CFM Base Kit with trueNAV
Precision. Delivered. Spot On.
Using interferometric technology with external sensors integrated into our ultra-stable microscope housing, we surpass all existing cryogenic position encoder solutions. Our trueNAV system ensures outstanding repeatability across the entire travel range. Refer to our application measurements below for detailed insights on how this solution enhances sample motion precision in confocal applications.
Repeatability
Consistent and verified performance demonstrates a repeatability on single axis of over 95% within 50 nm across the full travel range, rather than a selective measurement at a single position. In 2D, the system achieves a bi-directional repeatability of typically 200 nm, which allows the user to accurately return to any specified point without requiring readjustments for confocal measurements with diffraction limited resolution.
Drift Compensation
Confocal spectroscopy often involves wide-range magnetic field sweeps, such as from –9 T to 9 T. Even with careful selection of materials like non-magnetic titanium, drifts of several micrometers may occur. These drifts can now be minimized with the help of trueNAV using an external closed-loop system.
Compensate for Runouts
Lateral runouts during z-axis focusing at the nanometer scale are addressed by the CFM base kit with trueNAV in closed-loop mode, which maintains accurate focus on the POI. By using an external interferometer to measure and control the sample holder’s position, trueNAV is reducing crosstalk and correcting axis errors that traditionally integrated sensors cannot even detect.
Versatile Control via AMC300
Manage the motion through an intuitive WebApp interface or streamline your measurement procedures by utilizing the available API for automation.
Performance Measurements
Repeatability
5 nm (+-1Sigma) over full travel range
Repeatability
Standardized testing conducted in accordance with NIST/ASME protocols indicates a unidirectional repeatability of 5 nm (±1 Sigma) over a 4 mm travel distance. For bidirectional repeatability across the entire travel range, results demonstrate deviations consistently under 50 nm at a 95% confidence interval (assessed along a single axis at the mirror position).
Such precision enables accurate repositioning to any target, like a single emitter, without the need for readjustments.
The included video showcases the successful retrieval of a feature on ten occasions after shifting 1 mm along both the x and y axes. The optical data reveals only minimal variation of a few pixels between consecutive images, which corresponds to 200 nm.
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Compensated Drifts
minimize magnetic field drifts
Compensated Drifts
Changing magnetic fields often cause the sample to drift under the microscope optics, especially during field sweeps from -9 T to +9 T. These drifts - typically several micrometers - require frequent manual realignment, disrupting workflows and consuming valuable time.
trueNAV actively compensates for these shifts, reducing drift to just a few pixels. This ensures stable imaging across all field conditions, significantly improving efficiency and ease of use. The video shows a compensated full sweep from -9 T to 0 T to +9 T.
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Proven Performance over Entire Range
standardized test procedures
Proven Performance over Entire Range
Accurate and dependable positioning performance cannot be confirmed by a single measurement. During the research and development phase, attocube applied automated, well-defined, and systematic testing procedures in accordance with ASME standard (B5.64), collecting thousands of data points to validate the single-axis performance of the trueNAV readout (see first graph to the left).
These extensive tests ensure robust specifications and a thorough evaluation of true capabilities across the full travel range for key performance metrics such as repeatability and noise/jitter.
For ongoing quality control, attocube relies on application-specific testing using a complete microscopy setup and calibrated samples to verify real 2D repeatability in an application-centered setting (see second graph at left/bottom for typical result). This practical approach provides meaningful insights into real-world performance and user experience, while maintaining the high standards established during initial validation.
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