AN APPARATUS AND A METHOD FOR NON-INVASIVE MEASUREMENT BY MULTIPLE WAVELENGTH

摘要

A non-invasive measuring method and apparatus using multiple wavelengths are provided to measure a characteristic degree of accurate materials by compensating a measuring error of an incident wave and a transmitted wave. A non-invasive measuring apparatus using multiple wavelength includes a signal generator(10), a signal detector(20), and a characteristic degree extractor(30). The signal generator irradiates at least two multiple signals having different wavelengths to a medium. The signal detector detects a signal having a first wavelength passing target materials to measure a first characteristic degree of the target material, and detects a signal having a second wavelength to measure a second characteristic degree of the target material. The characteristic degree extractor compares the first characteristic degree of the target material and the second characteristic degree of the target material, and measures a relative characteristic degree of the target material.