An optical filter

摘要

The present invention is directed to an optical filter, having a dielectric reflective layer capable of reflecting at least 70% of radiation in an undesired wavelength region while transmitting a predetermined proportion of light in a desired wavelength region, wherein the dielectric reflective layer comprises a set of first polymer layers comprising a first polymer in combination with a set of second polymer layers comprising a second polymer having a refractive index different from the first polymer, wherein the first polymer layers and the second polymer layers are alternately stacked; and an EMI shielding layer disposed on the dielectric reflective layer.