Compact hologram display system with LED direct illumination

A new compact hologram display system is presented. An LED is used to illuminate the hologram directly in air with around 85 degrees incidence. No intermediate element is used between the light source and the hologram so that the system is extremely compact and the hologram recording process is simple. The mechanism of the generation of harmful interference fringes on the hologram is analyzed, and the proposed method eliminates the harmful fringes effectively.

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