Combined holographic-mechanical optical tweezers: Construction, optimization, and calibration

A spatial light modulator (SLM) and a pair of galvanometer-mounted mirrors (GMM) were combined into an optical tweezers setup. This provides great flexibility as the SLM creates an array of traps, which can be moved smoothly and quickly with the GMM. To optimize performance, the effect of the incide...

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Veröffentlicht in:Review of scientific instruments 2009-08, Vol.80 (8), p.083703-083703-7
Hauptverfasser: Hanes, Richard D. L., Jenkins, Matthew C., Egelhaaf, Stefan U.
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Jenkins, Matthew C.
Egelhaaf, Stefan U.
description A spatial light modulator (SLM) and a pair of galvanometer-mounted mirrors (GMM) were combined into an optical tweezers setup. This provides great flexibility as the SLM creates an array of traps, which can be moved smoothly and quickly with the GMM. To optimize performance, the effect of the incidence angle on the SLM with respect to phase and intensity response was investigated. Although it is common to use the SLM at an incidence angle of 45°, smaller angles give a full 2 π phase shift and an output intensity which is less dependent on the magnitude of the phase shift. The traps were calibrated using an active oscillatory technique and a passive probability distribution method.
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subjects CALIBRATION
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Equipment Design
FLEXIBILITY
GALVANOMETERS
HOLOGRAPHY
INCIDENCE ANGLE
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Light
MIRRORS
MODULATION
Motion
Normal Distribution
Optical Rotation
Optical Tweezers
Optics and Photonics - instrumentation
Optics and Photonics - methods
OPTIMIZATION
Periodicity
PHASE SHIFT
Polystyrenes - chemistry
PROBABILITY
VISIBLE RADIATION
title Combined holographic-mechanical optical tweezers: Construction, optimization, and calibration
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