We propose a newly developed roll-type optical memory (RoCAM). This memory is a multilayered memory and has a cylindrical shape. It consists of a recording and transparent layers wound onto a shaft. A RoCAM has five advantages. First, the media is easily fabricated. Second, the groove structures in RoCAM are easily implemented. Third, it has parallel recording and reading. Fourth, there is stable rotation and, finally, constant linear velocity. We report these advantageous features and the one-dimensional parallel signal readout of RoCAM.
