The sphere, by nature of its internal diffuse (Lambertian) reflection and integration of the energy, is insensitive to directional reflectance characteristics coming from the sample, and thus, offers ...

It’s an age-old riddle: if you have a perfect sphere with a perfectly reflective inner surface, will light bounce around inside it forever? The answer is pretty obvious when you think it through ...

To do the job justice that requires what’s known in the business as an integrating sphere (aka an Ulbricht sphere), but being a specialist device, it’s a bit pricey for the home gamer.