Abstract: An optical disk recording apparatus and method utilize a recording beam source, a spatial light modulator that modulates a recording radiation beam into an information beam carrying information and a reference beam, a focusing unit that focuses the information beam and the reference beam onto an information recording layer, an image sensing device that detects intensity distribution of the information beam, and a control unit. The control unit controls the spatial light modulator on the basis of the intensity distribution detected by the image sensing device. An optical disk recording apparatus, and a control method thereof, thereby has a high signal-to-noise ratio.

Abstract: An optical disk recording apparatus and method utilize a recording beam source, a spatial light modulator that modulates a recording radiation beam into an information beam carrying information and a reference beam, a focusing unit that focuses the information beam and the reference beam on an information recording layer, an image sensing device that detects the intensity distribution of the information beam, and a control unit. The control unit controls the spatial light modulator on the basis of the intensity distribution detected by the image sensing device. A recording/reproducing apparatus can check the amount of information capable of being recorded onto an optical disk, and an optical disk therefor.

Abstract: An optical disc recording and/or reproducing apparatus in which an opening is provided on a cabinet and a disc tray provided with a through portion is supported so as to be capable of reciprocating so that the opening can be opened and closed. The disc tray is provided with a shutter which is positioned to open at least a part of the through portion when the opening is in the closed state. The shutter is positioned to close at least a part of the opened through portion when the opening is changed from the closed state to the opened state. Accordingly, by such structure and methodology, increase in temperature of the components mounted on an optical pickup can be reduced.