Active Optics / Fast Tip-Tilt Piezo Steering Mirrors


 

PI's ultra fast steering mirror platforms are based on frictionless flexure guides and high-speed solid-state piezoelectric drives. These compact devices can provide integrated pitch and roll motion with only one moving mirror. They are faster than galvo-scanners and voice-coil driven beam steering systems (also available from PI) and can be used in both static and highly dynamic operation (e.g. scanning, tracking, drift and vibration cancellation).

Advantages of the PI steerable mirrors are: parallel kinematics design (coplanar multiaxis motion), fast response (sub-millisecond), high resolution (up to nanoradian range), long travel ranges (up to 6 degrees deflection).

PI's parallel-kinematics multi-axis steering mirrors use only one platform/mirror for all axes. There is one common pivot point and no polarization rotation, an important feature for many precision optics applications.

 
Single-Axis
Platforms / Shifters
Multi-Axis Tip/Tilt Platform Z/Tip/Tilt Platforms(w/Aperture) Large Angle
Tip/Tilt Mirrors
Nanofocusing Scanning Drives

Piezo Ceramic
Tubes
Z-/Tip/Tilt(w Aperture) High Performance
Actuators
Large Astronomy Steering Mirrors Piezo
Controllers



Single-Axis Steerable Mirror Platforms / Phase Shifters




S-303 High Speed Piezo Phase Shifters with Direct Metrology Option


High-Speed Piezo Phase Shifters with Direct Metrology Option
  • 25 kHz Resonant Frequency for Sub-Millisecond Dynamics
  • <0.1 Nanometer Resolution
  • Capacitive Sensor Option for Highest Linearity and Stability
  • Invar Option for Highest Thermal Stability
  • Aperture with Open-Loop Versions
  • 3 Micron Travel Range
  • Compact Size : 30 mm Diameter x 10
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Specifications & Drawings, Request Quote | PDF Datasheet





S-224 Fast Steering Mirror / Miniature Piezo Tilt Mirror


High-Speed Miniature Piezo Tilt Mirror
  • Sub-microradian Resolution
  • Very Fast: 10 kHz Resonant Frequency for Sub-Millisecond Response
  • Up to 4.4 milliradian Optical Beam Deflection
  • Closed-Loop Versions for Better Linearity
  • Includes BK7 Mirror
  • Zero Friction Flexure Guiding System
Specifications & Drawings, Request Quote | PDF Datasheet




Multi-Axis Tip/Tilt Steerable Mirrors -- Pitch & Roll Motion





S-330 Fast Steering Mirror / High Speed Piezo Tip/Tilt (Pitch/Roll) Platforms


High-Speed Piezo Tip/Tilt Platforms
  • Fixed Orthogonal Axes with a Common Pivot Point
  • Up to 20 milliradian Optical Beam Deflection
  • Up to 20 nanoradian Resolution
  • For Mirrors up to 50 mm θ
  • Closed-Loop Versions for Better Linearity
  • Differential Design for Excellent Temperature Stability
  • Zero Friction Flexure Guides
  • Single-Moving-Platform, Parallel-Kinematics Design: Equal Dynamics for all Axes, Better Linearity & Temperature Stability
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Specifications & Drawings, Request Quote | PDF Datasheet





S-334 Fast Tip/Tilt Steering Mirror. Long-Range Piezo Drive (100 mrad Deflection)


Large Angle Piezo Steering Mirror
  • Optical Deflection to 100 milliradian (∼6°) in Pitch and Roll
  • Closed-Loop Version for Higher Linearity
  • For Mirrors up to 12.5 mm (0.5") Diameter
  • 2 Fixed Orthogonal Axes with a Common Pivot Point
  • Sensor Configuration for Excellent Temperature Stability
  • Zero Friction Flexure Guides
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Specifications & Drawings, Request Quote | PDF Datasheet





S-340 Fast Steering Mirror / High-Speed Piezo Tip/Tilt (Pitch/Roll) Platform


High-Speed Piezo Tip/Tilt Platforms
  • Fixed Orthogonal Axes with a Common Pivot Point
  • 4 milliradian Optical Beam Deflection
  • For Mirrors to 100 mm θ
  • Sub-microradian Resolution
  • Closed-Loop Versions for Better Linearity
  • Differential Design for Excellent Temperature Stability
  • Zero Friction Flexure Guides
  • Single-Moving-Platform, Parallel-Kinematics Design: Equal Dynamics for all Axes, Better Linearity & Temperature Stability
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Specifications & Drawings, Request Quote | PDF Datasheet




Z + Tip/Tilt Motion Platforms (with Aperture)





S-310 and S-316 Fast Steering Mirror Platform / Piezo Tip/Tilt Platforms and Z Positioners w/Aperture


High-Speed Multi-Axis Tip/Tilt Platforms and Z Positioners
  • 10 mm Clear Aperture
  • Piezo Tripod Design Allows Z Motion and Tilt
  • Up to 2.4 milliradian Optical Beam Deflection
  • Piston Movement up to 12 Micron
  • Closed-Loop Versions for Better Linearity
  • For Optics, Mirrors or Other Components
  • Zero Friction Guiding Mechanism
  • Single-Moving-Platform, Parallel-Kinematics Design : Equal Dynamics for all Axes, Better Linearity & Temperature Stability
Specifications & Drawings, Request Quote | PDF Datasheet





S-325 Fast Steering Mirror, Piezo Tip/Tilt Platform & Z Positioner


High-Speed Piezo Tip/Tilt Platform and Z Positioner
  • Piezo Tripod Design Allows Pitch, Roll+ Z-Piston Motion
  • 10 milliradian Optical Beam Deflection
  • Piston Movement up to 30 Micron
  • Closed-Loop Versions for Better Linearity
  • For Mirrors up to 25 mm (1 inches) Diameter
  • Zero Friction Flexure Guides
  • Single-Moving-Platform, Parallel-Kinematics Design: Equal Dynamics for all Axes, Better Linearity & Temperature Stability
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Specifications & Drawings, Request Quote | PDF Datasheet




E-616 Motion Controller for Multi-Axis Piezo Tip/Tilt Mirrors and Platforms

 
E-616 Motion Controller for Multi-Axis Piezo Tip/Tilt Mirrors and Platforms

Benchtop Piezo Motion  Controller for Nanopositioning  
E-616 Benchtop Model
  • Precision Motion Control for Piezo Nano Positioning Systems
  • Bench-Top and OEM Versions
  • Three Integrated Amplifiers Provide up to 10 W Peak Power
  • Closed-Loop and Open-Loop Versions
  • Internal Coordinate Transformation Simplifies Control
    of Parallel Kinematics Designs (Tripod & Differential Drive)
  • Compact and Cost-Effective Design for OEMs or Bench-Top
Specifications & Drawings, Request Quote | PDF Datasheet




Fast Steering Mirrors / Active Optics in Astronomical Telescopes


Resolution in large earthbound telescopes is limited by atmospheric turbulence and vibrations. During the last 25 years PI has designed a number of large-aperture high bandwidth tip/tilt systems for image stabilization. Piezoelectrically driven active secondary mirrors can improve the effective resolution up to 1000% by correcting for these image shifts in real time, especially during long integrations with weak light sources.

Momentum Compensation
Due to the inertia of the large mirrors and the high accelerations required to correct for image fluctuations, significant forces can be induced in the telescope structure, causing unwanted vibrations. PI has developed momentum compensation systems integrated into the tip/tilt platforms which cancel undesirable vibrations and thus offer significantly better stabilization than uncompensated systems.

More Information on PI Precsion Motion Control Products in Astronomy
>> Poster: High Stability Piezo-Motor Driven Mirror Mounts for LINC-NIRVANA
>> PI Wins Hexapod Order for ALMA Millimeter Radio Telescope
>> M-850.K102 Ultra-High-Load Hexapod for Astronomy
>> More on Hexapods
>> Catalog: High Bandwidth / Low Bandwidth Steering Mirror Systems


Keck I and Keck II observatories and NASA Infrared Telescope
Facility (IRTF, silver dome), Mauna Kea, Hawaii; Photo: K.
Spanner.


The Horsehead Nebula



View of the 8.2 m Subaru infrared telescope in Hawaii (from http://SubaruTelescope.org/Index.html), printed with permission of NAOJ.

Active tip/tilt mirror for the Subaru Telescope (Mauna Kea, Hawaii). Mirror diameter: 150 mm. Tip/tilt range: ±600 µrad. Resonant frequency: 610 Hz

Active tip/tilt mirror for the Subaru telescope, rear view.

Active tip/tilt mirror for the United Kingdom infrared telescope (UKIRT) on Mauna Kea, Hawaii with Secondary Hexapod 6-D alignment system (more information on Hexapod systems).
Mirror diameter: 314 mm
Tip/tilt range: ±500 µrad
Resonant frequency: 280 Hz

Active secondary mirror for NASA Infrared Telescope Facility (IRTF) on Mauna Kea, Hawaii,with Hexapod 6-D alignment system (more information on Hexapod systems).
Mirror diameter: 244 mm
Tip/tilt range: ±250 µrad
Resonant frequency: 490 Hz

Active tip/tilt mirror system for the Keck Outrigger telescope in Hawaii. The units are controlled by a high-performance digital controller with a fiber optic interface (not shown).
Mirror diameter: 250 mm
Tip/tilt range: ±150 µrad
Resolution: nanoradian range
Position measurement: capacitive

Active secondary tip/tilt mirror for the 2.2 m ESO (European Southern Observatory) telescope in La Silla, Chile.
Mirror diameter: 100 mm
Tip/tilt range: ±400 µrad
Resonant frequency: 900 Hz

Telescope structure with active secondary mirror (from "Progress Report on DISCO: A Project for Image Stabilization at the 2.2 m Telescope," F. Maaswinkel, S. D'Odorico and G. Huster, ESO, F. Bortoletto, Istituto di Astronomia, University of Padova, Italy).




Large Z/Tip/Tilt Stages (with aperture)
 
 



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