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Pencil-like imaging spectrometer for bio-samples sensing.

Fuhong Cai1, Dan Wang2,3, Min Zhu4

  • 1Department of Electrical Engineering, Mechanical and Electrical Engineering College, Hainan University, Haikou 570228, China.

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|January 4, 2018
PubMed
Summary
This summary is machine-generated.

This study presents a portable, wireless imaging spectrometer built with a WIFI-camera. This cost-effective device enables on-site spectral analysis of bio-samples like fruit and meat.

Keywords:
(120.0120) Instrumentation, measurement, and metrology(300.0300) Spectroscopy

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Area of Science:

  • Biophotonics
  • Spectroscopy
  • Imaging Technology

Background:

  • Spectrally-resolved imaging is crucial for bio-sample analysis.
  • Existing techniques can be complex and costly.
  • There is a need for portable, user-friendly spectral imaging devices.

Purpose of the Study:

  • To develop a compact, wireless imaging spectrometer using a WIFI-camera.
  • To demonstrate its capability for analyzing various bio-samples.
  • To explore its potential for on-site applications and future machine learning integration.

Main Methods:

  • Assembled a pencil-like imaging spectrometer (140 g, 3.1 cm x 15.5 cm) using a WIFI-camera as the detector.
  • Utilized a white LED array lamp for illumination (400 nm - 675 nm spectral range).
  • Employed a smartphone or computer for wireless data reception and processing.

Main Results:

  • Achieved a wavelength resolution of approximately 17 nm.
  • Successfully obtained repeatable 2D spectral images of bananas, meat, and human hands.
  • Captured 3D spectral image data cubes of human hands with high signal-to-noise ratio in 16 seconds.

Conclusions:

  • The developed portable imaging spectrometer is cost-effective (<$300) and easy to assemble.
  • Its wireless and smartphone-compatible nature facilitates on-site bio-sample analysis.
  • Future applications include object recognition through spectral classification with machine learning.