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High precision spectra captured by a spectral camera and suppression of their nonlinearity
JOSA A- received 02/20/2024; accepted 04/22/2024; posted 04/24/2024; Doc. ID 521937
- Abstract: The high sensitivity of photoplethysmography (PPG) spectral signals provides conditions for extracting dynamicspectra carrying nonlinear information. By the idea of spatial conversion precision, this article innovatively uses aspectral camera to collect highly sensitive spectral data of 24 wavelengths, proposes a method for extracting dynamicspectra of three different optical path lengths and their joint modeling. In the experiment, the models of the red bloodcells and white blood cells established by the joint spectra achieved good results, the correlation coefficients were above0.77. This study has great significance for achieving high-precision non-invasive quantitative analysis of human bloodcomponents.