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Publication Date: 03/1/2008
Archive >  March 2008 Issue >  New Products > 

PI Adds Piezo Beam Steering Mirror Platforms
Steering mirror platforms.
Auburn, MA — PI (Physik Instrumente) L.P. has extended the S-330 high-dynamics piezo tip/tilt platform family with several new large-angle models. These additions include six closed loop and open loop models for mirrors up to 50mm diameter providing optical beam deflection to 20 mrad (>1x) and have >3kHz resonant frequency for sub-millisecond step response.

According to the company, the platforms have a resolution to 20 nrad with excellent position stability. They incorporate parallel-kinematics design for higher dynamics, stability and linearity, while closed-loop versions offer better linearity.

Typical applications include beam correction, laser surgery, image stabilization, interlacing, dithering, laser scanning/beam steering, optical communications, and high resolution microscopy/spectroscopy. The steering mirror platforms provide precise angular tip/tilt motion of the top platform around two orthogonal axes. These flexure-guided, piezoelectrically driven systems can provide higher accelerations than other actuators, enabling step response times in the sub-millisecond range.

The single pivot-point design also prevents the drawback of polarization rotation, which is common with conventional 2-axis stacked systems, such as galvo scanners.

Closed-loop and open-loop versions with 3 different tilt ranges up to 10 mrad (20 mrad optical deflection) are available.

For more information, contact: Physik Instrumente L.P., 16 Albert St., Auburn, MA 01501 508-832-3456 fax: 508-832-0506 E-mail: Web:

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