System and method of wavefront sensing
AssigneeWaveFront Sciences, Inc.
InventorDaniel Topa
Life of this patent
Estimating the term…
Abstract
A system and method of wavefront sensing with a Shack-Hartmann wavefront sensor precisely locates focal spots on a detector array, and determines the location of the lenslet array with respect to the detector array.
Claims19
A method of estimating a location of a center of a focal spot of a lenslet of a detector array comprising a plurality of lenslets and a plurality of pixels adapted to receive light from the plurality of lenslets, the method comprising:
- measuring pixel values;
- and
- least squares fitting the measured pixel values to an a priori irradiance distribution.
For a detector array comprising a plurality of lenslets and a plurality of pixels adapted to receive light from the plurality of lenslets, a method of determining locations of the lenslets, comprising:
- measuring intensity values of light spots produced by the detector array;
- and
- analyzing the measured intensity values to determine at least one of the centers, vertices, and rotations of the lenslets.
A method of reconstructing a wavefront from gradient data, comprising:
- obtaining gradient data from a Shack-Hartmann wavefront sensor comprising a lenslet array and a plurality of pixels;
- mapping boundaries of each lenslet onto a grid of the pixels;
- and
- numerically calculating the wavefront at a plurality of vertices of said mapped boundaries.
A method of reconstructing a wavefront from gradient data in terms of orthogonal polynomials, comprising:
- performing a first calculation on a non-orthogonal basis set;
- determining a set of fit coefficients for the non-orthogonal basis set;
- defining a transformation matrix that converts data from the non-orthogonal basis set to an orthogonal basis set;
- and
- multiplying the set of fit coefficients for the non-orthogonal basis set by the transform matrix to determine a set of coefficients for the orthogonal basis set.
Dependencies are inferred from the claim text.