A wireless handheld spectrometer that is smartphone-compatible could make it easier and more economical to acquire spectral images of everyday objects and in the future could be used for point-of-care medical diagnosis in remote locations. The device can detect wavelengths from 400 to 676 nm. A white LED array lamp is used as the light source. The wavelength resolution of the spectrometer is about 17 nm. Rather than using a smartphone camera to acquire images, the new spectrometer uses a commercially available CMOS camera that wirelessly transmits images to a smartphone. Using this...Read full articleRelated content from Photonics MediaARTICLESPortable Biosensor Uses Light at Nanoscale to Detect Sepsis in MinutesTime is critical when diagnosing sepsis, but the tests currently used to identify this disease can take up to 72 hours. 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