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Auto-alignment and auto-focus system and method

  • US 7,575,322 B2
  • Filed: 05/11/2007
  • Issued: 08/18/2009
  • Est. Priority Date: 05/11/2007
  • Status: Active Grant
First Claim
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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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