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17 March 2016Experimental study on synergistic effects of reflectance and transmittance for near infrared spectroscopy
Usually, diffused reflectance or diffused transmittance has been collected respectively when performing the near-infrared spectroscopic measurements. However, glucose-relative spectral signal is quite weak due to the noises from the measuring system and the environment. Previous Monte-Carlo simulation results from our group showed that the spectral magnitude of both diffused reflectance and diffused transmittance can reach the same order. In this talk, it is our aim to further investigate the synergistic effect of diffused reflectance and diffused transmittance for Near Infrared spectral measurements. The diffused reflectance spectra and diffused transmittance spectra of human’s earlobe have been obtained simultaneously by home-made optical probes within the wavelength of 1100-1400nm. Two processing methods---Superposition Method and Division Method are introduced to demonstrate the synergistic effect of reflectance and transmittance. Both of the processing methods are performed on diffused reflectance and diffused transmittance in accordance with corresponding wavelengths. The results show that the combination of diffused reflectance and transmittance can effectively enhances the SNR by reducing the interference caused by individual differences and measuring environmental factors. Moreover, comparatively, the Division Method has a more distinguished effect.
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Jingying Jiang, Jiajia Liu, Congcong Ma, Lin Li, Junsheng Lu, Kexin Xu, "Experimental study on synergistic effects of reflectance and transmittance for near infrared spectroscopy," Proc. SPIE 9707, Dynamics and Fluctuations in Biomedical Photonics XIII, 970714 (17 March 2016);