Page 176 -

166 4 Optical Rotor
4. flow visualization using milk fat colloid in glycerol solution with grazing
angle illumination
5. pathline and velocity vector analyses around the mixer
6. flow amount analysis around the mixer
7. two-liquid mixingperformance in a microchannel is confirmed usingthe
optically trapped mixer both by theoretically and experimentally.

Problems

4.1. How can the optical torque for a three-wingshuttlecock rotor be in-
creased?

4.2. How is the optical torque dependence on the rotor diameter simulated
for a four-wingshuttlecock under the conditions listed in Table 4.1?

4.3. How is the rotation rate dependence on the refractive index for the cylin-
drical optical rotor with a slope angle of 45 simulated under the conditions
◦
listed in Table 4.2?
4.4. What is the relationship between the rotation rate and the number of
◦
slopes of the cylindrical rotor with 45 slope angle under the conditions listed
in Table 4.2?
4.5. What is a suitable optical mixer structure for used in the microchannel
of future µ-TAS?