| CPC G02B 6/0056 (2013.01) [G02B 6/0026 (2013.01); G02B 6/0053 (2013.01)] | 5 Claims |
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1. An optical construction comprising an optical film disposed between, and bonded to, first and second structured films, the first and second structured films comprising respective pluralities of regularly arranged first and second structures comprising respective pluralities of first and second peaks facing away from each other and the optical film,
such that for a substantially collimated incident light beam propagating in an incident plane and incident at an incident location on the optical construction at a first incident angle of greater than about 5 degrees and defines a bisecting plane that comprises the incident location and is orthogonal to the incident plane, and for at least a first wavelength in a first wavelength range extending from about 420 nm to about 1200 nm, and for at least a first polarization state, the optical construction has:
an optical transmission S1 along a first transmission direction that makes a first angle with the bisecting plane when the incident light is on a same first side of the bisecting plane as the first transmission direction; and
an optical transmission S2 along the first transmission direction when the incident light is on an opposite second side of the bisecting plane as the first transmission direction, S2/S1 ≥1.5.
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