HOLOGRAPHIC STORAGE SYSTEM FOR READING A HOLOGRAM STORED ON A HOLOGRAPHIC STORAGE MEDIUM AND A METHOD CARRIED OUT THEREWIH

摘要

storage medium holding means arranged along an optical path of a reference beam (3); a spatial light modulator (SLM) (4) arranged along said optical path for encoding a reference beam (3) with a code pattern (15); a detector (5) for detecting an image of the reconstructed hologram (7); and a servo control unit (14) for determining a misalignment of said reference beam (3) and said storage medium (6) from the detected image and for acting upon said SLM (4) to shift said code pattern (15). The invention further relates to a method of reading a hologram (7) stored on a holographic storage medium (6) comprising the steps of