| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hologram recording device, a hologram reproducing regenerating device, a method for recording hologram and a method for regenerating hologram that can be recorded and regenerated while lengthening an exposure time as much as possible even when using two laser beams. <P>SOLUTION: The hologram recording and reproducing device does not oscillates the laser beam from a servo light source 131, and only the laser beam from a recording and reproducing light source 111 oscillates. Thus, even in a system using the two laser beams, a target track can be irradiated with a recording and reproducing laser beam by surely reading various signal patterns with a servo laser beam. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
