16 February 2011 A motion compensated fiber optic confocal microscope based on common-path optical coherent tomography distance sensor
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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.
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Yong Huang, Yong Huang, Kang Zhang, Kang Zhang, Ching Lin, Ching Lin, Jin U. Kang, 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); doi: 10.1117/12.873917; https://doi.org/10.1117/12.873917
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