HOLOGRAPHIC STORAGE SYSTEM WITH REDUCED NOISE

摘要

The present invention relates to an apparatus (1) and a method for reading from holographic storage media (13), and more specifically to an apparatus (1) and a method for reading from holographic storage media (13) with reduced noise. According to the invention, a light source (2) is provided for generating at least a reference beam (5), an objective lens (12) for focusing the reference beam (5) into the holographic storage medium in order to generate a reconstructed object beam (14), and a beam splitter (21) for generating a local oscillator beam (20) for homodyne detection of the reconstructed object beam (14). One or more optical elements (12, 15) within the optical path of the reference beam (5) or the reconstructed object beam are mounted on at least one mechanical modulator (32), which oscillates with an oscillation frequency.