PIFOC® High-Speed Microscope Objective Nanofocusing/Scanning Z-Drives
P-720 objective nanofocusing / scanning drive (objective not included)
P-720 objective nanofocusing / scanning drive (objective not included)
  • Scans and Positions Objectives with Sub-nm Resolution
  • Low Inertia for Fast Settling
  • Frictionless Precision Flexure Guiding System
  • Travel to 100 µm
  • Straightness of Travel £13 µrad
  • PICMA® High-Performance Piezo Drives
P-721 on a microscope turret
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Application Examples
  • Scanning interferometry
  • Surface structure analysis
  • Disk drive testing
  • Autofocus systems
  • Confocal microscopy
  • Biotechnology
  • Semiconductor test equipment

P-720 PIFOCs® are high-speed, piezo-driven microscope objective nanofocusing/scanning devices which can be mounted on most microscopes. The frictionless, flexure guiding system combines high guiding precision for superior focus stability with fast response for rapid settling and scanning. The units are screwed between the turret and the objective, providing a positioning and scanning range of up to 100 µm with sub-nanometer resolution, while extending the optical path by only 13 mm (infinity-corrected microscope required; extension tubes are available to adjust path lengths of other objectives on the turret). The standard thread is W0.8 x 1/36”, for alternate threads see the P-721.CLQ. For larger positioning ranges, to 460 µm, see the P-725, page see link.

The P-720 open-loop PIFOC® is designed for fast, high-resolution positioning and scanning tasks where the absolute position is not important or where an external sensor is used. The vertical position of the objective is roughly proportional to the drive voltage (see p. see link ff. in the “Tutorial: Piezoelectrics in Positioning” section for behavior of open-loop piezos).
If absolute position control, high linearity, or repeatability in the nanometer range is required, refer to the P-721 and P-725 closed-loop devices (see pages see link and see link).

Working Principle / Reliability
PIFOCs® are equipped with the award winning PICMA® piezo drives, integrated into a sophisticated flexure guiding system. The wire-EDM-cut flexures are FEA modeled for zero stiction, zero friction and exceptional guiding precision. The ceramic-encapsulated PICMA® drives are more robust than conventional piezo actuators, featuring superior lifetime and performance in both dynamic and static applications.

See the “Selection Guide” on p. see link ff. for comparison with other nanopositioning systems.
Application Articles, Background Information, External Links

Papers & Articles
Related Information:
P-721 PIFOC® Piezo Flexure Objective Scanner
Fast Nanopositioner and Scanner for Microscope Objectives
P-725 PIFOC® Long-Travel Objective Scanner
High-Precision Positioner / Scanner for Microscope Objectives
P-737 PIFOC® Specimen-Focusing Z Stage
Low-Profile, Long-Range Piezo Z Nanopositioner for Microscopy Samples
P-601 PiezoMove™ Z-Actuator
Flexure-Guided OEM Piezo Actuator with Long Stroke to 400 µm
E-610 Piezo Amplifier / Controller
1-Channel OEM Piezo Driver Module with Optional Position Servo-Control

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