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US 12,758,089 B2Granted
Three-dimensional light-field microendoscopy with a grin lens array
AssigneeGeorgia Tech Research Corporation
InventorsShu Jia, Tara Urner, Andrew Inman, Benjamin Lapid
Life of this patent
Estimating the term…
Abstract
An optical microendoscopy includes an endoscopic probe that has a plurality of integrated fiber optics for uniform illumination and an array of gradient index (GRIN) lenses. The GRIN lenses are configured to capture a reflected light field from one or more on-axis sampling of the reflected light field and two or more off-axis sampling of the reflected light field.
Claims17
An optical microendoscopy system, comprising:
- an endoscopic probe, the probe having a plurality of integrated fiber optics for uniform illumination and an array of gradient index (GRIN) lenses configured to capture a reflected light field from one or more on-axis sampling of the reflected light field and two or more off-axis sampling of the reflected light field;
- and
- an image processing unit configured to receive the reflected light field from the endoscopic probe to reconstruct an image using a ray-optics reconstruction operation,
- wherein the image processing unit is configured to employ point-spread function (PSF) calibration in the ray-optics reconstruction operation, and
- wherein the point-spread function (PSF) calibration involves fitting an experimental depth-dependent magnification function M (z) with a ray-optics model of magnification.
2 more elements
A method of operating an optical microendoscopy system, the method comprising:
- providing illumination from an end of an endoscopic probe, the endoscopic probe having a plurality of integrated fiber optic illumination sources for uniform illumination;
- capturing a reflected light field, for light-field imaging, through an array of gradient index (GRIN) lenses, including (i) one or more on-axis sampling of the reflected light field and (ii) two or more off-axis sampling of the reflected light field;
- and
- reconstructing an image, via a ray-optics reconstruction algorithm employing a point-spread function (PSF) calibration, using (i) the one or more on-axis sampling of the reflected light field and (ii) the two or more off-axis sampling of the reflected light field,
- wherein the point-spread function (PSF) calibration involves fitting an experimental depth-dependent magnification function M (z) with a ray-optics model of magnification.
2 more elements
An endoscopic probe, comprising:
- a plurality of integrated fiber optics for uniform illumination and an array of gradient index (GRIN) lenses configured to capture a reflected light field from one or more on-axis sampling of the reflected light field and two or more off-axis sampling of the reflected light field,
- wherein the endoscopic probe is operatively coupled to an image processing unit configured to receive, from the endoscopic probe, the reflected light field to reconstruct an image using a ray-optics reconstruction operation,
- wherein the image processing unit is configured to employ point-spread function (PSF) calibration in the ray-optics reconstruction operation, and
- wherein the point-spread function (PSF) calibration involves fitting an experimental depth-dependent magnification function M (z) with a ray-optics model of magnification.
1 more element
Dependencies are inferred from the claim text.