Design And Study Of Multifunctional Illumination Sensors Based On Spectral Analysis

In this article, we present a design method for multifunctional illumination sensors, which can simultaneously detect blue light hazard, circadian rhythm, as well as scotopic and photopic vision based on spectral analysis. We showed that illumination sensors for blue light hazard, circadian rhythm, scotopic vision, and photopic vision can be fabricated based on attaching the Si photodiode S5981 to the bandpass filters DTB435, DTB470, DTB500, and DTB545 with a thickness of 4 mm. The deviations of the central wavelengths of their response curves from those of the four response functions of the human eye are 3, 11, -3, and -8 nm; the corresponding deviations of the full widths at half maximum are 16, 5, 1, and -7 nm, and the corresponding relative deviations of the integrals over the visible wavelength range of 380-780 nm are 32.0%, 15.2%, 4.5%, and 1.9%. The average absolute and relative errors of the values measured with our self-made photopic vision illumination sensor in ten independent measurements are 7.82 lx and 1.77%, respectively. Six kinds of light sources were measured with the circadian rhythm illumination sensor, and all relative errors are less than 5%, and the average value is 2.63%. The experimental results showed that this design method is feasible, and the research can provide a reference for enriching optical bioluminescence sensors.