METHODS AND SYSTEM FOR CREATING FOCAL PLANES USING AN ALVAREZ LENS

摘要

Configurations are disclosed for presenting virtual reality and augmented reality experiences to users. The system may comprise a lens assembly comprising two transmissive plates, a first of the two transmissive plates comprising a first surface sag based at least in part on a cubic function, and a DOE to direct image information to a user's eye; wherein the DOE is placed in between the two transmissive plates of the lens assembly, and wherein the DOE is encoded with the inverse of the cubic function corresponding to the surface sag of the first transmissive plate; such that a wavefront created by the encoded DOE is compensated by the wavefront created by the first transmissive plate, thereby collimating light rays associated with virtual content delivered to the DOE.

主权项

1. An augmented reality (AR) display system for delivering augmented reality content to a user, comprising:
an image-generating source to provide one or more frames of image data; a light modulator to transmit light associated with the one or more frames of image data; a lens assembly comprising first and second transmissive plates, the first and second transmissive plates each having a first side and a second side that is opposite to the first side, the first side being a plano side, and the second side being a shaped side, the second side of the first transmissive plate comprising a first surface sag based at least in part on a cubic function, and the second side of the second transmissive plate comprising a second surface sag based at least in part on an inverse of the cubic function; and a diffractive optical element (DOE) to receive the light associated with the one or more frames of image data and direct the light to the user's eyes, the DOE being disposed between and adjacent to the first side of the first transmissive plate and the first side of the second transmissive plate, and wherein the DOE is encoded with refractive lens information corresponding to the inverse of the cubic function such that when the DOE is aligned so that the refractive lens information of the DOE cancels out the cubic function of the first transmissive plate, a wavefront of the light created by DOE is compensated by the wavefront created by the first transmissive plate, thereby generating collimated light rays associated with virtual content delivered to the DOE.