光ヘテロダイン検出法を用いた生体試料の光透過特性に関する分光画像計測法の研究

概要

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We constructed a new spectroscopic imaging system that is a highly sensitive space-resolving spectrophotometer based on an optical heterodyne detection method using a tunable laser. First, we constructed a Mach-Zehnder interferometer using an acousto-optic modulator in order to generate the beat component. This interferometer incorporates two concave mirrors that correct the optical axis slip even if the laser wavelength varies, Next, we constructed an improved high-dynamic-range spectroscopic image system without concave mirrors using an optical heterodyne detection method, Using this system, we measured the spectroscopic characteristics of neodymium glass in a diluted solution of Intralipid -20% as a highly scattering medium. We also acquired a two-dimensional image of a test target in a highly scattering medium at different wavelengths. As a result, we were able to acquire two-dimensional absorbed images of some bio1ogical tissues at different laser wavelengths.
山形大学の論文
2007-02-15