Adaptive light: a lighting control method aligned with dark adaptation of human vision

摘要

Lighting device and experimental environment. ( ) Emission spectra of lamp-colour light and blue-white light were measured using a PMA-11 Multi-channel spectrometer (Hamamatsu Photonics, Hamamatsu, Shizuoka, Japan). ( ) The linearity between the PWM ratio and the illuminance at 100 cm from the lighting device (lamp-colour light, measured by the illuminance meter LUX HiTESTER 3423, Hioki, Nagano, Japan). ( ) The examination rooms. The examination rooms were compartments in a large, dark room, separated by black curtains. When two subjects participated in the experiment, a black curtain was used to separate the compartment into two compartments, where the light conditions were controlled independently. ( ) A switch box with “brightened” and “darkened” buttons to ascertain the timing of when subjects perceived the change in illuminance. When pressed twice or more within one second, it was treated as one time. The timing when the switch was pressed was recorded using a voltage logger (LR8431, Hioki).