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We propose an integral imaging 3D display based on top‐hat diffusing screen. The integral imaging 3D display consists of a 2D display, a micro‐lens array, and a top‐hat diffusing screen. The top‐hat diffusing screen is composed of multiple elemental lenses with different pitches. The light rays pass through the top‐hat diffusing screen to form a regular light spot, and the light intensity distribution...