High-resolution position sensor for nanoscale measurements

Employing capacitance micrometry, the NX NanoSensor from Queensgate delivers sensitivity levels that are able to measure changes in position to an atomic scale. This state-of-the-art non-contact position measuring system relies on two sensor plates - a target and a probe - which between them form a parallel plate capacitor. Through the use of an appropriate electronic controller, the spacing of these two plates can be accurately ascertained. Among the key applications for the NX NanoSensor are stage feedback, vibration measurement, metrology, deformation measurements, precision manufacturing, drift measurement, precision beam steering and microscopy.

Via NX NanoSensor position can be determined to a margin of better than 7pm, with a linearity to 0.02 per cent and a bandwidth from 50Hz up to 10kHz. There is provision for the system to be tuned so that either the positional accuracy is improved or conversely the responsiveness to dynamic motion is heightened. Plate shapes that are round, square or rectangular can be selected. Active areas of 22.5mm2, 113mm2 and 282mm2 are offered. Working in tandem with the NX NanoSensor, the NS2000 controller module measures any changes in the parallel plate capacitance and subsequently produces an analogue voltage that is directly proportional to the difference in position of the target and a probe sensor plates.

The non-contact measurement and non-self-heating mechanism means that NX NanoSensor products do not impact the values they are measuring, thereby giving true nanoscale measurements. Furthermore, they use a non-hysteretic technique, which means the position is repeatable. Numerous material options can be used in their construction - Super-Invar, Zerdur, aluminium, stainless steel and ceramic - allowing thermal properties to be matched to the stability required by the specific application, in order to safeguard against position drift. Ultra high-vacuum, radiation hardened, non-magnetic and cryogenic variants can be specified.

For further information about the NX NanoSensor from Queensgate please go to www.nanopositioning.com.

Queensgate Instruments

Broers Building
JJ Thomson Avenue
Cambridge
CB3 0FA
UNITED KINGDOM

+44 (0)1223 371000

info@queensgate.com

www.queensgate.com

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