Brown sunglasses effectively filter blue light due to their color spectrum properties, absorbing blue wavelengths while reflecting brown and orange hues. Green sunglasses, positioned in the middle of the spectrum, filter less blue light compared to brown. Polarizing lenses, which block horizontal light, operate on a different principle than color-based filtering. The Maui Jim HCL bronze lenses demonstrate greater contrast than grey or green lenses, enhancing visual clarity by filtering specific light frequencies.
PREREQUISITESOptical engineers, eyewear designers, photographers, and consumers seeking to understand the benefits of different sunglasses in filtering blue light and enhancing visual clarity.
Calaver said:From what I've seen from looking a few things up, it looks like that rose colored sunglasses also filter blue light. In addition, orange colored safety googles filter UV light. If you think of the electromagnetic spectrum, or even rainbows for that matter, this begins to make sense. Brown (just a darker shade of orange typically), orange, and red light all lie to one side of the spectrum, while blue and UV light are on the other side. And light is either reflected or absorbed when it hits a surface; what is reflected is not absorbed and vice versa. So, what happens with orange (or brown) or red colored things is that they reflect orange (or brown) or red and absorb blue and possibly (depending on the material) UV light. In the end, this results in you seeing the reflected light, and not seeing the absorbed light when you look at the object.
I'm not sure about green, as it lies more in the middle of the spectrum so I hypothesize that it would filter less blue light than brown sunglasses.
Also, if you're looking at polarizing lenses, that's a whole different concept.
It's a similar effect but polarization doesn't necessarily depend on the color of the lens. For instance, here are some red lenses that are (advertised to be) polarized:jlcd said:Yes. It's polarizing lenses. I initially got the brown.. the visual is clearer than average because it's supposedly filter all blue (removing all haze).. but I changed it to green because brown only good for older people. But it's same concept as what you described above. Is it not? I know polarizing lens block all horizontal light.. but this is separate from the colors and blue filtering?
It's worth while pointing our that it's not so much an 'elimination' of all planes but one because that would end up with very little light getting through. When light passes through a polariser, the polariser selects just the component of the wave(s) in a particular plane. It actually let's through half of the energy of unpolarised light.Calaver said:polarization deals with eliminating all but one plane of vibration for electromagnetic waves. R