58 results about "Entocentric lens" patented technology

A light funnel collimator has a central lens surface and a back reflecting surface, shaped to provide a wider back-ground beam and a narrower hotspot beam within but off-center of the wider beam. One of the beams is on-axis of the collimator, and the other beam is off-axis. The reflector is at least partly asymmetrical relative to the axis, and provides or contributes to the off-axis beam.

Each intralayer lens disposed between a color filter 120 and photoelectric conversion sections has a Fresnel lens structure composed of a center lens 132 and an annular lens 134. As a result, the thickness of the intralayer lenses is reduced, and positions of upper lenses can be lowered without having to reduce the thickness of a color filter.

Lens mold assembly including a first and a second mold cooperating with each other to define a mold cavity for molding an ophthalmic lens with the first and second molds being held in line contact with each other at a radial position, wherein at least one of the two molds consists of a central molding portion located radially inwardly of the radial position, and an outer rim portion located radially outwardly of the radial position, the central molding portion cooperating with the other mold to define the mold cavity, the above-indicated at least one mold having a mold surface which is opposed to a mold surface of the other mold when the two molds are assembled together, the mold surface of the at least one mold consisting of a central lens-forming region in the central molding portion, and an outer peripheral non lens-forming region in the outer rim portion, at least a part of the lens-forming region adjacent to the radial position providing a concave portion, while at least a part of the outer peripheral non lens-forming region adjacent to the radial position providing a convex portion.

The present invention relates to a light collector for collecting light emitted by a light source and converting the collected light into a light beam. The light collector comprises a central lens part aligned along an optical axis of the light source where the central lens comprises a central entrance surface and a central exit surface. The light collector also has a peripheral lens part surrounding at least of part of the central lens. The peripheral lens comprises a peripheral entrance surface, a peripheral reflection surface and a peripheral exit surface. The central lens further comprises an extension part positioned between the central entry surface and the central exit surface and protrudes from the peripheral exit surface and elevates the central exit surface a distance above the peripheral exit surface.

A center lens for collecting light in a center range and left/right lenses for collecting light in left/right ranges are supported in one plane to form center and left/right unit images. A microprocessor combines the unit images into a wide-angle image. The left/right optical lenses are placed on left-right direction line parallel to the wide-angle direction, while the center lens is placed distant from the left/right lenses above the direction line. Prisms are placed in front of the left/right lenses, and a toroidal lens to vertically modify the light path for light convergence onto each lens is placed in front of the prisms. The toroidal lens has a vertically curved surface having an axis coinciding with the direction line, and a horizontally cured surface having an axis coinciding with a vertical line passing through the center lens. This device can obtain a wide-angle image with a vertically large picture angle.

A CMOS image sensor and fabricating method thereof enhances a light-receiving capability of an image sensor by preventing poor light-refraction characteristics at the peripheral part of a microlens. The CMOS image sensor includes at least one microlens formed by anistropic etching to have a focusing centerline, a central lens portion, and a peripheral lens portion, wherein the focusing centerline passes through the central lens portion and wherein the peripheral lens portion surrounds the central lens portion. The central lens portion has a first convex curvature based on a first radius and the peripheral lens portion has second convex curvature based on a second radius, wherein the second radius is greater than the first radius.

A panoramic imaging device comprises: a lens array having a center lens for receiving light entering in a front range of at most 60° in a capture angle and left and right side lenses formed on the same plane as that with the center lens formed thereon and having optical axes parallel to that of the center lens for receiving lights entering in left and right ranges each of at most 60° in the capture angle; and prisms or mirrors placed on light entrance side of the lens array for guiding and reflecting lights entering in the left and right ranges, such that each light entering each side lens is directed along the optical axis of each side lens. Images formed by the center lens and the left and right side lenses are combined into a panoramic image with a picture angle of at least 120°.

A solar energy collector includes a frustoconical reflective shell and a light converging lens. The frustoconical reflective shell includes a top opening and an opposite bottom opening. The reflective shell tapers from the top opening to the bottom opening. The reflective shell is configured for reflecting light. The light converging lens is arranged at the top opening and is fixed on the sidewall of the reflective shell. The light concentration lens includes a central lens portion and a periphery lens portion. The central lens portion includes a first light incident portion facing away from the bottom opening. The central lens portion includes a plurality of concentric annular prisms cooperatively forming a Fresnel-lens structure. The periphery lens portion is arranged surrounding the central lens portion. The periphery lens portion includes a convex second lens portion.

An inspection system including a catadioptric objective that facilitates dark-field inspection is provided. The objective includes an outer element furthest from the specimen having an outer element partial reflective surface oriented toward the specimen, an inner element nearest the specimen having a center lens comprising an inner element partial reflective surface oriented away from the specimen, and a central element positioned between the outer lens and the inner lens. At least one of the outer element, inner element, and central element has an aspheric surface. The inner element is spatially configured to facilitate dark-field inspection of the specimen.

A multi-view auto-stereoscopic display is provided. The display includes an angle-magnifying screen for magnifying the view angle of an image light beam from a projection head. The angle-magnifying screen includes a first lens unit, a central lens unit, and a second lens unit arranged sequentially. The first lens unit is configured for receiving the image light beam. The central lens unit is configured for redirecting the image light beam from the first lens unit to the second lens unit. The second lens unit is configured for magnifying the view angle of the image light beam.

A head-mounted display includes an optical component. The optical component includes a plurality of micro lenses and a central lens. The micro lenses are connected to each other. The central lens is connected among and surrounded by the micro lenses. The central lens and the micro lenses are substantially arranged along a plane.

The present invention provides a method and apparatus for automatically and continuously conducting the layout analysis, the blocking (attachment) of an uncut lens to a lens holder, and the process of grinding an edge of three types of lenses, such as a single-vision lens, a progressing multifocal lens and a multifocal lens, utilizing a calculated approximation of the optical center of the uncut lens and by determining the position to which a lens holder should attach to the uncut lens.