Design of a Novel Noninvasive Blood Glucose Monitor Based on Improved Holography Concave Grating NIR-Spectrometer

Real-time monitoring of blood glucose concentration (BGC) is an efficient way to prevent diabetes. And the noninvasive detection of BGC has been becoming a popular study point. In order to overcome some limitations and improve the performances of the noninvasive BGC detection based on spectroscopy, a novel blood glucose monitor (BGM) based on an improved NIR-spectrometer is designed in this paper. Meanwhile, a custom-built spectrometer for BGM based on the holography concave grating is developed. In order to eliminate the stray-light and improve the performances of the BGM, the grooves are delineated and black-painted on the inner-wall of the spectrometer. In addition, the linear CCD with combined data acquisition (DAQ) card and the virtual-spectrometer based on Lab VIEW are used as the spectrum acquisition hardware and software-platform unit. Experimental results show that the wavelength range, resolution and spectral quality of the BGM are improved. The wavelength range of the BGM is 300-1000nm; its resolution can reach 1nm. Therefore, the BGM has the potential values in the research of the diabetes and BGC detection.