6 September 2013 OCT based on multi-frequency sweeping Fizeau interferometer with phase modulating method
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Abstract
The Multi-frequency sweeping Fizeau-type interferometer (MFS-FI) for optical coherence tomography (OCT) is demonstrated. The multi-frequency sweeping by a variable Fabry-Perot filter permits detection of high-order low-coherence interferometric signals in the Fizeau interferometer. The sinusoidal phase modulation technique was utilized to detect accurate interference amplitude and phase distributions of back scattered light from surfaces of a sample. OCT measurements by the MFS-FI were conducted for vibrating glass plates with a frequency of 1 kHz, and cellular tissues fixed with formalin and embedded in paraffin. The tomographic 3-dimensional volume and cross-sectional surface displacements were detected with an accuracy of nano-meters.
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S. Choi, T. Watanabe, O. Sasaki, T. Suzuki, "OCT based on multi-frequency sweeping Fizeau interferometer with phase modulating method", Proc. SPIE 8839, Dimensional Optical Metrology and Inspection for Practical Applications II, 88390D (6 September 2013); doi: 10.1117/12.2023816; https://doi.org/10.1117/12.2023816
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