Home Products Applications Catalog Custom/OEM Technical Information News International Sales Repairs Contact

PicoQ® Sensor Technology
Ultra-low Position Noise
Outstanding Accuracy
Extended Cables without Performance Loss
>>No Performance Loss in Vacuum

Additional Information
Measuring Atomic Steps
Sub-Nanometer Motion
Measuring Surface Roughness
High Resolution Sensors
Nanopositioning Accuracy

Questions?
E-Mail Us




No Performance Loss in Vacuum


Capacitive sensors have a problem in vacuum. Capacitive sensor performance degrades with added cable length (in air or vacuum), with 60% increased position noise for every meter of UHV cable added. This problem limits the versatility of any nanopositioner that contains a capacitive sensor, and can be a major drawback for both research and OEM applications. PicoQ® sensor technology, used exclusively by Mad City Labs, is not affected by cable length and has no performance loss in vacuum. Mad City Labs nanopositioning systems can have custom UHV cable lengths and air side cables can easily be extended by adding standard, well-shielded extension cables without performance loss. Mad City Labs nanopositioning systems with PicoQ® sensor technology also do not require costly signal conditioning boxes.

The following measurement confirms that nanopositioning systems with PicoQ® sensor technology maintain low position noise after the addition of UHV cables. In the experiment, the position noise of the nanopositioning system was measured with the standard cable length of 6 feet [1.8 m]. Noise measurements were repeated after adding 18 foot [5.5 m] UHV compatible cables. The difference between the measurements at different cable lengths was negligible, showing that UHV cables and cable length do not affect the performance of nanopositoining systems with PicoQ® sensor technology.

position noise spectrum of 200um nanopositioning system with various cable lengths

Position noise spectrum of a 200 micron range nanopositioning system with PicoQ® sensors. Two experiments were performed with the standard cable length of 6 ft [1.8 m] and with 18 ft [5.5 m]UHV compatible cables.
mclgen@madcitylabs.com       phone: 608.298.0855       fax: 608.298.9525

Copyright © 2015