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  1. Aerotech
12 December 2017

XYZ Piezo Stages for Exceptional 3D Positioning Accuracy

Aerotech´s QNP3 series XYZ piezo positioning stages combine sub-nanometer resolution, high dynamics, and excellent geometric performance in a compact three-degree-of-freedom (DoF) package.

They come with a 40mm x 40mm clear aperture with closed-loop travels up to 100µm x 100µm x 10µm (open-loop travels to 120µm x 120µm x 12µm). The design is ideal for optical and scanning probe microscopy or other inspection or manufacturing applications where two-sided part access is required with three depth-of-field (DoF) manipulation.

Precision parallel-kinematic design

QNP3 piezo stages use a finite element analysis (FEA) optimised precision parallel-kinematic flexure and metrology design to ensure superior multi-axis accuracy, high stiffness, and long device life.

High stiffness and resonant frequency enable high process throughput and fast closed-loop response.

The patent-pending drive design minimizes X and Y yaw errors while still maintaining an Abbe-compliant metrology system. This design results in unmatched positioning performance over the entire XY travel space.

Z-axis actuators and capacitive sensors are designed to provide Abbe-compliant feedback in the vertical direction with minimal geometric errors.

Sub-nanometer performance

QNP3 stages are available with closed or open-loop feedback. The unique capacitive sensor parallel-metrology design directly measures the output of the positioning carriage, delivering sub-nanometer resolution, linearity errors better than 0.01%, and single-digit nanometer repeatability.

Ultra-precision control

When coupled with Aerotech´s Q-series controllers and drives, QNP3 stages demonstrate sub-nanometer positioning resolution and in-position stability (jitter) while maintaining high positioning bandwidth.

Advanced software options, such as Dynamic Controls Toolbox and Motion Designer, provide a variety of highly-effective, easy-to-use tools including Iterative Learning Control, Harmonic Cancellation, and Command Shaping, providing improved tracking errors and faster step-and-settle times. OEM drive options are also available.

Design options

An optional mounting plate provides direct mounting to English or metric breadboard optical tables. A solid tabletop is also offered. QNP3 piezo stages are available in custom materials, and in vacuum-prepared versions, upon request.

Advancements in core technologies such as electronics, software, and imaging have continued to drive the development of new medical devices and diagnostic procedures.
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