Holographic information recording and reproducing apparatus for the same

A holographic information reproducing apparatus, comprising a laser source, a light detector, an optical fiber, a stationary carrier, and a precision rotator;

• the optical fiber guiding the laser source, which is a coherent light, to form a divergent beam at an output end of the optical fiber;
• the divergent beam being directly incident on a recording medium to serve as a reading beam;
• the stationary carrier being located at a center of the precision rotator to work independently without being affected by the precision rotator;
• and the output end of the optical fiber being fixedly connected to an outer edge of the precision rotator;
• whereby when the precision rotator is turned, a central incident angle of the reading beam incident on the recording medium is changed.

A holographic information recording and reproducing apparatus, comprising a laser source, a spatial light modulator, a light detector, an optical fiber, a stationary carrier, and a precision rotator;

• the optical fiber guiding the laser source, which is a coherent light, to form a divergent beam at an output end of the optical fiber;
• the divergent beam being directly incident on a recording medium to serve as a reference beam for holographic recording or a reading beam for holographic reproducing;
• the stationary carrier being located at a center of the precision rotator to work independently without being affected by the precision rotator;
• and the output end of the optical fiber being fixedly connected to an outer edge of the precision rotor;
• whereby when the precision rotor is turned, a central incident angle of the reference beam or the reading beam incident on the recording medium is changed.