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.

A mold includes: a first molding surface configured to form a lens surface of a scanning lens being elongated in a main-scanning direction; and a first coolant passage, which is disposed within the mold and through which a coolant to control the temperature of the first molding surface flows, wherein the first coolant passage includes: a first passage portion corresponding to a first lens portion which is a portion protruding most in an optical axis direction in the lens surface; and a second passage portion corresponding to a second lens portion which is a portion retreated most in the optical axis direction in the lens surface, and the second passage portion is located to be closer to the second lens portion than a virtual plane, which passes through the first passage portion and is orthogonal to the optical axis direction.

An optical lens molding device includes a raw material supplying unit for providing a solid-state optical material, a feeding unit for transporting the solid-state optical material along a feeding direction, a heating unit including a heating body and a heating conduit in spatial communication with the supplying unit for entering of the solid-state optical material, and a molding unit. The heating conduit has a downstream part extending in the heating body to heat and melt the solid-state optical material in the heating conduit into a fluid-state optical material. The molding unit defines a cavity and a sprue in communication between the cavity and the downstream part to permit the molten fluid-state optical material to be pressed by the solid-state optical material and to flow in and fill the cavity through the sprue.

A method for manufacturing an optical lens includes pressing a fluid-state optical material by using a solid-state optical material to inject the fluid-state optical material molten from the solid-state optical material into a cavity. The solid-state optical material is molten only at the part adjacent to the cavity to form the fluid-state optical material, which facilitates transport of the optical material and minimizes residual waste. The pressing force applied to the solid-state optical material can be controlled to hence control the moving rate of the solid-state optical material, thereby precisely controlling the injection volume and injection rate of the fluid-state optical material.

An optical lens device for a head-mounted display includes a transparent support substrate and a Fresnel lens disposed thereon. The Fresnel lens includes a central lens element and a plurality of prismatic elements arranged relative to the central lens element in a proximal-to-distal manner. Each of the prismatic elements has a base facing toward the support substrate, and a draft facet and a sloped facet extending from the base away from the support substrate to intersect with each other to form an apex. Each of the prismatic elements has a height measured from the base to the apex and not greater than 75 μm. The base has a width not greater than 250 μm. A method and a mold for producing the optical lens device are also disclosed.

A light flux controlling member includes: a vortex surface having a continuous or stepwise spiral shape; and a plurality of ridges radially disposed around a center of a spiral in the vortex surface. The height of the plurality of ridges decreases toward the center.

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.

A near-eye display (NED), comprising a frame comprising an outer lens, a micro-display panel coupled to the frame and comprising a processor configured to process content for display to a user wearing the NED, an augmented reality (AR) lens comprising a main prism lens, wherein the outer lens comprises at least one of a display corrector lens or a see-through corrector lens.

A lithography-free, mold-free method of fabricating high quality optical material by curing polydimethylsiloxane (PDMS) droplets in or on pre-heated substrates allows lenses with different focal lengths to be made by varying the volume and surface temperature, as well as the substrate.

An information processing apparatus includes a presentation processing unit. The presentation processing unit executes, when a specific sound is generated at another point other than one of a plurality of points, presentation processing for presentation indicating that the specific sound generated at the other point is not a sound generated at the one point. Each of the plurality of points has a telepresence apparatus constituting a telepresence system that performs bidirectional communication of images and sounds for communication between users located at the plurality of points.