Liquid explosive detection using near infrared LED

Hideo Itozaki; Shiori Ito; Hideo Sato-Akaba; Yuji Miyato

doi:10.1117/12.2194658

21 October 2015 Liquid explosive detection using near infrared LED

Hideo Itozaki, Shiori Ito, Hideo Sato-Akaba, Yuji Miyato

Proceedings Volume 9652, Optics and Photonics for Counterterrorism, Crime Fighting, and Defence XI; and Optical Materials and Biomaterials in Security and Defence Systems Technology XII; 965207 (2015) https://doi.org/10.1117/12.2194658
Event: SPIE Security + Defence, 2015, Toulouse, France

Abstract

A bottle scanner to detect liquid explosive has been developed using technologies of near infrared. Its detection rate of liquid explosive is quite high and its false alarm rate of safe liquids quite low. It uses a light source with wide spectrum such as a halogen lamp. Recently a variety of LEDs have been developed and some of them have near infrared spectrum. Here a near infrared LED is tested as a light source of the liquid explosive detector. Three infrared LEDs that have a main peak of spectrum at 901nm, 936nm, and 1028 nm have been used as a light source to scan liquids. Spectrum widths of these LEDs are quite narrow typically less than 100 nm. Ten typical liquids have been evaluated by these LEDs and the correlation coefficients of a spectrum by an LED and a tungsten lamp were more than 0.98. This experiment shows that the infrared LED can be used as a light source for the liquid scanner. An LED has some merits, such as long life of more than some ten thousand hours and small consumption electric power of less than 0.2 W. When the LED is used as a light source for the liquid scanner, it is also more compact and handy.

Citation Download Citation

Hideo Itozaki, Shiori Ito, Hideo Sato-Akaba, and Yuji Miyato "Liquid explosive detection using near infrared LED", Proc. SPIE 9652, Optics and Photonics for Counterterrorism, Crime Fighting, and Defence XI; and Optical Materials and Biomaterials in Security and Defence Systems Technology XII, 965207 (21 October 2015); https://doi.org/10.1117/12.2194658

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