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.

The answer is pretty obvious when you think it through, but that doesn’t mean that you can’t put the principle ... Ulbricht sphere, don’t worry — it’s also known as an integrating ...

A detector then responds to a portion of the sphere wall energy to derive a significant value about the average hemispherical reflectance of the sample. Using the principles of an integrating sphere, ...