Method for reading and writing with holographic system and holographic storage system

A holographic storage system, comprising:

• a spatial modulating device configured to modulate a plurality of lights;
• an optical recording medium configured to store an interference result;
• an image receiving device configured to receive an interference signal for reconstructing an image;
• a state controller configured to control, in a writing state, a spatial relationship between the plurality of lights and the optical recording medium, and configured to generate, in a reading state, a reading and writing phase offset;
• a first lens disposed between the spatial modulating device and the optical recording medium, and configured to transfer the plurality of lights;
• and
• a second lens disposed between the spatial modulating device and the image receiving device, and configured to transfer the plurality of lights,
• wherein the state controller controls a spatial relationship between a reference light and the optical recording medium, the spatial modulating device provides a signal light, the reference light and the signal light are transferred through the first lens to the optical recording medium for recording an interference grating, the state controller and the spatial modulating device change the reference light and the signal light, and repeatedly record M interference gratings in the optical recording medium, and
• in the reading state, the state controller controls a spatial relationship between a reading light and the optical recording medium, and reads M interference gratings at the same time for generating the interference result, the state controller changes the reading light for obtaining N interference results, an interference result of diffraction signals of the M interference gratings interfering to each other is transferred through the second lens to the image receiving device.