Hologram reproducing method, optical phase intensity conversion method, decoding method of encryption phase-modulated signal, a hologram recording and reproducing apparatus, and an optical phase-intensity converter

摘要

And it generates a phase distribution signal by performing a phase modulation using the SLM (11) to light emitted from the laser light source (10). It said phase distribution signal, and by focusing on the hologram recording medium through an objective lens (12) (13), and records the phase distributed signals to a hologram recording medium (13). Playback, using the same optical system irradiates the reproduction reading light to the holographic recording medium (13), to read the light intensity signal generated by the image pickup element (15).