Patent ID: 9484057
Filing Date: 2016-11-01
CPC Classification: G11B

Claim Text:
1. A hologram recording and reproducing apparatus for recording and reproducing data on and from a hologram disk medium comprising: a pickup which is attached to a fixed frame and irradiates the hologram disk medium with a laser beam to record and reproduce data on and from the hologram disk medium; a spindle motor for holding and rotating the hologram disk medium; and a disk conveyance unit for holding the spindle motor and conveying the hologram disk medium to a position where recording and reproducing are performed by the pickup; wherein the disk conveyance unit includes a first movement mechanism driven by a first conveyance motor for moving a first conveyance frame with respect to the fixed frame and a second movement mechanism for driven by a second conveyance motor for moving a second conveyance frame for holding the spindle motor with respect to the first conveyance frame, and the first and second movement mechanisms move substantially in the same direction and operate independently from each other, wherein switching driving conditions of the first and second conveyance motors makes the first movement mechanism different from the second movement mechanism in movement speed and movement pitch.