INFORMATION REPRODUCING DEVICE AND METHOD OF CONTROLLING SAME

摘要

Provided is an information reproducing device for reproducing an information recording medium in which an interference fringe of reference light and information light is formed.  The information reproducing device comprises an information acquisition unit which emits the reference light, converts the reference light into a luminance signal by using a first photodetector, and outputs the luminance signal, an error detection unit which extracts the feature extraction amount from the luminance signal and detects at least one of a first error in the irradiation angle of the reference light and a second error in at least one of the wavelength of the reference light and the temperature in reproduction of the information recording medium, and a control unit which controls at least one of the irradiation angle of the reference light relative to the information recording medium and at least one of the wavelength of the reference light and the temperature in reproduction, wherein the first error is used when the relative irradiation angle is controlled and the second error is used when at least one of the wavelength and the temperature in reproduction is controlled.