M2 Galvanometer

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Neptec engineers considered a number of galvanometers and selected General Scanning's M2 model over alternative technologies. This galvo uses moving-magnet technology to provide high torque while consuming relatively little power. These features were critical because of the large inertial loads as well as the power constraints in space-flight applications."It looked like the M2 would meet the needs of the application so we put it through our launch qualification process," Christie said. "First we put it on a vibration table at David Florida Labs and shook it to simulate the vibrational bending loads experienced during launch.Then we tested the device to make sure that it would still meet our accuracy requirements. Not only did the M2 galvo meet NASA's vibration specification, our tests showed it was pretty much indestructible. We shook it to the limits of our equipment and it passed with flying colors."In conventional earthbound applications, when the M2 galvo is used with General Scanning's innovative servo-driver, it can achieve high bandwidth, fast mirror settling, and low drift. As a result, it offers optical repeatability to 5 microradians, nonlinearity as low as 0.1% over its range of rotation, plus low thermal drift, wobble, and jitter.

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