Wearable inward-facing camera utilizing the Scheimpflug principle
First Claim
1. A wearable device, comprising:
- a frame configured to be worn on a user'"'"'s head; and
an inward-facing camera (camera) physically coupled to the frame;
wherein the optical axis of the camera is either above the Frankfort horizontal plane and pointed upward to capture an image of a region of interest (ROI) above the user'"'"'s eyes, or the optical axis is below the Frankfort horizontal plane and pointed downward to capture an image of an ROI below the user'"'"'s eyes;
the camera comprises a sensor and a lens;
wherein the sensor plane is tilted by more than 2°
relative to the lens plane according to the Scheimpflug principle in order to capture a sharper image.
1 Assignment
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Accused Products
Abstract
One aspect of this disclosure involves a wearable device that includes a frame that is worn on a user'"'"'s head, and an inward-facing camera (camera) physically coupled to the frame. The optical axis of the camera is either above the Frankfort horizontal plane and pointed upward to capture an image of a region of interest (ROI) above the user'"'"'s eyes, or the optical axis is below the Frankfort horizontal plane and pointed downward to capture an image of an ROI below the user'"'"'s eyes. The camera includes a sensor and a lens. The sensor plane is tilted by more than 2° relative to the lens plane according to the Scheimpflug principle in order to capture a sharper image. The Scheimpflug principle is a geometric rule that describes the orientation of the plane of focus of a camera when the lens plane is tilted relative to the sensor plane.
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Citations
20 Claims
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1. A wearable device, comprising:
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a frame configured to be worn on a user'"'"'s head; and an inward-facing camera (camera) physically coupled to the frame;
wherein the optical axis of the camera is either above the Frankfort horizontal plane and pointed upward to capture an image of a region of interest (ROI) above the user'"'"'s eyes, or the optical axis is below the Frankfort horizontal plane and pointed downward to capture an image of an ROI below the user'"'"'s eyes;the camera comprises a sensor and a lens;
wherein the sensor plane is tilted by more than 2°
relative to the lens plane according to the Scheimpflug principle in order to capture a sharper image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A device comprising:
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an inward-facing head-mounted camera (camera) configured to capture, when worn on a user'"'"'s head, an image of a region of interest (ROI) on at least one of the following regions on the user'"'"'s face;
the forehead, the nose, the upper lip, a cheek, and the lips; andthe camera comprises a sensor and a lens;
wherein the sensor plane is tilted by more than 2°
relative to the lens plane according to the Scheimpflug principle in order to capture a sharper image. - View Dependent Claims (20)
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Specification