News | November 3, 2015

PI's New Faster, Larger Tip/Tilt Piezo Beam Steering Mirrors

Source: PI (Physik Instrumente) LP
PI's New Faster, Larger Tip/Tilt Piezo Beam Steering Mirrors

PI (Physik Instrumente) L.P., a leader in the field of precision motion systems and solutions, recently released the S-331 fast tip/tilt 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.

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%.

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Read About Steering Mirrors

Specifications, Datasheet, More Information

Applications of Steering Mirror Technology
Applications include image processing, image stabilization, laser beam steering, microscopy, materials processing, lithography, optical filters, optical switches.

Features & Advantages

  • 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

Source: PI (Physik Instrumente)