Piezo Actuators for Precision Motion Control

Did You Know?

Did you know that many piezo actuators exhibit sub-nanometer resolution and can achieve step sizes on the order of 0.1 nm, even though their total stroke may only be tens to hundreds of micrometers? This extreme precision comes from the inverse piezoelectric effect, where an applied electric field induces a nearly instantaneous crystal lattice strain—typically around 0.1% of the material’s length—allowing microsecond response times that are orders of magnitude faster than stepper or DC motors. A common misconception is that piezos are always hysteresis-limited; in practice, closed-loop systems with strain gauge or capacitive feedback can reduce positioning nonlinearity and hysteresis to below 0.1%.
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Frequently Asked Questions

A piezo actuator is a motion device that converts electrical voltage into precise mechanical displacement using the inverse piezoelectric effect. When a voltage is applied across a piezoelectric ceramic stack or element, the crystal lattice deforms on the order of nanometers to tens of micrometers, enabling high-resolution linear or flexural motion with very fast response times. The motion is typically non-magnetic, frictionless in the material itself, and provides high stiffness and blocking force over a small stroke.

What are Piezo Actuators?

Piezo actuators are compact motion devices that convert electrical voltage into precise mechanical displacement using the piezoelectric effect. They deliver nanometer to sub-nanometer resolution, high stiffness, and very fast response times, making piezo actuators well suited for high‑precision positioning tasks in optics and photonics.

Common constructions include stack piezo actuators (multilayer ceramics for high force and micrometer stroke), shear actuators, tube actuators, and flexure‑guided piezo stages that transform small piezo strokes into longer, highly linear motion.

Typical Specifications and Performance

Key parameters for piezo actuators include:

  • Travel range: From a few micrometers up to around 100–300 µm for direct stacks; larger when coupled to flexure or lever mechanisms.
  • Blocked force: Often in the tens to thousands of newtons, depending on stack cross‑section and length.
  • Resolution and repeatability: Nanometer or better when driven with low‑noise controllers and closed‑loop feedback (strain gauges, capacitive sensors, or LVDTs).
  • Drive voltage: Typically 0–100 V, 0–150 V, or 0–200 V for multilayer piezo actuators; some legacy devices use up to 1 kV.
  • Resonant frequency: From a few kHz to >50 kHz, important for dynamic applications and scanning.
  • Capacitance and power dissipation: Define driver requirements and bandwidth limits.

Use Cases in Optics and Photonics

Piezo actuators are widely used for mirror tip/tilt control, fast focus in microscopy, interferometer arm positioning, fiber alignment, micro‑scanning in imaging systems, and precision adjustment in laser cavities and beam steering assemblies. Their combination of stiffness and speed also supports vibration cancellation and nanomanipulation tasks.

Buyer Guidance on FindLight

When sourcing piezo actuators on FindLight, compare travel range, force, resonant frequency, and integrated feedback options against your load, bandwidth, and stability requirements. Check mounting style, preload instructions, compatible drivers, and environmental limits (vacuum, temperature, humidity). Use datasheets to match actuator capacitance and voltage range to your existing piezo drivers or motion controllers.

On each piezo actuators product listing you can review detailed specifications, then request quotes directly from manufacturers and distributors. No registration is required to submit RFQs, enabling fast comparison of technical offers, lead times, and pricing for your motion control project.