Ultrasonic-assisted point one-shot mid-infrared Fourier spectroscopy for realization of ear-clip-type non-invasive blood glucose sensors: ultra-miniature point one-shot mid-infrared spectroscopic imager (diameter: 10 mm; thickness: 25 mm) configured using a single lens (1st report)

Natsumi Kawashima; Tomoya Kitazaki; Kosuke Nogo; Hanyue Kang; Akira Nishiyama; Kenji Wada; Ichiro Ishimaru

doi:10.1117/12.2509109

20 February 2019 Ultrasonic-assisted point one-shot mid-infrared Fourier spectroscopy for realization of ear-clip-type non-invasive blood glucose sensors: ultra-miniature point one-shot mid-infrared spectroscopic imager (diameter: 10 mm; thickness: 25 mm) configured using a single lens (1st report)

Natsumi Kawashima, Tomoya Kitazaki, Kosuke Nogo, Hanyue Kang, Akira Nishiyama, Kenji Wada, Ichiro Ishimaru

Author Affiliations +

Proceedings Volume 10885, Optical Diagnostics and Sensing XIX: Toward Point-of-Care Diagnostics; 108850U (2019) https://doi.org/10.1117/12.2509109
Event: SPIE BiOS, 2019, San Francisco, California, United States

Abstract

We propose the point one-shot mid-infrared Fourier spectroscopic imager, which is composed of only a single Ge lens (diameter: 6 mm; thickness: 5 mm) and a two-dimensional array device. The lens is a nonspherical lens on the front side and a dual-axis inclined wedge prism at the rear side. The objective beams, which have different optical path lengths because of the effects of the prism, are imaged using the array device and we obtain a two-dimensional spatial fringe pattern. We can improve the wavelength resolution analytically by connecting the same optical path difference (OPD) pixels of the horizontal lines at different rows, even though we use low-resolution cameras.

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Natsumi Kawashima, Tomoya Kitazaki, Kosuke Nogo, Hanyue Kang, Akira Nishiyama, Kenji Wada, and Ichiro Ishimaru "Ultrasonic-assisted point one-shot mid-infrared Fourier spectroscopy for realization of ear-clip-type non-invasive blood glucose sensors: ultra-miniature point one-shot mid-infrared spectroscopic imager (diameter: 10 mm; thickness: 25 mm) configured using a single lens (1st report)", Proc. SPIE 10885, Optical Diagnostics and Sensing XIX: Toward Point-of-Care Diagnostics, 108850U (20 February 2019); https://doi.org/10.1117/12.2509109

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KEYWORDS

Cameras

Mid-IR

Imaging systems

Fourier spectroscopy

Imaging spectroscopy

Spectroscopy

Sensors

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