INCREASING AN AREA FROM WHICH A COMPUTER GENERATED HOLOGRAM MAY BE VIEWED

A method of enlarging an observation window from which a Computer Generated Hologram (CGH) may be viewed, including producing a CGH, and shifting a location of an exit pupil of an optical system producing the CGH. A method of increasing a viewing angle from which a Computer Generated Hologram (CGH) may be seen, including producing a plurality of instances of a CGH, projecting each one of the instances in a different direction so that a first exit pupil of a first instance is close to a second exit pupil of a second instance. An optical system including a plurality of exit pupils associated with a plurality of optical components, further including a light deflector for jittering a location of a first exit pupil so as to increase an overlap of the first exit pupil with a second exit pupil. Related apparatus and methods are also described.