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The PFM-50C actuator/fiber housing is 90 x 90 x 50 millimeters and uses a piezoelectric ceramic cylinder to
stretch or compress fiber coils and change their optical path length. The electronic drive and control board
is 100 x 125 x 40 mm and generates the high voltage needed to energize the piezoelectric actuator, so no external
high voltage power supply is required. Strain gage feedback minimizes hysteresis and linearity errors. Multiple
PFM modules can be configured so that path length changes add together.
PFM-50C Performance Highlights
Long path length changes are achieved with less total fiber. Using SFM-28 fiber (250 micrometer
diameter), stretch of 4.5 mm is produced using only 10 m of fiber. Other fiber types can also be
installed. NST achieves this industry-leading rate of stretch by:
- Using a more responsive piezoelectric ceramic actuator
- Optimizing the fiber-to-ceramic bonds with a single winding layer
- Maximizing the driving voltage
An additional feature is that both “Push” and “Pull” movement is achieved on the entire length of fiber without
pre-stress. This proprietary design is easily customized to achieve more or less movement, depending on the customer’s
requirements.
Fast scanning speed and bandwidth are achieved without moving parts. The solid-state piezoelectric actuator/fiber
coil assembly has a theoretical response greater than 10 kHz. Scanning speeds from 100 to 1000 Hz are typical,
depending on sensor bandwidth, drive amplitude, and input power and heat dissipation constraints. To achieve faster
scans the electronics can be scaled to produce greater power and quicker response.
Precise scanning speed control is achieved using advanced piezoelectric drive methods. Better than two percent
linearity is possible using feed-forward waveform shaping and closed-loop strain gage feedback.
A separate high-voltage power supply is not required. The drive and control board includes a DC to DC converter
that requires only 12 V on the input to produce an output of 1200 V. All high voltage components and leads are safely
managed inside the PFM module and not present in the rest of the instrument chassis.
For more information please contact:
Fred Haas, Sales Manager, New Scale Technologies, Inc.
Phone 585-924-4450, FAX 585-924-4468
FHaas@newscaletech.com
www.newscaletech.com
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