REFERENCE BEAM INCIDENCE ANGLE ADJUSTING DEVICE OF A HOLOGRAM DATA STORAGE SYSTEM

摘要

PURPOSE: A reference beam incidence angle adjusting device of a hologram data storage system is provided to improve a record density of a storage medium by finely dividing an angle of the reference beam reflected of the record medium by use of density difference of an inert gas. CONSTITUTION: The reference beam incidence angle adjusting device of a hologram data storage system comprises: a reflection part(110) for making a reference beam to be incidence on a record medium(6) at different incidence angles, wherein the reference beam is incident and splitted from a laser(1) with a reflection angle changed by an inert gas density; and a gas density changing part(120) for changing the gas density in order to change the reflection angle of the reference beam incident from the reflection part(110), whereby angular multiplexing is performed.