enhance the recording density. The recording medium can attain a practically adequate recording-reproducing characteristic such as jitter characteristic. The medium has a wobbling groove that has a depth falling within the range of ë/2.90n to ë/2.15n. Here, ë is the wavelength of a light beam applied to record and reproduce signals and n is the refractive index of the substrate of the optical recording medium. The ratio of the width Wg of the wobbling groove to the track pitch Tp (Wg/Tp) falls within the range of 25.0% to 45.5%.

Abstract: An optical recording medium in which a high recording density is to be realized as compatibility with respect to a pre-existing optical recording medium is kept. A wobbling groove 5 is formed on a disc substrate 1. The modulation/demodulation system for the wobbling signals recorded on the wobbling groove 5 and that for information signals recorded and/or reproduced on or from the recording track are made to be the same as the modulation/demodulation system for a standardized pre-existing optical recording medium.