[OPTICAL REVIEW Vol. 10, No. 5 (2003) 478-481]
© 2003 The Optical Society of Japan

Ultra-High Resolution Optical Coherence Tomography (OCT) Using a Halogen Lamp as the Light Source

Masato OHMI* and Masamitsu HARUNA

Course of Allied Health Sciences, Graduate School of Medicine, Osaka University, 1-7 Yamada-Oka, Suita, Osaka 565-0871, Japan

(Received February 28, 2003; Accepted April 14, 2003)

The axial resolution of optical coherence tomography (OCT) is determined by the coherence length of the light source. We demonstrate for the first time high-resolution OCT of biological tissue using a halogen lamp as the light source for a low coherence interferometer. High-resolution OCT imaging with 3.5 μm resolution was performed successfully for onion and porcine skin, although the coherence light power for illumination of a sample is as small as 100 nW.

Key words: optical coherence tomography, high-resolution OCT, halogen lamp, bulk-optic interferometer, fiber-optic interferometer

*E-mail address: ohmi@sahs.med.osaka-u.ac.jp