Wavefront calibration analyzer and methods
First Claim
1. A method for analyzing calibration of a laser ablation system for performing an ablation procedure on an eye, the method comprising:
- selectively ablating a test surface with the laser system;
directing light from a light source through the test surface; and
analyzing the light, after the light has passed through the test surface, to determine a refractive power of the test surface and at least one additional ablation characteristic of the laser ablation system, wherein analyzing comprises measuring wavefront data generated using the light, and using a reconstruction algorithm to generate a surface map of the test surface.
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Abstract
A wavefront sensor enhances calibration of a laser ablation system, such as a laser eye surgery system, by measuring one or more characteristics of an ablated test surface. Typically, light is passed through the ablated test surface, and the light is analyzed to determine the test surface characteristics. In some embodiments, the ablated test surface is positioned along a treatment plane. In some embodiments, light is passed through a wavefront sensor, such as a Hartmann-Shack sensor, to convert the light into electrical signals. A processor then converts the electrical signals into data, such as surface maps showing high-order aberrations and/or artifacts on the test surface, refractive power measurements, shape measurements, and the like. Generated data may then be used to calibrate a laser surgery system.
47 Citations
44 Claims
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1. A method for analyzing calibration of a laser ablation system for performing an ablation procedure on an eye, the method comprising:
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selectively ablating a test surface with the laser system; directing light from a light source through the test surface; and analyzing the light, after the light has passed through the test surface, to determine a refractive power of the test surface and at least one additional ablation characteristic of the laser ablation system, wherein analyzing comprises measuring wavefront data generated using the light, and using a reconstruction algorithm to generate a surface map of the test surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for analyzing calibration of a laser ablation system for performing an ablation procedure on an eye, the method comprising:
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selectively ablating a test surface with the laser system; directing light from a light source through the test surface; and analyzing the light, after the light has passed through the test surface, to determine a refractive power of the test surface and at least one additional ablation characteristic of the laser ablation system, the light being analyzed by transforming the light into electrical signals, and wherein transforming the light comprises; allowing the light to pass through a wavefront lens array; and sensing the passed light with a light detection device; and wherein analyzing comprises processing the electrical signals to determine refractive power and the at least one additional ablation characteristic. - View Dependent Claims (23, 24)
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25. A calibration apparatus for use with a laser ablation system, the laser ablation system capable of reshaping a surface by selective laser ablation of the surface, the calibration apparatus comprising:
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a selectively laser ablatable test surface; a light detection assembly, the light detection assembly comprising a wavefront sensor; a light source for passing light through the ablated test surface, towards the light detection assembly; and a processor coupled with the light detection assembly for analyzing the detected light to determine a refractive power of the test surface and at least one additional ablation characteristic of the laser ablation system, wherein the processor comprises hardware, software, and/or firmware for applying at least one of a Zernike reconstruction algorithm and a Fourier reconstruction algorithm to derive at least one surface map of the test surface from wavefront data measured by the light detection assembly. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification