OPTICAL INFORMATION RECORDING DEVICE, OPTICAL INFORMATION REPRODUCTION DEVICE, OPTICAL INFORMATION RECORDING METHOD, AND OPTICAL INFORMATION REPRODUCTION METHOD

摘要

When a short stack is used there is a problem in that it is difficult to increase the recording transmission speed and the reproduction transmission speed. This problem is solved by means of this optical information recording device, which records an interference pattern of a signal light and a reference light as a hologram on an optical information recording medium, and is equipped with: a light source unit that emits light; a branching element that branches the light emitted from the light source unit into a signal light and a reference light; a spatial light modulator for adding two-dimensional information to the signal light; and a signal light angle-changing element capable of changing the angle of the signal light. When recording is performed the signal light angle-changing element changes the angle of the signal light, thereby changing the position of the signal light on the optical information recording medium.