Abstract: A cloaking device includes an object-side, an image-side and a cloaked region between the object side and image-side. An object-side half Fresnel lens, an image-side half Fresnel lens and a planar reflection boundary positioned between the object-side half Fresnel lens and the image-side half Fresnel lens are included. The object-side half Fresnel lens and the image-side half Fresnel lens each comprise an inward facing surface and an outward facing Fresnel surface. The planar reflection boundary comprises an inward facing mirror surface. Light from an object positioned on the object-side of the cloaking device and obscured by the cloaked region is redirected around the cloaked region by the object-side half Fresnel lens, planar reflection boundary and image-side half Fresnel lens to form an image of the object on the image-side of the cloaking device such that the light from the object appears to pass through the cloaked region.

Abstract: A cloaking device includes an object-side, an image-side and a cloaked region between the object-side and the image-side. An object-side polyhedron with an entrance side and an exit side parallel to the entrance side is positioned on the object-side and an image-side polyhedron with an entrance side and an exit side parallel to the entrance side is positioned on the image-side. The entrance side of the object-side polyhedron is oriented relative to a reference optical axis extending between the object-side and the image-side at an acute angle ? and the exit side of the image-side polyhedron is oriented relative to the reference optical axis at an oblique angle equal to 180°??. Light from an object positioned on the object-side of the cloaking device is redirected around the cloaked region, without total internal reflection of the light within the object-side polyhedron or the image-side polyhedron.

Abstract: A cloaking device includes an object-side, an image-side, a cloaked region (CR) between the object-side and the image-side, and a reference optical axis extending from the object-side to the image-side. An object-side CR reflection boundary and an object-side optical component sub-assembly are positioned on the object-side and an image-side CR reflection boundary and an image-side optical component sub-assembly are positioned on the image-side. The object-side optical component sub-assembly includes an object-side outward-positioned half-mirror, an object-side inward-positioned half-mirror, and at least one of an object-side outward-positioned reflection boundary and an object-side half-wave plate. The image-side optical component sub-assembly includes an image-side outward-positioned half-mirror, an image-side inward-positioned half-mirror, and at least one of an image-side outward-positioned reflection boundary and an image-side half-wave plate.

Abstract: A transparent radiative cooling film includes an ultraviolet/infrared (UV/IR) cut layer and a radiative cooling layer extending across the UV/IR cut layer. The UV/IR cut layer may be formed by alternating layers of oxide and metal and/or by a color filter layer. The radiative cooling layer includes an oxide. The UV/IR cut layer is transparent to a first range of electromagnetic radiation in the visible spectrum, reflects or absorbs a second range of electromagnetic radiation in the UV spectrum, and reflects a third range of electromagnetic radiation in the IR spectrum. The radiative cooling layer is transparent to the first range of electromagnetic radiation in the visible spectrum and emits a fourth range of electromagnetic radiation in the IR spectrum with wavelengths between about 7.0 micrometers and about 18 micrometers such that the transparent radiative cooling film preserves the color of a surface while passively cooling the surface.

Abstract: A cloaking device includes an object-side, an image-side, a cloaked region (CR) between the object-side and the image-side, and a reference optical axis extending from the object-side to the image-side. An object-side CR reflection boundary and an object-side optical component sub-assembly are positioned on the object-side and an image-side CR reflection boundary and an image-side optical component sub-assembly are positioned on the image-side. The object-side optical component sub-assembly includes an object-side outward-positioned half-mirror, an object-side inward-positioned half-mirror, and at least one of an object-side outward-positioned reflection boundary and an object-side half-wave plate. The image-side optical component sub-assembly includes an image-side outward-positioned half-mirror, an image-side inward-positioned half-mirror, and at least one of an image-side outward-positioned reflection boundary and an image-side half-wave plate.

Abstract: A cloaking device includes an object-side, an image-side, and a cloaked region (CR) between the object-side and the image-side. An object-side CR reflection boundary, an object-side half-mirror, and an object-side external reflection boundary are positioned on the object-side, and an image-side CR reflection boundary, an image-side half-mirror, and an image-side external reflection boundary are positioned on the image-side. The object-side half-mirror and the object-side external reflection boundary are spaced apart and generally parallel to the object-side CR reflection boundary, and the image-side half-mirror and the image-side external reflection boundary are spaced apart and generally parallel to the image-side CR reflection boundary. Light from an object located on the object-side of the cloaking device and obscured by the CR is redirected around the CR via two optical paths to form an image of the object on the image-side of the cloaking device.

Abstract: A cloaking device includes an object-side, an image-side, a cloaked region (CR) between the object-side and the image-side, and a reference optical axis extending from the object-side to the image-side. An object-side CR reflection boundary, an object-side half-mirror, and an object-side color filter are positioned on the object side and an image-side CR reflection boundary, an image-side half-mirror, and an image-side color filter are positioned on the image-side. The object-side half-mirror and the object-side color filter are spaced apart from and positioned generally parallel to the object-side CR reflection boundary, and the image-side half-mirror and the image-side color filter are spaced apart from and positioned generally parallel to the image-side CR reflection boundary. Light from an object located on the object-side of the cloaking device and obscured by the CR propagates via three optical paths to form an image of the object on the image-side of the cloaking device.

Abstract: A cloaking device includes an object-side, an image-side and a cloaked region between the object-side and the image-side. An object-side polyhedron with an entrance side and an exit side parallel to the entrance side is positioned on the object-side and an image-side polyhedron with an entrance side and an exit side parallel to the entrance side is positioned on the image-side. The entrance side of the object-side polyhedron is oriented relative to a reference optical axis extending between the object-side and the image-side at an acute angle ? and the exit side of the image-side polyhedron is oriented relative to the reference optical axis at an oblique angle equal to 180°??. Light from an object positioned on the object-side of the cloaking device is redirected around the cloaked region, without total internal reflection of the light within the object-side polyhedron or the image-side polyhedron.

Abstract: A cloaking device includes object-side and image-side curved cloaking region boundaries with outward facing mirror surfaces and inward facing opaque surfaces. A cloaking region is bounded by the inward facing opaque surfaces of the object-side and image-side curved CR boundaries. An object-side curved reflection boundary with an inward facing mirror surface is positioned proximate to the object-side curved cloaking region boundary and an image-side curved reflection boundary with an inward facing mirror surface is positioned proximate to the image-side curved cloaking region boundary. Light from an object located on the object-side of the cloaking device and obscured by the cloaking region is redirected around the cloaking region by the outward facing mirror surfaces of the object-side and image-side curved cloaking region boundaries and the inward facing mirror surfaces of the object-side and image-side curved reflection boundaries.

Abstract: A cloaking device includes object-side and image-side curved cloaking region boundaries with outward facing mirror surfaces and inward facing opaque surfaces. A cloaking region is bounded by the inward facing opaque surfaces of the object-side and image-side curved CR boundaries. An object-side curved reflection boundary with an inward facing mirror surface is positioned proximate to the object-side curved cloaking region boundary and an image-side curved reflection boundary with an inward facing mirror surface is positioned proximate to the image-side curved cloaking region boundary. Light from an object located on the object-side of the cloaking device and obscured by the cloaking region is redirected around the cloaking region by the outward facing mirror surfaces of the object-side and image-side curved cloaking region boundaries and the inward facing mirror surfaces of the object-side and image-side curved reflection boundaries.

Abstract: According to one or more embodiments described herein, a cloaking device may comprise a first mirror, a second mirror, a third mirror, and a fourth mirror. The cloaking device may further comprise a first lens, a second lens, a third lens, and a fourth lens. Each of the first lens, the second lens, the third lens, and the fourth lens may be achromatic cylindrical lenses, or each of the first lens, the second lens, the third lens, and the fourth lens may be acylindrical lenses.

Abstract: An anti-glare panel includes a panel with a length and a plurality of alternating black color and non-black color strips extending along the length of the panel. A plurality of lenticular lenses extend along the length of the panel and over the plurality of alternating black color strips and non-black color strips. A single lenticular lens array extends over a pair of a black color strip and a non-black color strip. The plurality of lenticular lenses reflect light from the black color strips within a veiling glare range and reflect light from the non-black color strips outside of the veiling glare range.