Patent ID: 8072488

Claim:
A method of displaying a holographically generated video, said video comprising a plurality of video frames, the method comprising providing for each frame a respective sequential plurality of holograms to reconstruct the frame, and displaying to a human observer the holograms of each of the plural video frames on a diffractive display device for viewing the replay field thereof, wherein the noise fields of said holograms are independent and identically distributed (i.i.d.), and wherein said holograms are displayed quickly enough for the limited temporal bandwidth of the eye of said observer to impart an effect of noise variance attenuation due to averaging, whereby the noise variance of each frame is perceived by said human observer as attenuated by averaging across said plurality of holograms, wherein a process of providing said plurality of holograms comprises: receiving an input intensity image; forming n target intensity images each equal to an amplitude of said input intensity image, and each having i.i.d. uniformly-random phase; computing n full complex Fourier transform holograms respectively corresponding to said n target intensity images, a said Fourier transform hologram comprising a real part and an imaginary part; and quantizing said real and imaginary parts of each of said Fourier transform holograms to more than two phase levels to provide said plurality of holograms to reconstruct said frame, wherein said reconstructed frame lacks a conjugate image.