Abstract:
According to one embodiment, an information storage medium in which layer 0 and layer 1 are arranged from a read surface, a system lead-in area, data lead-in area, data area, and middle area are arranged from an inner circumference of the layer 0, and a system lead-out area, data lead-out area, data area, and middle area are arranged from an inner circumference of the layer 1. A guard track zone is arranged on a side of the data area in the data lead-out area, and a reference code zone, R physical format information zone, recording management zone, and drive test zone are arranged in the data lead-in area of the layer 0 and padding of the guard track zone of the data lead-out area is performed after padding of the drive test zone of data lead-in area and recording of the recording management zone.
Abstract:
An information layer 0 comprises a system lead-in area, data lead-in area, data area, and middle area, an information layer 1 comprises a system lead-out area, data lead-out area, data area, and middle area, an end position of the data area of layer 1 is positioned outer than a start position of the data area of layer 0, the data lead-in area comprises a guard track zone wider than a test zone in the data lead-out area, the data lead-out area comprises a guard track zone wider than a test zone and a management zone in the data lead-in area, the middle area of layer 0 comprises a guard track zone wider than a test zone in the middle area of layer 1, and the middle area of layer 1 comprises a blank zone wider than a test zone in the middle area of layer 0.
Abstract:
This invention achieves high-density recording while preventing recording units from overlapping. Recording is done to form a gap between predetermined recording units. Since this gap is formed, even when a rotation driving mechanism of a medium suffers rotation nonuniformity, two neighboring recording units never overlap each other, and destruction of recording data can be prevented.
Abstract:
This invention achieves high-density recording while preventing recording units from overlapping. Recording is done to form a gap between predetermined recording units. Since this gap is formed, even when a rotation driving mechanism of a medium suffers rotation nonuniformity, two neighboring recording units never overlap each other, and destruction of recording data can be prevented.
Abstract:
A two-layer recording type optical disk capable of realizing stable recording and reproduction without being affected by another recording layer and an optical disk apparatus for the two-layer recording type optical disk are provided. In layouts of various areas in the optical disk, a position where a border between a recorded part and an unrecorded part is formed on one recording layer is set so that the position is always separated from a position where a border between a recorded part and an unrecorded part is formed on another recording layer by a predetermined clearance amount. Moreover, to a recording layer farther from an incident surface, test recording or data recording is always performed through a recorded part on a closer recording layer.
Abstract:
According to one embodiment, a single-sided multilayered information recording medium having recording layers, wherein an emboss management zone, an inner recordable management zone, a data area, and an outer recordable management zone are sequentially arranged from an inner side of each of the recording layers, and a burst-cutting area is arranged inward of the emboss management zone in any one of the recording layers.
Abstract:
An embodiment of the invention is useful for providing an optical pickup unit, which condenses light with different wavelengths at different positions and focal distances, and exactly detects a focus error signal when receiving the reflected light with different wavelengths from two or more kinds of recording medium, in the state that the focal distance of a condensing means is the same as the distance from the recording surface of a recording medium to the condensing means, by dividing light with different wavelengths emitted from light sources and reflected by a recording medium into a predetermined number by a diffraction element, and condensing at a position of a predetermined distance in a predetermined direction.
Abstract:
Header regions are formed by dividing a groove or grooves. Each of the header regions is provided with two ID sections G-ID1, G-ID2 storing address information and a track center detection mark section, arranged between the two ID sections, so as to be used for detecting the track center.
Abstract:
An optical disc apparatus of the present invention in its broader aspects is configured to have a predetermined range of A/M2, which is determined by an area A of a light-receiving surface of a photodetector to receive a reflected laser beam reflected on first and second recording layers of an optical disc, and a lateral magnification M (ratio of a condenser lens focal length fc to an objective lens focal length fo) of a light-receiving system to pass a reflected laser beam.
Abstract translation:本发明的光盘装置在其更广泛的方面被配置为具有由接收光电检测器的光接收表面的面积A确定的A / M 2的预定范围 在光盘的第一和第二记录层上反射的反射激光束,以及光接收系统的横向放大率M(聚光透镜焦距fc与物镜焦距fo的比率),以使反射激光束 。
Abstract:
An information recording medium has a recording track, a plurality of address areas which are formed on the recording track and record address information, and mark areas, the number of which is larger than the number of address areas, and which are formed at predetermined intervals and include mark information. Each address area records address information by means of pits, and each mark area records mark information by means of wobbles as a part of a track boundary.