Abstract
This paper focuses on the theory and practice of surface-relief holographic diffusers that can diffract scattered light forward or backward. Experimental results show that scattered light diffracted by a holographic diffuser usually possesses similar polarization to that of the incident light and that the phase range of light modulated by a diffuser must be not less than 360° for the diffuser not to produce specular transmission light. Supports for these phenomena are elaborated based on the diffraction theories of gratings.
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