Accuracy of 20nm pp is available at full range, thus enabling 3-D scans of quality. Settling time for a 2μm step is 10ms allowing z-stacks which are only limited by the speed of the camera. A voice coil drive works similar to a dynamic loudspeaker where the coil is moving the membrane of the speaker.
Simply speaking: In TILL's VoiceCoil the membrane is replaced by the microscope objective. Here, however, a very precise optical position measurement system with a closed loop feedback ensures nm precise position control of the objective.
The VoiceCoil z-drive will be used in TILL's digital microscope iMIC.
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Imaging & Microscopy Issue 4 , 2012 as free epaper or pdf download