Dichroic Glass – The word dichroic comes from two Greek roots: “di” meaning two and “chroma” meaning colors. The name refers to the way in which the glass can shift colors, displaying multiple hues depending on your angle of viewing and ambient lighting conditions. In the more modern era, dichroic glass as we know it today came directly from research conducted by NASA and its numerous contractors. The solution was called chameleon glass, and it was intended to protect astronauts from the negative effects and harsh glare of unfiltered sunlight. Used in dichroic filters, this coated glass also acted as a shield against cosmic radiation.