US 2024/0402394 A1 · Lens Coatings

Abstract

A head-mounted device may have left-eye and right-eye optical modules that may have a display that creates an image and a corresponding lens that provides the image to an eye box for viewing by a user. The optical modules each include a lens barrel to which the display and lens of that optical module are mounted and a head-mounted optical module gaze tracking system. The gaze tracking system may have light-emitting devices such as light-emitting diodes that emit light at a given near infrared wavelength and may operate through the lens and a removable supplemental lens. The supplemental lens may be a prescription lens and may have an antireflection portion that reduces the reflectance of the lens across visible and near infrared wavelengths. The antireflection portion may be a thin-film interference coating or a moth-eye portion. In this way, the gaze tracking system may operate through the removable supplemental lens.

Claims23

Dependent claims

A head-mounted device, comprising:

a housing;
and
optical modules supported by the housing and configured to provide images respectively to first and second eye boxes, wherein each optical module comprises:
a lens barrel;
a display coupled to the lens barrel;
a lens in the lens barrel that provides an image from the display to a corresponding eye box;
a supplemental lens configured to be attached to the lens barrel, wherein the supplemental lens comprises an antireflection coating having a first reflectance of less than 3% across visible wavelengths;
a gaze tracking system in the lens barrel configured to provide illumination at a given near infrared wavelength to the eye box through the lens and the supplemental lens, wherein the supplemental lens has a second reflectance of less than 1.5% at the given near infrared wavelength;
and
a camera in the lens barrel configured to capture an eye image as the illumination is provided to the eye box.

7 more elements

Dependencies are inferred from the claim text.

Lens Coatings

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Lens Coatings

Life of this patent

Abstract

Claims23