| 摘要 |
It is an object of the invention to record and reproduce information successfully even when light having small energy is used for hologram. A drive means to move a collimator lens according to movement of a recording medium is provided, and an angle of light for recording which enters from the collimator lens to a polarizing beam splitter is changed. In result, a position of light which enters the recording medium is shifted, and therefore, information can be recorded in a normal position of the recording medium, and information can be reproduced from the normal position on the recording medium according to movement of the recording medium.
|
