摘要:
The present invention relates to an optical pick, an optical drive device, and a light irradiation method capable of suppressing a generated amount of shift Δx of a spot position. The optical pickup irradiates an optical recording medium through a common objective lens which irradiates a first light for use in information recording in or information reproduction from a recording layer and a second light different from the first light, the optical recording medium includes a reference surface having a reflection film in which a position director is formed in a spiral form or the like form, and the recording layer which is provided in a layer position different from the reference surface and in which a mark corresponding to irradiation of light is formed and hence information is recorded. The optical pickup adjusts a focusing position of the first light having passed through the objective lens by changing collimation of the first light entering the objective lens, thereby suppressing the shift Δx of a spot position between the first light and the second light which occurs due to the eccentricity of the optical recording medium. A magnification of the second light is within a magnification range of the first light.
摘要:
The invention relates to a "jump gap" servo mode provided to position an optical tape medium relative to a pickup head so that tracking may be reestablished after gaps in the servo tracks which occur in the pre- and post-amble fields. These gaps arise periodically because of a seam in the drum used to emboss the servo track on the tape medium. Also disclosed herein are other aspects of optical tape technology, tape manufacturing, and tape usage including: configurations, formulations, markings, and structure of the optical tape; manufacturing methods, systems, and apparatus including curing processes, coating methods, embossing, drums, testing, tracking alignment stamper strip; pick up head adapted for the disclosed optical tape; and optical tape uses including optical storage media devices for multimedia applications.
摘要:
The present invention can record sub-data. An optical disk drive (20) controls a laser diode (51), which serves as a light source, according to recording main-data information (Da) based on main data, and thus forms a record mark (RM) along a virtual irradiation line (TL) in an optical disk (100). The optical disk drive (20) shifts a target depth in a focusing direction according to recording sub-data information (Db) based on sub-data, and thus forms the record mark (RM) with the center of the record mark deviated in the focusing direction from the irradiation line (TL).
摘要:
Described is an optical data storage system which comprises a multiple data surface medium (12) and optical head. The medium comprises a plurality of substrates (50,56,62,68) separated by a light transmissive medium. Data surfaces are located on the substrate surfaces which lie adjacent a light transmissive medium. The data surfaces are substantially light transmissive. At least one of the data surfaces includes information identifying the type of tracking marks contained in at least one data surface.
摘要:
Provided are a method and apparatus for recording and/or reproducing data into and/or from an optical disk (10). The apparatus includes a reference beam optical system (20) to form a focus of a reference beam (Lb1) in an optical data storage layer (13) of the optical disk (10) and including an objective lens (100); a signal beam optical system (50) to form a focus of a signal beam (Lb2) in the optical data storage layer (13) and also including the objective lens (100); and a servo optical system (70) to project a servo beam (Lr1) onto the optical disk (10), receiving a reflection servo beam (Lr2) which is reflected on the optical disk (10), and performing focusing and tracking control on the objective lens (100). The reference beam optical system (20) includes a first focus mover (32) to move the focus of the reference beam (Lb1), and the signal beam optical system (50) includes a second focus mover (58) to move the focus of the signal beam (Lb2). The data is recorded into a plurality of recording layers in the optical data storage layer (13) by moving a first focus position (Fb), at which the foci of the reference beam (Lb1) and the signal beam (Lb2) are located, in a thickness direction of the optical data storage layer (13), which is a focusing direction.
摘要:
In an information recording medium comprising at least a substrate, a recording layer, and a resin layer, the substrate is formed with at least a pit corresponding to a read only area (31) and a groove corresponding to a recording/reproducing area (32) without overlapping with each other. A reflectivity of the recording layer is specified to be more than 10 %. The recording layer and the resin layer are continuously adhered over both the read only and recording/reproducing areas (31 and 32). The information recording medium is characterized in that both push-pull signal outputs T1 and T2, which are reproduced from the read only area (31) and the recording/reproducing area (32) respectively, are more than 0.1 and satisfy an inequality 1.5 ≧ T1/T2 ≧ 0.5.