Control aspects of the single-fiber scanning endoscope

Quinn Y. J. Smithwick; Eric J. Seibel; Per G. Reinhall; J. Vagners

doi:10.1117/12.427920

4 June 2001 Control aspects of the single-fiber scanning endoscope

Quinn Y. J. Smithwick, Eric J. Seibel, Per G. Reinhall, J. Vagners

Proceedings Volume 4253, Optical Fibers and Sensors for Medical Applications; (2001) https://doi.org/10.1117/12.427920
Event: BiOS 2001 The International Symposium on Biomedical Optics, 2001, San Jose, CA, United States

Abstract

The Single Fiber Scanning Endoscope (SFSE) is a new class of endoscopes being developed at the University of Washington's Human Interface Technology lab which uses combinations of a resonating optical fiber and a single photodetector to produce large field of view, high-resolution images from a small flexible package. Although current prototypes show the validity of the concept, the nonlinear response of the resonant optical fiber under open loop control creates image distortion or limits the frame rate. Due to low damping and nonlinear effects in the fiber, open loop control, phase lock loops, PID control, classical and modern controllers are all unable to produce accurate, reproducible, robust high frequency 2D scans. A nonlinear control scheme, feedback linearization, is capable of accurately producing a scan and is robust to most of the unavoidable manufacturing and environmental variability in the resonant scanner. Through theoretical analysis and simulations, this paper reviews the application of the following variety of open loop and closed loop controllers to the nonlinear scanner of the SFSE: open loop control, modelless closed loop control (phase lock loop and PID control), feedforward plus feedback classical and modern state space tracking control, and nonlinear feedback linearization control.

Citation Download Citation

Quinn Y. J. Smithwick, Eric J. Seibel, Per G. Reinhall, and J. Vagners "Control aspects of the single-fiber scanning endoscope", Proc. SPIE 4253, Optical Fibers and Sensors for Medical Applications, (4 June 2001); https://doi.org/10.1117/12.427920

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available