Patent ID: 7859970

Claim:
A holographic storage and reproduction system with a servo, comprising: a holographic recording medium; a light source, for generating a signal light and a reference light, wherein the reference light is incident to the holographic recording medium along a first incidence direction; a spatial light modulator (SLM), located in the signal light path, such that the signal light is incident to the holographic recording medium along a second incidence direction after the signal light is incident to the SLM, and is made to interfere with the reference light, thereby generating a holographic interferogram in the holographic recording medium; wherein, when the reference light is incident to the holographic interferogram along the first incidence direction again, a reproduced light is generated and incident to an image sensor along the signal light path; a servo light guiding portion, for guiding the reference light to a sensing portion after being reflected by the holographic recording medium for analyzing and adjusting the relative distance and oblique angle between the storage and reproduction system and the holographic recording medium; and a servo light source, for generating a servo light, wherein the servo light is incident to a servo track of the holographic recording medium through the servo light guiding portion, reflected by the servo track, and received by the sensing portion, such that the reference light is adjusted to be incident to the holographic recording medium along the first incidence direction, and the holographic interferogram is continuously recorded in the holographic recording medium along the servo track.