Taking into account the functional relationship between visible radiation and its effects on human circadian system, an optical sensor system has been developed with capability of bio-miming human visual and non-visual stimuli by means of a simultaneous monitoring of particular radiation frequencies for indoor lighting. This optical sensor system is made of 5 photodiodes equipped with passband optical filters, based on sputtered AlN-Ag interferential layers and having the maximum transmission peak positioned at the response wavelengths of the human photoreceptors (cones, rods and ganglion cells). When exposed to different light sources this photosensor system is able to qualify the responses of the five photoreceptors, useful to evaluate lighting quality both as visual and non-visual effects are concerned.
Measuring light by circadian sensors
Castaldo A.;Ferrara M.;Antonaia A.;
2018-01-01
Abstract
Taking into account the functional relationship between visible radiation and its effects on human circadian system, an optical sensor system has been developed with capability of bio-miming human visual and non-visual stimuli by means of a simultaneous monitoring of particular radiation frequencies for indoor lighting. This optical sensor system is made of 5 photodiodes equipped with passband optical filters, based on sputtered AlN-Ag interferential layers and having the maximum transmission peak positioned at the response wavelengths of the human photoreceptors (cones, rods and ganglion cells). When exposed to different light sources this photosensor system is able to qualify the responses of the five photoreceptors, useful to evaluate lighting quality both as visual and non-visual effects are concerned.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
