An optical test system and corresponding method disclosed herein provides highly accurate test data for both sides of a lens simultaneously and efficiently to analyze the surface topography and/or geometric parameters of a lens or lens system. More particularly, the optical test system and corresponding method moves the lens in test plane to align a plurality of points of a test pattern on a lens surface with a vertical axis while probes aligned with the vertical axis and on opposing sides of the lens simultaneously collect wavelength-specific data for both lens surfaces. The optical test system uses the collected wavelength-specific data to produce a surface topography and/or the associated lens geometric parameters for each lens surface.

A device for determining a layer thickness in a multilayer film includes a radiation source configured to generate an electromagnetic primary radiation, a detector configured to detect an electromagnetic secondary radiation emitted by the multilayer film, the secondary radiation being induced by an interaction of the primary radiation with the multilayer film, and a first contact block transparent to the electromagnetic primary radiation and having a first contact surface for creating contact with the multilayer film. The radiation source is arranged on the first contact block in such a way that the electromagnetic primary radiation is guided from the first contact block onto the multilayer film.

A product slicer having an adjustable gauge plate precisely positioned by the unique cooperation of a cam plate and a cam follower.

A computer-assisted surgery system has inertial sensor unit connected to an instrument and producing readings representative of its orientation. A computer-assisted surgery processor unit has a coordinate system module for setting a pelvic coordinate system from readings of the inertial sensor unit when the instrument is in a given orientation relative to the pelvis, a tracking module for tracking an orientation of the instrument relative to the pelvic coordinate system during movements thereof and a geometrical relation data module for recording preoperatively a landmark orientation relative to the pelvic coordinate system and a distance when the at least one instrument has a first end abutted to a pelvic landmark and a second end abutted to a leg landmark, for recording after implant rejointing the medio-lateral orientation and the distance, and for calculating a leg length discrepancy and/or an offset, based on the distances and the medio-lateral orientations.

A device for determining a layer thickness in a multilayer film includes a radiation source configured to generate an electromagnetic primary radiation, a detector configured to detect an electromagnetic secondary radiation emitted by the multilayer film, the secondary radiation being induced by an interaction of the primary radiation with the multilayer film, and a first contact block transparent to the electromagnetic primary radiation and having a first contact surface for creating contact with the multilayer film. The radiation source is arranged on the first contact block in such a way that the electromagnetic primary radiation is guided from the first contact block onto the multilayer film.

Systems and methods for non-invasively determining a water content, a solute content, and a thickness of plant tissue are disclosed. A system includes a sensing device having a first piece and a second piece, where the first piece and the second piece are coupled together to form a clip. The system further includes a capacitive tissue sensor including a capacitor. The capacitor includes a plurality of coplanar conductive plates. The first piece and the second piece are biased in a closed position to provide a gripping force around the plant tissue such that at least a portion of the plant tissue contacts the plurality of coplanar conductive plates.

A metrological instrument configured to measure diameters comprises one or more guide rails, a plurality of clamping blocks configured to removably or releaslably securely locate the blocks on the one or more guide rails, and also configured to removably or releaslably securely clamp a measurement arm substantially normal to the one or more guide rails. A displacement transducer, such as a dial indicator or a digital indicator, may be disposed at an end of one or more of the measurement arms for determining a displacement, relative or absolute, between the measurement arms. To provide the required measurement accuracy, precision, and repeatability, the instrument may be configured with carbon fiber reinforced composite guide rails, and/or measurement arms.

A computer-assisted surgery system for outputting at least one of a leg length discrepancy and an offset between a preoperative leg condition and a post-implant rejointing leg condition comprises instruments. An inertial sensor unit is connected to one of the instrument, the inertial sensor unit producing readings representative of its orientation. A computer-assisted surgery processor unit operating a surgical assistance procedure and comprises a coordinate system module for setting a pelvic coordinate system from readings of the at least one inertial sensor unit when the at least one instrument is in a given orientation relative to the pelvis, a tracking module for tracking an orientation of the at least one instrument relative to the pelvic coordinate system during movements thereof using the readings from the inertial sensor unit on the instrument, and a geometrical relation data module for recording preoperatively a medio-lateral orientation of the at least one instrument representative of a medio-lateral axis of the legs relative to the pelvic coordinate system and a distance between the legs along the medio-lateral axis, for recording after implant rejointing the medio-lateral orientation and said distance, and for calculating at least one of a leg length discrepancy and an offset, based on said distances and said medio-lateral orientations. An interface outputs at least the leg length discrepancy or the offset between the preoperative leg condition and the post-implant rejointing leg condition.

A computer-assisted surgery (CAS) system outputs a leg length discrepancy and/or an offset between conditions. An inertial sensor unit is connected to an instrument(s) to produce readings representative of its orientation. A CAS processor unit has a coordinate system module for setting a pelvic coordinate system from readings of the inertial sensor unit, a tracking module for tracking an orientation of the instrument(s) relative to the pelvic coordinate system during movements thereof, and a geometrical relation data module for recording preoperatively a medio-lateral orientation of the instrument(s) representative of a medio-lateral axis of the legs and a distance between the legs, for recording after implant rejointing the medio-lateral orientation and the distance, and for calculating a leg length discrepancy and/or an offset, based on the distances and the medio-lateral orientations. An interface outputs the leg length discrepancy and/or the offset between leg conditions.

Systems and methods for non-invasively determining a water content, a solute content, and a thickness of plant tissue are disclosed. A system includes a sensing device having a first piece and a second piece, where the first piece and the second piece are coupled together to form a clip. The system further includes a capacitive tissue sensor including a capacitor. The capacitor includes a plurality of coplanar conductive plates. The first piece and the second piece are biased in a closed position to provide a gripping force around the plant tissue such that at least a portion of the plant tissue contacts the plurality of coplanar conductive plates.