Aa method for manufacturing a set of semi-finished lenses and a lens from a semi-finished lens of the set and a set of semi-finished lenses each intended to be used in the manufacturing of a finished lens of determined target power, each semi-finished lens having a base curve chosen among a number N of base curves, wherein each base curve is associated to a respective range of powers of finished ophthalmic lenses to be manufactured, and each semi-finished lens of the set comprises a recorded holographic component, wherein the holographic components of the set exhibit a limited number of configurations, and each holographic component configuration is associated exclusively to one base curve among the N base curves.

The disclosure relates to a process for manufacturing an optical article, including: providing an optical article manufactured by additive manufacturing, the optical article having a first main surface and a second main surface; providing at least one added value film including at least one added value layer; and attaching the at least one added value layer onto at least one of the two main surfaces of the optical article by laminating the at least one added value film onto the at least one main surface.

The present invention provides an automatic casting device for a lens monomer and a process thereof. When the lens monomer within a mold cavity reaches a liquid level monitoring point P, the cavity is exactly 50% filled with the lens monomer. The remaining of the casting process will be precisely controlled based on the obtained data from the past process to ensure an exact 100% monomer filling into the cavity.

A method of producing a spectacle lens includes providing a substrate having a front surface and a back surface and coating or covering at least one of the front surface or the back surface of the substrate, in full or in part, with a layer. The surface topography of the substrate surface is changed by bringing the surface into contact with a medium and the medium is removed. A product made according to the method and including (i) a spectacle lens or (ii) a representation of the spectacle lens in the form of computer-readable data present on a data medium or (iii) a data medium including a virtual representation of the spectacle lens in the form of computer-readable data or (iv) a representation of the spectacle lens in the form of a computer-readable data signal, is also disclosed.

Systems and methods according to one or more embodiments are provided for annealing a chalcogenide lens at an elevated temperature to accelerate release of internal stress within the chalcogenide lens caused during a molding process that formed the chalcogenide lens. In particular, the annealing process includes gradually heating the chalcogenide lens to a dwell temperature, maintaining the chalcogenide lens at the dwell temperature for a predetermined period of time, and gradually cooling the chalcogenide lens from the dwell temperature. The annealing process stabilizes the shape, the effective focal length, and/or the modulation transfer function of the chalcogenide lens. Associated optical assemblies and infrared imaging devices are also described.

A manufacturing method of a plastic lens formed by using a metal mold having a fixed mold and a movable mold. The plastic lens comprises a flange part surrounding a lens face, and an image side face of the flange part comprises a black coating part and an outer peripheral part. The manufacturing method may include a molding process in which the plastic lens is molded by using the fixed mold for molding an object side lens face and the movable mold for molding an image side lens face and the flange part, a mold opening process in which the metal mold is opened by moving the movable mold, and a pushing-out process in which the outer peripheral part is pushed out by an ejector pin disposed in the movable mold when the mold opening process is performed or, after the mold opening process has been performed.

Techniques are disclosed to enable manufacture of open-air corner-cube retroreflectors having a corner-cube cavity. The techniques involve additively forming a substrate by way of additive manufacturing technologies such as three-dimensional printing technologies. The techniques further involve optionally machining the additively formed surface of the substrate and replicating a reflective surface in the corner-cube cavity using a master that is coated with a reflective material. An adhesive is applied to the corner-cube cavity so that when the adhesive cures and the master is withdrawn from the corner-cube cavity, the reflective surface adheres to the adhesive and remains an integral part of the retroreflector.

Disclosed is an improved diffraction structure for 3D display systems. The improved diffraction structure includes an intermediate layer that resides between a waveguide substrate and a top grating surface. The top grating surface comprises a first material that corresponds to a first refractive index value, the underlayer comprises a second material that corresponds to a second refractive index value, and the substrate comprises a third material that corresponds to a third refractive index value. According to additional embodiments, improved approaches are provided to implement deposition of imprint materials onto a substrate, which allow for very precise distribution and deposition of different imprint patterns onto any number of substrate surfaces.

Method for printing a multifocal lens (1) with a sharp transition region, comprising a base lens (2) and at least one segment lens (3) comprising the following steps:—virtually slicing the three-dimensional shape of the multifocal lens (1) into two-dimensional slices (9), resulting in a number Nbase of slices ji, . . . , jNbase of the base lens (2) and a number Nsegment of slices i1 . . . , iNSegment of the at least one segment lens (3),—providing a number Nfinish of layers printed as surface-finishing layers (4),—printing the base lens (2) in a base-lens printing step and consecutively printing the segment lens (3) in a segment-lens printing step on top of the base lens (2) through a targeted placement of droplets of printing ink at least partially side by side, wherein in the base-lens printing step first Nbase-Nfinish structure layers (5) and then Nfinish surface-finishing layers (6) are printed and in the segment-lens printing step first NsegmentNfinish structure layers (7) and then Nfinish surface-finishing layers (8) are printed.

A method for manufacturing an optical element according to a prescription is provided, including providing a combination of a block piece and a lens blank having a first face and a second face opposite to the first face, the lens blank being blocked with the first face on the block piece, surfacing and polishing the second face of the lens blank, cleaning the lens blank, hard coating the second face of the lens blank, degassing the lens blank, applying an AR-coating in a vacuum box coater, and deblocking the processed lens blank from the block piece, wherein the cleaning step includes a pre-cleaning step including a finishing drying step allowing the lens blank to be put on hold, and a deep cleaning step prior to the hard coating step.