The present invention relates to a molding die comprising a base portion and a pattern portion having recesses and protrusions provided on a surface of the base portion, wherein a distance between the centers of protruding portions of the pattern portion is 15 to 50 nm, a ratio of recessed and protruding portion (protrusion/distance between centers of the protruding portions) of the pattern portion is 0.5 or less, a height of the protruding portion of the pattern portion is 2 nm or more, and a defect density of the pattern portion is 10×10.sup.10 cm.sup.2 or less. The present invention also relates to a lens comprising a base portion and a pattern portion having recesses and protrusions provided on a surface of the base portion, wherein a distance between centers of protruding portions of the pattern portion is 15 to 50 nm.

A method of making a shaped abrasion-resistant multilayer optical film includes providing a curable composition comprising, based on the total weight of components a) to d) components: a) 87 to 96 weight percent of urethane (meth)acrylate compound having an average (meth)acrylate functionality of 2 to 4.8; b) 2 to 12.5 weight percent of (meth)acrylate monomer having a (meth)acrylate functionality of 1 to 2, wherein the (meth)acrylate monomer does not comprise a urethane (meth)acrylate compound; optionally c) 0.5 to 2 weight percent of silicone (meth)acrylate; and d) optional effective amount of photoinitiator. The curable composition is coated onto an MOF. Optionally, the curable composition to is at least partially dried. Next, the curable composition or the at least partially dried curable composition is at least partially cured to provide an abrasion-resistant multilayer optical film. Lastly, the abrasion-resistant multilayer optical film is thermoformed using a female mold having a mold surface. At least a portion of the mold surface has a radius of curvature of 58 to 76 mm and a maximum depth of 13 to 20 mm.

The present invention provides a thin sheet with suppressed strain. The sheet according to the present invention has a thickness from 0.1 to 5 mm and is formed of a plastic that contains at least one resin selected from polyamide resins, polycarbonate resins, cellulose acrylate resins, and acrylic resins. A difference between a maximum value and a minimum value of retardation of the sheet is 3000 nm or less. The sheet according to the present invention can be obtained, for example, by subjecting a plastic containing at least one resin selected from polyamide resins, polycarbonate resins, cellulose acylate resins, and acrylic resins to extrusion molding to obtain a plastic in the form of a sheet, and subjecting the resulting plastic in the form of a sheet to vacuum forming, air-pressure forming, or vacuum air-pressure forming.

A machine for disassembling a lens mold assembly including a first mold part, a second mold part, and a molded-lens sandwiched therebetween. The machine includes a centering unit to center the lens mold assembly. The machine includes a disassembling module having a mold engagement mechanism to engage the first and second mold parts to clamp and move the lens mold assembly. The disassembling module includes a molded-lens holder mechanism having at least two clamping members to clamp the molded-lens of the lens mold assembly. The machine includes an alignment guidance module to detect relative positions between the molded lens of the lens mold assembly and the molded-lens holder mechanism to align the molded lens for clamping by the molded-lens holder mechanism. The mold engagement mechanism is configured to hold the first and second mold parts individually and to separate the first and second mold parts from the molded lens.

The disclosure relates to a method for producing an optical element having at least one optically effective surface. The optically effective surface comprises a contour and a surface structure superimposed on the contour. Transparent liquid plastic is injection-molded by means of a (smooth) injection mold of an injection molding machine (500) in dependence on a group of injection molding parameters to form an injection molded component (21) having the contour of the optically effective surface but without the surface structure superimposed on the contour, wherein at least one parameter of the group of injection molding parameters is set and/or corrected in dependence on properties of the injection molded component (21), and wherein the optical element is produced using the group of injection molding parameters.

In a method for the manufacture of a transmissive optical system from a blank, material ablation is achieved on the blank with an ablative laser, and the pulse duration of the ablative laser is less than 1 ns, and preferably lies between 3 fs and 100 fs, or between 100 fs and 10 ps.

A method for manufacturing an ophthalmic lens using an additive manufacturing technology, the ophthalmic lens having at least one useful optical surface and a peripheral region surrounding at least in part the useful optical surface, includes the steps of: providing a support; manufacturing a part of the ophthalmic lens including a portion of the peripheral region, and being in contact with the support by the portion of the peripheral region so that the support bears the part of the ophthalmic lens being manufactured while the useful optical surface is free from any contact with the support. A support designed to bear an ophthalmic lens and a manufacturing system are also described.

An optical printing positioning system is set forth. The system includes a cavity for retaining an optical surface having an inner surface dimensioned and configured to maintain and to constrain an optical surface disposed therein when the optical surface undergoes a printing process.

The present invention relates to a method for producing a molded body (10), comprising the following steps: a) providing a molding tool (40) which has at least one receptacle (12) in which at least one material (30) which comprises at least one shape-memory material (31) is introduced, wherein the shape-memory material (31) is present in a first state (111), wherein the material (30) at least partially fills the receptacle (12) of the molding tool (40) in such a manner that said material adjoins at least one surface of the receptacle (12); b) creating a molded body (10) in the receptacle (12) of the molding tool (40) from the material (30), wherein the shape-memory material (31) is present in a second state (112), wherein a form (11) is embossed into the molded body (10) during the second state (112); c) transferring the shape-memory material (31) to a third state (113), wherein the molded body (10) can be deformed during the third state (113) in such a manner that the molded body (10) is demolded from the receptacle (12) of the molding tool (40); and d) at least partially restoring the form (11) of the molded body (10) by transferring the shape-memory material (31) to a fourth state (114), wherein the molded body (10) at least partially resumes the form (11) according to step b) during the fourth state (114).

The present disclosure includes systems, devices, and methods for preventing contamination during formation of an optical article. In some implementations, a device for preventing contamination of a mold cavity during injection molding of a function wafer includes a containment band having an annular base that defines a first opening configured to receive a functional wafer. The device also includes one or more sidewalls that project a first direction from and surround at least a portion of the first opening. The one or more sidewalls may be configured such that, during formation of an optical article, a first portion of the functional wafer is in contact with the one or more sidewalls.