Development of a middle infrared spectroscopic camera.

2015 Fiscal Year Final Research Report

• Project/Area Number: 25750106
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Cultural assets study and museology
• Research Institution: National Research Institute of Police Science
• Principal Investigator: SUGAWARA SHIGERU 科学警察研究所, 法科学第四部, 主任研究官 (60356160)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 広視野中赤外分光 / ボロメータ / 文化財科学 / 法科学 / 色材 / 紙 / 赤外スペクトル / 有機物分析

Outline of Final Research Achievements

A wide-field infrared spectroscopic imaging apparatus that uses a bolometer camera i has been studied. The apparatus utilizes, for Fourier spectroscopy, an imaging type interferometer. By changing the projection magnification, the size of the area to be examined could be easily modified. The spectroscopic imaging of a 40-μm-thick polystyrene film and writing pen inks on a 10 cm × 10 cm aluminum plate could be obtained. The measurement time was constant regardless of the size of the area. The developed apparatus could record spectra of 240 × 320 = 76,800 points with a wavelength resolution of approximately 5 cm－1 in ca. 2 min. As the developed apparatus is very compact and portable, in situ observation of crime material will be possible.

Free Research Field

法科学、光工学、応用物理、分析化学