Patent ID: 11960683
Assignee: 3M INNOVATIVE PROPERTIES COMPANY
Field: Optics (Instruments)
Classification: CPC G | IPC F  G

Claim 11:
12. The display system of claim 1, further comprising an optically diffusive film disposed between the reflective polarizer and the sensor, the optically diffusive film comprising:
an optical substrate layer;
a second optically diffusive layer disposed on the optical substrate layer and facing the reflective polarizer and comprising a plurality of nanoparticles dispersed therein, wherein for a substantially normally incident light and a visible wavelength range from about 450 nm to about 650 nm and an infrared wavelength range from about 930 nm to about 970 nm, the second optically diffusive layer has an average specular transmittance Vs in the visible wavelength range and an average specular transmittance Is in the infrared wavelength range, Is/Vs>2.5; and
a structured optical layer disposed on the optical substrate layer and facing away from the reflective polarizer and comprising a structured major surface facing away from the optical substrate layer and comprising a plurality of spaced apart elongated structures elongated along a same first direction and arranged at a substantially uniform density across the structured major surface of the structured optical layer.