Optical information processing apparatus and method of processing optical information
First Claim
1. An optical information processing apparatus comprising:
- an optical head for irradiating an optical information recording medium with light, converting the light into a head signal after the light is reflected by the optical information recording medium, and outputting the head signal, a signal quality index detector for detecting a signal quality index representing quality of the head signal on the basis of the head signal outputted from the optical head, and a two-dimensional probe for varying a focal position and a spherical aberration of the light radiated onto the optical information recording medium so as to search for a focal position and a spherical aberration that optimize the signal quality index detected by the signal quality index detector.
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Abstract
An optical information processing apparatus includes: an optical head for irradiating an optical information recording medium with light, converting the light reflected by the optical information recording medium into a head signal and outputting the head signal; a signal quality index detector for detecting a signal quality index representing quality of the head signal on the basis of the head signal; and a two-dimensional probe for varying the focal position and the spherical aberration of the light radiated onto the optical information recording medium so as to search for a focal position and a spherical aberration that optimize the signal quality index detected by the signal quality index detector.
46 Citations
30 Claims
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1. An optical information processing apparatus comprising:
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an optical head for irradiating an optical information recording medium with light, converting the light into a head signal after the light is reflected by the optical information recording medium, and outputting the head signal, a signal quality index detector for detecting a signal quality index representing quality of the head signal on the basis of the head signal outputted from the optical head, and a two-dimensional probe for varying a focal position and a spherical aberration of the light radiated onto the optical information recording medium so as to search for a focal position and a spherical aberration that optimize the signal quality index detected by the signal quality index detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of processing optical information, comprising:
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an optical head signal output comprising irradiating an optical information recording medium with light, converting the light into a head signal after the light is reflected by the optical information recording medium, and outputting the head signal, a signal quality index detection comprising detecting a signal quality index representing quality of the head signal on the basis of the head signal outputted from the optical head, and a two-dimensional search comprising varying the focal position and the spherical aberration of the light radiated onto the optical information recording medium so as to search for a focal position and a spherical aberration that optimize the signal quality index detected by the signal quality index detector. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification