Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2005-03-08
2005-03-08
Luu, Thanh X. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C606S005000, C606S011000
Reexamination Certificate
active
06864478
ABSTRACT:
Improved methods, apparatus and systems for monitoring laser beam position enhance the safety and efficacy of laser eye surgery systems. The present invention will advantageously be used in laser eye surgery where accurate control of the laser beam is crucial for patient safety and successful vision correction. In one embodiment, a first beam of laser energy is directed through a scanning mechanism toward an eye to ablate the eye, and a second beam of laser energy is directed through the scanning mechanism toward a sensor. When the scanning mechanism is moved by a laser eye surgery system to move the first beam across the eye, the scanning mechanism also moves the second beam across the sensor. Movement of the beam across the sensor can be used to monitor movement of the first beam across the eye. If actual movement of the first beam across the eye does not match desired movement of the beam, one or more components of the laser surgery system will shut down in order to stop the laser eye surgery procedure, thus preventing undesirable ablation of the eye.
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Luu Thanh X.
Townsend and Townsend / and Crew LLP
VISX, Incorporation
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