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US 11,766,170 B2Granted
Focus stacking for retinal imaging
AssigneeVerily Life Sciences LLC
InventorsDhruv Lamba, Sam Kavusi
Life of this patent
Estimating the term…
Abstract
A system for imaging a retina includes an optical relay system having a first lens for positioning proximate to an eye, a light source positioned to illuminate the eye, an image sensor positioned to capture a retinal image of the retina through the first lens, an aperture disposed between the image sensor and the first lens along an optical path extending from the image sensor through the first lens, and a processing apparatus. The aperture surrounds the optical path and is adapted to block off-axis reflections from the eye.
Claims22
A system for imaging a retina, the system comprising:
- an optical relay system including a first lens for positioning proximate to an eye;
- a light source positioned to illuminate the eye;
- an image sensor positioned to capture a retinal image of the retina through the first lens;
- an aperture disposed between the image sensor and the first lens along an optical path extending from the image sensor through the first lens, the aperture surrounding the optical path and adapted to block off-axis reflections from the eye;
- and
- a processing apparatus communicatively coupled to the image sensor and the light source, wherein the processing apparatus includes logic that when executed by the processing apparatus causes the system to perform operations including:
- illuminating the eye with the light source;
- and
- capturing the retinal image with the image sensor,
- wherein the light source comprises a plurality of light emitting diodes (LEDs) disposed on either side of the optical path.
7 more elements
A system for imaging a retina, the system comprising:
- an optical relay system including a first lens for positioning proximate to an eye;
- an image sensor positioned to capture a retinal image of the retina through the first lens;
- a light source for generating illumination of the eye;
- a display to output a fixation target;
- a beam splitter disposed in an optical path extending from the image sensor through the first lens, the beam splitter positioned between the image sensor and the first lens and adapted to redirect the fixation target output from the display along the optical path out through the first lens for viewing by the eye;
- and
- a processing apparatus communicatively coupled to the image sensor, the light source, and the display, wherein the processing apparatus includes logic that when executed by the processing apparatus causes the system to perform operations including:
- generating the fixation target;
- illuminating the retina of the eye with the light source;
- and
- capturing the retinal image with the image sensor while illuminating the eye,
- wherein the optical relay system further comprises:
- a second lens disposed between the beam splitter and the image sensor;
- and
- a third lens disposed between the display and the beam splitter.
12 more elements
A system for imaging a retina, the system comprising:
- an optical relay system including a first lens for positioning proximate to an eye;
- a light source positioned to illuminate the eye;
- an image sensor positioned to capture a retinal image of the retina through the first lens;
- an aperture disposed between the image sensor and the first lens along an optical path extending from the image sensor through the first lens, the aperture surrounding the optical path and adapted to block off-axis reflections from the eye;
- and
- a processing apparatus communicatively coupled to the image sensor and the light source, wherein the processing apparatus includes logic that when executed by the processing apparatus causes the system to perform operations including:
- illuminating the eye with the light source;
- and
- capturing the retinal image with the image sensor,
- wherein the light source comprises a plurality of light emitting diodes (LEDs) positioned relative to the first lens such that the light output from the LEDs does not pass through the first lens prior to illuminating the eye.
7 more elements
A system for imaging a retina, the system comprising:
- an optical relay system including a first lens for positioning proximate to an eye;
- a light source positioned to illuminate the eye;
- an image sensor positioned to capture a retinal image of the retina through the first lens;
- an aperture disposed between the image sensor and the first lens along an optical path extending from the image sensor through the first lens, the aperture surrounding the optical path and adapted to block off-axis reflections from the eye, wherein the aperture includes one or more optical films configured as a low pass filter to substantially block infrared light from passing through the aperture along the optical path to the image sensor;
- and
- a processing apparatus communicatively coupled to the image sensor and the light source, wherein the processing apparatus includes logic that when executed by the processing apparatus causes the system to perform operations including:
- illuminating the eye with the light source;
- and
- capturing the retinal image with the image sensor.
6 more elements
Dependencies are inferred from the claim text.