Nature Publishing Group
We report a miniature, visible to near infrared G-Fresnel spectrometer that contains a complete spectrograph system, including the detection hardware and connects with a smartphone through a microUSB port for operational control. The smartphone spectrometer is able to achieve a resolution of ~5 nm in a wavelength range from 400 nm to 1000 nm. We further developed a diffuse reflectance spectroscopy system using the smartphone spectrometer and demonstrated the capability of hemoglobin measurement. Proof of concept studies of tissue phantoms yielded a mean error of 9.2% on hemoglobin concentration measurement, comparable to that obtained with a commercial benchtop spectrometer. The smartphone G-Fresnel spectrometer and the diffuse reflectance spectroscopy system can potentially enable new point-of-care opportunities, such as cancer screening.
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Edwards, Perry; Zhang, Chenji; Zhang, Baigang; Hong, Xiangqian; Nagarajan, Vivek K.; Yu, Bing; and Liu, Zhiwen, "Smartphone Based Optical Spectrometer for Diffusive Reflectance Spectroscopic Measurement of Hemoglobin" (2017). Biomedical Engineering Faculty Research and Publications. 641.
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