Spectrum filtering for visual displays and imaging having minimal angle dependence

摘要

An optical spectrum filtering device, e.g., color filter, having reduced angle dependence is provided that comprises an interference filter assembly comprising a high refractive index dielectric material, such as a Fabry-Perot based resonator structure. The filter assembly is capable of transmitting a portion of an electromagnetic spectrum into the dielectric material to generate a filtered output with a predetermined range of wavelengths that displays minimal angle dependence, when viewed from a range of incidence angles ranging from normal (0°) to 90°. Methods of making minimal angle dependent optical spectrum filters and reducing angle dependence for such devices are also provided.

主权项

1. An optical spectrum filtering device comprising:
an interference filter assembly comprising a dielectric material having a refractive index of greater than about 1.5 disposed between a pair of parallel reflective surfaces; wherein the filter assembly is capable of transmitting a portion of an electromagnetic spectrum to generate a filtered output having a predetermined range of wavelengths that displays minimal angle dependence so that the predetermined range of wavelengths varies less than or equal to about 50 nm from an incidence angle of 0 to an incidence angle of 90°.