Aluminized screen

Aluminized screen may refer to a type of cathode ray tube (CRT) for video display or to a type of projection screen for showing motion pictures or slides, especially in polarized 3D.

Some cathode ray tubes, e.g., television picture tubes, include a thin layer of aluminium deposited on the back surface of their internal phosphor screen coating.

Light from an excited area of the phosphor which would otherwise wastefully shine back into the tube, is instead reflected forward through the phosphor coating, increasing the total visible light output by around a factor of two.

Some projection screens have an aluminized surface, usually an aluminium paint rather than a metal sheet.

Audience members wear polarized glasses that allow only the correct image to be seen by each eye.