Optical systems

A method of displaying an image holographically on a display surface, the method comprising:

• inputting image data defining said image for display;
• generating hologram data from said image data;
• using said hologram data to display said image;
• and
• wherein said generating of said hologram data further comprises correcting for an optical aberration due to a shape of said display surface.

A holographic image projection system to display an image holographically on a display surface, said display surface not being flat, the system comprising:

• a spatial light modulator (SLM) to display a hologram;
• an illumination system to illuminate said displayed hologram;
• projection optics to project light from said illuminated displayed hologram onto said display surface to form said image;
• and
• a processor having an input to receive image data for display and having an output for driving said SLM, and wherein said processor is configured to process said image data to generate hologram data for display on said SLM to form said image on said display surface;
• the system further comprising a non-volatile data memory coupled to said processor to store wavefront correction data for said display surface;
• and
• wherein said processor is configured to apply a wavefront correction responsive to said stored wavefront correction data when generating said hologram data to correct said image for aberration due to a shape of said display surface.