Low Cost, High Resolution Optical Coherence Tomography Utilizing A Narrowband Laser Diode

Kentaro Osawa,Naoko Senda,Hiroyuki Minemura,Koichi Watanabe, Jun Hato,Daisuke Tomita

OPTICAL COHERENCE TOMOGRAPHY AND COHERENCE DOMAIN OPTICAL METHODS IN BIOMEDICINE XIX（2015）

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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 mu m and 1 mu m, 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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Key words

optical coherence tomography,OCT,low cost,high resolution

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