Disclosed are a reflective color filter substrate and driving method thereof, and a display panel and a display device. The substrate includes color-resist elements in an array, each color-resist element includes a first and second electrode arranged opposite to each other, and a color-resist structure located between the first and second electrodes; and in each color-resist element: the first electrode is a light-transmission electrode; the first and second electrodes are configured to generate a first electric field, and the color-resist elements are configured to be driven by the first electric field to reflect light rays incident on the first electrode as monochromatic light; and the first and second electrodes are configured to generate a second electric field, and the color-resist elements are configured to be driven by the second electric field to reflect the light rays incident on the first electrode as hybrid light of monochromatic light and white light.

Discloses are a display panel, a method of manufacturing the same and a display device. The display panel includes: a first substrate; a second substrate disposed opposite to the first substrate; and a reflective structure group disposed on the first substrate, the reflective structure group includes a plurality of reflective structures in one-to-one correspondence with visual fields of view, and a reflective surface of each reflective structure of the reflective structures faces the second substrate, and the reflective structure is configured to reflect light from the second substrate in a predetermined direction to a corresponding field of view.

A photogrammetry target includes a base including a first base side, configured to be fixedly mounted directly to a surface of a component, and a convex second base side opposite the first base side. The convex second base side is defined by a dome. The photogrammetry target further includes a plurality of retroreflective targets fixedly mounted to the dome. Each retroreflective target of the plurality of retroreflective targets includes a retroreflective surface facing a direction which is different than each other retroreflective surface of the plurality of retroreflective targets.

A photogrammetry target includes a base including a first base side, configured to be fixedly mounted directly to a surface of a component, and a convex second base side opposite the first base side. The convex second base side is defined by a dome. The photogrammetry target further includes a plurality of retroreflective targets fixedly mounted to the dome. Each retroreflective target of the plurality of retroreflective targets includes a retroreflective surface facing a direction which is different than each other retroreflective surface of the plurality of retroreflective targets.

Apparatus and methods for laser bond inspection (LBI) of internal bonds in a composite structure with limited access. The technology solves the problem of access for an LBI process head through selection of optics, an articulated optical path and simplification of the method of collecting debris. A small-format process head is specifically designed for laser bond inspection in limited-access spaces. This process head allows access to locations within ½ inch of a nearby wall or structure and utilizes a laser beam that is much smaller (˜2-3 mm) in diameter. The apparatus incorporates articulated joints to improve access to locations in the structure being inspected. The process head may also be configured to protect the optical elements (e.g., the focusing lens) from blow-back of debris from the LBI inspection process.

Apparatus and methods for laser bond inspection (LBI) of internal bonds in a composite structure with limited access. The technology solves the problem of access for an LBI process head through selection of optics, an articulated optical path and simplification of the method of collecting debris. A small-format process head is specifically designed for laser bond inspection in limited-access spaces. This process head allows access to locations within ½ inch of a nearby wall or structure and utilizes a laser beam that is much smaller (˜2-3 mm) in diameter. The apparatus incorporates articulated joints to improve access to locations in the structure being inspected. The process head may also be configured to protect the optical elements (e.g., the focusing lens) from blow-back of debris from the LBI inspection process.

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.

The invention provides a reflector (2) comprising a reflector wall (20), the reflector wall (20) comprising a first wall surface (22) and a second wall surface (23) defining said reflector wall (20), the reflector wall (20) comprising a light transmissive material (21), wherein the reflector wall (20) has a first dimension (d1) and a second dimension (d2) defining a first reflector wall area, wherein each wall surface (22,23) comprises a plurality of parallel arranged elongated corrugations (210), wherein the corrugations have corrugation heights (h2) relative to recesses (220) between adjacent corrugations (210) and corrugation widths (w2) defined by the distance between adjacent recesses (220) at the respective wall surfaces (22,23), wherein the corrugations (210) have curved corrugation surfaces (230) between said adjacent recesses (220) having corrugation radii (r2) at the respective wall surfaces (22,23), and wherein over at least part of one of the first dimension (d1) and the second dimension (d2) one or more of (i) the corrugation heights (h2), (ii) the corrugation widths (w2), (iii) the corrugation radii (r2), and (iv) a shortest top-top distance (w12) of corrugations tops (211) configured at different wall surfaces (22,23) vary over said wall dimension (d1,d2) for at least one of the wall surfaces (22,23). The reflector (2) has a first end (3) and a second end (4), wherein a third distance (d3) between the first end (3) and the second end (4) is bridged by one or more reflector walls (20), wherein the one or more reflector walls (20) are configured tapering from the second end (4) to the first end (3), and wherein the reflector (2) has a reflector cavity (5).

The invention provides a reflector (2) comprising a reflector wall (20), the reflector wall (20) comprising a first wall surface (22) and a second wall surface (23) defining said reflector wall (20), the reflector wall (20) comprising a light transmissive material (21), wherein the reflector wall (20) has a first dimension (d1) and a second dimension (d2) defining a first reflector wall area, wherein each wall surface (22,23) comprises a plurality of parallel arranged elongated corrugations (210), wherein the corrugations have corrugation heights (h2) relative to recesses (220) between adjacent corrugations (210) and corrugation widths (w2) defined by the distance between adjacent recesses (220) at the respective wall surfaces (22,23), wherein the corrugations (210) have curved corrugation surfaces (230) between said adjacent recesses (220) having corrugation radii (r2) at the respective wall surfaces (22,23), and wherein over at least part of one of the first dimension (d1) and the second dimension (d2) one or more of (i) the corrugation heights (h2), (ii) the corrugation widths (w2), (iii) the corrugation radii (r2), and (iv) a shortest top-top distance (w12) of corrugations tops (211) configured at different wall surfaces (22,23) vary over said wall dimension (d1,d2) for at least one of the wall surfaces (22,23). The reflector (2) has a first end (3) and a second end (4), wherein a third distance (d3) between the first end (3) and the second end (4) is bridged by one or more reflector walls (20), wherein the one or more reflector walls (20) are configured tapering from the second end (4) to the first end (3), and wherein the reflector (2) has a reflector cavity (5).

A method for manufacturing an optical element includes forming an optical element unit comprised of an optical material such as glass and having an outer shape of a regular triangle or a regular hexagon, arranging a plurality of optical element units two-dimensionally on a substrate so as to have a structure imitating a molecular structure of graphene or a carbon nanotube, and processing the substrate on which the plurality of optical element units are mounted into a desired surface shape.