摘要:
A data recording/reproduction method for performing a data recording/reproduction process on a flexible optical disk by rotating the flexible optical disk while controlling an axial runout of the flexible optical disk with a stabilizing member that applies an aerodynamic force to the flexible optical disk, and irradiating an optical beam and focusing the optical beam to the flexible optical disk is disclosed that includes the steps of a) generating a first axial runout, b) generating a focus error signal forming an S-curve when the first axial runout is generated, c) determining a position of the optical beam according to the focus error signal, d) generating a second axial runout that is smaller than the first axial runout after step c), and e) conducting at least one of the data recording process and the data reproduction process after step d).
摘要:
An optical disc for recording/reproducing an information signal by irradiating a disc substrate (1) having an information signal section (1c) on one main surface with a laser beam from the information signal section (1c) side has a clamp reference face (3a) provided on a replica substrate (1a) for producing the optical disc on the same side where a information signal section (1c) is provided. The clamp reference face (3a) is flat, and the replica substrate (1a) is thicker in a clamp region (3) than in an information recorded area (4). An embossed replica substrate (1a) is used wherein the periphery of a center hole (1b) is thicker than the information recorded area (4).
摘要:
A holographic recording medium including: an anti-reflection layer; an first substrate; a holographic recording layer containing a binder forming compound, a photopolymerizable compound which has a functional group being capable of photopolymerization and a photopolymerization initiator which can initiate a polymerization reaction of the photopolymerizable compound; and a second substrate, in that order, wherein at least one of the first substrate and the second substrate is a plastic substrate having a light transmittance of more than 90% measured according to ASTM D1003 at a thickness of 3 mm.
摘要:
An optical information recording medium has inner and outer spacers (103,104) at least one of which is formed as an integral part of either one of the top and bottom substrates (101,102) for defining a cell (110) between the top and bottom substrates by bonding the top and bottom substrates through the spacers in which a recording material is infused and then cured so as thereby to form a specified thickness of a holographic recording layer.
摘要:
The invention relates to an optical storage medium comprising below an entrance face (EF) a higher recording stack (ST0) comprising a higher recording layer (L0) and at least a lower recording stack (ST1), said lower recording stack (ST1) being recorded or read back by a radiation beam (4) entering into the optical storage medium through the entrance face (EF) with a wavelength (λ), focused on said lower recording stack (ST1) and transmitted through the higher recording stack (ST0), a recording of the higher recording layer (L0) causing an optical thickness variation between recorded and unrecorded areas of said first recording layer (L0), which is included into the range [0.03λ, 0.125λ].
摘要:
An optical information recording medium has: a substrate; one, two or more information signal layers which is formed on the substrate; and a protective layer which is formed on the one, two or more information signal layers. The surface of the protective layer is a reading surface on which light for recording or playing back an information signal in the information signal layer is radiated, and, in the reading surface, a plurality of subwavelength structures is formed.
摘要:
The present invention relates to a storage element carrier (20) comprising a first part (21) with a storage element (30) and a second part (22) with an optical recording medium (10). The invention further relates to an optical recording medium (10) comprising a clamping area (1), a recording area (2) and an outer area (3) outside of the recording area (2). According to a first or second aspect of the invention a first elevated ring (4) or a first set of protrusions (4') respectively is located in the clamping area (1). According to a third aspect of the invention the thickness (T2) of the optical recording medium (10) in at least one part of the recording area (2) is smaller than the thickness (T1) of the optical recording medium (10) in the clamping area (1). According to a fourth aspect the thickness (T3) of the optical recording medium (10) in at least one part of the outer area (3) is greater than the thickness (T2) in the recording area (2).
摘要:
Die Erfindung bezieht sich auf Informationsträger in Form einer Disk zur Speicherung und Wiedergabe einer Audio- und Videoinformation sowie von anderen Informationsarten in digitaler Form. Der Informationsträger in Form einer Disk hat eine Mittenöffnung zu dessen Halterung in einer Ableseeinrichtung und ist mindestens mit einem Substrat mit einer ersten Seite S 1 und einer zweiten Seite S 2 sowie mindestens mit einer Informationsschicht zur Speicherung und/oder Aufzeichnung und/oder Ablesung einer Information durch einen Laserstrahl versehen. Dabei sind erfindungsgemäß im Zentralteil des Informationsträgers eine zwischen Durchmessern D 1 und D 2 gelegene Zone R 1 und eine zwischen Durchmessern D 2 und D 3 gelegene Zone R 2 vorgesehen, wobei D i den Durchmesser einer zur Mittenöffnung des Informationsträgers konzentrischen Kreislinie bedeutet, i = 1 ... 3 ist, wobei D 1 im wesentlichen 15 mm, D 2 im wesentlichen 25 mm und D 3 im wesentlichen 33 mm betragen. Für jede Zone R j , wo j = 1 ... 2 ist, ist H j , also der größte Abstand zwischen zwei gedachten parallelen Ebenen, von denen die erste Ebene an der Seite S 1 in der Zone R j gelegene Punkte des Substrates und von denen die zweite an der Seite S 2 in einer Zone zwischen den Durchmessern D 1 und D 3 gelegene Punkte des Substrates aufweist, festgelegt, wobei H i ≤ 2,2 mm, H 2 ≤ 1,5 mm und bei H 2 1 ≥ 1,05 mm sind und die Substratdicke mindestens im Bereich der Informationsschicht max. 0,8 mm ausmacht. Diese Ausbildung des Informationsträgers ermöglicht eine Speicherung und/oder Aufzeichnung und/oder Neuaufzeichnung bis auf 4,7 Gigabit bei Anwendung einer modernen Anlage mit einem Laserstrahl mit 635 bis 650 nm Länge und bis auf 15 Gigabit und darüber bei Anwendung einer aussichtsreichen Anlage mit einer Laserstrahl mit 405 bis 450 nm Länge und darunter. Hierbei kennzeichnet sich der Informationsträger auch durch eine bessere Fertigungsgerechtheit und eine viel geringere Anzahl von Fehlern bei der Wiedergabe im Vergleich zu aus dem Stand der Technik bekannten Informationsträgern.