Hybrid varifocal lens
AssigneeFacebook Technologies, LLC
InventorsLu Lu, Wai Sze Tiffany Lam, Yusufu Njoni Bamaxam Sulai
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Abstract
A hybrid lens is disclosed including optically coupled varifocal lens and adaptive lens. The varifocal lens is configured for varying optical power of the hybrid lens, and an adaptive lens includes a voltage-controlled element for varying optical power of the adaptive lens in coordination with varying the optical power of the varifocal lens and responsive to variation of the optical power of the hybrid lens, for lessening an optical aberration of the hybrid lens. The hybrid lens may be used in head-mounted displays e.g. for lessening a vergence-accommodation conflict.
Claims14
A hybrid lens apparatus comprising:
- a hybrid lens comprising a varifocal lens for varying optical power of the hybrid lens, and a multifocal lens optically coupled to the varifocal lens and comprising a voltage-controlled element for switching optical power of the multifocal lens;
- and
- a controller operably coupled to the varifocal and multifocal lenses and configured to vary optical power of the varifocal lens in coordination with switching the optical power of the multifocal lens, thereby lessening an optical aberration of the hybrid lens as the optical power of the hybrid lens is varied;
- wherein the controller is configured to adjust optical power of the hybrid lens within predefined optical power sub-ranges, wherein each optical power value of the multifocal lens corresponds to a particular one of the predefined optical power sub-ranges of the hybrid lens.
Dependencies are inferred from the claim text.