Ultraviolet-C (UV-C) radiation shielding films including a substrate made of a fluoropolymer, a multilayer optical film disposed on a major surface of the substrate, and a heat-sealable encapsulant layer disposed on a major surface of the multilayer optical film opposite the substrate. The multilayer optical film is made of at least a multiplicity of alternating first and second optical layers collectively reflecting at an incident light angle of at least one of 0°, 30°, 45°, 60°, or 75°, at least 30 percent of incident ultraviolet light over at least a 30-nanometer wavelength reflection bandwidth in a wavelength range from at least 100 nanometers to 280 nanometers. The ultraviolet light shielding film may be applied to a major surface of a photovoltaic device, such as a component of a satellite or an unmanned aerial vehicle. Methods of making the UV-C radiation-protective films also are disclosed.

The present disclosure relates to adhesives useful in preventing drifting during lamination of light redirecting films applied to photovoltaic cells. The adhesives of the present disclosure have other useful applications in bonding and/or affixing other solar energy components.

A lidar system includes one or more light sources configured to generate a first beam of light and a second beam of light, a scanner configured to scan the first and second beams of light across a field of regard of the lidar system, and a receiver configured to detect the first beam of light and the second beam of light scattered by one or more remote targets. The scanner includes a rotatable polygon mirror that includes multiple reflective surfaces angularly offset from one another along a periphery of the polygon mirror, the reflective surfaces configured to reflect the first and second beams of light to produce a series of scan lines as the polygon mirror rotates. The scanner also includes a pivotable scan mirror configured to (i) reflect the first and second beams of light and (ii) pivot to distribute the scan lines across the field of regard.

An interference filter includes a transmissive first substrate including a first inner surface and a first outer surface facing each other, in which the first inner surface is provided with a first reflection film, a transmissive second substrate including a second inner surface and a second outer surface facing each other, in which the second inner surface is provided with a second reflection film, a first bonding portion configured to bond the first inner surface and the second inner surface to each other, and seal a first inner space between the first substrate and the second substrate, a transmissive third substrate facing the first outer surface, a second bonding portion configured to bond the first outer surface and the third substrate to each other, and seal a second inner space between the first substrate and the third substrate, a transmissive fourth substrate facing the second outer surface, and a third bonding portion configured to bond the second outer surface and the fourth substrate to each other, and seal a third inner space between the second substrate and the fourth substrate, wherein the first inner space, the second inner space, and the third inner space are lower in pressure than atmospheric pressure.

A method for assembling an electro-optic mirror reflective element for a vehicular rearview mirror assembly includes providing a container having a plurality of holes for dispensing spacer beads, supporting the container over a dispensing area via an electrically powered shaking device, positioning a glass substrate at the dispensing area, and automatically shaking the container so that spacer beads fall through the holes in the container and onto the glass substrate. The shaking of the container is controlled so that the shaking device is deactivated after an appropriate amount of spacer beads are dispensed onto the glass substrate. The glass substrate is mated with another glass substrate with the dispensed spacer beads between the glass substrates and bounded by a perimeter seal. The cavity between the glass substrates is filled with an electro-optic medium, and the cavity is sealed with the electro-optic medium and spacer beads disposed therein.

An optical mirror assembly includes a crystalline face sheet and a carbon fiber sandwich. The crystalline face sheet has a first surface configured to reflect light and a second surface coupled to the carbon fiber sandwich by a layer of epoxy. The carbon fiber sandwich is configured to structurally support the crystalline face sheet. The carbon fiber sandwich includes a first carbon fiber layer, a second carbon fiber layer and a substrate positioned between the first carbon fiber layer and the second carbon fiber layer.

A metasurface includes a plurality of Bragg mirrors, each having a defect cavity therein, arrayed in a grid. A heat source is provided for each of the plurality of Bragg mirrors. Each heat source is positioned to selectively modulate heat applied to its respective Bragg mirror and to impart a different phase shift via the applied heat from the heat source.

Alight scanning apparatus according to the present invention includes a deflecting unit configured to deflect a light flux to scan a scanned surface in a main scanning direction, and an imaging optical system configured to guide the light flux deflected by the deflecting unit to the scanned surface and to have different partial magnifications in the main scanning direction between an on-axis image height and an outermost off-axis image height. A ratio of a reflectivity at a first outermost off-axis deflection point on one side with respect to an on-axis deflection point on a deflecting surface of the deflecting unit to that at the on-axis deflection point, and a ratio of the reflectivity at a second outermost off-axis deflection point on the other side with respect to the on-axis deflection point on the deflecting surface to that at the on-axis deflection point are each appropriately set.

A biaxially oriented polyester reflection film according to an embodiment of the present invention includes: a core layer having a plurality of voids, and containing homo-polyester, copolymer polyester, a resin incompatible with polyester, and inorganic particles; and a skin layer formed at least one surface of the core layer, and containing homo-polyester, copolymer polyester, and inorganic particles, wherein the biaxially oriented polyester reflection film is formed to have a plurality of light focusing structures, each of which has a concave center portion, and which are arranged in a grid pattern.

Provided are a decorative film including a reflective layer which consists of a dielectric multi-layer film and develops a color due to an optical interference or a structural color, in which the dielectric multi-layer film has a plurality of regions having different reflection performances in an in-plane direction, at least one of the plurality of regions is a region having a specular reflectivity, and at least another one of the plurality of regions is a region having a diffuse reflectivity; and a molded product and an electronic device using the decorative film.