3D Optical Inspection by DHM® is a unique 3D imaging solution compatible with production environment. DHM® allows optical inspection of 3D topography, surface finish, defect detection of moving samples at high throughput on production floors, in presence of environmental noise and vibration.
High throughput measurement is possible with DHM® unique non-scanning technology. DHM® high acquisition rate enables measurement of a large quantity of samples and products directly on the production line. DHM® short acquisition time makes the system robust against vibrations.
DHM® is a reliable system with low maintenance costs since there is no complex scanning mechanism inside the microscope. DHM® intrinsic vertical calibration makes the vertical measurement accurate over time.
Depending on user needs, DHM® are mount on a standard column or integrated on user’s infrastructure (conveyor tray, gantry). Such system is usually customized and dedicated to a specific inspection. DHM® can be controlled by the TCP/IP software module enabling control of all the acquisition and analysis function of DHM®.
3D optical inspection by LyncéeTec exploits the strength of digital holography to offer the first instrument performing 3D measurement and compatible with industrial throughput.
2D inspection systems are widely used for industrial inspection. They offer high measurement rates over a large field of view but the drawback is that they do not record topography information, but only intensity and color information.
From the hologram, DHM® provides phase and intensity information. The phase can be interpreted to obtain surface topography, surface finish parameters or characterization of transparent layers that cannot be observed with 2D systems.
|Features||DHM®||2D inspection System|
Scanning Technology as Laser Scanning Confocal Microscopy (LSCM) or White Light Interferometer (WLI) have a low measurement rate and are sensitive to vibrations. DHM® overcomes these limitations.
|Intrinsic vertical calibration|
|Robust against vibrations|
For industrial 3D optical inspection, the first system installed by Lyncée Tec was dedicated to quality control in the watch industry. An important step has been achieved in 2010 by demonstrating measurement on a convey tray, i.e measurements without stopping the sample, and without any mechanical adjustment of the height of the sample for focalization.
DHM® is currently used for 3D optical inspection in semiconductor, medical technology, watch, and solar industries, for controlling among others the following features: