A headset for virtual reality applications includes an optical element configured to modify light from an electronic display in the headset and to direct the modified light to a user. The optical element may include a Fresnel lens secured to a lens by securing the Fresnel lens to a mold and inserting a casting material into the mold so the casting material forms the lens and a portion of the casting material exists on and past an edge of the Fresnel lens. This encases the edge of the Fresnel lens in the casting material, securing the Fresnel lens to the lens.

The present invention provides processes (100, 200, 300, 400) for making a flexible packaging substrate having one or more Fresnel lenses (410, 602) and a product made therefrom. The said process comprises providing one or more Fresnel lenses (410, 602) on a first surface (408a, 610a) of a substrate/film (408, 610); and overlapping a predetermined portion (411, 603) of the Fresnel lenses (410, 602) on the substrate/film (408, 610) by printing or foil stamping. The flexible packaging substrate having one or more Fresnel lenses comprises a substrate (408) having the Fresnel lens or the pattern of Fresnel lenses (410) on the first surface (408a) thereof, wherein a predetermined portion (411) of the Fresnel lenses (410) is covered to hide irregular/uneven/torn edges.

A lens component of an optical rain sensor (10) has an emitter lens (16) configured as a Fresnel lens and a receiver lens (18) configured as a Fresnel lens, each of which, in a top view, has a rectangular contour with first edges and second edges extending at right angles thereto, the center (M.sub.S) of the emitter lens (16) and/or the center (M.sub.E) of the receiver lens (18) being arranged off-center with respect to the side length of at least one of the edges, and the emitter lens (16) and the receiver lens (18) being arranged side by side. The lens component (12) is manufactured in a negative molding process in which first and second mold inserts are arranged side by side, each of which having a Fresnel lens mold, the first and second mold inserts each being selectively arranged in a manner rotated through 0 or through 180, and the mold inserts arranged in this way forming a negative mold for the emitter lens (16) and the receiver lens (18) of the lens component (12) during the negative molding process. This provides a modular system for manufacturing optical rain sensors (10), having lens components (12) in a plurality of different configurations which differ from each other in regard to the distance of the centers (M.sub.S, M.sub.E) of the emitter lens (16) and the receiver lens (18). For manufacturing the lens component (12), the mold inserts are arranged side by side, each in a manner selectively rotated through 0 or through 180, and are negative-molded using a suitable plastic material. This is performed in a tool for manufacturing a lens component (12), which includes a mount into which the mold inserts can be placed next to each other along the second edge, the first and/or the second mold insert each being adapted to be inserted into the mount in a manner rotated through 0 or through 180.

A diffractive optical element is provided that includes a first resin layer having steps on one surface, a second resin layer integrated with the first resin layer in tight contact, and a high refractive index layer disposed between a wall surface of the first resin layer and a wall surface of the second resin layer, wherein the high refractive index layer has a refractive index higher than those of the first resin layer and of the second resin layer, and the high refractive index layer is formed continuously to extend beyond the boundary between the wall surface and the inclined surface adjacent thereto, and to partly overlap the inclined surface.

A lens assembly and a method of making the assembly are described. The lens assembly includes a first lens and a second lens slidably coupled with the first lens. The second lens includes a silicone material and has a Fresnel pattern surface. Also described is a display device including the lens assembly and an array of light emitting devices coupled with the lens assembly for outputting light through the lens assembly.

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.

Provided is a curable composition which has chargeability into silicone molds and curability at excellent levels, less causes the silicone molds to swell, and allows the silicone molds to have better durability and a longer service life in repeated use. The curable composition according to the present invention contains curable compounds and a cationic initiator and is used for production of an optical component by molding using silicone molds. The curable compounds include (A) a cycloaliphatic epoxy compound in a content of 10 weight percent or more of the totality of all the curable compounds contained in the curable composition. Of the totality of all the curable compounds contained in the curable composition, 10 to 50 weight percent is a curable compound or compounds having a molecular weight of 400 or more.

Silicone-containing light fixture optics. A method for manufacturing an optical component may include mixing two precursors of silicone, opening a first gate of an optic forming device, moving the silicone mixture from the extrusion machine into the optic forming device, cooling the silicone mixture as it enters the optic forming device, filling a mold within the optic forming device with the silicone mixture, closing the first gate, and heating the silicone mixture in the mold to at least partially cure the silicone. Alternatively, a method for manufacturing an optical component may include depositing a layer of heat cured silicone optical material to an optical structure, arranging one or more at least partially cured silicone optics on the layer of heat cured silicone optical material, and heating the heat cured silicone optical material to permanently adhere the one or more at least partially cured silicone optics to the optical structure.

Provided is a fine and highly heat-resistant optical component having a coating layer on part thereof. The optical component according to the present invention includes a cured product of a curable composition of an epoxy compound (A); and at least one coating layer having a thickness of 0.1 mm or less on part of the cured product. The optical component has a maximum thickness of 2 mm or less and a maximum width in a plan view of 10 mm or less. This optical component is produced through the steps 1, 2, and 3 as follows. In the step 1, the curable composition is charged into a mold having two or more optical-component concave patterns, and at least one of light and heat is applied to give a cured product having two or more optical-component forms. In the step 2, the cured product is separated to give separated articles. In the step 3, a coating layer or layers is formed on the separated articles.

A display body includes a partially-provided optical element array, the display body enabling an optic effect by optical elements to be observed, wherein an image for producing the optic effect through interaction with the optical element array is formed in a first partial region on a first surface of a main body, the optical element array is formed in a second partial region corresponding to the first partial region on a second surface opposite to the first surface, the optical element array has recess portions and projecting portions, and a non-formation surface of the second surface where the optical element array is not formed is positioned between a lowest part of the recess portions and a highest part of the projecting portions.