Corrective optics for reducing fixed pattern noise in a virtual reality headset

摘要

A virtual reality (VR) headset includes an electronic display element and a corrective optics block. The electronic display element outputs image light via a plurality of sub-pixels of different colors that are separated from each other by a dark space. The corrective optics block includes an optical element including a diffractive surface. The corrective optics block is configured to magnify the image light and generate optically corrected image light by using the diffractive surface to generate blur spots of each sub-pixel masking dark space between adjacent sub-pixels. Optically corrected light is directed form the corrective optics block to an exit pupil of the VR headset for presentation to a user.

主权项

1. A virtual reality headset comprising:
an electronic display element configured to output image light via a plurality of sub-pixels having different colors, sub-pixels separated from each other by a dark space; and a corrective optics block including an optical element that includes a convex surface and a Fresnel surface, the Fresnel surface positioned to receive the image light from the electronic display element and to generate the optically corrected image light, the corrective optics block configured to:
magnify the image light received from the electronic display element,generate optically corrected image light by generating blur spots to mask the dark space between adjacent sub-pixels using the Fresnel surface, each blur spot corresponding to a blurred image of a sub-pixel in the image light, anddirect, using the convex surface, the optically corrected image light to an exit pupil of the VR headset corresponding to a location of an eye of a user of the VR headset, and a center of the exit pupil is at least 10 mm from the convex surface.