During the analysis, he noticed that the appearance of Saturn's rings in the mid-infrared part of the spectrum was totally different from what is seen in the visible light (sciencedaily.com)
The hybrid photochemical and thermochemical catalyst used for the experiment was based on titanium dioxide, a white powder that can not absorb the entire visible light spectrum. (sciencedaily.com)
Digital camera sensors are capable of capturing some of the infrared light from the array's Dot Projector, but it is outside the usual visible light spectrum the eye is capable of seeing. (appleinsider.com)