Rotational Speed Control by Optical PWM Operation for Single Cells
Makoto Yoshida*, Ichirou Ishimaru*, Katsumi Ishizaki*,
Toshiki Yasokawa*, and Yusuke Inoue**
*Faculty of Engineering, Kagawa University, 2217-20 Hayashi-cho, Takamatsu, Kagawa 761-0396, Japan
**Fuji Xerox Corporation, 2-17-22 Akasaka, Minato-ku, Tokyo 107-0052, Japan
To rotating single cells, we harness light pressure generated by light absorption as a rotating torque, illuminating the two proximal points from different directions using two beams. Rotational speed is controlled by optical pulse width modulation (PWM) that controls the amount of light received per unit of time by controlling the time of illumination. To change the illumination time, the pencil of rays is scanned by a galvanometric mirror.
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