Folded optical designs for eye-mounted cameras

Abstract

An eye-mounted device includes a contact lens and an embedded camera, which for convenience will be referred to as a femtocamera. The front aperture of the femtocamera faces away from the user's eye so that the image sensor in the femtocamera detects imagery of a user's external environment. The femtocamera optics has a folded optical path, which is advantageous for fitting the femtocamera into the limited space within the contact lens. In one design, the optics for the femtocamera is based on a two mirror design, with a concave mirror followed by a convex mirror. In an alternate design, the optics for the camera includes an imaging lens near the front aperture.

Dependencies are inferred from the claim text.