Patent ID: 11890231
Assignee: AMO DEVELOPMENT, LLC
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 10:
11. The method of claim 10, wherein the plurality of optical elements and the plurality of motors of the ophthalmic surgical laser system include:
a high frequency scanner configured to scan the pulsed laser beam back and forth along a fast scan line at a predefined frequency, the fast scan line being centered at a center position and oriented along an orientation;
a scan line rotator including a prism or a set of mirrors mounted on a rotating stage which is rotatable around an axis parallel to a propagation direction of the laser beam, and a first motor configured to drive the rotating stage, wherein the scan line rotator is disposed downstream of the high frequency scanner and is configured to rotate the orientation of the fast scan line;
an XY scan device including either (1) a focusing lens mounted on an XY scanning stage and a second and a third motor respectively configured to move the XY scanning stage in two orthogonal directions, or (2) two orthogonal scanning mirrors and a second and a third motor respectively configured to rotate the two scanning mirrors, wherein the XY scan device is disposed downstream of the high frequency scanner and is configured to move the center position of the fast scan line in two orthogonal directions perpendicular to the propagation direction of the laser beam; and
a Z scan device including a second lens and a fourth motor configured to move the second lens in the propagation direction of the laser beam, wherein the Z scan device is configured to move the center position of the fast scan line in the propagation direction of the laser beam;
wherein the step of calculating the plurality of reconstructed positions of the laser focal spot in the target tissue includes:
synchronizing the actual motor position data for the first to fourth motors at a common set of time points;
for each time point, calculating a reconstructed orientation based on the actual motor position data of the first motor, and calculating a reconstructed center position based on the actual motor position data of the second to fourth motors; and
for each time point, based on the reconstructed center position and the reconstructed orientation, generating a plurality of reconstructed positions which form a reconstructed fast scan line centered at the reconstructed center position and oriented along the reconstructed orientation;
wherein the reconstructed positions for all of the reconstructed fast scan lines at all of the time points form the reconstructed geometric representation of the incision in the target tissue.