Ms. Natsumi Kawashima Profile

Natsumi Kawashima

Researcher at National Metrology Institute of Japan

SPIE Involvement:

Author

Publications (16)

Proceedings Article | 19 July 2019 Paper

Ultra-miniature (diameter: 6 mm, thickness: 5 mm) low-cost (price: 1,000 EUR) point-one-shot mid-infrared Fourier spectroscopic imager for ear clip type non-invasive blood glucose sensors

Natsumi Kawashima, Satoru Adachi, Tomoya Kitazaki, Hanyue Kang, Akira Nishiyama, Kenji Wada, Ichiro Ishimaru

Proceedings Volume 11073, 110730H (2019) https://doi.org/10.1117/12.2526371

KEYWORDS: Fourier spectroscopy, Imaging spectroscopy, Spectroscopes, Blood, Glucose, Mid-IR, Cameras, Sensors, Objectives, Imaging systems

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Proceedings Article | 12 July 2019 Presentation + Paper

Palm-sized and tough two-dimensional spectroscopic imager: the so-called hyperspectral camera for visible and mid-infrared light (first report): trial applications of the proposed two-dimensional Fourier spectroscopic imager

Ichiro Ishimaru, Hanyue Kang, Natsumi Kawashima, Tomoya Kitazaki, Jyunya Iwaki, Satoru Adachi, Sora Mizutani, Kotone Yokoyama

Proceedings Volume 11058, 110580V (2019) https://doi.org/10.1117/12.2525654

KEYWORDS: Spectroscopy, Imaging spectroscopy, Mid-IR, Imaging systems, Cameras, Fourier spectroscopy, Visible radiation, Interferometers, FT-IR spectroscopy, Mirrors

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Proceedings Article | 21 June 2019 Paper

Palm-sized and tough two-dimensional spectroscopic imager: the so-called hyperspectral camera for visible and mid-infrared light. Proposal of plant-species identification regardless of zenith and azimuth angles based on only two types of basic spectroscopic data (near-surface and internal reflectance)

Hanyue Kang, Natsumi Kawashima, Sora Mizutani, Tomoya Kitazaki, Satoru Adachi, Jyunya Iwaki, Kotone Yokoyama, Ichiro Ishimaru

Proceedings Volume 11059, 110590K (2019) https://doi.org/10.1117/12.2525950

KEYWORDS: Spectroscopy, Reflectivity, Imaging spectroscopy, Reflection, Visible radiation, Reflectance spectroscopy, Imaging systems, Hyperspectral imaging

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SPIE Journal Paper | 8 March 2019 Open Access

Parametric standing wave generation of a shallow reflection plane in a nonrigid sample for use in a noninvasive blood glucose monitor

Tomoya Kitazaki, Natsumi Kawashima, Naoyuki Yamamoto, Hiroyuki Nomura, Hanyue Kang, Akira Nishiyama, Kenji Wada, Ichiro Ishimaru

JBO, Vol. 24, Issue 03, 036003, (March 2019) https://doi.org/10.1117/12.10.1117/1.JBO.24.3.036003

KEYWORDS: Ultrasonics, Reflection, Glucose, Blood, Absorption, Spectroscopy, Mid-IR, Sensors, Absorbance, Optical coherence tomography

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Proceedings Article | 20 February 2019 Paper

Ultrasonic-assisted point-one-shot mid-infrared Fourier spectroscopy for realization of ear-clip type non-invasive blood glucose sensors: ultrasonic-assisted method for production of a reflection plane near the skin surface and detection of the blood glucose absorption peak in mice (2nd report)

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

Proceedings Volume 10885, 108850V (2019) https://doi.org/10.1117/12.2509124

KEYWORDS: Glucose, Blood, Mid-IR, Fourier spectroscopy, Ultrasonics, Reflection, Absorption, Spectroscopy, Sensors, Skin

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Proceedings Article | 20 February 2019 Paper

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

Proceedings Volume 10885, 108850U (2019) https://doi.org/10.1117/12.2509109

KEYWORDS: Cameras, Mid-IR, Imaging systems, Fourier spectroscopy, Imaging spectroscopy, Spectroscopy, Sensors, Glucose, Spectroscopes, Blood

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SPIE Journal Paper | 22 May 2018 Open Access

Ultrasonic standing wave preparation of a liquid cell for glucose measurements in urine by midinfrared spectroscopy and potential application to smart toilets

Naoyuki Yamamoto, Natsumi Kawashima, Tomoya Kitazaki, Keita Mori, Hanyue Kang, Akira Nishiyama, Kenji Wada, Ichiro Ishimaru

JBO, Vol. 23, Issue 05, 050503, (May 2018) https://doi.org/10.1117/12.10.1117/1.JBO.23.5.050503

KEYWORDS: Ultrasonics, Glucose, Liquids, Spectroscopy, Reflection, Refractive index, Absorption, Water, Optical coherence tomography, Fourier spectroscopy

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Proceedings Article | 28 July 2017 Paper

Proposal of ultrasonic-assisted mid-infrared spectroscopy for incorporating into daily life like smart-toilet and non-invasive blood glucose sensor

Tomoya Kitazaki, Keita Mori, Naoyuki Yamamoto, Congtao Wang, Natsumi Kawashima, Ichiro Ishimaru

Proceedings Volume 10412, 1041204 (2017) https://doi.org/10.1117/12.2284658

KEYWORDS: Mid-IR, Glucose, Spectroscopy, Blood, Sensors, Ultrasonics, Wave sensors, Cameras

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SPIE Journal Paper | 30 November 2016 Open Access

Sensitivity improvement of one-shot Fourier spectroscopic imager for realization of noninvasive blood glucose sensors in smartphones

Natsumi Kawashima, Kosuke Nogo, Satsuki Hosono, Akira Nishiyama, Kenji Wada, Ichiro Ishimaru

OE, Vol. 55, Issue 11, 110506, (November 2016) https://doi.org/10.1117/12.10.1117/1.OE.55.11.110506

KEYWORDS: Spectroscopy, Fourier spectroscopy, Imaging spectroscopy, Imaging systems, Objectives, Sensors, Blood, Beam expanders, Glucose, Light sources

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Proceedings Article | 12 May 2016 Paper

Built-in hyperspectral camera for smartphone in visible, near-infrared and middle-infrared lights region (third report): spectroscopic imaging for broad-area and real-time componential analysis system against local unexpected terrorism and disasters

Satsuki Hosono, Natsumi Kawashima, Dirk Wollherr, Ichiro Ishimaru

Proceedings Volume 9855, 985506 (2016) https://doi.org/10.1117/12.2223409

KEYWORDS: Spectroscopy, Chemical analysis, Cameras, Imaging spectroscopy, Visible radiation, Near infrared spectroscopy, Imaging systems, Fourier spectroscopy, Mid-IR, Motion estimation, Reflection, Sensors

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Proceedings Article | 12 May 2016 Paper

Built-in hyperspectral camera for smartphone in visible, near-infrared and middle-infrared lights region (second report): sensitivity improvement of Fourier-spectroscopic imaging to detect diffuse reflection lights from internal human tissues for healthcare sensors

Natsumi Kawashima, Satsuki Hosono, Ichiro Ishimaru

Proceedings Volume 9855, 985505 (2016) https://doi.org/10.1117/12.2223392

KEYWORDS: Spectroscopy, Imaging spectroscopy, Cameras, Fourier spectroscopy, Mid-IR, Objectives, Visible radiation, Sensors, Glucose, Imaging systems, Medicine, Absorbance

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We proposed the snapshot-type Fourier spectroscopic imaging for smartphone that was mentioned in 1st. report in this conference. For spectroscopic components analysis, such as non-invasive blood glucose sensors, the diffuse reflection lights from internal human skins are very weak for conventional hyperspectral cameras, such as AOTF (Acousto-Optic Tunable Filter) type. Furthermore, it is well known that the spectral absorption of mid-infrared lights or Raman spectroscopy especially in long wavelength region is effective to distinguish specific biomedical components quantitatively, such as glucose concentration. But the main issue was that photon energies of middle infrared lights and light intensities of Raman scattering are extremely weak. For improving sensitivity of our spectroscopic imager, the wide-field-stop & beam-expansion method was proposed. Our line spectroscopic imager introduced a single slit for field stop on the conjugate objective plane. Obviously to increase detected light intensities, the wider slit width of the field stop makes light intensities higher, regardless of deterioration of spatial resolutions. Because our method is based on wavefront-division interferometry, it becomes problems that the wider width of single slit makes the diffraction angle narrower. This means that the narrower diameter of collimated objective beams deteriorates visibilities of interferograms. By installing the relative inclined phaseshifter onto optical Fourier transform plane of infinity corrected optical systems, the collimated half flux of objective beams derived from single-bright points on objective surface penetrate through the wedge prism and the cuboid glass respectively. These two beams interfere each other and form the infererogram as spatial fringe patterns. Thus, we installed concave-cylindrical lens between the wider slit and objective lens as a beam expander. We successfully obtained the spectroscopic characters of hemoglobin from reflected lights from human fingers.

Proceedings Article | 12 May 2016 Paper

Built-in hyperspectral camera for smartphone in visible, near-infrared and middle-infrared lights region (first report): trial products of beans-size Fourier-spectroscopic line-imager and feasibility experimental results of middle-infrared spectroscopic imaging

Ichiro Ishimaru, Natsumi Kawashima, Satsuki Hosono

Proceedings Volume 9855, 985504 (2016) https://doi.org/10.1117/12.2223353

KEYWORDS: Spectroscopy, Imaging spectroscopy, Visible radiation, Imaging systems, Objectives, Glasses, Cameras, Mid-IR, Infrared spectroscopy, Fourier spectroscopy, Interferometers, Fourier transforms, Phase shifts

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Proceedings Article | 7 March 2016 Presentation + Paper

Thumb-size ultrasonic-assisted spectroscopic imager for in-situ glucose monitoring as optional sensor of conventional dialyzers

Kosuke Nogo, Keita Mori, Wei Qi, Satsuki Hosono, Natsumi Kawashima, Akira Nishiyama, Kenji Wada, Ichiro Ishimaru

Proceedings Volume 9699, 96990N (2016) https://doi.org/10.1117/12.2213629

KEYWORDS: Blood, Spectroscopy, Imaging spectroscopy, Glucose, Imaging systems, Ultrasonics, Light scattering, Scattering, Plasma, Sensors, Fourier spectroscopy, Oscillators, Particles

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SPIE Journal Paper | 19 February 2016 Open Access

Ultraminiature one-shot Fourier-spectroscopic tomography

Shun Sato, Wei Qi, Natsumi Kawashima, Kosuke Nogo, Satsuki Hosono, Akira Nishiyama, Kenji Wada, Ichiro Ishimaru

OE, Vol. 55, Issue 02, 025106, (February 2016) https://doi.org/10.1117/12.10.1117/1.OE.55.2.025106

KEYWORDS: Phase shifts, Tomography, Imaging spectroscopy, Spectroscopes, Spectroscopy, Imaging systems, Phase interferometry, Glasses, Fourier transforms, Optical tomography

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Proceedings Article | 12 March 2015 Paper

Palm-size wide-field Fourier spectroscopic imager with uncooled infrared microbolometer arrays for smartphone

Natsumi Kawashima, Yo Suzuki, Wei Qi, Satsuki Hosono, Tsubasa Saito, Satoshi Ogawa, Shun Sato, Masaru Fujiwara, Akira Nishiyama, Kenji Wada, Naotaka Tanaka, Ichiro Ishimaru

Proceedings Volume 9314, 93140Q (2015) https://doi.org/10.1117/12.2078151

KEYWORDS: Imaging spectroscopy, Spectroscopy, Mid-IR, Fourier spectroscopy, Microbolometers, Infrared radiation, Infrared imaging, Imaging systems, Interferometers, Objectives

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Proceedings Article | 12 March 2015 Paper

Proposal of snapshot line-imaging Fourier spectroscopy for smartphone

Natsumi Kawashima, Shun Sato, Akane Ishida, Daichi Inohara, Naotaka Tanaka, Kenji Wada, Akira Nishiyama, Masaru Fujiwara, Ichiro Ishimaru

Proceedings Volume 9314, 93140P (2015) https://doi.org/10.1117/12.2078039

KEYWORDS: Fourier spectroscopy, Fringe analysis, Glasses, Image acquisition, Imaging spectroscopy, Interferometers, Fourier transforms, Spectroscopy, Image analysis, Medicine

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Showing 5 of 16 publications

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