2 March 2015 Low cost, high resolution optical coherence tomography utilizing a narrowband laser diode
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Abstract
We developed a low cost, high resolution optical coherence tomography system utilizing a narrowband laser diode (LD), which is usually used in optical pickup for compact disc. To achieve high axial resolution even with the narrow bandwidth of the LD, we have constructed a free space interferometer including a phase-diversity detection system and a high numerical aperture (NA) objective. The axial and lateral resolution in the air was about 2.6 μm and 1 μm, respectively. The tomographic imaging of biological tissue was demonstrated, and the results showed that our OCT system enabled cellular-level imaging.
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Kentaro Osawa, Naoko Senda, Hiroyuki Minemura, Koichi Watanabe, Jun Hato, Daisuke Tomita, "Low cost, high resolution optical coherence tomography utilizing a narrowband laser diode", Proc. SPIE 9312, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XIX, 931237 (2 March 2015); doi: 10.1117/12.2074244; https://doi.org/10.1117/12.2074244
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