Life-saving stents – Tested quality with Werth multi-sensor coordinate metrology
The special configuration of the optical-tactile 3D coordinate measuring machine with special illumination unit and rotary/tilt axis enables highly accurate and fast complete measurement of stents. With the help of the rotary axis, special recording mandrels and the patented Raster Scanning HD ROTARY function, the cylinder jacket surfaces are scanned in sections or completely with the image processing sensor during rotation and made available for evaluation as a 2D image or 3D data record in the shortest possible time.
• Micrometre-precise and fully automatic optical measurement of hundreds of geometrical characteristics such as strut widths, radii and angles in a few tens of seconds
• Automatic evaluation with regard to defective structures with the powerful image processing system
• Special software tools prevent faulty measurements, such as those caused by webs that deviate greatly from the target geometry or by contamination
• The tilt axis extends the range of application to the measurement of conical and other non-cylindrical geometries, such as heart valve stents
• Thanks to the 3D measurement, spatial geometry elements can be captured (e.g. flare angle)
• The multi-sensor concept and the WinWerth® 3D measurement software enable tactile measurements, for example to determine the strut width, exactly at the positions of the stent previously determined with image processing
Accuracy
Permissible length measurement error up to 1.5 µm