(Nanowerk News) PI (Physik Instrumente) L.P., a leader in the field of precision motion systems and solutions, recently released the S-331 fast tip/tip platform, the newest piezo steering mirrors in PI’s portfolio. With milli-second response and settling time and high dynamic linearity, these fast tip/tilt platforms are ideal for precision optics applications in ambient and vacuum environments.
2-Axis, Frictionless Guiding, No Polarization Rotation
S-331 steering mirror platforms provide precise angular tip/tilt motion of the top platform around two orthogonal axes. These flexure-guided, electro-ceramic driven systems can provide higher accelerations than other actuators, enabling step response times in the sub-millisecond range, with frictionless backlash-free motion.
The single pivot-point design also prevents the drawback of polarization rotation, which is common with conventional 2-axis stacked systems, e.g. galvo scanners. With a tip/tilt angle up to 5 mrad and optical deflection angle up to 10 mrad, these platforms are ideal for compact mirrors up to ½ inch in diameter.
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Parallel-Kinematics: Smaller with Improved Stability, Linearity & Dynamics
PI piezo steering mirrors are based on a parallel-kinematics design with coplanar rotational axes and a single moving platform driven by two pairs of differential actuators. The advantage is jitter-free, multi-axis motion with excellent temperature stability. Compared to stacked (two-stage) mirror scanners, the parallel-kinematics design provides symmetrical dynamic performance in both axes with faster response and better linearity in a smaller package.
Temperature Stability, Out of This World Reliability
The steering mirrors high performance drives are powered by 100% ceramic insultated actuators that have a long lifetime, and are not sensitive to humidity or high operating temperatures. In fact, the proprietary design of the actuators was lifetime tested by NASA/JPL for space use, qualified by delivering 100 billion cycles of failure-free motion, and were part of the Mars Curiosity Rover. Excellent temperature stability is managed in the closed-loop version by metal foil strain gauge sensors that allow fast, exact linear motion with very small linearity deviations of 0.1%.
Fast Step and Settle: Full Travel Move in 1.8 msec (1% accuracy); 0.8 msec (Rise Time)
High Dynamics: Up to 10 kHz Resonant Frequency
Vacuum Compatible Versions
Tip/Tilt Angle up to 5 mrad, Optical Deflection Angle up to 10 mrad (0.57°)
Parallel Kinematic Design: Single Pivot Point
Closed-Loop for High Linearity
PI is a leading manufacturer of precision motion control equipment, piezo motors, air bearing stages and hexapod parallel-kinematics for semiconductor applications, photonics, bio-nano-technology and medical engineering. PI has been developing and manufacturing standard & custom precision products with piezoceramic and electromagnetic drives for 4 decades. The company has been ISO 9001 certified since 1994 and provides innovative, high-quality solutions for OEM and research. PI is present worldwide with eleven subsidiaries, R&D / engineering on 3 continents, and total staff of 800+.