I have taken a few spectroscopy images of the white light of a halogen bulb as viewed directly, and through a pair of normal (polarised) brown-tinted sunglasses, and through the EnChroma Cx 15 lenses. Here's the direct halogen spectrum, unfiltered: (Ignore the streak on the left-hand side - the interesting bit is the rainbow on the right.) This is the spectrum as seen through the normal sunglasses - you can see that they suppress all wavelengths more or less uniformly: And here's the view through the EnChroma lenses - you can see that they have two very distinct bands where virtually all light is blocked out, while other wavelengths pass with very little attenuation : I've also shot a short video showing the effect - you should have no trouble working out when the normal sunglasses and the EnChroma lenses come between the light and the spectroscope: Continue reading...
