A new wireless handheld spectrometer could make it practical to obtain spectral images of daily objects. The new device can detect wavelengths in the range of 400 to 676 nanometers at 186 spots simultaneously.
The device can detect oxygen concentration in the blood, calculates the quality of meat and identifying fruit that is the perfect ripeness.
In the study, the researchers describe how to make the new pencil-like spectrometer and demonstrate its ability to acquire spectral images of bananas, pork and a person’s hand.
“The easiest way to use a spectrometer is to wave it over the part of the body or object being examined,” said first author Fuhong Cai, Hainan University, China.
The new spectrometer uses a CMOS camera that transmits images wirelessly to a smartphone. This approach helps the researchers to build a cylindrical spectral imaging device.
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