A device comprising: an optical component comprising: a substrate; a microlens array disposed on a surface of the substrate; and a harmful species protection barrier film (420, 520, 620, 720, 820) system; wherein, at least part of the barrier film conformally covers the microlens array, wherein the at least part of the barrier film that conformally covers the microlens array comprises two surfaces, a first surface facing towards the microlens array and a second surface facing away from the microlens array, and wherein the microlens array comprises two surfaces, a first surface facing toward the surface of the substrate and a second surface facing away from the surface of the substrate, and wherein a contour of the second surface of the at least part of the barrier film that conformally covers the microlens array substantially matches a contour of the second surface of the microlens array; an OLED optically coupled to the microlens array, and disposed below the substrate on an opposite side to the microlens array, wherein a height of the at least part of the barrier film that conformally covers the microlens array, measured as a difference between a highest point of the second surface of the at least part of the barrier film that conformally covers the microlens array relative to the surface of the substrate and a lowest point of the second surface of the at least part of the barrier film that conformally covers the microlens array relative to the surface of the substrate, is substantially the same as a maximum height of the microlens array measured relative to the surface of the substrate. an optical component comprising: a substrate; a microlens array disposed on a surface of the substrate; and a harmful species protection barrier film (420, 520, 620, 720, 820) system; wherein, at least part of the barrier film conformally covers the microlens array, a substrate; a microlens array disposed on a surface of the substrate; and a harmful species protection barrier film (420, 520, 620, 720, 820) system; wherein, at least part of the barrier film conformally covers the microlens array, wherein the at least part of the barrier film that conformally covers the microlens array comprises two surfaces, a first surface facing towards the microlens array and a second surface facing away from the microlens array, and wherein the microlens array comprises two surfaces, a first surface facing toward the surface of the substrate and a second surface facing away from the surface of the substrate, and wherein a contour of the second surface of the at least part of the barrier film that conformally covers the microlens array substantially matches a contour of the second surface of the microlens array; an OLED optically coupled to the microlens array, and disposed below the substrate on an opposite side to the microlens array, wherein a height of the at least part of the barrier film that conformally covers the microlens array, measured as a difference between a highest point of the second surface of the at least part of the barrier film that conformally covers the microlens array relative to the surface of the substrate and a lowest point of the second surface of the at least part of the barrier film that conformally covers the microlens array relative to the surface of the substrate, is substantially the same as a maximum height of the microlens array measured relative to the surface of the substrate. wherein the microlens array comprises two surfaces, a first surface facing toward the surface of the substrate and a second surface facing away from the surface of the substrate, and wherein a contour of the second surface of the at least part of the barrier film that conformally covers the microlens array substantially matches a contour of the second surface of the microlens array; an OLED optically coupled to the microlens array, and disposed below the substrate on an opposite side to the microlens array, wherein a height of the at least part of the barrier film that conformally covers the microlens array, measured as a difference between a highest point of the second surface of the at least part of the barrier film that conformally covers the microlens array relative to the surface of the substrate and a lowest point of the second surface of the at least part of the barrier film that conformally covers the microlens array relative to the surface of the substrate, is substantially the same as a maximum height of the microlens array measured relative to the surface of the substrate.