Auto-alignment and auto-focus system and method
First Claim
1. A patient positioning system for use with a patient, the system comprising:
- a patient support to position the patient, the patient having an eye with a tissue structure;
an optical image sensor to measure an optical image of the tissue structure;
an optical train to optically couple the positioned eye to the sensor so as to form the image of the tissue structure on the sensor, wherein an optical path extends from the eye to the sensor; and
a processor coupled to the optical image sensor to determine a gradient of an illumination level of the optical tissue structure image, the processor configured to adjust at least one of the optical train or the patient support in response to the gradient so as to focus the image on the sensor.
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Accused Products
Abstract
A patient positioning system for use with a patient comprises an optical image sensor. The optical image sensor measures an optical image of a tissue structure of an eye of the patient. An image sensor support supports the image sensor. A patient support supports the patient. A linkage is coupled to the image sensor support with the patient support. A processor is coupled to the optical image sensor to determine a gradient of an illumination level of the optical tissue structure image. The processor is coupled to the linkage and configured to articulate the linkage so as to adjust a separation distance from the tissue structure to the image sensor in response to the gradient of the optical tissue structure image.
45 Citations
36 Claims
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1. A patient positioning system for use with a patient, the system comprising:
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a patient support to position the patient, the patient having an eye with a tissue structure; an optical image sensor to measure an optical image of the tissue structure; an optical train to optically couple the positioned eye to the sensor so as to form the image of the tissue structure on the sensor, wherein an optical path extends from the eye to the sensor; and a processor coupled to the optical image sensor to determine a gradient of an illumination level of the optical tissue structure image, the processor configured to adjust at least one of the optical train or the patient support in response to the gradient so as to focus the image on the sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A patient positioning system for use with a patient, the system comprising:
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an optical image sensor to measure an optical image of a tissue structure of an eye of the patient; an image sensor support to support the image sensor; a patient support to support the patient; a linkage to couple to the image sensor support with the patient support; and a processor coupled to the optical image sensor to determine a gradient of an illumination level of the optical tissue structure image, the processor coupled to the linkage and configured to articulate the linkage so as to adjust a separation distance from the tissue structure to the image sensor in response to the gradient of the optical tissue structure image. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A patient positioning system for aligning an instrument with an eye of a patient, the system comprising:
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an optical image sensor to capture an optical image of an iris of the eye of the patient, the iris comprising a pupil, the optical image comprising pixels with intensity levels; an image sensor support to support the image sensor; a patient support to support the patient; a linkage to couple to the image sensor support with the patient support; and a processor coupled to the optical image sensor to determine a pupil area of the image in response to intensity levels of the pixels within a range, the processor configured to determine slopes of the pixel intensity levels at the edge of the pupil, the processor coupled to the linkage and configured to articulate the linkage so as to adjust a separation distance from the tissue structure to the image sensor in response to the slopes of the pixel intensity levels at the edge of the pupil. - View Dependent Claims (27, 28, 29)
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30. A method of aligning an instrument with an eye of a patient, the method comprising:
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capturing an image of a tissue structure of the eye with an image sensor, the structure comprising an edge, the image comprising pixels with illumination levels; determining a gradient of the tissue structure in response to the illumination levels of the pixels; and adjusting an optical path from the tissue structure to the image sensor in response to the gradient of the tissue structure. - View Dependent Claims (31, 32, 33, 34)
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35. A method of aligning an instrument with an eye of a patient, the method comprising:
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capturing an image of an iris of the eye with an image sensor, the iris comprising a pupil, the image comprising pixels with intensity levels; determining an area of the pupil in response to the intensity levels of the pixels within a range; determining slopes of the intensity levels at an edge of the pupil near the pupil area; and adjusting an optical path from the iris to the image sensor in response to the slopes to increase the slopes at the edge of the pupil. - View Dependent Claims (36)
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Specification