Patent ID: 7724414
Filing Date: 2010-05-25
Classification: G02F,G03H,G11B

Abstract:
1. A spatial light modulator, applied to a collinear volume holographic storage system, comprising an amplitude modulator and a phase modulator with a hollow, wherein said phase modulator is set corresponding to said amplitude modulator, and said phase modulator modulates a surrounding portion of an incident light to a reference light and said amplitude modulator modulates the center portion of said incident light to a signal light, and a selective blocking member upstream of said amplitude modulator and said phase modulator, wherein said selective blocking member is configured to block the center portion of the incident light from passing said amplitude modulator and said phase modulator but not the surrounding portion of the incident light in a read configuration, and not to block the center portion of said amplitude modulator and said phase modulator in a write configuration.