#None #Physik Instrumente #NanoPositioning #PZT Actuators

High Load Capacity Ring-Type PZT Actuators

In the realm of precision motion control and nanopositioning, PI (Physik Instrumente) has established itself as a prominent player, delivering cutting-edge technology that continues to enhance various applications. Recently, PI unveiled its advanced ring-type piezoelectric (PZT) actuators, ideally designed for scenarios that require rapid nanometer-scale movements while maintaining a clear and unobstructed central aperture.

The Advantage of PICA-Through PZT Actuators

What sets the PICA-Through PZT actuators apart from traditional piezo tubes is their unparalleled force and travel capabilities. While conventional linear piezo stack actuators and tube actuators have their advantages, the PICA-Through actuators provide significant improvements in both force capacity and travel range. Notably, the innovative design incorporates a through-hole, enabling seamless passage for optical beams, wires, sensors, and other essential components directly through the actuator. This design facilitates the implementation of compact, coaxial systems where motion is effectively generated around the optical or mechanical axis, optimizing the efficiency of such setups.

Versatile Applications in Multiple Fields

The open-center configuration of these actuators is incredibly beneficial in sectors such as photonics, microscopy, semiconductor manufacturing, medical technology, and metrology. Specific applications include:

• - Fiber Alignment: Ensures precision in the positioning of fibers for optimal transmission.
• - Optical Cavity Tuning: Allows for minute adjustments that are crucial in high-precision optical setups.
• - Objective and Lens Positioning: Enhances the accuracy in microscopy and imaging applications.
• - Laser Beam Delivery: Facilitates high precision in directing laser beams for various uses.
• - Microfluidic Control: Supports accurate control of fluids in micro-scale environments.
• - Adaptive Optics: Enables real-time adjustments to enhance image quality.

The versatility of these actuators makes them suitable for scientific instrumentation and numerous other high-tech applications.

Technical Specifications and Performance

The PICA actuator range features twelve standard variants that cater to various operational needs, built around three nominal outer diameters of 10, 16, and 25mm, with inner diameters scaled accordingly to 5, 8, and 16mm for precise adaptations. Key specifications include:

• - Travel Range: Up to 80 µm, allowing for fine adjustments in position.
• - Blocking Force: Up to 9,600 N, ensuring robust performance under substantial load.
• - Stiffness: Up to 580 N/µm, contributing to stability and reliability in dynamic situations.
• - Vacuum Compatibility: Variants that can operate effectively in vacuum conditions.

Understanding Piezoelectric Mechanisms

Piezoelectric actuators exploit the piezoelectric effect, converting electrical energy into mechanical energy. Upon the application of voltage, the piezoelectric ceramic material experiences slight expansion, enabling smooth and precise movement in direct correlation with the driving voltage. This technology can respond extremely quickly, achieving movements in the sub-millisecond range while maintaining resolution in the sub-nanometer scale.

Reliability and Longevity

PI's PICA ceramic technology stands out for its durability and performance consistency, even in demanding operational environments. Its design eliminates the need for gears, bearings, or other mechanical transmission parts, leading to high stiffness, rapid response, zero backlash, and no particle generation. Consequently, these actuators promise long operational lifespans, making them ideal for sustained use.

Applications in Industry

The compact design of ring-type actuators enables high forces to be generated within a minimal footprint, which can be easily integrated into flexure-guided mechanisms, OEM instruments, and automated production systems. By allowing optical, electrical, or fluidic components to be routed through the actuator, engineers can achieve greater mechanical stiffness, streamline cable and beam paths, and enhance the overall efficiency of precision motion assemblies.

As a pioneering force in nanopositioning technologies, PI continues to push boundaries, providing innovative solutions that cater to a variety of market demands, including those within additive manufacturing, laser tuning, precision mechanics, and more. The future is bright for high-load capacity ring-type PZT actuators, and their impact on technology is set to be profound.

For detailed specifications and further information, please visit PI Americas.