Application of a Fourier-transform infrared imaging system to deciphering obliterated writings for forensic purposes

Shigeru Sugawara

doi:10.1117/12.2049894

29 May 2014 Application of a Fourier-transform infrared imaging system to deciphering obliterated writings for forensic purposes

Shigeru Sugawara

Author Affiliations +

Proceedings Volume 9073, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XV; 90730D (2014) https://doi.org/10.1117/12.2049894
Event: SPIE Defense + Security, 2014, Baltimore, MD, United States

Abstract

A new method of deciphering obliterated writing is proposed in this paper. Inks with a peak at 1620 cm-1 were used for writing characters on paper, and information protection stamps were then used to obliterate them. Conventional detection methods consisting of visible and near-infrared spectroscopic photography and fluorescent photography of wavelength between 0.4–1.0 μm were compared with a novel method using infrared spectroscopic imaging with a 16-element mercury cadmium telluride array detector. The samples of obliterated writing could not be detected by the conventional methods, but could by the new method. Therefore, this new method is very useful for deciphering obliterated writing.

Citation Download Citation

Shigeru Sugawara "Application of a Fourier-transform infrared imaging system to deciphering obliterated writings for forensic purposes", Proc. SPIE 9073, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XV, 90730D (29 May 2014); https://doi.org/10.1117/12.2049894

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