Patent ID: 8014255

Claim:
A holographic recording apparatus comprising: 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; an 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 the reference light obtained by Fourier transform, to thereby generate an added signal, 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, wherein the adding section includes a spatial frequency filter that extracts the high-order component from the reference light subjected to Fourier transform.