Beam divergence and various collimators for holographic or stereoscopic displays

A holographic display comprising an illumination device, an enlarging unit and a light modulator, wherein:

• the illumination device comprises at least one light source and a light collimation unit, the light collimation unit collimating the light of the at least one light source and generating a light wave field of the light that is emitted by the light source with a specifiable angular spectrum of plane waves, where the illumination device is designed as a line-shaped illumination device which generates a statistic, temporally variable spatial variation of the phase of the light;
• the enlarging unit is disposed downstream of the light collimation unit, seen in the direction of light propagation, the enlarging unit comprising at least one volume hologram realizing a broadening of the light wave field due to an interaction of the light wave field with the volume hologram;
• and
• the light modulator is disposed upstream or downstream of the enlarging unit, seen in the direction of light propagation.