25 September 2014 Near-infrared imaging equipment that detects small organic substances in thick foods
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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.
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Souphaphone Phetchalern, Souphaphone Phetchalern, Hiroto Tashima, Hiroto Tashima, Yuya Ishii, Yuya Ishii, Takeshi Ishiyama, Takeshi Ishiyama, Shinichi Arai, Shinichi Arai, Mitsuo Fukuda, 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); doi: 10.1117/12.2061455; https://doi.org/10.1117/12.2061455

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