Abstract: An information recording apparatus carries out DC writing on a section B to change a reflectivity from a recording surface to display a visible character or image. Next, the apparatus writes record data on each of sections A to C under a special recording condition. The special recording condition is a recording condition that: makes excellent the recording characteristics of each of the sections A to C after the record data has been recorded, and sets the pulse width of a write signal for writing a shortest mark to be shorter than an optimum pulse width.

Abstract: An information recording apparatus (1) is provided with: a recording device (501) for recording record information onto an information recording medium (100) by irradiating laser light (LB) with a predetermined power; an adding device (550) for adding weight to at least one of a plurality of reproduction features associated with the record information; and a controlling device (504, 550) for controlling the recording device to record the record information with a power in which the at least one reproduction feature with the weight added satisfies a predetermined first reference.

Abstract: An information recording/reproducing device which can record or reproduce the predetermined information quickly and properly is proposed. An information recording/reproducing device 10 detects recording condition of an area in radial direction of an optical medium 2 using the rotation angle in a layer 0 as a standard when recording given data in a layer 1 of the optical medium 2 and on the basis of the detection result, controls power of laser beam irradiated on the layer 1 to record or reproduce given recording data.

Abstract: In an information recording medium including at least a first recording layer (L0 layer) capable of recording information and a second recording layer (L1 layer) capable of recording information, an information recording device (300) records information in a predetermined area (12) of the second recording layer by a laser beam which has passed through a transmission area (11) of the first recording layer. The information recording medium (300) includes recording means (302, etc.) for recording the information in the first recording layer or the second recording layer, judgment means for judging whether an unrecorded amount indicating the size of the unrecorded area in the radial direction in the transmission area is smaller than a predetermined amount, and control means used when the unrecorded area is judged to be smaller than the predetermined amount, for controlling the recording means to record information in the predetermined area.

Abstract: A recording device (1T or the like) is provided with (i) recording elements (50, 40) for recording data by irradiating a recording medium with laser beams; (ii) driving members (33T, 33F, 55T, 55F, 54) for performing tracking process or focusing process; (iii) a servo elements (31T, 31F) for automatically controlling the driving members based on an error signal; (iv) specifying elements (21, 22) for specifying an area where a recording medium characteristic (core eccentricity or the like) is not good, based on a high frequency component included in the error signal; and (v) a control unit (10) for (v-i) controlling the servo unit to change the gain in the automatic control, and for (v-ii) controlling the recording elements to change the recording power of the laser beams, in the specified area.

Abstract: A recording apparatus includes: a recording device for recording data onto each of a plurality of types of recording media by irradiating a light beam corresponding to each of the types of recording media; a diffracting device disposed on an optical path of the light beam from the recording device to the recording medium, for generating a main beam and a plurality of sub beams by diffracting the optical beam, the main beam recording data and performing a tracking process, the sub beams performing the tracking process, an amplitude of a tracking signal generated by each or one portion of the sub beams and by the main beam being maximum; a controlling device for controlling the diffracting device to adjust a position on which each of the plurality of sub beams is focused, in accordance with the type of the recording medium; and a tracking device.

Abstract: It is an object to provide an information recording device capable of recording recording information with good recording property without wasting a recording region on an optical disk and capable of clearly forming visible portion.

Abstract: An information recording apparatus (300) is provided with: a first recording device (302 etc.) for recording the first information into a first area of the first layer; a second recording device (302 etc.) for recording the second information into a predetermined area of the second layer; and a controlling device (305) for controlling the second recording device to record the second information by the laser light, while displacing an edge indicating an innermost or outermost circumference of the predetermined area in which a penetrated area penetrated by the laser light is included in the first area, in a direction to approach an edge of the predetermined area in which the penetrated area is not included in the first area, only by a predetermined length corresponding to a tolerance of a change amount indicating a change in the reproduction quality.

Abstract: A recording apparatus for recording record data onto a recording medium on which a plurality of recording layers are formed in a thickness direction, is provided with: a recording device for recording the record data into each of the plurality of recording layers by emitting each of a plurality of recording light beams to be focused on a corresponding one of the plurality of recording layers; a calculating device for calculating a leaked beam feature of another recording light beam, which is emitted to be focused on another recording layer other than one recording layer of the plurality of recording layers, leaking to the one recording layer; and an adjusting device for adjusting an emission condition of at least one of the plurality of recording light beams, on the basis of the calculated leaked beam feature.

Abstract: An information recording device and method capable of forming a recording mark by suppressing thermal interference. The device applies a laser beam to a recording medium and forms a recording mark in accordance with a recording signal. The device includes a light source for emitting the laser beam, signal generation elements for generating a recording pulse signal according to the recording signal, and drive elements for driving the light source according to the recording pulse signal. The recording pulse signal has a mark period for forming the recording mark and a space period. The recording pulse signal makes the level in the entire space period equal to or shorter than a predetermined length and a part of the space period longer than the predetermined length to be off level. While the recording pulse signal is off level, the recording medium is cooled down, thereby suppressing the affect of thermal interference.

Abstract: An information recording apparatus changes a write strategy to reduce a pulse width of a write pulse to write a minimum mark, and records data based on the changed write strategy.

Abstract: 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.

Abstract: An information recording device (1) is provided with recording element (3 and the like) for recording a recording mark by irradiating an information recording medium (100) with a laser beam; setting element (11 and the like) for setting recording conditions, corresponding to changes of the characteristics of the information recording medium with time; and control element (10 and the like) for controlling the recording element to record the recording mark under the set recording conditions.

Abstract: An information recording apparatus (300) is provided with: a recording device (352) for irradiating an information recording medium (100) with laser light and for recording information onto the information recording medium; an obtaining device (354) for obtaining at least one of (i) a special OPC strategy for defining a waveform of the laser light used to calculate an optimum laser power of the laser light for recording the information at a second recording speed different from a first recording speed, at the first recording speed, and (ii) a recording strategy for defining a waveform of the laser light used to record the information at the second recording speed; a power calculating device (354) for calculating the optimum laser power by using the special OPC strategy at the first recording speed; and a controlling device (354) for controlling said recording device to record the information at the second recording speed, by using the calculated optimum laser power and the recording strategy.

Abstract: The present invention is directed to improve precision of tracking correction and focus correction while assuring stability of the tracking correction and focus correction during recording/reproducing of data to/from an optical disk. Before start of recording/reproduction, an optical disk DK is searched once. On the basis of a radial acceleration component in a tracking error signal Ste, an area where a mechanical distortion occurs in the optical disk DK is specified. At the time of actually recording/reproducing data to/from the optical disk DK, the gain in a tracking servo circuit TS is temporarily improved only at the time of recording/reproducing data to/from the area specified as an area where a mechanical distortion or the like occurs. Also, even in the case where the gain is varied by performing optimum phase compensation on the gain set by using an optimum phase compensation by-gain circuit 23, reliable phase compensation is realized.

Abstract: The present invention provides a recording pulse generating apparatus capable of forming a recording pit having a proper shape even at the time of ultra-high-speed recording of, for example, 8×recording or higher. A recording controller 10 for generating recording pulse signals having lengths corresponding to ten kinds of lengths of pits formed at the time of recording information has a recording controller 10 for generating the recording pulse signals so that the amplitude of a recording pulse signal corresponding to a pit having a length of 4T changes from a first amplitude to a second amplitude, and generating the recording pulse signals so that the amplitude of a recording pulse signal corresponding to a pit having a length of 5T or longer changes from a third amplitude to a fourth amplitude and further changes to a fifth amplitude.

Abstract: A recording apparatus for recording record data onto a recording medium on which a plurality of recording layers are formed in a thickness direction, is provided with: a recording device for recording the record data into each of the plurality of recording layers by emitting each of a plurality of recording light beams to be focused on a corresponding one of the plurality of recording layers; a calculating device for calculating a leaked beam feature of another recording light beam, which is emitted to be focused on another recording layer other than one recording layer of the plurality of recording layers, leaking to the one recording layer; and an adjusting device for adjusting an emission condition of at least one of the plurality of recording light beams, on the basis of the calculated leaked beam feature.

Abstract: The present invention provides a recording pulse generating apparatus capable of forming a recording pit having a proper shape even at the time of ultra-high-speed recording of, for example, 8× recording or higher. A recording controller 10 for generating recording pulse signals having lengths corresponding to ten kinds of lengths of pits formed at the time of recording information has a recording controller 10 for generating the recording pulse signals so that the amplitude of a recording pulse signal corresponding to a pit having a length of 4T changes from a first amplitude to a second amplitude, and generating the recording pulse signals so that the amplitude of a recording pulse signal corresponding to a pit having a length of 5T or longer changes from a third amplitude to a fourth amplitude and further changes to a fifth amplitude.

Abstract: An information recording apparatus (1) comprises a recording means (501) that irradiates a laser beam (LB) having a predetermined power, thereby recording information onto an information recording medium (100); an adding means (550) that adds a weighting to at least one of a plurality of reproduction characteristics related to the information to be recorded; and a control means (504,550) that controls the recording means to record the information by use of a power at which the at least one reproduction characteristic to which the weighting has been added satisfies a predetermined first criterion.

Abstract: An information recording/reproducing device which can record or reproduce the predetermined information quickly and properly is proposed. An information recording/reproducing device 10 detects recording condition of an area in radial direction of an optical medium 2 using the rotation angle in a layer 0 as a standard when recording given data in a layer 1 of the optical medium 2 and on the basis of the detection result, controls power of laser beam irradiated on the layer 1 to record or reproduce given recording data.