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Shutters: (a) stepper motor, (b) relay, and (c) piezoelectric actuator. The arrows in subfigure (b) indicate where sorbothane has been installed to provide vibration damping.
Circuits used to drive: (a) stepper motor, (b) relay, and (c) piezoelectric actuator. Heat sink required for: (a) L293D, (b) 750 Ω, and (c) IGBT.
Approximate Gaussian pulse generated with the stepper motor shutter by varying the duration and direction of each step.
(a) Piezoelectric actuator shutter displacement as a function of time. (b) Transmitted intensity when the shutter is at the focal point of the lens.
Performance of different shutter designs.
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