摘要:
The invention provides an optical recording disk, with which the worsening of jitter can be prevented effectively even when fingerprints become adhered onto a laser light incidence surface. An optical recording disk 10 comprises a substrate 2, a recording layer 5, formed on the substrate, a light transmitting layer 7, formed on the recording layer, and a hard coat layer 8, formed on the light transmitting layer, and is characterized in that, when an operation of adhering an artificial fingerprint solution onto the optical recording disk's light incidence surface, onto which laser light is made incident, is performed and then an operation of wiping off the artificial fingerprint solution that has been adhered onto the light incidence surface is repeated five times, jitter becomes no more than 1.15 times that prior to the adhesion of the artificial fingerprint solution.
摘要:
The invention provides an optical recording disk, with which the worsening of jitter can be prevented effectively even when fingerprints become adhered onto a laser light incidence surface. An optical recording disk 10 comprises a substrate 2, a recording layer 5, formed on the substrate, a light transmitting layer 7, formed on the recording layer, and a hard coat layer 8, formed on the light transmitting layer, and is characterized in that, when an operation of adhering an artificial fingerprint solution onto the optical recording disk's light incidence surface, onto which laser light is made incident, is performed and then an operation of wiping off the artificial fingerprint solution that has been adhered onto the light incidence surface is repeated five times, jitter becomes no more than 1.15 times that prior to the adhesion of the artificial fingerprint solution.
摘要:
A multi-layer information medium which is less likely to be deflected and twisted is provided. Such medium is also provided at low cost. The optical information medium comprises a substrate or a pair of substrates, and at least two information-storing layers for storing recorded information and/or tracking servo information disposed on said substrate or between said pair of substrates, and at least one information-storing layer is recorded or read by the recording beam or the reading beam which has passed through other information-storing layer(s). In this medium, the medium has at least one cured intermediate layer comprising an active energy radiation-curable resin, and at least one of said cured intermediate layer(s) has a tensile elongation at break of 15 to 200% and a tensile modulus of 20 to 1,000 MPa.
摘要:
An optical information medium is provided. The medium comprises a supporting substrate, an information recording layer thereon, and a light-transmitting layer thereon and a recording or reading laser beam enters the recording layer through the light-transmitting layer, and in such medium, recording/reading characteristics are improved when the beam spot of a laser beam has a small diameter and the linear velocity is high with the function of the light-transmitting layer to protect the information recording layer maintained at a sufficient level. Also provided is a medium wherein storage stability is improved. In the optical information medium comprising a supporting substrate, an information recording layer thereon, and a light-transmitting layer on the information recording layer wherein a recording or reading laser beam enters the information recording layer through the light-transmitting layer, the light-transmitting includes at least one resin layer, and has a tensile yield stress of 20 to 100 MPa and tensile strain at yield of 0.1 to 15%.
摘要:
An optical information medium comprising a supporting substrate, an information recording area on the supporting substrate, and a light-transmitting layer covering at least the information recording area, wherein the information recording area is irradiated with the recording/reading laser beam through the light-transmitting layer, and wherein the light-transmitting layer is highly scratch resistant upon contact with the optical pickup is provided. Also provided is an optical information medium which has a scratch-resistant light transmitting layer, and which experiences reduced vibration in high-speed rotation without suffering from problems in focus servo and tracking servo. In such optical information medium, the surface of the medium on the side of the laser beam incidence at least in the part above the information recording area has a dynamic coefficient of friction of up to 0.4.
摘要:
A method of manufacturing a multiplayer optical recording medium by depositing two recording layers, with a spacer layer sandwiched therebetween, on a substrate. The method includes using a rubber chuck which can undergo elastic deformation at least in radial directions to close a central mounting hole of the substrate to thereby fix the substrate having the recording layer formed thereon on a turntable. After a coating liquid for forming the spacer layer is dropped in the vicinity of a boundary portion between a peripheral surface of the rubber chuck and the substrate, the rubber chuck is caused to chuck a stamper for forming the first recording layer thereon while allowing the stamper to be placed over the substrate. Thereafter, the turntable is rotated to spin-coat the coating liquid. This makes it possible to form a spacer layer having a uniform layer thickness while preventing intrusion of air bubbles, without leading to high manufacturing costs.
摘要:
An optical information medium is provided which has a light-transmitting substrate which exhibits excellent light transmittance when a laser beam of blue/violet region or ultraviolet region is used as the recording and/or reading beam; whose light transmittance is not substantially affected by the variation or fluctuation of the oscillation wavelength of the laser beam source; which has a long-term weatherability; and which exhibits sufficient protective effects against exterior impacts. The optical information medium includes an information recording layer and a light-transmitting substrate, and the medium is used such that the recording and/or reading laser beam reaches the information-recording layer through the light-transmitting substrate. The light-transmitting substrate has a light transmittance T and difference &Dgr;T between the maximum value and the minimum value of the light transmittance T in arbitrary wavelength range of 10 nm which satisfies the relations: T≧0.8 and &Dgr;T≦0.10 at least in the wavelength region of 250 to 450 nm.
摘要:
In the multi-layer information medium having a plurality of information-storing layers according to the present invention, distance between the adjacent information-storing layers is reduced with no increase in cross talk between these layers. The optical information medium has at least two information-storing layers each storing recorded information and/or servo information, and at least one of the information-storing layers is recorded or read by the recording beam or the reading beam which has passed through other information-storing layer(s). The medium has a filter layer between the adjacent information-storing layers, and in the spectral absorption characteristics in the wavelength range of 300 to 1000 nm of this filter layer, a wavelength range exhibiting an absorption of 80% or higher and a wavelength range exhibiting an absorption of 20% or lower are present.
摘要:
The present invention provides a method of manufacturing an optical recording medium having two recording layers on a supporting substrate and an optical recording medium obtained according to the method. A method of manufacturing an optical recording medium including the steps of: (A) providing a radiation-curable resin layer backed with a lining sheet 12 on a stamper 11 for the formation of information pits and/or grooves for the first recording layer, irradiating the resin layer with radiation to cure the resin layer, and removing the stamper 11, thereby to form the light transmitting layer 6 supported by the lining sheet 12; (B) forming the first recording layer 5 on the light transmitting layer 6; (C) forming the second recording layer 3 on the supporting substrate 2 with information pits and/or grooves for the second recording layer formed; (D) laminating the lining sheet 12 and the supporting substrate 2 via the space layer 4 so that the first recording layer 5 and the second recording layer 3 are located inside; and (E) removing the lining sheet 12.
摘要:
The car power source apparatus is provided with a battery case housing a plurality of rechargeable batteries in a battery compartment, and air ducts to carry ventilating air to the battery case and cool the batteries. A plurality of air inlet and outlet openings are provided through panels between the battery compartment and the air ducts. Air inlet and outlet openings are opened in a direction different from the direction of airflow in the ducts. Further, the power source apparatus has a plurality of airflow channels of differing length established inside an air duct in the direction of airflow. This divides ventilating airflow in the air duct into a plurality of airflow channels.