Control of an optical fiber scanner

Details Control of an optical fiber scanner Control of an optical fiber scanner

2005-01-18

2005-01-18

Healy, Brian M. (Department: 2883)

Optical waveguides

With optical coupler

Movable coupler

C385S115000, C385S116000, C385S001000, C385S004000, C385S011000, C385S012000, C385S147000

Reexamination Certificate

active

06845190

ABSTRACT:
Controls for an optical scanner, such as a single fiber scanning endoscope (SFSE) that includes a resonating optical fiber and a single photodetector to produce large field of view, high-resolution images. A nonlinear control scheme with feedback linearization is employed in one type of control to accurately produce a desired scan. Open loop and closed loops controllers are applied to the nonlinear optical scanner of the SFSE. A closed loop control (no model) uses either phase locked loop and PID controllers, or a dual-phase lock-in amplifier and two PIDs for each axis controlled. Other forms of the control that employ a model use a frequency space tracking control, an error space tracking control, feedback linearizing controls, an adaptive control, and a sliding mode control.

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