PROCEEDINGS OF SPIE SPIEDigitalLibrary.org/conference-proceedings-of-spie Spatial measurement of spurious forces with optical tweezers Ignacio Bordeu Giovanni Volpe Juan Pablo Staforelli Downloaded From: https://www.spiedigitallibrary.org/conference-proceedings-of-spie on 9/28/2017 Terms of Use: https://spiedigitallibrary.spie.org/ss/TermsOfUse.aspx