A motion compensated fiber optic confocal microscope based on common-path optical coherent tomography distance sensor

Yong Huang; Kang Zhang; Ching Lin; Jin U. Kang

doi:10.1117/12.873917

16 February 2011 A motion compensated fiber optic confocal microscope based on common-path optical coherent tomography distance sensor

Yong Huang, Kang Zhang, Ching Lin, Jin U. Kang

Author Affiliations +

Proceedings Volume 7894, Optical Fibers, Sensors, and Devices for Biomedical Diagnostics and Treatment XI; 789408 (2011) https://doi.org/10.1117/12.873917
Event: SPIE BiOS, 2011, San Francisco, California, United States

Abstract

A motion compensated fiber optic confocal microscope system is demonstrated using a combination of a Fourier domain common-path optical coherence tomography (CP-OCT) distance sensor and a high-speed linear motor. The confocal microscope is based on 460 micron diameter fiber bundle terminated with a gradient index (GRIN) lens. Using the peak detection of a 1-D A-scan data of CP-OCT, the distance deviation from the focal plane could be monitored in real-time. When the distance deviation surpasses a certain threshold, the linear motor drives the confocal microscope probe at a speed related to the change in the deviation to maintain the deviation within a predetermined limit. The motion compensation was achieved for a confocal microscope imaging rate of 1Hz with an average distance error of 4 microns.

Citation Download Citation

Yong Huang, Kang Zhang, Ching Lin, and Jin U. Kang "A motion compensated fiber optic confocal microscope based on common-path optical coherent tomography distance sensor", Proc. SPIE 7894, Optical Fibers, Sensors, and Devices for Biomedical Diagnostics and Treatment XI, 789408 (16 February 2011); https://doi.org/10.1117/12.873917

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