- About Us
- Career Center
- Nano-Social Network
- Nano Consulting
- My Account
A novel miniature linear motor actuator based on the Piezo Walk principle with a highly dynamic sweep mode combines long travel ranges to 20 mm and speeds to 10 mm/sec with sub-nanometer resolution and sub-millisecond response to enable continuous tuning and wavelength sweeps of lasers and monochromators.
Precision Actuators: Key Components in Tunable Lasers & Spectrophotometers
Many of today's tunable lasers rely on the performance of a micropositioning or nanopositioning actuator to position a diffraction grating with extreme precision and repeatability. While the virtually unlimited resolution and extremely fast response of piezo stack actuators is very desirable in these applications, their limited travel (typically <100 µm) is often a K.O. criterion. To overcome the limited range, DC-motorized micrometers and stepper-motor-driven leadscrew actuators have been employed by laser manufacturers in the past.
However, these systems cannot provide the ultra-smooth piezo-class motion required for wavelength sweeps. Their precision is also affected by friction and backlash of the mechanical drive screw and their limited dynamic performance leaves laser designers wanting.
Novel Ceramic Linear Drive Overcomes Limitations of Classical Actuators
A novel, ultra-compact linear drive based on the PiezoWalk® principle has been developed by PI to overcome the limitations of conventional linear actuators. The system, dubbed NEXACT®, combines virtually unlimited travel ranges with high stiffness and bandwidth in a very small package. Furthermore, NEXACT® actuators provide piezo-class resolution (far below one nanometer) and millisecond response. The special drive design works with a very low operating voltage of 40 V and below.
PiezoWalk® Principle: High Bandwidth & Resolution, Sweep Mode, No Friction or Drift
In operation, piezoceramic bending elements act on the ceramic runner, which is connected to the moving part of the application. The length of the runner determines the travel range. Force capacity, resolution and velocity are determined by the piezo geometry and drive electronics, and are scalable. To move the runner over longer distances the stepping mode is used, whereas for smaller distances, the linear sweep mode offers up to 7 microns of high-dynamics positioning with resolutions far below one nanometer and bandwidth in the kHz range. Because the principle is not based on sliding friction (as with ultrasonic or inertial motors) there is virtually no particulate generation. The NEXACT® drive principle offers very high repeatability and can hold a stable position to nanometers even when powered down.
Another advantage is the autolocking feature with virtually no heat dissipation at rest, a great improvement over stepper motors, thus eliminating laser drift. The ceramic actuators require no lubricants, so the NEXACT® drive principle is high-vacuum compatible, as well as being and non-magnetic. Because linear motion is generated in the first place, backlash, friction and wear as caused by conventional rotating tip actuators are not an issue here.
A compact benchtop controller with high-level command interface and comprehensive software driver package and OEM PCB versions are available to drive the actuators.
In summary, the NEXCACT® drive is the ideal precision linear actuator for OEMs. It provides extremely high dynamics, resolution and stability. Its miniature size (only 25x25x12 mm) along with easy control and long lifetime (no wear) allow seamless integration into the final product.
About PI (Physik Instrumente) L.P.
PI is a leading manufacturer of nanopositioning and precision motion-control equipment for photonics, nanotechnology, semiconductor and life science applications. PI has been developing and manufacturing standard & custom precision products with piezoelectric and electromagnetic drives for 35+ years. The company has been ISO 9001 certified since 1994 and provides innovative, high-quality solutions for OEM and research. PI is present worldwide with eight subsidiaries and total staff of 450+.
For more information, please click here
PI (Physik Instrumente) L.P.
USA East Coast Contact
Tel: (508) 832-3456
Fax: (508) 832-0506
USA West Coast Contact
Tel: (949) 679-9191
Fax: (949) 679-9292
Germany: +49 (721) 4846-0
Italy: +39 (02) 665 011 01
France: +33 (1) 481 039 30
UK: +44 (1582) 764 334
Japan: +81 (6) 6304 5605
China +86 (21) 687 900 08
Dir. Corp. Product Marketing & Communications
PI (Physik Instrumente) L.P.
16 Albert St.
Auburn, MA 01501
Copyright © PI (Physik Instrumente) L.P.If you have a comment, please Contact us.
Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
|Related News Press|
Graphene under pressure August 26th, 2016
50 years after the release of the film 'Fantastic Voyage,' science upstages fiction: Science upstages fiction with nanorobotic agents designed to travel in the human body to treat cancer August 25th, 2016
University of Puerto Rico and NASA back in the news – XEI reports August 23rd, 2016
Spider silk: Mother Nature's bio-superlens August 22nd, 2016
New theory could lead to new generation of energy friendly optoelectronics: Researchers at Queen's University Belfast and ETH Zurich, Switzerland, have created a new theoretical framework which could help physicists and device engineers design better optoelectronics August 23rd, 2016
Hexagonal boron nitride semiconductors enable cost-effective detection of neutron signals: Texas Tech University researchers demonstrate hexagonal boron nitride semiconductors as a cost-effective alternative for inspecting overseas cargo containers entering US ports August 17th, 2016