Patent ID: 9562999
Date: 2017-02-07
CPC Classifications: G02B

Claim:
1. An optical film comprising: a polarizer configured to linearly polarize a first light to provide a linearly polarized light component; a first semi-transmissive film on the polarizer, configured to transmit the linearly polarized light component, and configured to reflect a first circularly polarized component of a second light, the first circularly polarized component of the second light having a first wavelength; and a second semi-transmissive film on the first semi-transmissive film, configured to transmit the linearly polarized light component, and configured to reflect a second circularly polarized component of the second light, the second circularly polarized component of the second light having a second wavelength that is unequal to the first wavelength, wherein the first semi-transmissive film is disposed on the polarizer.