THREE DIMENSIONAL MEASUREMENTS OF NEAR-INFRARED TOMOGRAPHY

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Optical coherence tomography has been investigated by producing two kinds of systems, based on an optical coherence domain reflectometry and an optical frequency domain reflectometry. The results are as follows :1. Optical Coherence Domain Reflectometry (OCDR)(1) Realization of a low coherence light source which has a bandwidth of 37 nm by means of laser frequency scanning.(2) Amplitude detection and imaging of interference signals by means of variance caluculations.(3) Tomographic imaging of onion cells with a spatial resolution of 4x4x8 μ m.2. Optical Frequency Domain Reflectometry (OFDR)(1) Realization of a linearly frequency-scanned laser source without mode-hopping and synchronized resistration system for storing many flame images.(2) Improvement of a system dynamic range upto 60 dB.(3) Tomographic imaging of chikken tissue and born.