Iterative fourier reconstruction for laser surgery and other optical applications
AssigneeAMO Manufacturing USA, LLC
InventorsDimitri Chernyak, Charles E. Campbell, Erik Gross, Seema Somani, Guangming Dai
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Abstract
Methods, systems and software for determining an optical surface model for an optical tissue system using Fourier transformation algorithms. A method of reconstructing optical tissues of an eye comprises transmitting an image through the optical tissues of the eye. The surface gradients from the transmitted image are measured across the optical tissues of the eye. A Fourier transform algorithm is applied to the surface gradients to reconstruct an optical surface model that corresponds to the optical tissues of the eye.
Claims18
A method of determining an optical surface model for an optical tissue system of an eye, comprising:
- inputting optical data from the optical tissue system of the eye, the optical data comprising a set of local gradients within an aperture;
- establishing a gradient field based on the set of local gradients;
- applying a first reconstruction algorithm to the set of local gradients at a first spatial frequency limit to provide a first reconstruction;
- applying a second reconstruction algorithm to the set of local gradients at a second spatial frequency limit to provide a second reconstruction, wherein the second spatial frequency limit is less than the first spatial frequency limit;
- determining which of the first reconstruction and the second reconstruction is more accurate;
- and
- determining the optical surface model based on the more accurate reconstruction.
A method of determining an optical surface model for an optical tissue system of an eye, comprising:
- inputting optical data from the optical tissue system of the eye, the optical data comprising a set of local gradients within an aperture;
- establishing a gradient field based on the set of local gradients;
- deriving a reconstruction from the gradient data by applying a first reconstruction algorithm at a first spatial frequency limit, and by applying a second reconstruction algorithm at a second spatial frequency limit, wherein the second spatial frequency limit is less than the first spatial frequency limit;
- and
- determining the optical surface model based on the reconstruction.
A method of reconstructing optical tissues of an eye, the method comprising:
- transmitting an image through the optical tissues of the eye;
- measuring surface gradients from the transmitted image across the optical tissues of the eye;
- applying a Fourier transform algorithm to the surface gradients to reconstruct a surface that corresponds to the optical tissues of the eye;
- and
- correcting an off-center alignment in the reconstructed and
- computing a correction ablation pattern based on the optical tissues of the eve as indicated by the Fourier reconstructed surface, the computing comprising deriving a proposed change in elevations of the optical tissue so as to effect a desired change in optical properties of the eye.
Dependencies are inferred from the claim text.