OPTICAL POLARIZING FILMS WITH DESIGNED COLOR SHIFTS DEPENDING ON THE ANGLE OF INCIDENCE, THE FILMS HAVING SUBSTANTIALLY NO REFLECTION BANDS IN THE VISIBLE SPECTRUM FOR NORMALLY INCIDENT LIGHT

摘要

Multilayer films are provided that exhibit a colored appearance when viewed at an oblique angle as a result of one or more reflection bands in the visible region of the spectrum. The films however provide no substantial reflection bands in either the visible or near infrared regions for light normally incident on the film. The films can be made to shift from clear at normal incidence to an arbitrary designed color at an oblique angle without necessarily becoming cyan.