Focus modulation optical system and holographic display apparatus

摘要

Disclosed are a focus modulation optical system and a holographic display device including the same. The holographic display device comprises: a light source irradiating a plurality of color lights; and a focus modulation optical system including at least one variable focus lens for changing focus positions of the plurality of color lights by the electrical control. The holographic display device can reduce the chromatic aberration and provide a high quality three-dimensional image.