Patent ID: 11872163
Assignee: AMO DEVELOPMENT, LLC
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. An ophthalmic surgical laser system comprising:
a laser delivery head, including optics which define an optical axis for delivering a laser beam to an eye of a patient;
a patient interface device having a magnet configured to generate a magnetic field;
three or more magnetic field sensors affixed on the laser delivery head and located at defined locations in a plane perpendicular to the optical axis, each capable of measuring a magnitude of the magnetic field generated by the magnet of the patient interface device, and
a control device electrically coupled to the three or more magnetic field sensors and the laser delivery head, and configured to:
control each of the three or more magnetic field sensors to measure the magnitude of the magnetic field generated by the magnet of the patient interface device, and
based on comparisons of the measured magnetic field magnitudes from the three or more sensors, determine whether or not the patient interface device is located within a predetermined distance from the optical axis, and
based on comparisons of the measured magnetic field magnitudes from the three or more sensors, move the laser delivery head toward the patient interface device.