Open AccessEffect of optical magnifications on the displacement measurements in optical tweezers system
Author(s) -
Chunxiang Liu,
Hongjie Guo,
Jiang Yu-Qiang,
Zhaolin Li,
Bingying Cheng,
Daozhong Zhang
Publication year - 2005
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.54.1162
Subject(s) - photodiode , linearity , detector , optics , amplitude , optical tweezers , displacement (psychology) , signal (programming language) , particle displacement , physics , materials science , photodetector , quantum mechanics , computer science , psychology , psychotherapist , programming language
The effect of different optical magnifications on the amplitude and linearity of displacement signals measured by the photodiode quadrant detector in an optical tweezers system is studied both experimentally and theoretically. Based on the experimental results we find that the output signal with larger amplitude and more preferable linearity can be obtained when the magnified images of α particle have diameters of 50% to 60% of the detector diameter. Theoretical calculation confirms it.