Patent ID: 8982462
Filing Date: 2015-03-17
Classification: B42D,G02B,G02F,Y10T

Abstract:
1. A multilayer optical film, comprising: a plurality of interior layers arranged to selectively reflect light by constructive or destructive interference, the layers extending from a first zone to a second zone of the film; wherein in the first zone the plurality of layers provides a reflective polarizer characteristic such that normally incident light of one polarization state is substantially reflected and normally incident light of an orthogonal polarization state is substantially transmitted; wherein in the second zone the plurality of layers provides a mirror characteristic such that normally incident light of any polarization state is substantially reflected; and wherein the film has a first thickness in the first zone and a second thickness in the second zone, and the first thickness is substantially the same as the second thickness wherein at least a portion of materials in the first zone is birefringent, and at least a portion of materials in the second zone is birefringent and an absolute magnitude of birefringence in the portion of materials in the second zone is relatively less than an absolute magnitude of birefringence in the portion of materials in the first zone.