Optimal scanning function of a galvanometer scanner for an increased duty cycle

Virgil-Florin Duma

doi:10.1117/1.3497570

1 October 2010 Optimal scanning function of a galvanometer scanner for an increased duty cycle

Virgil-Florin Duma

Author Affiliations +

Optical Engineering, Vol. 49, Issue 10, 103001 (October 2010). https://doi.org/10.1117/1.3497570

Abstract

We study different possible scanning functions of a galvanometer-based scanner (GS), considered with an optimal profile for the user, i.e., symmetrical, linear on their active portions, and with fast stop-and-turn parts. The scope is to obtain the function that provides the highest theoretical limit of the duty cycle of the device. From the equation of the oscillatory mirror, the active torque is obtained with regard to the scanning function. Several equations are studied for the stop-and-turn parts: polynomials of different orders and sinusoidal. We demonstrate that the choice has to be done between the two most advantageous scanning functions: linear plus parabolic and linear plus sinusoidal. The relationships between the characteristic parameters of the GS, i.e., stop-and-turn time interval, scan frequency and velocity, duty cycle, and maximum inertia torque are deduced and compared for these two functions. We demonstrate that, contrary to what is considered in the literature, the best function, i.e., the one that provides the highest duty cycle (and to obtain that, the lowest inertia torque, for minimum stop-and-turn time) is the linear plus parabolic function.

©(2010) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Virgil-Florin Duma "Optimal scanning function of a galvanometer scanner for an increased duty cycle," Optical Engineering 49(10), 103001 (1 October 2010). https://doi.org/10.1117/1.3497570

Published: 1 October 2010

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