Abstract: The optical device for measuring at least one of reflected light (BRDF) and transmitted light (BTDF) from a sample, in all spherical directions of space around the sample, for each spherical direction of incident light includes a light source, and a goniophotometer configured to measure at least one of: directions of the incident light in spherical coordinates, and directions of the reflected light in spherical coordinates. The device further includes a dispersive screen, and a multi-sensor imaging device. The goniophotometer includes a first articulated arm supporting the light source; and a second articulated arm supporting the sample or a sample holder.

Abstract: The lighting equipment comprises a lighting device with a plurality of light sources for delivering white light having a tunable light spectrum, and a monitoring and control device that controls the light sources in a modulation cycle for modulating the light spectrum, which cycle comprises a first period where the light spectrum is red-enriched, a second period where the light spectrum is gradually modulated from red to blue, a third period where the light spectrum is blue-enriched, and a fourth period where the light spectrum is modulated gradually from blue to red. The control device is arranged to detect reception of a signal indicating a human presence, and, in response, reinitializes the modulation cycle when the modulation cycle is in the first period, or gradually modulates the light spectrum from blue to red when the modulation cycle is in the second, third or fourth period before reinitializing the modulation cycle.