A reflector unit may behave as a retroreflector to reflect light of a selected color. The reflector unit may comprise a first reflector having a first color, a second reflector having a second color, and a mask that either allows incoming light to reach the first reflector and not the second reflector or allows incoming light to reach the second reflector and not the first reflector. An active light unit may emit light of a particular color in response to receiving light. In this fashion, the active light unit may simulate the operation of a reflector. The reflector unit and the active light unit may operate on a bi-directional vehicle.

A retroreflective sheeting which comprises a front sheet of an optically transmissive material and a reflective back sheet bonded to the front sheet. The front sheet includes a plurality of parallel channels defining surfaces which reflect light using a total internal reflection and configured to retroreflect high-incidence-angle light rays at least in one plane. The retroreflective sheeting may have a plurality of retroreflective areas with different orientations of the channels and/or different retroreflective properties with respect to light incident onto the retroreflective sheeting at high incidence angles.

A retroreflective sheeting which comprises a front sheet of an optically transmissive material and a reflective back sheet bonded to the front sheet. The front sheet includes a plurality of parallel channels defining surfaces which reflect light using a total internal reflection and configured to retroreflect high-incidence-angle light rays at least in one plane. The retroreflective sheeting may have a plurality of retroreflective areas with different orientations of the channels and/or different retroreflective properties with respect to light incident onto the retroreflective sheeting at high incidence angles.

Provided is a processing method for a multi-row, multi-column flat lens with an equivalent negative refractive index, which includes: performing photoresist coating, masking and exposure on the photolithography surface; removing photoresist in an unexposed block, and forming a rectangular groove; coating a surface of an exposed block and all surfaces of the rectangular groove with a protective layer, and then coating a side surface of the rectangular groove with a reflective film; removing the protective layer on the surface of the exposed block and the bottom surface of the rectangular groove, then filling up the groove with a filling material, and further processing the front and rear surfaces of the parallel plate in such a manner that a parallel misalignment between the front and rear surfaces thereof is smaller than 1′; and adding a protective window sheet on each of the front and rear surfaces of the new parallel plate.

An aerial display apparatus includes: a display device which includes a display surface on which a first image is displayed, and which emits display light from the display surface; a mirror device which is disposed obliquely with respect to the display surface of the display device, which reflects the display light that has been emitted from the display device to form an aerial image at a position that is plane-symmetrical to the display device; and a display device which is disposed between the mirror device and the aerial image, which allows the display light that has been reflected by the mirror device to be transmitted therethough, and which displays a second image.

This specification relates to a decoration member including: a substrate; a pattern layer comprising two or more unit pattern provided on one surface of the substrate; and an inorganic layer formed on the pattern layer, in which the inorganic layer includes a region in which a thickness t(x) of the inorganic layer formed on each unit pattern increases in a direction x in which the unit patterns are arranged.

An aerial display apparatus includes a display device (22) which includes a display surface on which an image is displayed, and which emits display light from the surface, a light control device (40) which includes a plurality of transparent regions (41) and a plurality of light-shielding regions (42) that are arranged in an alternating manner and are obliquely disposed with respect to a first direction that is orthogonal to the surface, and which allows the light that has been made incident on the region (41) to be transmitted therethrough, and shields the light that has been made incident on the region (42), and a mirror device (10) which is disposed in parallel to the surface, which reflects the light that has been transmitted through the device (40), and which forms an aerial image (30) at a position that is plane-symmetrical to the device (22).

The disclosure relates to an optical security feature that is based on a single axis alignment of mirrors or facets in a structured surface that forms a micro mirror array. In an aspect, a device is described that includes a reflecting structure on a first layer, where the reflecting structure has a top surface with multiple embossed facets arranged in a spatial orientation that produces a flat ring optical effect upon incidence of light. In another aspect, a method for making the device is described that provides a reflecting layer and produces the reflecting structure on the reflecting layer with multiple facets arranged in the spatial orientation to produce the flat ring optical effect. In yet another aspect, an apparatus for making the device is described that includes a pressing device and a stamping device to transfer a pattern of the reflecting structure to a reflecting material.

A device includes first and second electrodes that are at least partially transparent in a spectral domain; an electroluminescent layer that lies between the first and second electrodes suitable for emitting electromagnetic radiation in the spectral domain, the electromagnetic radiation being circularly polarized in a first polarization direction; a structured substrate, the first electrode lying between the structured substrate and the electroluminescent layer, the structured substrate including features that are reflective in the spectral domain, and that possess a hollow geometric shape configured so that electromagnetic radiation that passes through the first electrode is reflected from the reflective features while preserving the first polarization direction, a filler material that is transparent in the spectral domain and that is arranged to fill the reflective features so that the structured substrate has a planar surface.

The present disclosure relates to a decoration member comprising a color developing layer comprising a light reflective layer and a light absorbing layer provided on the light reflective layer; and a substrate provided on one surface of the color developing layer, wherein the light absorbing layer comprises a molybdenum-titanium oxide (Mo.sub.aTi.sub.bO.sub.x).