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20 September 2023 Mid-infrared passive spectroscopic imaging for non-invasive blood glucose sensor (3rd. report): broad band (3-20μm) reflective optics spectroscopic imager with micro-bolometer array sensor
Hibiki Yano, Haruto Adachi, Yusuke Morimoto, Akira Nishiyama, Kenji Wada, Akiko Nishimura, Ichiro Ishimaru
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Proceedings Volume 12608, Biomedical Imaging and Sensing Conference; 1260805 (2023) https://doi.org/10.1117/12.3005587
Event: Optics and Photonics International Congress, 2023, Yokohama, Japan
Abstract
We had already reported that blood glucose levels of internal bodies were able to be measured by the proposed mid-infrared (LWIR: 8-14μm) passive spectroscopic imager from a distance. The mid-infrared passive spectroscopic imager, whose sensitivity is very high because of the proposed multi-slit array technology, is able to detect and analyze radiations from body heats. Expanding the wavelength region to 3 to 20μm will realize the measurement of lactic acids and ketone bodies. Lactic acid levels, whose emission peak are 5.65μm etc., are an indicator of fatigue. Ketone bodies, whose emission peak are 4.65μm etc., are an indicator of metabolic effects of dieting. On the other hand, transmission type lens requires AR(Anti-reflection) coating whose band pass is theoretically narrow around 8 to 14μm. But our passive spectroscopic imager is able to be constructed by the wavelength-independent reflection optics. In this report, we mentioned the broad band, whose wavelength was 3 to 20μm, reflective optics spectroscopic imager using free-form mirror lens units (provided by NALUX Co., Ltd.) with a micro-bolometer array sensor.
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Hibiki Yano, Haruto Adachi, Yusuke Morimoto, Akira Nishiyama, Kenji Wada, Akiko Nishimura, and Ichiro Ishimaru "Mid-infrared passive spectroscopic imaging for non-invasive blood glucose sensor (3rd. report): broad band (3-20μm) reflective optics spectroscopic imager with micro-bolometer array sensor", Proc. SPIE 12608, Biomedical Imaging and Sensing Conference, 1260805 (20 September 2023); https://doi.org/10.1117/12.3005587
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KEYWORDS
Imaging spectroscopy
Spectroscopy
Imaging systems
Reflectance spectroscopy
Sensors
Mid-IR
Biological imaging
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