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.
Abstract:
An optical recording medium having two or more information recording layers in which information is recorded at high recording density. The incidence of light on the information recording layer disposed far from the top layer through which light enters and the returning light from the information recording layer can be detected at high efficiency. The recording/reproducing characteristics are favorable. An optical recording/reproducing method for at least reproducing/recording information from/on this optical recording medium is also disclosed. The optical recording medium (10) comprises information recording layers (21, 22) between a first major surface on which light can be incident and a second major surface opposed to the first major surface. The first information recording layer (21) nearest to the second major surface is a phase-modulation information recording layer, and the second information recording layer (22) is a reflectance-modulation information recording layer. Information is reproduced or recorded from or in the first information recording medium (21) of the optical recording medium (10) by a phase modulation method, and information is reproduced or recorded from or in the second information recording layer (22) by a reflectance modulation method.
Abstract:
A write-once optical record medium in which a record layer and a light-transmitting protective layer are formed in order on a support, and record and reproduction are performed by irradiating the light-transmitting protective layer with a laser beam of a wavelength of 380-450 nm, wherein the wavelength μmax at which the light absorption coefficient of the record layer reaches a peak is μmax
Abstract:
PROBLEM TO BE SOLVED: To enable a plurality of pulses to emit at a pulse interval shorter than a pulse period which can be generated by a laser beam source. SOLUTION: In an optical disk device 1, a pulse train creating section 11 causes the laser beam source 21 to emit the light beam L1 containing pulses P0 and a pulse conversion section 23 divides the light beam L1 into the pulse train PL composed of four pulses with the interval of about 1 [ns]. An optical pickup 7 converges the light beam L containing the pulse trains PL on a recording layer 101 by an objective lens 8. Thus, the optical pickup 7 can generate a reaction caused by an excited state absorption by second and succeeding pulses P2 to P4 while keeping the excited state of a recording material M which is generated by two-photon absorption of a first pulse P1 in the neighborhood of a focus F of the light beam L, and therefore a recording mark RM can be formed on a recording layer 101 in an extremely short period of time. As a result, an information recording speed of the optical disk device 1 can be improved. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an optical information recording medium capable of increasing recording capacity, an optical information recording device and an optical information recording method. SOLUTION: The optical information recording medium 100, wherein a recording mark RM is formed in only a region where both two-photon absorption reaction according to a recording light beam L1a of the recording light beam L1 and thermal reaction according to a recording light beam L1b radiated after the recording light beam L1a of the recording light beam L1 are generated, is irradiated with a recording light beam L1. The recording light beams L1a and L1b are radiated so that only parts of absorption change region RA to be a first irradiation region irradiated with the recording light beam L1a and a spot PB to be a second irradiation region irradiated with the recording light beam L1b are overlapped by positioning a focal point F1 of the recording light beam L1 in a desired target position PG. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To generate two-photon absorption reaction to an optical beam with a short wavelength. SOLUTION: A recording layer 101 of an optical information recording medium 100 includes a compound with a hexadiyne structure having two acetylene groups bonded with a σ bond at the center expressed by general formula (2) as a two-photon absorbing material. When information is recorded for forming a recording mark RM to the recording layer 101, the recording mark RM is formed by generating the two-photon absorption reaction in accordance with a recording light with a collected short wavelength. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PURPOSE:To improve a traveling property and durability and to obtain good recording and reproducing characteristics when the above recording medium is used as a tape-shaped optical recording medium. CONSTITUTION:A protective film having an adequate contact angle with water and glass transition point is formed at 0.25 to 05lambda/n (lambda: the wavelength of reproducing light, (n): the refractive index of the protective film) film thickness. The protective film satisfying such characteristics include a protective film consisting of a fluorine polymer.