Light shielding articles and electromagnetic receivers and/or emitters including the same

A light shielding article comprising:

• a) a first multilayer optical film comprised of at least a plurality of alternating first and second polymeric optical layers collectively reflecting at an incident light angle of at least one of 0°, 15°, 30°, 45°, 60°, or 75°, an average of at least 70, 80, 90, or 95 percent of incident visible light over at least a wavelength range from 400 nm to 700 nm, the multilayer optical film having a first major surface;
• and
• b) a barrier coating disposed on the first major surface of the multilayer optical film, the barrier coating comprising:
• at least one dyad comprised of a (co)polymer layer overlaying the first major surface of the multilayer optical film and an inorganic layer overlaying the (co)polymer layer;
• and an outer (co)polymer layer overlaying the at least one dyad;
• and optionally, at least one outer inorganic layer overlaying the outer (co)polymer layer;
• wherein the light shielding article transmits at an incident light angle of at least one of 0°, 15°, 30°, 45°, 60°, or 75°, an average of at least 70, 80, 90, or 95 percent of incident radio frequency waves in at least one wavelength range from 1 mm to 10 mm, 10 mm to 100 mm, or 100 mm to 1000 mm, and
• wherein the light shielding article transmits, at an incident light angle of at least one of 0°, 15°, 30°, 45°, 60°, or 75°, an average of at most 50, 60, or 70 percent of incident ultraviolet light over at least a 30-nanometer wavelength reflection bandwidth in a wavelength range from 190 nm to 400 nm.