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Piezo Controller offers optical path control, beam steering.

Press Release Summary:

Intended for piezo-based steering and stabilization mirror platforms, E-616 multi-axis controllers are offered in 4 open and closed-loop models as bench-top and OEM module versions. Closed-loop units contain 2 servo controllers, sensor circuit channels, and 3 power amplifiers that provide up to 10 W peak power. Internal coordinate transformation simplifies control of parallel kinematics designs, while front and rear panel connections facilitate integration, setup, and operation.

Original Press Release:

Optical Path Control, Beam Steering & Image Stabilization with Lower Cost Piezo Controller

Auburn, MA, Piezo system specialist PI has extended its E-616 multi-channel controller line for piezo based steering & stabilization mirror platforms. Four open and closed-loop models are now available in bench-top and OEM module versions. The closed-loop units contain two servo controllers, sensor circuit channels and 3 power amplifiers.

Features and Advantages of the E-616 Multi-Axis Controller
  • Three Integrated Amplifiers Provide up to 10 W Peak Power
  • Closed-Loop and Open-Loop Versions
  • Bench-Top and OEM Modules
  • Internal Coordinate Transformation Simplifies Control of Parallel Kinematics Designs (Tripod & Differential Drive)

    High Resolution Image:

    Piezo Steering Mirrors: Why?
    Piezo steering mirrors are faster than galvo mirror scanners and provide improved resolution and stability due to their high-stiffness, solid-state piezo drives. They are used to steer or stabilize beams or enhance image resolution. Applications range from optical commumication, astronomy and super-resolution microscopy to nano-lithography.

    Tripod and Quadra-Pod Differential Drive Versions
    The controllers can drive parallel-kinematics (highest performance mechanics, where all piezo actuators are connected to the same moving platform) 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, or 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 differential evaluation of two sensors per axis improves linearity, stability and resolution.

    Internal Coordinate Transformation Simplifies Control
    Parallel-kinematics requires the 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 of additional external hardware or software. Additionally, with the E-616.S0 tripod version, all actuators can be commanded by an offset-voltage simultaneously. As a result, a vertical movement, for example for optical path length tuning, is obtained.

    Simple Setup and Operation
    To facilitate integration, setup and operation the E-616 features both front and rear panel connections: The 25 pin sub-D piezo & sensor connector is located on the front, along with offset trim pots and LEDs for Power and Overflow. A 32-pin rear connector allows commanding and reading the sensor and amplifier monitor outputs.

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