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QS-3 OPD Galvanometer Scanner

Small and Powerful

Perfect for Hand-Held Applications


The QS-3 OPD Nutfield Tech's QS-3 OPD GalvanometerGalvanometer is lightweight and extremely compact. Our moving magnet scanners are ideal for hand-held scanning applications. Our mechanical design incorporates our exclusive ceramic ball-bearing motors that are combined with our high output position detectors.  Patented low inertia optical detectors achieve dynamic performance with faster, more accurate positioning. When integrated with Nutfield’s QD-4000 Servo Amplifier, the QS-3 OPD scanners deliver accuracy and speed in the palm of your hand.

Nutfield Tech’s QS-3 OPD Galvanometer’s recommended aperture range is 3mm to 5mm. Minimum rotor inertia provides increased bandwidth and speed for stable, reliable performance.

Contact Nutfield Tech for assistance with identifying a solution for your scanning applications.


Key features of the QS-3 OPD Galvanometer Scanner:

3mm and 5mm apertures
200 µs Step Response with 3mm aperture mirror; 250 µs with 5mm aperture mirror
Lightweight, smaller and faster than standard galvos
Low drift – 50ppm
High Linearity – 99.8%
High Resolution
Excellent RF noise immunity
Available as galvanometer, single-axis scanner or XY Scan Set


Specifications for the QS-3 OPD Galvanometer Scanner:

Rotor Inertia0.0140 gm-cm²
Torque Constant12,000 dyne-cm
Coil Resistance1.8 ohm
Coil Inductance (@ 1kHz)26 µh
Weight (without cable)19.6 g
Inertial Load:
Recommended0.01 gm-cm²
Maximum0.04 gm-cm²
Position Detector:
Linearity*>99.8% @ ±20°
Gain Drift50 ppm/°C
Offset Drift15 µrad/°C
Repeatability10 µrad
Typical output signal:
Differential mode14.5 µA/°
Common mode151 µA
Supply current15 - 20 mA
* For larger angles, contact Nutfield Tech.
Dynamic Performance:
Step Response Time
(1% of full scale, 99% settled)
3mm X Mirror200 µs
5mm X Mirror250 µs
Cable lengths available:7" to 24" (0.18m to 0.61m)
Storage Temperature:10 to 50°C
Operating Temperature:0 to 40°C noncondensing
All specifications are using Nutfield Tech's QD-4000 Servo Amplifier.
Specifications subject to change without notice.


Use the QS-3 OPD Galvanometer Scanner to support the following applications:

Optical Coherence Tomography (OTC)
Biomedical Imaging
High Speed Scanning
Laser Light Show and Projection
Dental Ablation


Accessories available for the QS-3 OPD Galvanometer Scanner:

Cables – available lengths 7″ to 24″ (0.0178m to 0.610m)
QD-4000 Servo Amplifier
Connector options are available; contact Nutfield Technology for more information.


Documentation for the QS-3 OPD Galvanometer Scanner:

Nutfield Technology’s OPD Galvanometer Scanners Data Sheet
Nutfield Technology’s QD-4000 Servo Amplifier Data Sheet

U.S. patents apply to this product. For details, visit our Virtual Patent Marking page.