MCL Think Nano Nano-Theta/H High-Precision Closed-Loop Rotational Nanopositioning Stage
| Brand | MCL Think Nano |
|---|---|
| Origin | USA |
| Model | Nano-Theta/H |
| Product Type | Motorized Rotational Positioning Stage |
| Motion Range | ±2.5 mrad (total 5 mrad) |
| Resolution | 10 nrad |
| Repeatability | <20 nrad |
| Resonant Frequency (unloaded) | 300 Hz ±20% |
| Max Horizontal Load | 0.5 kg |
| Max Vertical Load | 0.2 kg |
| Body Materials | Aluminum, Invar, or Titanium |
| Control | Closed-loop via integrated PicoQ® capacitive sensors |
| Controller | Nano-Drive® |
Overview
The MCL Think Nano Nano-Theta/H is a high-precision, closed-loop rotational nanopositioning stage engineered for sub-microradian angular control in demanding optical and photonics applications. Based on a monolithic flexure design with piezoelectric actuation and proprietary PicoQ® capacitive position sensing, the stage delivers absolute, drift-free angular positioning over a total range of 5 milliradians (±2.5 mrad). Its large central aperture—standard across all configurations—enables unobstructed optical throughput, making it ideal for beam steering, interferometric alignment, and in-line optical path integration. Unlike traditional goniometers or stepper-motor-based rotators, the Nano-Theta/H operates without backlash, hysteresis, or mechanical wear, ensuring long-term stability and metrological traceability in laboratory and industrial R&D environments.
Key Features
- True closed-loop operation with integrated PicoQ® capacitive sensors providing absolute position feedback at 10 nrad resolution
- Monolithic flexure architecture eliminating friction, stiction, and gear-related artifacts
- Large central aperture (standard Ø12.7 mm, customizable up to Ø25.4 mm) supporting collimated beams, fiber coupling, and multi-wavelength optics
- Multi-orientation mounting capability—fully functional in horizontal, vertical, or inverted configurations without performance degradation
- High dynamic response with unloaded resonant frequency of 300 Hz ±20%, enabling rapid settling (<5 ms typical) for time-sensitive alignment sequences
- Material options include lightweight aluminum (for speed), low-thermal-expansion Invar (for thermal stability), and biocompatible titanium (for vacuum or cleanroom use)
Sample Compatibility & Compliance
The Nano-Theta/H is compatible with standard optical tables, kinematic mounts, and modular multi-axis platforms such as the Nano-Align6 Series. It supports direct integration with vacuum-compatible flanges (CF-16/CF-35 upon request) and operates reliably in ambient, dry nitrogen, or Class 100 cleanroom environments. While not certified to a specific ISO or ASTM standard by default, its closed-loop architecture and traceable calibration methodology align with GLP-compliant instrumentation requirements. When paired with Nano-Drive® controllers configured for audit trail logging, the system meets foundational criteria for FDA 21 CFR Part 11 compliance in regulated photonic device manufacturing and characterization workflows.
Software & Data Management
Control is enabled through the Nano-Drive® platform, offering native support for Windows/Linux via USB 2.0 and Ethernet interfaces. The SDK provides C/C++, Python, MATLAB, and LabVIEW APIs—including full access to real-time sensor data, trajectory planning, and user-defined PID tuning. All position commands and sensor readings are timestamped with microsecond precision. Optional firmware upgrades enable synchronized multi-axis motion profiles and external trigger input/output (TTL-compatible), facilitating integration into automated optical testing stations. Raw position logs can be exported in CSV or HDF5 format for post-acquisition analysis in third-party tools such as OriginLab or Python-based SciPy pipelines.
Applications
- Precision optical alignment in free-space quantum optics setups, including cavity mirror tilt optimization and single-photon source coupling
- Fiber Bragg grating (FBG) inscription systems requiring sub-arcsecond angular repeatability during phase mask scanning
- Polarization-resolved microscopy and ellipsometry where controlled sample rotation must maintain beam collimation and polarization purity
- Nanoscale lithography tooling, especially in maskless direct-write systems using focused ion or electron beams
- Calibration reference stages for angular metrology labs validating autocollimators, electronic levels, or laser interferometer angle encoders
FAQ
What is the difference between open-loop and closed-loop operation on the Nano-Theta/H?
The stage operates exclusively in closed-loop mode using integrated PicoQ® sensors; no open-loop configuration is available or recommended due to inherent piezoelectric nonlinearity.
Can the Nano-Theta/H be used in ultra-high vacuum (UHV) environments?
Standard units are rated for high vacuum (10⁻⁷ Torr); UHV-compatible variants with non-outgassing materials and bakeable cabling are available upon engineering consultation.
Is thermal drift compensated in real time?
While the stage does not include active thermal compensation, Invar-body models exhibit 80% versus ambient fluctuations.
How is calibration traceability established?
Each unit ships with a factory calibration certificate referencing NIST-traceable autocollimator measurements; users may perform in-situ recalibration using interferometric angular references per ISO 230-1 Annex B.
Does the Nano-Drive® controller support scripting for batch alignment routines?
Yes—Python scripts can define sequential angular sweeps, dwell times, and conditional logic based on external detector signals (e.g., photodiode current thresholds).
