Patent ID: 11880104
Assignee: 3M INNOVATIVE PROPERTIES COMPANY
Field: Computer technology (Electrical engineering)
Classification: CPC G  A | IPC G

Claim 5:
6. The display system of claim 1, wherein for substantially normally incident light and for the second polarization state, the reflective polarizer has an average optical transmittance T1 in a third wavelength range extending from about 425 nm to about 650 nm; and
wherein for the second polarization state and for light incident on the reflective polarizer at an angle of incidence of about 60 degrees in a plane of incidence parallel to the second polarization state, the optical transmittance of the reflective polarizer comprises a second band edge separating the third wavelength range from a fourth wavelength range extending at least from about 850 nm to about 1100 nm, a best linear fit to the second band edge correlating the optical transmittance to wavelength at least across a wavelength range where the optical transmittance increases from about 20% to about 80% having a slope of greater than about 3%/nm and an r-squared value of greater than about 0.9, a best second order polynomial fit to the optical transmittance in the third wavelength range having a negative second order coefficient and an r-squared value of greater than about 0.9, the reflective polarizer having an average optical transmittance T2 in the third wavelength range from about 15% to about 35% and an average optical transmittance in the fourth wavelength range greater than about 80%, T1−T2≥10%.