Future Apple Vision Pros may have “Liquid Lens” that adjust to a user’s vision, a newly granted Apple patent reveals.
About the patent
According to the patent, the lenses of a head-mounted device such as the Vision Pro may include tunable liquid lenses. Each lens may have a lens chamber filled with liquid. The lens chamber may have rigid and/or flexible walls that form optical lens surfaces. Actuators and/or pump and reservoir systems may deform the lens surfaces in response to control signals from a control circuit to tune the lens.
What’s the point? Apple says that liquid lens, in response to the control signals, could automatically adjust to accommodate users with different types of vision (nearsightedness, farsightedness, etc.) and/or to display images at different image distances (e.g., to create virtual images in different image planes).
Summary of the patent
Here’s Apple’s abstract of the patent: “A head-mounted device may have lenses. A user may view images through the lenses from eye boxes. The lenses may be tunable liquid lenses. Each lens may have a lens chamber. The lens chamber of the lens may have rigid and/or flexible walls that form optical lens surfaces. Actuators and/or pump and reservoir systems may deform the lens surfaces in response to control signals from a control circuit to tune the lens.
“Each liquid lens may have oil or other liquid in the lens chamber for that lens. Inorganic dielectric particles or other refractive-index-adjustment particles may be used to adjust the refractive index of the lens. The particles may be subwavelength in size.”
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