Mid-infrared passive spectroscopic imaging for non-invasive blood glucose sensor (2nd. report): pea-sized (diameter: 6mm, length: 14mm) one-shot passive spectrometer for smartwatch

Daichi Anabuki; Tomoya Kitazaki; Shiori Tahara; Yusuke Morimoto; Akira Nishiyama; Kenji Wada; Akiko Nishimura; Ichiro Ishimaru

doi:10.1117/12.3007505

20 September 2023 Mid-infrared passive spectroscopic imaging for non-invasive blood glucose sensor (2nd. report): pea-sized (diameter: 6mm, length: 14mm) one-shot passive spectrometer for smartwatch

Daichi Anabuki, Tomoya Kitazaki, Shiori Tahara, Yusuke Morimoto, Akira Nishiyama, Kenji Wada, Akiko Nishimura, Ichiro Ishimaru

Author Affiliations +

Proceedings Volume 12608, Biomedical Imaging and Sensing Conference; 126080A (2023) https://doi.org/10.1117/12.3007505
Event: Optics and Photonics International Congress, 2023, Yokohama, Japan

Abstract

We developed a one-shot passive Fourier spectrometer to integrate with wearable devices for non-invasive blood glucose measurements. The apparatus was designed with a N.A. of 0.77 for passive spectroscopy of the living body. The field curvature due to the increased N.A. was improved by combining an imaging lens with a phase shifter. Because the apparatus was configured with two lenses, the transmission was high and the optical axis length was 14 mm. In addition, the apparatus was equipped with a multi-slit to prevent loss of interference sharpness. The multi-slit was designed with 5 lines with aperture patterns that enabled the detection of glucose. We measured a blackbody to evaluate the apparatus.

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Daichi Anabuki, Tomoya Kitazaki, Shiori Tahara, Yusuke Morimoto, Akira Nishiyama, Kenji Wada, Akiko Nishimura, and Ichiro Ishimaru "Mid-infrared passive spectroscopic imaging for non-invasive blood glucose sensor (2nd. report): pea-sized (diameter: 6mm, length: 14mm) one-shot passive spectrometer for smartwatch", Proc. SPIE 12608, Biomedical Imaging and Sensing Conference, 126080A (20 September 2023); https://doi.org/10.1117/12.3007505

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