Optical information recording apparatus and method
First Claim
1. An optical information recording apparatus for recording information on a recording medium by irradiating the recording medium with recording light, the recording medium includes an information recording layer in which information is recorded using holography and a servo layer in which servo information is formed, the optical information recording apparatus comprising:
- a recording laser for emitting recording laser light used to generate the recording light;
a servo laser for emitting servo laser light with a wavelength which differs from a wavelength of the recording laser light, the servo laser being used for performing servo to determine a position of the recording light on the recording medium; and
recording means for recording information on the recording medium by generating the recording light using the recording laser light and irradiating the information recording layer of the recording medium with the recording light, and for performing servo by irradiating the servo layer with the servo laser light, wherein the recording means comprises;
an information light generating means for generating information light carrying information by spatially modulating the recording laser light, recording reference light generating means for generating recording reference light using the recording laser light, and a recording optical system for coaxially irradiating the recording medium with the information light and the recording reference light, the information being recorded on the recording medium by interference patterns that are generated by interference between the information light and the recording reference light.
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Accused Products
Abstract
Recording of information by utilizing a holography to each information recording area while moving a record medium having information recording areas by means of a practical light source. For recording of information on an information recording area (7) of a record medium, an irradiated position (101) is moved so that the irradiated position (101) with information light and recording reference light may follow on information recording area (7) which moves for a predetermined period. Thus, one information recording area (7) keeps on being irradiated with information light and recording reference light, so that information is recorded on this information recording area (7) in interference patterns due to the interference of the information light with the recording reference light.
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Citations
13 Claims
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1. An optical information recording apparatus for recording information on a recording medium by irradiating the recording medium with recording light, the recording medium includes an information recording layer in which information is recorded using holography and a servo layer in which servo information is formed, the optical information recording apparatus comprising:
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a recording laser for emitting recording laser light used to generate the recording light;
a servo laser for emitting servo laser light with a wavelength which differs from a wavelength of the recording laser light, the servo laser being used for performing servo to determine a position of the recording light on the recording medium; and
recording means for recording information on the recording medium by generating the recording light using the recording laser light and irradiating the information recording layer of the recording medium with the recording light, and for performing servo by irradiating the servo layer with the servo laser light, wherein the recording means comprises;
an information light generating means for generating information light carrying information by spatially modulating the recording laser light, recording reference light generating means for generating recording reference light using the recording laser light, and a recording optical system for coaxially irradiating the recording medium with the information light and the recording reference light, the information being recorded on the recording medium by interference patterns that are generated by interference between the information light and the recording reference light. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An optical information reproducing apparatus for reproducing information from a recording medium by irradiating the recording medium with reproducing light, the recording medium including an information recording layer in which information is recorded using recording light by holography, and a servo layer in which servo information is formed, the optical information reproducing apparatus comprising:
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a reproducing laser for emitting reproducing laser light used to generate reproducing light, the reproducing laser light having a same wavelength as a recording laser light used to generate the recording light;
a servo laser for emitting servo laser light with a wavelength which differs from a wavelength of the reproducing laser light, the servo laser being used for performing servo to determine a position of the reproducing light on the recording medium; and
reproducing means for reproducing information from the recording medium by generating the reproducing light using the reproducing laser light and irradiating the information recording layer of the recording medium with the reproducing light, and for performing servo by irradiating the servo layer on the recording medium with the servo laser light. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification