Holographic display system and method for reducing effects of quantisation noise

A method of displaying a holographic image, the method comprising:

• determining a target light field, H, for quantisation, the target light field having a Fourier transform, F(H), such that it does not overlap (i) a Fourier transform of its complex conjugate, F(H*), (ii) a Fourier transform of the target light field multiplied by the complex conjugate of the target light field, F(HH*), (iii) a Fourier transform of a square of the target light field, F(H2), and (iv) a Fourier transform of a square of the complex conjugate of the light field F(H*2);
• and
• displaying a quantised version of the target light field through a filter delimiting an aperture corresponding to an extent of F(H) in a Fourier plane such that components corresponding to F(H*), F(HH*), F(H2), and F(H*2) resulting from quantisation are substantially blocked by the filter.

A non-transitory computer-readable medium comprising instructions, that, when executed by a processor of a holographic display system, cause the holographic display system to display a holographic image by:

• determining a target light field, H, for quantisation, the target light field having a Fourier transform, F(H), such that it does not overlap (i) a Fourier transform of its complex conjugate, F(H*), (ii) a Fourier transform of the target light field multiplied by the complex conjugate of the target light field, F(HH*), (iii) a Fourier transform of a square of the target light field, F(H2), and (iv) a Fourier transform of a square of the complex conjugate of the light field F(H*2);
• and
• displaying a quantised version of the target light field through a filter delimiting an aperture corresponding to an extent of F(H) in a Fourier plane such that components corresponding to F(H*), F(HH*), F(H2), and F(H*2) resulting from quantisation are substantially blocked by the filter.