| 摘要 |
A holographic information recording and reproducing apparatus, comprising a light source; a beam splitter for splitting a beam emitted from the light source into a first beam and a second beam; a spatial light modulator for providing the first beam with information; a first mirror for causing the second beam to be incident on a transmission type information recording medium; a second mirror for causing the second beam that has passed through the information recording medium to be incident on the information recording medium again; a photodetector for detecting the second beam which is caused to be incident on the information recording medium again and exits from the information recording medium toward the first mirror; and a controller for controlling an angle of the second mirror based on a detection result of the photodetector.
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