Near-infrared imaging of liquid mixtures utilizing multi-channel photonic crystal wavelength filters

Masahiro Mitsuhashi, Yasuo Ohtera, Hirohito Yamada

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We demonstrate a near-infrared (NIR) spectroscopy-based real-time imaging system of aqueous alcohol solutions (ethanol containing water). The system obtains a set of NIR images by the combination of an InGaAs area sensor and four-channel patterned photonic crystal wavelength filters. Acquired pictures were decomposed into a set of NIR images and processed by principal component analysis (PCA). According to a preliminary experiment for water/ ethanol mixture samples, we confirmed that the system was capable of identifying the mixture ratio with accuracy of the order of a few percentage points at a frame rate of approximately 24 frames per second (fps).

Original languageEnglish
Pages (from-to)5301-5304
Number of pages4
JournalOptics Letters
Volume39
Issue number18
DOIs
Publication statusPublished - 2014 Sep 15

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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