Polarizing film, also known as polarizing filter, is a thin layer of material that only transmits light waves that vibrate in one direction, known as polarized light. It blocks light that vibrates in other directions. Polarizing film is commonly made from stretched polymer materials with embedded iodine or dichroic substances that selectively absorb light depending on its oscillation ... https://timessquarereporter.com/others/the-pros-and-cons-of-using-polarizing-film-in-photography-and-beyond