Abstract: System and methods are provided for characterizing an internal surface of a lens using interferometry measurements. Sphere-fitting a distorted radius determines distorted pathlengths. Ray-tracing simulates refraction at all upstream surfaces to determine a cumulative path length. A residual pathlength is scaled by the group-index and rays are propagated based on the phase-index. After aspheric surface fitting, a corrected radius is determined. To estimate a glass type for the lens, a thickness between focal planes of the lens surfaces is determined using RCM measurements. Then, for both surfaces, the surface is positioned into focus, interferometer path length matching is performed, a reference arm is translated to stationary phase point positions for three wavelengths to determine three per-color optical thicknesses, and ray-tracing is performed. A glass type is identified by minimizing an error function based on optical parameters of the lens and parameters determined from known glass types from a database.

Abstract: System and methods are provided for characterizing an internal surface of a lens using interferometry measurements. Sphere-fitting a distorted radius determines distorted pathlengths. Ray-tracing simulates refraction at all upstream surfaces to determine a cumulative path length. A residual pathlength is scaled by the group-index and rays are propagated based on the phase-index. After aspheric surface fitting, a corrected radius is determined. To estimate a glass type for the lens, a thickness between focal planes of the lens surfaces is determined using RCM measurements. Then, for both surfaces, the surface is positioned into focus, interferometer path length matching is performed, a reference arm is translated to stationary phase point positions for three wavelengths to determine three per-color optical thicknesses, and ray-tracing is performed. A glass type is identified by minimizing an error function based on optical parameters of the lens and parameters determined from known glass types from a database.

Abstract: Systems and methods for image-based guidance using automated instrument tracking. An en face image frame, generated from en face image data captured by a first imaging system (e.g., an SER imaging system), is analyzed to determine a location of an instrument in the first imaging plane. A control signal is then generated for the movement stage to control the scanning movement of a depth-based imaging system (e.g., an OCT imaging system) based on the determined location of the instrument. In some implementations, a trained neural-network is used to determine the location of the instrument based on the en face image frame and, in some implementations, the control signal adjusts the speed of the scanning movement to capture image data at a higher density7 at areas corresponding to the determined location of the instrument.

Abstract: System and methods are provided for characterizing an internal surface of a lens using interferometry measurements. Sphere-fitting a distorted radius determines distorted pathlengths. Ray-tracing simulates refraction at all upstream surfaces to determine a cumulative path length. A residual pathlength is scaled by the group-index and rays are propagated based on the phase-index. After aspheric surface fitting, a corrected radius is determined. To estimate a glass type for the lens, a thickness between focal planes of the lens surfaces is determined using RCM measurements. Then, for both surfaces, the surface is positioned into focus, interferometer path length matching is performed, a reference arm is translated to stationary phase point positions for three wavelengths to determine three per-color optical thicknesses, and ray-tracing is performed. A glass type is identified by minimizing an error function based on optical parameters of the lens and parameters determined from known glass types from a database.

Abstract: System and methods are provided for characterizing an internal surface of a lens using interferometry measurements. Sphere-fitting a distorted radius determines distorted pathlengths. Ray-tracing simulates refraction at all upstream surfaces to determine a cumulative path length. A residual pathlength is scaled by the group-index and rays are propagated based on the phase-index. After aspheric surface fitting, a corrected radius is determined. To estimate a glass type for the lens, a thickness between focal planes of the lens surfaces is determined using RCM measurements. Then, for both surfaces, the surface is positioned into focus, interferometer path length matching is performed, a reference arm is translated to stationary phase point positions for three wavelengths to determine three per-color optical thicknesses, and ray-tracing is performed. A glass type is identified by minimizing an error function based on optical parameters of the lens and parameters determined from known glass types from a database.

Abstract: Fiber optic methods and systems angularly and spatially offset back reflections away from numerical apertures of a core and inner cladding of a double-clad fiber (DCF) that transmits light to downstream optical interfaces. Back reflections from near and/or far downstream optical interfaces are offset away from the numerical aperture of the core and inner cladding by (1) adjusting an axial length between the DCF end face and the near and/or far reflective optical interfaces, and (2) angling the near and/or the far optical interfaces to angularly and spatially displace back reflections away from the core and inner cladding. No-core fiber fusion spliced to the DCF, or a wedge prism attached to the DCF by index matched gel may be used to adjust the axial lengths and angled the reflections.

Abstract: Systems and methods are provided for a microscope-integrated intraoperative scanner system having automated tracking of an instrument tip. A scanning mirror is configured such that a field of view of the OCT system is determined by a position or orientation of the scanning mirror. A drive system is configured to control the scanning mirror. Camera assemblies are configured to determine respective two-dimensional projections of the positions of markers attached to a surgical instrument. A stereo vision system is configured to determine a three-dimensional location of each of the markers from the determined two-dimensional positions. An instrument tracking component is configured to determine a position of a working tip of the surgical instrument according to the determined three-dimensional locations. A drive control is configured to instruct the drive system to adjust the scanner mirror to control the field of view of the OCT system.

Abstract: Systems and methods are provided for a microscope-integrated intraoperative scanner system having automated tracking of an instrument tip. A scanning mirror is configured such that a field of view of the OCT system is determined by a position or orientation of the scanning mirror. A drive system is configured to control the scanning mirror. Camera assemblies are configured to determine respective two-dimensional projections of the positions of markers attached to a surgical instrument. A stereo vision system is configured to determine a three-dimensional location of each of the markers from the determined two-dimensional positions. An instrument tracking component is configured to determine a position of a working tip of the surgical instrument according to the determined three-dimensional locations. A drive control is configured to instruct the drive system to adjust the scanner mirror to control the field of view of the OCT system.