微流體黏滯度分析系統之設計與研製
Date Issued
2005-07-31
Date
2005-07-31
Author(s)
管傑雄
DOI
932213E002074
Abstract
Upright and inverted configurations of optical tweezer embedded differential
confocal microscopes are constructed. The Q value and the spring constant k of
optical tweezer are characterized in the upright configuration system. In the setup
constructed with inverted microscope, a quadrant photodiode is used to perform
detection of lateral displacement. Combining with the depth resolution power of
differential confocal microscope, three-dimensional positioning of a microsphere has
been verified. Within 1-μm dynamic range in three axes, the resolutions of X, Y, and Z
axes are 8 nm, 10 nm, 5 nm, respectively. By measuring the power spectrum density
of silica bead trapped in optical tweezer, the cut-off frequency of Lorentz distribution
is fitted. With the cut-off frequency and the spring constant k, the coefficient of
viscosity of water is estimated in the experiment, of the error within 1% from the
standard value.
Subjects
optical tweezer embedded differential confocal microscopes are
constructed
constructed
coefficient of viscosity
Publisher
臺北市：國立臺灣大學電子工程學研究所
Type
report
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