FEMTOSECOND LASER FOR OPHTHALMIC SURGERY EMPLOYING A RESONANT SCANNER WITH IMPROVED UNIFORMITY OF LASER SPOT DISTRIBUTION

Abstract: in a femtosecond ophthalmic laser system which employs a high frequency resonant scanner to produce a laser scanline and xy and z scanners to move the scanline in a patient's eye to perform eye surgery, a beam blocking member is placed near an internal focus plane of the optical system to block some of the beam paths to truncate the laser scanline at the two ends. this eliminates the closely spaced or overlapping laser focus spots near the ends of the scanline. the beam blocking member has a plate shape with one or more apertures of different shapes or sizes, and is movable in the transverse direction to different positions to block different amounts of the scanline.

Inventor(s): Mohammad Saidur Rahaman, Pavel Vodkin, Rongwei Xuan, Yang Te Fan, Hong Fu

CPC Classification: A61F9/0084 (using laser)

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