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公开(公告)号：US20240374428A1
公开(公告)日：2024-11-14
申请号：US18661507
申请日：2024-05-10
Applicant: AMO Development, LLC
Inventor： Alireza Malek Tabrizi , Griffith Altmann , Harvey Liu , Zenon Witowski , Mohammad Saidur Rahaman , Hong Fu
IPC: A61F9/008
Abstract: During laser ophthalmic procedures, back-reflected treatment laser light is detected by an auto-Z module and analyzed in real-time to determine various aspects of laser-tissue interaction during the procedure. This method can detect the presence of “black spots” (locations where no laser-tissue interaction occurred), sub-optimal incision quality, etc. in real time, and allows for dynamical adjustment of the laser treatment parameters such as pulse energy, laser spot separation, etc. to correct the detected problems. The auto-Z signal analysis may also depend on which incision segment or region is currently being cut, to optimally control different cutting segments. This method improves corneal incision quality and helps to achieves consistent laser-tissue interaction from patient to patient.
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12.发明申请公开(公告)号：US20220118550A1
公开(公告)日：2022-04-21
申请号：US17450452
申请日：2021-10-08
Applicant: AMO Development, LLC
Inventor： Mohammad Saidur Rahaman , Hong Fu
IPC: B23K26/073 , A61F9/008 , A61B3/10 , A61B3/14
Abstract: An ophthalmic laser surgical system has a built-in imaging sensor for measuring laser focal spot size. An objective lens focuses the laser beam to a focal spot near a reflective surface, scans the focal spot in the depth direction, and focuses light reflected by the reflective surface to form a back-reflected light. A two-dimensional imaging sensor receives a sample of the back-reflected light to generate images of the back-reflected light. During the depth scan, the image contains a well-focused light spot when the laser focal spot is located at a fixed offset distance before the reflective surface, but the light spot in the images is otherwise defocused. The images generated during the scan are analyzed to find the smallest light spot size among the images. The laser focal spot size is then calculated from the smallest light spot size using a magnification factor which is a system constant.
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公开(公告)号：US11215814B2
公开(公告)日：2022-01-04
申请号：US16112507
申请日：2018-08-24
Applicant: AMO DEVELOPMENT, LLC
Inventor： Mohammad Saidur Rahaman , Hong Fu , Roger W. Accurso , Zenon Witowski
Abstract: An ophthalmic laser system uses a non-confocal configuration to determine a laser beam focus position relative to the patient interface (PI) surface. The system includes a light intensity detector with no confocal lens or pinhole between the detector and the objective lens. When the objective focuses the light to a target focus point inside the PI lens at a particular offset from its distal surface, the light signal at the detector peaks. The offset value is determined by fixed system parameters, and can also be empirically determined by directly measuring the PI lens surface by observing the effect of plasma formation at the glass surface. During ophthalmic procedures, the laser focus is first scanned insider the PI lens, and the target focus point location is determined from the peak of the detector signal. The known offset value is then added to obtain the location of the PI lens surface.
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14.发明授权公开(公告)号：US10973688B2
公开(公告)日：2021-04-13
申请号：US16355662
申请日：2019-03-15
Applicant: AMO Development, LLC
Inventor： Harvey I. Liu , Mohammad Saidur Rahaman , Hong Fu , Griffith E. Altmann
Abstract: An ophthalmic laser surgical system uses a confocal detector assembly to continuously detect a confocal signal during laser treatment, and based on the confocal signal, detects in real time a loss of tissue contact with the patient interface (PI) output surface. The detection is partly based on the change of reflectivity at the PI output surface when the optical interface changes from a lens-tissue interface to a lens-air interface. The behavior of the confocal signal upon loss of tissue contact is dependent on the treatment laser scan pattern being performed at the time of tissue contact loss. Thus, different confocal signal analysis algorithms are applied to detect tissue contact loss during different scans, such as the bed cut and side cut for a corneal flap. The real time confocal signal may also be used during eye docking to detect the establishment of tissue contact with the PI output surface.
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15.发明申请公开(公告)号：US20200064622A1
公开(公告)日：2020-02-27
申请号：US16112507
申请日：2018-08-24
Applicant: AMO DEVELOPMENT, LLC
Inventor： Mohammad Saidur Rahaman , Hong Fu , Roger W. Accurso , Zenon Witowski
Abstract: An ophthalmic laser system uses a non-confocal configuration to determine a laser beam focus position relative to the patient interface (PI) surface. The system includes a light intensity detector with no confocal lens or pinhole between the detector and the objective lens. When the objective focuses the light to a target focus point inside the PI lens at a particular offset from its distal surface, the light signal at the detector peaks. The offset value is determined by fixed system parameters, and can also be empirically determined by directly measuring the PI lens surface by observing the effect of plasma formation at the glass surface. During ophthalmic procedures, the laser focus is first scanned insider the PI lens, and the target focus point location is determined from the peak of the detector signal. The known offset value is then added to obtain the location of the PI lens surface.
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Patent Agency Ranking
公开(公告)号：US20170367883A1
公开(公告)日：2017-12-28
申请号：US15630629
申请日：2017-06-22
Applicant: AMO Development, LLC
Inventor： Alireza Malek Tabrizi , Hong Fu , James E. Hill , Mohammad Saidur Rahaman , Zenon Witowski
CPC classification number: A61F9/0084 , A61B18/20 , A61B2018/00601 , A61F9/00827 , A61F2009/00872 , A61F2009/00897
Abstract: Embodiments generally relate to ophthalmic laser procedures and, more particularly, to systems and methods for lenticular laser incision. In an embodiment, an ophthalmic surgical laser system comprises a laser delivery system for delivering a pulsed laser beam to a target in a subject's eye, an XY-scan device to deflect the pulsed laser beam, a Z-scan device to modify a depth of a focus of the pulsed laser beam, and a controller configured to form a top lenticular incision and a bottom lenticular incision of a lens in a corneal stroma.
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公开(公告)号：US20250073081A1
公开(公告)日：2025-03-06
申请号：US18817116
申请日：2024-08-27
Applicant: AMO Development, LLC
Inventor： Hong Fu , Mohammad Saidur Rahaman
Abstract: In a femtosecond laser eye surgery system where beam delivery is accomplished with a moving objective, a dual-channel imaging system allows real-time procedure visualization before and during incision. The first (docking) imaging channel covers a full field of view (FoV) of the eye, e.g., 13 mm; the second (cutting) imaging channel is through the objective and moves with it, and covers a smaller FoV, e.g., 2 mm. During eye docking and undocking, the objective is moved to a parking position out of the visual field of the docking imaging channel, and the latter operates to provide process visualization. During incision, a composite eye image is displayed, composed of a stationary image captured by the docking imaging channel before treatment began overlayed with live cutting images captured by the cutting imaging channel. The live cutting images are compared to the stationary image in real time to detect eye movement.
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18.发明授权公开(公告)号：US12128497B2
公开(公告)日：2024-10-29
申请号：US17450452
申请日：2021-10-08
Applicant: AMO Development, LLC
Inventor： Mohammad Saidur Rahaman , Hong Fu
IPC: A61F9/008 , A61B3/10 , A61B3/14 , B23K26/073
CPC classification number: B23K26/073 , A61B3/1025 , A61B3/14 , A61F9/00802 , A61F2009/00897
Abstract: An ophthalmic laser surgical system has a built-in imaging sensor for measuring laser focal spot size. An objective lens focuses the laser beam to a focal spot near a reflective surface, scans the focal spot in the depth direction, and focuses light reflected by the reflective surface to form a back-reflected light. A two-dimensional imaging sensor receives a sample of the back-reflected light to generate images of the back-reflected light. During the depth scan, the image contains a well-focused light spot when the laser focal spot is located at a fixed offset distance before the reflective surface, but the light spot in the images is otherwise defocused. The images generated during the scan are analyzed to find the smallest light spot size among the images. The laser focal spot size is then calculated from the smallest light spot size using a magnification factor which is a system constant.
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公开(公告)号：US11789256B2
公开(公告)日：2023-10-17
申请号：US17643584
申请日：2021-12-09
Applicant: AMO DEVELOPMENT, LLC
Inventor： Mohammad Saidur Rahaman , Hong Fu , Roger W. Accurso , Zenon Witowski
CPC classification number: G02B26/0875 , A61B3/13 , A61F9/008 , G01J1/4257 , G02B27/108 , A61F2009/00855 , A61F2009/00897
Abstract: An ophthalmic laser system uses a non-confocal configuration to determine a laser beam focus position relative to the patient interface (PI) surface. The system includes a light intensity detector with no confocal lens or pinhole between the detector and the objective lens. When the objective focuses the light to a target focus point inside the PI lens at a particular offset from its distal surface, the light signal at the detector peaks. The offset value is determined by fixed system parameters, and can also be empirically determined by directly measuring the PI lens surface by observing the effect of plasma formation at the glass surface. During ophthalmic procedures, the laser focus is first scanned insider the PI lens, and the target focus point location is determined from the peak of the detector signal. The known offset value is then added to obtain the location of the PI lens surface.
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公开(公告)号：US20220168144A1
公开(公告)日：2022-06-02
申请号：US17651242
申请日：2022-02-15
Applicant: AMO Development, LLC
Inventor： Alireza Malek Tabrizi , Hong Fu , James E. Hill , Mohammad Saidur Rahaman , Zenon Witowski
Abstract: Embodiments generally relate to ophthalmic laser procedures and, more particularly, to systems and methods for lenticular laser incision. In an embodiment, an ophthalmic surgical laser system comprises a laser delivery system for delivering a pulsed laser beam to a target in a subject's eye, an XY-scan device to deflect the pulsed laser beam, a Z-scan device to modify a depth of a focus of the pulsed laser beam, and a controller configured to form a top lenticular incision and a bottom lenticular incision of a lens in a corneal stroma.
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