Patent ID: 8879150

Claim:
A bandpass filter and polarizer, comprising: a first stack of layers, wherein the first stack of layers is configured to exhibit a first stop band for s-polarized radiation incident on the first stack of layers at an oblique angle between a first cut-on radiation wavelength and a first cut-off radiation wavelength, and wherein the first stack of layers is further configured to exhibit a second stop band for p-polarized radiation incident on the first stack of layers at said oblique angle between a second cut-on radiation wavelength and a second cut-off radiation wavelength; and a second stack of layers, wherein the second stack of layers is configured to exhibit a third stop band for s-polarized radiation incident on the second stack of layers at said oblique angle between a third cut-on radiation wavelength and a third cut-off radiation wavelength, and wherein the second stack of layers is further configured to exhibit a fourth stop band for p-polarized radiation incident on the second stack of layers at said oblique angle between a fourth cut-on radiation wavelength and a fourth cut-off radiation wavelength; wherein said second cut-on radiation wavelength is less than said first cut-on radiation wavelength; wherein said third cut-off radiation wavelength is less than said fourth cut-off radiation wavelength; wherein said first cut-on radiation wavelength is approximately equal to or larger than said third cut-off radiation wavelength; and wherein said second cut-on radiation wavelength is less than said fourth cut-off radiation wavelength.