Invention Grant
US08014255B2 Holographic recording apparatus, holographic reproducing apparatus, holographic recording method and holographic reproducing method 有权
全息记录装置,全息再现装置,全息记录方法和全息再现方法

Holographic recording apparatus, holographic reproducing apparatus, holographic recording method and holographic reproducing method
Abstract:
A holographic recording apparatus is provided and includes: a signal light generation section that generates signal light modulated according to digital data; a reference light generation section that generates reference light modulated by means of a pixel pitch; a adding section that adds, in proximity to a light-convergence position where the signal light and the reference light come close to each other or overlap each other, a low-order component of the signal light obtained by Fourier transform and a high-order component of the reference light obtained by Fourier transform, the high-order component of the reference light having a spatial frequency region differing from that of the low-order component of the signal light; and an illumination optical system that irradiate an optical recording medium with the added signal and reference light.
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