MOTION DETECTOR FOR EYE ABLATIVE LASER DELIVERY SYSTEMS

摘要

Improved system (100), devices, and methods are provided for verifying the scanning motion or adjustment of a laser beam (210). The system (100) can advantageously be used on laser eye surgery where accurate control of the laser beam (210) is crucial for patient safety and successful vision correction. In one embodiment, a laser system is provided for sculpting a portion of the eye (E). The system (100) includes a laser (204) for generating a laser beam suitable for ablation of a portion of the eye (E). A laser beam adjustment mechanism (126) is optically coupled to the laser beam (210) from the laser (204). The adjustment mechanism (126) scans or adjusts the laser beam in accordance with a predetermined ablation pattern of the laser beam on the eye (E). An energy motion sensor (110) optically coupled to the laser beam downstream from the adjustment mechanism is provided to verify adjustment of the laser beam (210) in accordance with the ablation pattern. Typically, the energy motion sensor (110) has a mask arranged to block varying portions of the laser beam in response to laser beam adjustment. Positioning of the laser beam (210) is verified by comparing anticipated energy readings from the sensor (110) based on the expected positional adjustment of the beam on the mask and actual energy readings measured by the sensor during the eye (E) ablative procedure.