光パルス幅変調による近接2光束ピンセット回転トルク制御

概要

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This paper reports on the rotational control method of the proximal two-beam optical tweezers. The proximal two-beam optical tweezers can rotate a microsphere in the optical axis direction by using the light pressure as the rotational torque. To apply the proximal two-beam optical tweezers to the arbitrary-shaped microspheres, the rotational torque should be operated in two dimensions. For this purpose, we propose the optical pulse width modulation. This proposed method controls the amount of light received per unit time by operating the span of the illumination time. To change the illumination span, the pencil of rays is scanned by the galvanometric mirror independently in two dimensions. We verified that the rotational torque of a microsphere 10μm in diameter can be controlled.
社団法人精密工学会の論文
2006-12-05