An optical member having a concentric diffraction surface facing the outside, wherein the projection having a inclined surface concentric to the diffraction surface having an angle of inclination smaller than the angle of inclination is provided outside the diffraction surface having the largest , so that an interference of a cutting tool is avoided, and simultaneously, deterioration of a surface roughness may be restrained.

There is provided a diffraction optical element which comprises a base material, and in which a first resin layer having a diffraction grating shape and a second resin layer are laminated on the base material. The diffraction grating shape forms a plurality of concentric annular sections when planarly viewed from a lamination direction of the diffraction optical element. The second resin layer comprises a first portion and a second portion, and the first portion is provided on a first annular section of the first resin layer. The second portion is continuously provided from above the first portion to above a region including a periphery of the first resin layer. A difference between a refractive index of the second portion on a center of the first annular section and a refractive index of the second portion on a circumference of the first annular section is within 0.0005.

Methods of fabricating optical lenses and mirrors, systems and composite structures based on diffractive waveplates, and fields of application of said lenses and mirrors that include imaging systems, astronomy, displays, polarizers, optical communication and other areas of laser and photonics technology. Diffractive lenses and mirrors of shorter focal length and larger size, with more closely spaced grating lines, and with more exacting tolerances on the optical characteristics, can be fabricated than could be fabricated by previous methods.

Aimed at providing a method for molding a thermoplastic resin product and a molding apparatus therefor that enable productivity, transfer quality or the like to be improved. Provided is a method for molding a thermoplastic resin product that includes a heating step, a transfer step, a cooling step and a mold-releasing step, and wherein, in the heating step, a stamper is irradiated with infrared rays in a state where a cooling member is not irradiated with infrared rays, and at least in the final stage of the transfer step, the stamper and the cooling member are brought into contact.

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.

Aimed at providing a method for molding a thermoplastic resin product and a molding apparatus therefor that enable productivity, transfer quality or the like to be improved. Provided is a method for molding a thermoplastic resin product that includes a heating step, a transfer step, a cooling step and a mold-releasing step, and wherein, in the heating step, a stamper is irradiated with infrared rays in a state where a cooling member is not irradiated with infrared rays, and at least in the final stage of the transfer step, the stamper and the cooling member are brought into contact.

Provided is a Fresnel lens including a lens body, a planar surface on one side of the lens body, and a Fresnel surface located on another side of the lens body opposite to the planar surface, wherein the Fresnel surface includes alternating effective portions and non-effective portions, and the non-effective portions have non-smooth microstructures.

The present invention describes the use of embossed patterns for producing striking visual patterns and/or security features on the package surface such as holographic images, 3-dimensional patterns, optical patterns, Fresnel lenses, sterling lenses or any similar optical features in registered or unregistered manner on a specified portion on a web, sheet or package. The present invention eliminates intermediate products and processes such as manufacturing and using stamping foils avoiding wastage of carrier films. This result in high speed operation with accurate registration for packaging substrate in web roll form or in sheet form.

Provided are an internal check mirror for an overhead bin that makes it possible to increase the size of a mirror image while having substantially equivalent weight to a conventional one and improve visibility, and a method for manufacturing the same. An internal check mirror 1 for an overhead bin comprising a Fresnel mirror 2 having a convex mirror function is configured by arranging a plurality of minute circular grooves 4 having V-shaped cross-sections concentrically on the back surface side of a substrate 3 formed from a transparent resin, covering the surface of these minute grooves 4 with a reflective film 5, and covering the reflective film 5 with a protective layer 6. The thickness of the Fresnel mirror 2 is 0.1-1.0 mm, and the radius of curvature of a virtual arc based on the inclined surfaces 4a of the plurality of minute grooves 4 is 200-1000 mm.

An electronic device comprises a cover and an outer casing. The cover includes a first light transmitting substrate layer and a first pattern layer. The first pattern layer is attached to bottom of the first light transmitting substrate layer and includes a plurality of first microstructure patterns. The outer casing is mounted on the cover. The outer casing includes a second light transmitting protection layer and a second pattern layer. The second light transmitting protection layer includes a first surface facing the cover. The second pattern layer is configured at the first surface of the second light transmitting protection layer. The second pattern layer includes a plurality of second microstructure patterns. The first pattern layer and the second pattern layer are superimposed to form a virtual pattern image.