The discussion centers on the behavior of linearly polarized light when reflected from various surfaces, specifically paper and metallic coatings. It is established that diffuse reflection from rough surfaces, such as paper, randomizes the polarization of light. In contrast, metallic surfaces can maintain polarization states, which is crucial for applications like 3D cinema that utilize polarization effects. The presence of dichroism, optical rotation, and multiple reflections also influences polarization retention.
PREREQUISITESOptical physicists, engineers in the field of photonics, filmmakers, and anyone involved in the design of projection systems or studying the properties of polarized light.
Yeah, this is what I heard today, as well. That diffuse reflection does randomize the polarization, but that if you have some metal coating, the polarization can be preserved. I was told that's why, like you said, 3D cinema can't just use any projection screen, but one with a metallic layer on top of it. So I guess paper randomizes polarization, while a mirror would preserve it, even if reflection was diffuse.Andy Resnick said:It's true some 3-D cinema uses polarization effects- but those also require use of a metallic 'scrim', which is why the polarization states are maintained. Scattering off a rough dielectric will randomize the polarization.