HEXAPODS | FEATURE
The results obtained with the simulation model thus contribute to a better evaluation of orthodontic processes in the oral cavity and a more effective design of corrective measures. Similar results can also be achieved in other areas, for example in dental and hip implants or the like, using suitable test setups. Thanks to the versatility and large number of variants of parallel-kinematic Hexapods, industrial applications are also possible.
Physik Instrumente (PI)
www.pi.ws
Ultraprecise Measurement System for Optical Surfaces Mould inserts used for manufacturing optical lenses place extreme demands on the accuracy of the test methods. Interferometric measuring equipment can now be used to automate these requirements and integrate them directly into production. Here, too, high-precision Hexapods have found a typical area of application: for optimum measurement of both plane as well as spherical and aspherical test specimens, the positioning of the interferometer requires five degrees of freedom: the interferometer must travel in the direction of the x, y and z axes. For orientation perpendicular to the test axis, additional rotation around the x and y axes and, in the case of cylindrical lenses, also around the z axis is required. The Hexapod that is in charge of positioning tasks is mounted on 20-mm thick aluminum plate. The interferometer located inside the Hexapod does not interfere with its motion. The CCD camera takes the picture. It is digitised, saved in the computer and evaluated. A control program written in MatLab sends suitable control commands to the Hexapod.
<< Figure 3: Ultraprecise measurement system for
optical surfaces. In this application, too, Hexapods are the method of choice (image: PI / Fraunhofer Institute for Production Technology IPT). >>
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WWW.SILEXMICROSYSTEMS.COM 37 | commercial micro manufacturing international Vol 7 No.4
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