Patent ID: 7848204
Filing Date: 2010-12-07
Classification: G03H,G11B

Abstract:
1. A holographic storage and regeneration system having servo mechanism, comprising: a holographic recording medium; a light source, used to generate a light beam that is split into a signal light and a reference light; a spatial light modulator, located on an optical path of said signal light, thus said signal light incident upon said spatial light modulator is modulated by it, and said signal light will then be incident upon said holographic recording medium along an incident direction of said signal light; a conjugate servo light guidance portion, used to guide said reference light to be incident upon said holographic recording medium along a specific direction, and thereby reflected by it to proceed in another direction, in this process, said reference light and said signal light interfere with each other, thus producing a holographic interference fringe in said holographic recording medium, and then the reflected reference light is guided into a first image sensor through said conjugate servo light guidance portion, and is utilized to adjust the incident angle of said reference light; a first light guidance portion, wherein said first light guidance portion further includes a light splitter, so that said light beam emitted from said light source is split into said reference light and said signal light both in a first linearly polarized state or a second linearly polarized state, and said first linearly polarized state is perpendicular to said second linearly polarized state; and a second light guidance portion, used to guide said signal light to be incident onto said spatial light modulator, and then said signal light will be incident upon said holographic recording medium along an incident direction of said signal light, further includes: