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E-616 Piezo Controller
Sep 2009
PI (Physik Instrumente) L.P., Air Bearings and Piezo Precision MotionRequest Info
AUBURN, Mass., Sept. 14, 2009 – PI (Physik Instrumente) LP has extended its E-616 multichannel controller line for piezo-based steering and stabilization mirror platforms. Four open- and closed-loop models are now available in benchtop and OEM module versions. The closed-loop units contain two servo controllers, sensor circuit channels and three power amplifiers that provide up to 10 W of peak power.

Internal coordinate transformation simplifies control of parallel kinematics designs (tripod and differential drive).

PI-E-616.jpgPiezo steering mirrors are faster than galvo mirror scanners and provide better resolution and stability due to their high-stiffness, solid-state piezo drives. They are used to steer or stabilize beams or to enhance image resolution. Applications include optical communications, astronomy, super-resolution microscopy and nanolithography.

The controllers can drive parallel-kinematics steering mirror designs. With the tripod design (for S-325 Z/tip/tilt mirrors), the platform is driven by three piezo actuators at 120° spacing. The quadra-pod differential drive design (as used in the S-330 and S-334 mirror models) runs two orthogonal axes with a fixed pivot point based on two pairs of actuators operating in push/pull-mode. The company says that the differential evaluation of two sensors per axis improves linearity, stability and resolution.

Parallel kinematics requires transformation of the commanded tilt angles into the corresponding linear motion of the individual actuators. In the E-616, this is taken care of by an integrated circuit, eliminating the need for additional external hardware or software. In the tripod version, all actuators can be commanded by an offset-voltage simultaneously, resulting in a vertical movement, for example for optical path length tuning.

To facilitate integration, setup and operation the controller features both front and rear panel connections: The 25 pin sub-D piezo and sensor connector is located on the front, along with offset trim pots and LEDs for power and overflow. A 32-pin rear connector enables commanding and reading of the sensor and amplifier monitor outputs.

For more information, visit:  

PI (Physik Instrumente) LP
16 Albert St.
Auburn, MA 01501
Phone: (508) 832-3456
Fax: (508) 832-0506


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The scientific observation of celestial radiation that has reached the vicinity of Earth, and the interpretation of these observations to determine the characteristics of the extraterrestrial bodies and phenomena that have emitted the radiation.
optical communications
The transmission and reception of information by optical devices and sensors.
The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
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