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- MICRO-CONTROLE / Spectra-Physics
- Objective NanoFocusing Stages
Objective NanoFocusing Stages
1 /2Pages
Objective NanoFocusing Stages
1 /2Pages
Catalog excerpts
The NPO Series Objective NanoFocusing stages are highspeed, piezo-driven devices. They provide fast focusing and scanning over long travel ranges of up to 250 ìm and are compatible with most microscopes and objective lenses. Typical applications include surface profilometry, high-resolution imaging, auto-focusing, scanning interferometry, and confocal microscopy. NPO stages feature highly reliable, multi-layer, lowvoltage, piezoelectric transducer (PZT) stacks, which are optimized for high-duty cycle operations. Image shifts and tilt are minimized by an FEA-modeled and precision EDM-cut parallelogram, solid-state flexure that ensures perfectly straight motion. The sophisticated guide also provides the highest possible stiffness for superior focus stability, higher frequency auto-focusing, shorter settling times and faster scans. NPO stages are maintenance-free and are not subject to wear. NPO NanoFocusing stages are available as open-loop (no position feedback) or closed-loop versions with integrated position feedback. In open-loop, the resolution is only limited by the noise of the control electronics, but repeatability and stability are compromised due to the hysteresis and creep of the piezo ceramic material. The closed-loop systems (model numbers ending in SG) feature high resolution strain-gauge position sensors for highly accurate and repeatable motion. Also, the position feedback compensates for actuator creep. For highest position stability and highest temperature-insensitive performance, the sensors are assembled in a full Wheatstone bridge design. The closed-loop devices can be operated in open or closed-loop control. The NPO NanoFocusing stages mount between the turret and the microscope objective and add only 11.5 mm to the optical path length. All models can be used for standard and inverted microscopes. The standard thread size is W0.8x1/36” and is compatible with all Newport objective lenses. For other thread sizes, please contact Newport. Phone: 1-800-222-6440 • Fax: 1-949-253-1680 • Email: [email protected] • Web: newport.com Objective NanoFocusing Stages • Sub-nm resolution focusing for objectives with RMS thread • Up to 250 ìm focusing range • High resonant frequency for highly dynamic applications • Precision parallelogram design minimizes beam offsets NPO Series 1) Typical value measured with NPC3 and NPC3SG, (-20 V to +130 VDC range). 2) Applies to devices with ending SG in closed-loop control only. 3) Equal to rms noise value measured with NPC3 and NPC3SG controller. Specifications NPO140 NPO140SG NPO250 NPO250SG Open loop travel (± 10%), (ìm) (1) 140 250 Closed loop travel (ìm) (1, 2) 100 200 Open loop resolution (nm) (3) 0.3 0.5 Closed loop resolution (nm) (2) 3 5 Typ. Repeatability (nm) (2) 30 46 Capacitance (± 20%) (ìF) 3.4 10.2 Resonant frequency, unloaded (Hz) 370 310 With 80 g load (Hz) 300 270 With 105 g load (Hz) 270 250 With 300 g load (Hz) 210 155 Axial stiffness (N/ìm) 1.4 0.4 Max lens weight (g) 500 500 Typ. Tilt, full travel (ìrad) <4 <10 Weight (g) 150 255
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PHONE EMAIL Belgium +32-(0)0800-11 257 [email protected] China +86-10-6267-0065 [email protected] France +33-(0)1-60-91-68-68 [email protected] Japan +81-3-3794-5511 [email protected] Taiwan +886 -(0)2-2508-4977 [email protected] PHONE EMAIL Mtn. View, USA +1-800-775-5273 [email protected] Netherlands +31-(0)30 6592111 [email protected] United Kingdom +44-1235-432-710 [email protected] Germany / Austria / Switzerland +49-(0)6151-708-0 [email protected] Newport Corporation, Irvine, California; Mountain View, California; Tucson, Arizona; Evry and Beaune-La-Rolande,...
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