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Dynamic Information Storage Or Retrieval > Specific Detail Of Information Handling Portion Of System > Radiation Beam Modification Of Or By Storage Medium > Light Intensity Adjustment Or Maintenance

Light Intensity Adjustment Or Maintenance

Light Intensity Adjustment Or Maintenance patent applications listed include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.

03/20/14 - 20140078878 - Non-resonant two-photon absorption recording material, non-resonant polymer two-photon absorption optical information recording medium, and recording/reproducing method
The present invention provides a non-resonant two-photon absorption recording material containing a non-resonant polymer two-photon absorption compound, and the non-resonant two-photon absorption recording material wherein the main chain of the non-resonant polymer two-photon absorption compound contains at least one member selected from polystyrene, polyacrylate, polymethacrylate, polyester, polyurethane, polyether and polyimide,...

02/06/14 - 20140036651 - Reproducing device and reproducing method
A reproducing device includes a light generation and emission unit that obtains signal light as reflection light, which reflects recording signals of a land and a groove, by irradiating an optical recording medium with light and generates reference light so as to emit the signal light and the reference light...

01/23/14 - 20140022881 - Information recording method, information recording apparatus, information recording medium, and medium estimating method
A recording waveform is adjusted based on the fluctuation amount of the mark edge position, focused on that fluctuation of a mark edge position is increased in aged deterioration of a recording signal. Specifically, the recording waveform is adjusted such that a fluctuation amount becomes minimum or a threshold value...

01/02/14 - 20140003222 - Optical information apparatus and gap control method thereof
An optical disk apparatus has: a laser (14) that outputs light; an optical system that includes an SIL (2) for forming a predetermined sized beam spot on an optical disk (1) using the light from the laser; a detector (26) that detects output power of the laser and generates a...

12/05/13 - 20130322226 - Optical disc device and optical disc reproduction method
An optical disc device is configured to reproduce an optical disc. The optical disc device includes an optical pickup and a driver. The optical pickup has a laser irradiation component that is configured to emit a laser beam to the optical disc for obtaining a return light. The driver is...

09/05/13 - 20130229904 - Optical information storage medium reproduction apparatus and control method of the same
A reproduction method for reproducing a rewritable and readable optical information storage medium in such a manner that an information recording layer is disclosed. The reproduction method comprising: reading setting information of reproduction laser power for each information recording layer of the rewritable and readable optical information storage medium, the...

08/22/13 - 20130215731 - Optical information recording device, optical information recording method and optical information recording medium
PbN/PwN>PbM/PwM....

06/27/13 - 20130163401 - Optical disc apparatus and optical power control method
An optical disc apparatus includes: a light source; a power detection portion that detects optical power of light emitted from the light source; a temperature detection portion that detects an ambient temperature of the power detection portion; a storage portion in which information relating to a temperature drift characteristic of...

03/15/12 - 20120063288 - Recording apparatus
A recording apparatus for recording information on an optical recording medium includes a mode-locked laser unit that includes a semiconductor laser emitting a laser beam for recording the information on the optical recording medium, and an external resonator, an optical modulation unit that amplifies and modulates the laser beam emitted...

03/15/12 - 20120063289 - Metal complex and use thereof
There is provided a metal complex that is large in degree of a change in emission intensity, the change being caused by a change in molecular structure of a ligand through a photochromic reaction. The metal complex is arranged such that a diarylethene-based photochromic molecule coordinates to a metal ion...

01/12/12 - 20120008486 - Recording device and apc correction method
A recording device includes a light irradiation portion which irradiates an optical recording medium with laser light emitted from a light source via a field lens, a light emission drive portion which drives and causes the light source to emit light, a front monitor which receives the laser light emitted...

04/14/11 - 20110085434 - Multi-layer optical disc, information recording method and information reproducing method
According to one embodiment, single-sided dual-layer recordable disc 100 may be used. Information recording is performed by forming mark and space portions on data area DA using modulated laser power. Pp denotes the maximum laser power or peak power for forming the mark portion, and Pb denotes the bias power...

12/30/10 - 20100329103 - Method and apparatus for mastering tracks on a disc by utilizing an electron beam, and respective data disc
The method provides a recording of data on a rotating disc by using an electron beam for recording marks along a track on the disc, the electron beam performing a wobble oscillation in a radial direction of the disc with a wobble amplitude for recording at least two tracks in...

07/08/10 - 20100172230 - Optical disc drive apparatus and optical disc reproduction method using the same
An optical disc drive apparatus (100) of the present invention rotates an optical disc (1) at a predetermined rotation speed using a motor (2). An optical pickup (3) irradiates the optical disc (1) with a laser beam (5) emitted from its internal semiconductor laser (4), and obtains a reproduction signal...

07/01/10 - 20100165823 - Optical pickup device and information processor
In an optical beam transmissive adjusting mechanism (110) included in an optical pickup device, arrangement positions of a first transmissive element (111) having a first transmittance and a second transmissive element (112) having a second transmittance higher than the first transmittance are switched by a rotational drive unit (105), and...

05/06/10 - 20100110866 - Optical disc reproducing light quantity setting method and optical disc apparatus
In a method of setting a quantity of light directed onto an optical disc for reproduction purposes, an area of the optical disc in which information has been recorded is reproduced with a test-reproducing light quantity (S14, S24), a reproduction time or number of reproductions up to the time when...

12/17/09 - 20090310470 - Method for producing a data carrier and data carrier produced therefrom
A method of producing a data carrier with a marking is disclosed. The data carrier includes a laser-markable portion and a beam-modifying portion adjacent the laser-markable portion. The beam-modifying portion has a beam modifying property. The method includes irradiating a laser beam through the beam-modifying portion to allow the beam...

08/13/09 - 20090201790 - Operating current modifying device and method
An operating current modifying device is provided for a power generating element. The power generating element generates an output power when the operating current is larger than a threshold current in the power generating element. A functional relationship is between the threshold current and the temperature of the electrical device....

07/09/09 - 20090175152 - Optical disk apparatus and optical pickup
Provided is an optical disk apparatus that suppresses shortening of the life time of a light source, degradation of the signal quality involved in an increase in quantum noise, and lowering of the slope efficiency, which are caused by a temperature increase of the light source by a lowering in...

06/18/09 - 20090154326 - Optical recording and reading equipment
Disclosed herewith is a data recording and reading equipment capable of reducing laser noise easily. At first, a laser beam source that can reduce the laser noise when reading data from a subject optical disk is obtained. A modulator capable of varying laser attenuation with a voltage is disposed so...

05/07/09 - 20090116365 - Optical recording medium and optical recording method
where τw denotes the sum of the length of the heating pulses, and τb denotes the sum of the length of the cooling pulses....

02/26/09 - 20090052306 - Semiconductor laser generator and method of controlling the same, and optical disk device
The present invention provides a laser generator that allows recording quality to be improved, a method of controlling the laser generator, and an optical disk device. In a laser emitting device including a semiconductor laser diode emitting laser and a semiconductor laser diode driving section supplying a driving pulse to...

02/19/09 - 20090046565 - Method for determining optimum laser beam power and otical recording medium
To provide a method for determining an optimum laser beam power for a single-side, dual-layer optical recording medium having first and second information layers, the method including: determining an optimum laser beam power based on a predetermined characteristic value at the time when the number of overwrite cycles on the...