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Uniform Luminance Light Field Near Eye Display Using Pinhole Arrays and Gradual Virtual Aperture

In conventional light field near eye display (LF-NED) using pinhole aperture arrays, as the pupil size changes under different conditions, the overlapping area of adjacent elemental images is not certain. This is the primary cause of an uncertain net-shaped bright-dark pattern on the image plane. In this paper, a proof-of-concept light field near eye display prototype for virtual reality applications based on pinhole aperture arrays is built, with a binocular field of view (FOV) of 84°×77°. Then, we design gradual virtual apertures on the original light field image, to relieve the net-shaped bright-dark pattern. By blocking the useless part of the image and modulating the luminance of the overlapping areas gradually according to their positions, the bright-dark pattern is effectively relieved and an approximately uniform luminance distribution on the image plane is generated.