Near real-time measurement of forces applied by an optical trap to a rigid cylindrical object

作者：Glaser Joseph; Hoeprich David; Resnick Andrew^*

来源：Optical Engineering, 2014, 53(7): 074110.

DOI：10.1117/1.OE.53.7.074110

• laser tweezers
• optical trapping

An automated data acquisition and processing system is established to measure the force applied by an optical trap to an object of unknown composition in real time. Optical traps have been in use for the past 40 years to manipulate microscopic particles, but the magnitude of applied force is often unknown and requires extensive instrument characterization. Measuring or calculating the force applied by an optical trap to nonspherical particles presents additional difficulties which are also overcome with our system. Extensive experiments and measurements using well-characterized objects were performed to verify the system performance. (c) The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

• 出版日期2014-7