Durable cover articles with optical band-pass filtering for sensors

A cover article comprising:

• a substrate comprising an outer primary surface and an inner primary surface, wherein the outer and inner primary surfaces are opposite of one another;
• and
• an outer layered film comprising an outermost surface disposed on the outer or inner primary surface of the substrate,
• wherein the outer layered film comprises a plurality of alternating high refractive index and low refractive index layers,
• wherein each of the low refractive index layers comprises a silicon oxide,
• wherein each of the high refractive index layers comprises a silicon nitride, a silicon oxynitride, TiO2, Nb2O5, Ta2O5, or ZrO2 and has a refractive index greater than a refractive index of each of the low refractive index layers,
• wherein the outer layered film has a total physical thickness from about 500 nm to 12,000 nm,
• wherein the outer layered film comprises a plurality of periods (N), each period (N) comprising a low refractive index layer and a high refractive index layer, and the plurality of periods (N) is from 5 to 100 periods,
• wherein the cover article has at least two non-overlapping wavelength bands, each band having a bandwidth from 5 nm to 200 nm and a central wavelength within a spectrum from 400 nm to 1200 nm, and
• further wherein the cover article exhibits, for each of the at least two non-overlapping wavelength bands, (a) an average two-surface transmittance of greater than 70% within a range of incident angles from 0° to 20° and (b) an average two-surface transmittance of less than 50% within a range of incident angles from 20° to 90°.

A cover article comprising:

• a substrate comprising an outer primary surface and an inner primary surface, wherein the outer and inner primary surfaces are opposite of one another;
• and
• an outer layered film comprising an outermost surface disposed on the outer or inner primary surface of the substrate,
• wherein the outer layered film comprises a plurality of alternating high refractive index and low refractive index layers,
• wherein each of the high refractive index layers comprises a nitride, an oxynitride, TiO2, Nb2O5, Ta2O5, or ZrO2, and has a refractive index greater than a refractive index of each of the low refractive index layers,
• wherein the outer layered film comprises a scratch resistant layer comprising a nitride, an oxynitride, TiO2, Nb2O5, Ta2O5, or ZrO2, and has a physical thickness from about 150 nm to 10,000 nm,
• wherein the outer layered film has a total physical thickness from about 500 nm to 12,000 nm,
• wherein the cover article has at least two non-overlapping wavelength bands, each band having a bandwidth from 5 nm to 200 nm and a central wavelength within a spectrum from 400 nm to 1200 nm, and
• further wherein the cover article exhibits, for each of the at least two non-overlapping wavelength bands, (a) an average two-surface transmittance of greater than 70% within a range of incident angles from 0° to 20° and (b) an average two-surface transmittance of less than 50% within a range of incident angles from 20° to 90°.

A cover article comprising:

• a substrate comprising an outer primary surface and an inner primary surface, wherein the outer and the inner primary surfaces are opposite of one another;
• and
• an outer layered film comprising an outermost surface disposed on the outer or inner primary surface of the substrate,
• wherein the outer layered film comprises a plurality of alternating high refractive index and low refractive index layers,
• wherein each of the high refractive index layers has a refractive index greater than a refractive index of each of the low refractive index layers,
• wherein the cover article has a transmission wavelength band, the transmission wavelength band having a bandwidth from 5 nm to 200 nm and a central wavelength of from 510 nm to 590 nm, and
• further wherein the cover article exhibits, for the transmission wavelength band, (a) an average two-surface transmittance of greater than 70% within a range of incident angles from 0° to 10° or within a range of incident angles from 0° to 20° and (b) an average two-surface transmittance of less than 50% within a range of incident angles from 300 to 900 or within a range of incident angles from 50° to 90°.