| 摘要 |
PROBLEM TO BE SOLVED: To provide an imaging method capable of obtaining an image within diffraction limit of an optical system in the observation of a self-light emitter or an optical disk. SOLUTION: The sum of differences of respective half-split focus spot light quantities of respective light spots on the self-light emitter is optically detected at every constant interval or the return light of a recording mark of the optical disk is divided into two in the scanning direction of the optical disk and the difference is detected. That is, from an optical quantity distribution graph of focus spot light of one light spot on the self-light emitter or from an optical quantity distribution graph of an image of a recording mark of the optical disk, a graph having an abruptly changing singular point is determined within the diffraction limit of an objective lens. Therein, three values F, G, H are obtained at a constant interval from the graph and the value of (F-2G+H) is made to be the brightnesses of respective light spots of the self-light emitter or the brightnesses of respective recording mark images of the optical disk. COPYRIGHT: (C)2004,JPO&NCIPI
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