The present disclosure provides a composition comprising a hierarchical opal that exhibits structural color when exposed to incident electromagnetic radiation. The hierarchical opal comprises nanoscale periodic cavities separated by a lattice constant, and includes a surface having grooves. The grooves may form a diffractive optical element on the surface of the hierarchical opal, such as a diffuser, a diffraction grating, a beamsplitter, a beam displacement opic, a Fresnel lens, and a micro lens, among others.

An imaging directional backlight apparatus including a waveguide, a light source array, for providing large area directed illumination from localized light sources. The waveguide may include a stepped structure, in which the steps may further include extraction features optically hidden to guided light, propagating in a first forward direction. Returning light propagating in a second backward direction may be refracted, diffracted, or reflected by the features to provide discrete illumination beams exiting from the top surface of the waveguide. Viewing windows are formed through imaging individual light sources and hence defines the relative positions of system elements and ray paths. Lateral non-uniformities of output image are improved by means of adjustment of input aperture shape and reflective aperture shape. Cross talk in autostereoscopic and privacy displays may further be improved by light blocking layers arranged on the input end of the waveguide.

An exemplary lamp assembly includes a lens, a base, and a textured surface between an outwardly facing surface of the lens and an outwardly facing surface of the base. An exemplary lamp molding method includes injecting a first material into a mold cavity to form a lens, and injecting a second material against a textured surface of the lens within the mold cavity to form a base.

The present disclosure discloses an optical film, a mold and an electronic device cover plate, wherein the optical film comprises: a carrier; a patterned layer located on a surface of the carrier, the patterned layer comprising continuously disposed micro-nano structures, which are convex structures and/or concave structures; wherein the optical film visually has a stereoscopic impression not less than 1 mm in depth or height. The optical film provided by the present disclosure is disposed with a patterned layer comprising continuously disposed micro-nano structures, so that the stereoscopic effect can be achieved only by adopting the one-layer structure, and there is a visual difference of at least 1 mm in depth or height, thereby reducing the thickness and the manufacturing process of the film, and well decreasing the cost.

Provided is a curable composition capable of giving a lens that has excellent transfer accuracy from a mold and offers heat resistance and optical properties at excellent levels. The curable composition according to the present invention for lens formation contains a cycloaliphatic epoxide (A) represented by Formula (a), a cationic-polymerization initiator (B), and a polysiloxane (C) represented by Formula (c). The curable composition contains the polysiloxane (C) in an amount of 0.01% to 5% by weight based on the total amount of the curable composition. The curable composition according to the present invention for lens formation may further contain a siloxane compound (D) containing two or more epoxy groups per molecule. ##STR00001##

An imaging directional backlight apparatus including a waveguide, a light source array, for providing large area directed illumination from localized light sources. The waveguide may include a stepped structure, in which the steps may further include extraction features optically hidden to guided light, propagating in a first forward direction. Returning light propagating in a second backward direction may be refracted, diffracted, or reflected by the features to provide discrete illumination beams exiting from the top surface of the waveguide. In operation, luminance streaks and bright illumination regions may be formed due to undesirable imaging characteristics from the structure of the Fresnel mirror. Fresnel mirror draft facets and reflective facet microstructures are provided that achieve reduction of visibility of light streaks and bright illumination regions.

A method for making a hybrid lens includes providing, in a mold having a first Fresnel pattern, (i) a first lens and (ii) a silicone material comprising silicone and curing the silicone material in the mold to form a hybrid Fresnel lens. The cured silicone material is mechanically coupled with the first lens; and the cured silicone material has a second Fresnel pattern that corresponds to the first Fresnel pattern. A hybrid lens made by this method is also described. A hybrid lens includes a first lens mechanically coupled with a cured silicone material. The cured silicone material has a Fresnel pattern on a surface that faces away from the first lens.

A lens includes a cover part and a light-shielding part. The cover part includes a lens part, a connection part extending downward from lateral sides of the lens part, and one or more flange parts each extending outward from a lower-end portion of the connection part. The lens part and the connection part define a recess having an opening facing downward. The flange parts extend outward from a periphery of the opening of the recess. The lens part, the flange parts, and the connection part are formed of a thermosetting first resin and continuous to one another. The light-shielding part covers outer lateral surface of the connection part and is formed of a thermosetting second resin having a greater light-absorptance or a greater light-reflectance than the thermosetting first resin. The flange parts have a greater thickness than the connection part.

A lens includes a cover part and a light-shielding part. The cover part includes a lens part, a connection part, and a plurality of flange parts, formed with a thermosetting first resin and continuous to one another. The light-shielding part covers lateral end surfaces and an upper surface of each of the flange parts and outer lateral sides of the connection part and formed with a thermosetting second resin having a greater light-absorptance or a greater light-reflectance than the thermosetting first resin.

A lens includes a cover part and a light-shielding part. The cover part includes a lens part, a connection part, and a flange part which are formed of a thermosetting first resin and continuous to one another. The light-shielding part covers an outer lateral side of the connection part and is formed of a second resin having a greater light-absorptance or a greater light-reflectance than the first resin.