A projection screen control method of one embodiment of the present disclosure includes irradiating a display member with first control light, and irradiating the display member with second control light, in which the irradiating the display member with the first control light and the irradiating the display member with the second control light are performed in sequence. The display member has a visible light transmittance or a visible light reflectance that varies depending on light, and contains a photochromic material, and the first control light and the second control light have different light intensities.

The photosensitive composition according to the present invention is a photosensitive composition including a semiconductor particle (A), a photopolymerizable compound (C) and a photopolymerization initiator (D), in which the photosensitive composition satisfies any one or more of the following (a) to (c): (a) the photosensitive composition further includes a stabilizer (E), and a content of the stabilizer (E) is 8% by mass or more based on the total amount of the photosensitive composition; (b) the photopolymerizable compound (C) includes a (meth)acrylate compound (C1) having a molecular weight of 180 or less; and (c) the photopolymerizable compound (C) includes a compound (C2) having a vinyl ether group and a (meth)acryloyl group in the same molecule.

Embodiments described include bus bars for electrochromic or other optical state changing devices. The bus bars are configured to color match and/or provide minimal optical contrast with their surrounding environment in the optical device. Such bus bars may be transparent bus bars.

The invention relates to an ophthalmic article (1) in particular for sunglasses, comprising: first layer (9) made of photochromic cellulose triacetate having a rear face (9.sub.R) to be oriented toward an eye (7) of a user and a front face (9.sub.F) to be oriented toward the field of vision (13) of the user, and a second layer (10) made of polyamide having a rear face (10.sub.R) to be oriented toward an eye (7) of a user and a front face (10.sub.F) to be oriented toward the field of vision (13) of the user, the first layer (9) being disposed proximate to the field of vision (13) of the user with regard to the second layer (10) being disposed proximate to the eye (7) of the user.

A photochromic curable composition comprising a radically polymerizable monomer having at least one oxetanyl group in one molecule, a photochromic compound and radically polymerizable monomers other than the above polymerizable monomer, and a photochromic cured body obtained by polymerizing the photochromic curable composition.

A photochromic curable composition comprising a radically polymerizable monomer having at least one oxetanyl group in one molecule, a photochromic compound and radically polymerizable monomers other than the above polymerizable monomer, and a photochromic cured body obtained by polymerizing the photochromic curable composition.

Systems and methods for lens creations are disclosed. The method includes initiating light transmission from a light source through a diffuser into a container holding resin and a substrate. The light transmission is performed according to an irradiation pattern wherein each point in the resin is illuminated by at least 10% of the diffuser. This causes a lens to be formed. To achieve this illumination, at least 15% of the diffuser receives light from the light source. Further, a diameter of the diffuser is greater than or equal to a diameter of the substrate. The system performing the methods includes a polymerization apparatus and may include a resin conditioning and reservoir apparatus, a metrology unit, a resin drainage apparatus and an optional postcuring apparatus.

An apparatus implementable on a firearm includes a lens, a light source, a control unit coupled to control the light source to project an image of an aim point onto the lens, and a housing structure that houses the lens, the light source, and the control unit, with a portion of the housing structure forming a shroud that surrounds the lens. The lens includes an ultraviolet (UV)-sensitive lens that darkens responsive to sensing a UV light. Alternatively, or additionally, the shroud is sensitive to the UV light and a color of the shroud darkens responsive to sensing the UV light.

An apparatus implementable on a firearm includes a lens, a light source, a control unit coupled to control the light source to project an image of an aim point onto the lens, and a housing structure that houses the lens, the light source, and the control unit, with a portion of the housing structure forming a shroud that surrounds the lens. The lens includes an ultraviolet (UV)-sensitive lens that darkens responsive to sensing a UV light. Alternatively, or additionally, the shroud is sensitive to the UV light and a color of the shroud darkens responsive to sensing the UV light.

The present invention relates to a superconductive rare-earth metal oxyhydride material and a method for producing the material. The method comprising the steps of: —first the formation on a substrate of a layer of an oxygen free rare-earth metal hydride with a predetermined thickness using a physical vapor deposition process; and —second exposing the rare-earth metal hydride layer to oxidative agent for oxidation where the oxygen reacts with the rare-earth metal hydride that results with obtaining rare-earth metal oxyhydride, the oxidation being below a predetermined limit defined by a measured transparency being less than 10%.