Abstract: In an optical disc apparatus, since verify and a parameter change or retry operation are not performed for real time recording, how the reliability of recorded information is secured comes into question. Accordingly, the reliability of the recorded information is secured by increasing the recording power for the real time recording compared with that for recording with verify and increasing the stability of forming a recording mark.

Abstract: An information recording apparatus for recording information to an optical recording medium including a disk-like substrate having a plurality of tracks and associated with a plurality of grooves. A plurality of zones are provided on the disk-like substrate and each zone includes at least two tracks. Each track is divided into a plurality of recording units of substantially the same length. The grooves are wobbled in the radial direction and a length of each recording unit is an integer multiple of a cycle of the wobble which is the same for the different zones. The information recording apparatus includes an irradiation source for irradiating a light spot on the optical recording medium, and a controller for controlling an irradiation position of an optical spot from the irradiation source.

Abstract: An optical reproducing method for an optical medium including a disk-like substrate having a plurality of tracks associated with a plurality of grooves. A plurality of zones are provided with each zone including at least two tracks. Radially adjacent units of a respective zone are delimited by a pair of radial lines joined to form a central angle at an apex proximate to a center of the disk-like substrate with each unit of a respective zone being delimited by the same central angle and units of different zones being delimited by different central angles. The grooves are wobbled in the radial direction and the length is the same for the different zones. The method includes irradiating an optical spot on the optical medium, detecting a reflected beam from the optical medium, and reproducing information on the optical medium by using a signal obtained by the reflected beam.

Abstract: An optical disc apparatus and method for recording and reproducing information to/from an optical disc, including discrimination of the optical disc, reading control information in an un-recordable area formed in an inner periphery of the optical disc, conducting focus control based on a focus error signal in a recordable area formed outside of the un-recordable area, and determining an optimum offset value of the focus error signal in the recordable area. Further, adjustment in amplitude of a reproduced signal from an inner periphery of the recordable area is conducted, test-writing in the inner periphery of the recordable area is conducted, test-writing in an outer periphery of the recordable area is conducted, and adjustment in amplitude of a reproduced signal from the outer periphery of the recordable area is conducted. The respective operations are conducted sequentially so as to make the optical disc in a reproducible and recordable condition.

Abstract: A method for reproducing information from an optical medium including a substrate with grooves and lands serving as recording tracks alternately formed on the substrate in a radial direction, the recording tracks are divided into recording units in the circumferential direction and each recording unit has a prepit area in a non-groove portion of the substrate including a first prepit representative of VFO information and a second prepit representative of address information. The first prepit and second prepit are located on both sides of a center line of one track and formed on each side of the center line of the one track so as to be shared with an adjacent track adjacent the one side of the center line of the track, and every prepit does not exist at opposing positions on both sides of the center line of one track. Information recorded on the optical medium is reproduced.

Abstract: An information recording apparatus for recording information to an optical recording medium including, a disk-like substrate, a spiral or concentric-shaped groove structure along a track formed on a disk-like substrate, the groove structure being wobbled in a radial direction of the optical recording medium, the track being divided into a plurality of recording units in the track direction by at least one radial boundary line, at least two adjacent recording units in the radius direction of the optical recording medium comprise one zone, the optical recording medium including a plurality of zones, and the groove structure included in the adjacent recording units within any zone having substantially same number of wobbling. The information recording apparatus includes an irradiation source for irradiating a light spot on the optical recording medium, and a controller for controlling an irradiation position of an optical spot from the irradiation source.

Abstract: A method for reproducing information from an optical medium including a substrate with grooves and lands alternately formed on the substrate in a radial direction. The grooves and the lands both serve as tracks which are divided into units in the circumferential direction. Each unit has a prepit area in a non-groove portion of the substrate with a first prepit being represented as VFO information in the prepit area and a second prepit being represented as address information in the prepit area. The first prepit and second prepit are located on both sides of a center line of one track and are arranged with respect to one another. The method includes irradiating an optical spot on the optical medium, detecting address information, controlling the irradiation position of the optical spot on the basis of the address information and reproducing information.

Abstract: An optical reproducing method for an optical medium including a disk-like substrate having a plurality of tracks associated with a plurality of grooves. A plurality of zones are provided with each zone including at least two tracks. Radially adjacent units of a respective zone are delimited by a pair of radial lines joined to form a central angle at an apex proximate to a center of the disk-like substrate with each unit of a respective zone being delimited by the same central angle and units of different zones being delimited by different central angles. The grooves are wobbled in the radial direction and the length is the same for the different zones. The method includes irradiating an optical spot on the optical medium, detecting a reflected beam from the optical medium, and reproducing information on the optical medium by using a signal obtained by the reflected beam.

Abstract: An information recording apparatus for recording information to an optical recording medium including a disk-like substrate, a spiral or concentric-shaped groove structure along tracks formed on the disk-like substrate, each of the tracks being divided into a plurality of recording units, each of the recording units including a blank portion of the groove structure along the track in a circumferential direction of the track, the blank portion being a non-groove portion and the groove structure being wobbled in a fixed cycle in a radial direction, the fixed cycle of the wobble continuing in the circumferential direction along the track. The information recording apparatus includes an irradiation source for irradiating a light spot on the optical recording medium, and a controller for controlling an irradiation position of an optical spot from the irradiation source.

Abstract: An optical reproducing method for an optical medium including a disk-like substrate having a groove structure along tracks divided into a plurality of units. Each of the units includes a blank portion of the groove structure along the track which is a non-groove portion. The groove structure is wobbled in a fixed cycle in a radial direction. When the wobble is formed on the blank portion and the blank portion is formed so that a phase of the wobble is formed on the groove structure, a phase of the wobble on the blank portion is continued with a phase of the wobble of the groove structure within another unit adjacent to the blank portion. The method includes irradiating an optical spot on the optical medium, detecting a reflected beam from the optical medium, and reproducing information on the optical medium by using a signal obtained by the reflected beam.

Abstract: An optical reproducing method for an optical medium, including a disk-like substrate, a spiral or concentric-shape groove structure along a track formed on the disk-like substrate, the groove structure being wobbled in a radial direction of the optical medium, the track being divided into a plurality of units in the track direction by at least one radial boundary line and at least two adjacent units in the radial direction of the medium comprise one zone. The optical medium includes a plurality of zones, and the groove structure included in the adjacent units within any zone have substantially a same number of wobbling. The method includes irradiating an optical spot on the optical medium, detecting a reflected beam from the optical medium, and reproducing information on the optical medium by using a signal obtained by the reflected beam.

Abstract: An optical reproducing method for an optical medium including a disk-like substrate, a spiral or concentric-shaped groove structure along a track formed on the disk-like substrate, the groove structure being wobbled in a radial direction of the optical medium, the track being divided into a plurality of units in the track direction by at least one radial boundary line, at least two adjacent units in the radial direction of the optical medium comprise one zone, and the groove structure included in the respective units within one zone having substantially a same number of wobbling. The method includes irradiating an optical spot on the optical medium, detecting a reflected beam from the optical medium, and reproducing information on the optical medium by sing a signal obtained by the reflected beam.

Abstract: An information recording apparatus for recording information to an optical recording medium, including a disk-like substrate, a spiral or concentric-shaped groove structure along tracks formed on the disk-like substrate, each of the tracks being divided into a plurality of recording units, each of the recording units including a blank portion in a circumferential direction of the groove structure, the blank portion being a non-groove portion, the groove structure is formed with a wobble in a fixed cycle in a radial direction, the fixed cycle of the wobble continuing in the circumferential direction along the track; and each length of the recording units is an integer multiple of the cycle of the wobble. The information recording apparatus includes an irradiation source for irradiating a light spot on the optical recording medium, and a controller for controlling an irradiation position of an optical spot from the irradiation source.

Abstract: An information recording medium including a disk-like substrate with a plurality of tracks extending in a circumferential direction on the disk-like substrate and associated with a plurality of grooves. The grooves are wobbled in a radial direction of the disk-like substrate and each track is divided into a plurality of recording units of circular arc shape extending in the circumferential direction. A zone is provided which includes at least two recording units which are adjacent each other in the radial direction, and radially adjacent recording units of a respective zone are delimited by a pair of radial lines joined to form a central angle at an apex proximate to a center of the disk-like substrate. Each recording unit of a respective zone is delimited by the same central angle and the recording units of different zones are delimited by different central angles.

Abstract: An information recording apparatus for recording information to an optical recording medium including, a disk-like substrate, a spiral or concentric-shaped groove structure along a track formed on a disk-like substrate, the groove structure being wobbled in a radial direction of the medium, the track being divided into a plurality of recording units in the track direction by at least one radial boundary line, at least two adjacent recording units in the radial direction of the medium comprise one zone, and the groove structure included in the respective recording units within one zone having substantially same number of wobbling. The information recording apparatus includes an irradiation source for irradiating a light spot on the optical recording medium, and a controller for controlling an irradiation position of an optical spot from the irradiation source.

Abstract: An optical reproducing method for an optical medium, including a disk-like substrate, a spiral or concentric-shaped groove structure along the tracks formed on the disk-like substrate with each of the tracks being divided into a plurality of units including a blank portion in a circumferential direction of the groove structure. The blank portion is a non-groove portion. The groove structure is formed with a wobble in a fixed cycled in a radial direction with the fixed cycle of the wobble continuing in the circumferential direction along the track. Each length of the units is an integer multiple of the cycle of the wobble. The method includes irradiating an optical spot on the optical medium, detecting a reflected beam from the optical medium, and reproducing information on the optical medium by using a signal obtained by the reflected beam.

Abstract: An information recording apparatus for recording information to an optical recording medium including a disk-like substrate having a plurality of tracks and associated with a plurality of grooves. A plurality of zones are provided on the disk-like substrate and each zone includes at least two tracks. Each track is divided into a plurality of recording units of substantially the same length. The grooves are wobbled in the radial direction and a length of each recording unit is an integer multiple of a cycle of the wobble which is the same for the different zones. The information recording apparatus includes an irradiation source for irradiating a light spot on the optical recording medium, and a controller for controlling an irradiation position of an optical spot from the irradiation source.

Abstract: An information recording medium having spiral or concentric-shaped groove structure along a track formed on a disk-like substrate. The medium has the groove structure wobbled in a radius direction of the medium and the track is divided into a plurality of recording units in the track direction by at least one radial boundary. At least two adjacent recording units in the track direction of the medium comprise one zone and the medium includes a plurality of the zones. The groove structure included in the adjacent recording units within any zone has substantially the same number of wobbling.

Abstract: An information recording medium having a spiral or concentric-shaped groove structure along a track formed on a disk-like substrate. The medium has the groove structure wobbled in a radius direction of the medium and the track is divided into a plurality of recording units in the track direction by at least one radial boundary line. At least two adjacent recording units in the radius direction of the medium comprise one zone, and the groove structure included in the respective recording units within one zone has at least one of substantially the same number of wobbling and the wobbling cycle.

Abstract: A method for recording information and information recording/reproducing apparatus wherein information of a plurality of sectors is recorded as one recording unit into an optical information recording medium, a recording area of which is constructed with a plurality of zones, each being different in a sector number per one round of track. Information is recorded per one recording unit into the optical information recording medium and a verify control is conducted after the recording of information, wherein a number of recording units for conducting the verify control for each of the zones is changed upon basis of a number of sectors per one round of track and a number of sectors for turning back by the one round of track.