Near-infrared imaging equipment that detects small organic substances in thick foods

Souphaphone Phetchalern; Hiroto Tashima; Yuya Ishii; Takeshi Ishiyama; Shinichi Arai; Mitsuo Fukuda

doi:10.1117/12.2061455

25 September 2014 Near-infrared imaging equipment that detects small organic substances in thick foods

Souphaphone Phetchalern, Hiroto Tashima, Yuya Ishii, Takeshi Ishiyama, Shinichi Arai, Mitsuo Fukuda

Proceedings Volume 9192, Current Developments in Lens Design and Optical Engineering XV; 91921A (2014) https://doi.org/10.1117/12.2061455
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

Abstract

We have developed near-infrared imaging equipment that can detect small organic substances in foodstuffs with thicknesses of more than 1 mm. The equipment is composed of a high output laser diode and a CMOS camera. The irradiated light power distribution was highly uniform with a maximum optical density of 1.3 W/cm². A 0.3-mmdiameter wooden stick covered with a 2-mm-thick layer of ham can easily be distinguished in the images. The bones in fish and in chicken wing sticks could also be distinguished. The thicknesses of the fish and the chicken wing sticks were approximately 30 mm and 20 mm, respectively. We eliminated the low spatial frequency components from the images to improve the image contrast.

Citation Download Citation

Souphaphone Phetchalern, Hiroto Tashima, Yuya Ishii, Takeshi Ishiyama, Shinichi Arai, and Mitsuo Fukuda "Near-infrared imaging equipment that detects small organic substances in thick foods", Proc. SPIE 9192, Current Developments in Lens Design and Optical Engineering XV, 91921A (25 September 2014); https://doi.org/10.1117/12.2061455

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