摘要:
A holographic recording medium including a recording layer on a substrate, which records data information in a light interference pattern. In the holographic recording medium, information on a thermal expansion characteristic of a recording material contained in the recording layer and/or information on temperature dependency of the refractive index of the recording material are recorded within the holographic recording medium in advance.
摘要:
A holographic recording medium includes a recording layer on a substrate, which records data information in a light interference pattern. Information on a thermal expansion characteristic of a recording material contained in the recording layer and/or information on temperature dependency of the refractive index of the recording material are recorded within the holographic recording medium in advance.
摘要:
A holographic recording medium including a recording layer on a substrate, which records data information in a light interference pattern is provided. In the holographic recording medium, information on a thermal expansion characteristic of a recording material contained in the recording layer and/or information on temperature dependency of the refractive index of the recording material are recorded within the holographic recording medium in advance.
摘要:
A holographic recording medium including a recording layer on a substrate, which records data information in a light interference pattern is provided. In the holographic recording medium, information on a thermal expansion characteristic of a recording material contained in the recording layer and/or information on temperature dependency of the refractive index of the recording material are recorded within the holographic recording medium in advance.
摘要:
A holographic recording medium including a recording layer on a substrate, which records data information in a light interference pattern is provided. In the holographic recording medium, information on a thermal expansion characteristic of a recording material contained in the recording layer and/or information on temperature dependency of the refractive index of the recording material are recorded within the holographic recording medium in advance.
摘要:
A holographic recording medium including a recording layer on a substrate, which records data information in a light interference pattern is provided. In the holographic recording medium, information on a thermal expansion characteristic of a recording material contained in the recording layer and/or information on temperature dependency of the refractive index of the recording material are recorded within the holographic recording medium in advance.
摘要:
An optical information recording medium contains a recording layer that includes: a recording area on which a cavity is formed as a recording mark as a result of an increase in temperature around a focal point after absorbing a recording beam converged for recording of information in accordance with the wavelength of the recording beam and from which, when a predetermined reading beam is emitted for reproducing of the information, the information is reproduced based on the optically modulated reading beam; and a non-recording area provided adjacent to the recording area to prevent the heat around the focal point from dispersing.
摘要:
Preventing a molded disc substrate from generating a separation pattern. To this end, a molding die 1 includes a pair of stationary die 6 and movable die 7, and an outer circumference ring 16 for molding an outer circumference end of the disc substrate 2. The outer circumference ring 16 is so mounted as to be movable along forward and backward directions in parallel with a moving direction of the movable die 7 toward the stationary die 6, and has a retaining surface 39 for retaining the outer circumference of the molded disc substrate 2.
摘要:
An optical information recording medium, which includes both of a land surface and a groove surface as a recording track and presents high signal quality. The optical information recording medium includes both a land and a groove as the recording track on a substrate, in which a laser light is irradiated from a reverse side of the substrate to thereby carry out a recording and a reproduction, and an inclination angle of a groove side is 25° or more and 40° or less, and both of arithmetic average roughness (Ra) on the land surface and the groove surface are assumed to be 0.2 to 0.7 nm.
摘要:
An optical disc has a base formed by resin, and a reflection layer formed on the base. On the base, servo areas where servo pits P1, P2 for providing servo information for sample servo system are formed at predetermined angular positions of respective tracks on the base. Further, data areas where data pits Pd for providing data information accessed by the optical disc drive operative on the basis of the servo pits P1, P2 are formed between the respective servo areas. In addition, in the servo area and the data area which are adjacent to each other, between servo pit P2 disposed at the position closest to the data area and data pit Pd disposed at the position closest to the servo area, anchor pit Pan neglected in the optical disc drive is provided.