Development of a real-time optical imaging system for monitoring food quality and assessing human body parts using diffused light

T. Genta; H. Tashima; R. Shimokita; S. Arai; M. Fukuda

doi:10.1117/12.980257

18 December 2012 Development of a real-time optical imaging system for monitoring food quality and assessing human body parts using diffused light

T. Genta, H. Tashima, R. Shimokita, S. Arai, M. Fukuda

Author Affiliations +

Proceedings Volume 8550, Optical Systems Design 2012; 85500F (2012) https://doi.org/10.1117/12.980257
Event: SPIE Optical Systems Design, 2012, Barcelona, Spain

Abstract

Real-time imaging techniques are required in diverse fields, such as food factory production lines for food quality monitoring, and in the medical profession for clinical diagnosis. For these purposes, magnetic resonance imaging and X-ray computed tomography have been developed; however, these techniques are difficult to use and expensive, and cannot detect organic, wooden, or plastic foreign objects in food. Optical measurement methods, in contrast, are simple and cheap, and are suitable for real-time monitoring. Optical coherence tomography and photo-acoustic tomography techniques have been developed, but are not classified as real-time imaging techniques as a certain time interval is necessary for computation and imaging. For real-time light-based imaging, we previously developed a compact system using near infrared light, which could detect insects and human hair in food and the blood vessels in the human body. In this study, we describe an improved system in which organic foreign objects or substances in food and bones in chicken wings can be imaged in real time using diffused light. The system consists of an optical source, composed of superluminescent diodes emitting 830-nm light, a certain optical system eliminating scattering light, and a CMOS sensor covering a wide dynamic range. Foreign substances, such as human hairs and insects, are clearly detected in images of 5 mm-thick chocolate. The bone structures in 20 mm-thick chicken wings are also imaged in real-time.

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T. Genta, H. Tashima, R. Shimokita, S. Arai, and M. Fukuda "Development of a real-time optical imaging system for monitoring food quality and assessing human body parts using diffused light", Proc. SPIE 8550, Optical Systems Design 2012, 85500F (18 December 2012); https://doi.org/10.1117/12.980257

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KEYWORDS

Near infrared

Light scattering

Scattering

Absorption

Imaging systems

CMOS sensors

Real time imaging

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