Light interference module and holographic storage apparatus

A holographic storage apparatus, comprising:

• a holographic light-emitting module configured to provide a signal light beam and a reference light beam;
• a spatial light modulator (SLM) configured to modulate the signal light beam and the reference light beam provided by the holographic light-emitting module;
• and
• a light interference module, comprising:
• an object lens configured to receive signal light beam and project the signal light beam to an optical storage media;
• a first light-guiding element configured to receive the reference light beam and project the reference light beam to the optical storage media, wherein the signal light beam and the reference light beam projected by the first light-guiding element produce a first interference pattern on the optical storage media;
• and
• a second light-guiding element configured to receive the reference light beam and project the reference light beam to the optical storage media, wherein the signal light beam and the reference light beam projected by the second light-guiding element produce a second interference pattern on the optical storage media, wherein the signal light beam is surrounded by the reference light beam, and the first light-guiding element and the second light-guiding element are disposed to surround the object lens.

A light interference module, comprising:

• an object lens configured to project a signal light beam to an optical storage media;
• a plurality of light-guiding elements disposed to surround the object lens;
• and
• a plurality of lens respectively disposed a light outlet of each of the light-guiding elements, wherein the light-guiding elements project a plurality of reference light beams to the optical storage media along different directions via the lens, and the reference light beams and the signal light beam produce different interference patterns on the optical storage media.