An optical member includes a base material having a front surface, and an antireflection film provided on the front surface of the base material and including a resin portion and a deformed fiber bound to the resin portion, wherein the antireflection film includes a protruding portion including the deformed fiber, on a surface of the resin portion that is on an opposite side of a side of the base material, wherein the front surface of the base material includes a protrusion portion, and wherein the protruding portion is provided above the protrusion portion.

An apparatus for obtaining information regarding a biological structure(s) can include, for example a light guiding arrangement which can include a fiber through which an electromagnetic radiation(s) can be propagated, where the electromagnetic radiation can be provided to or from the structure. An at least partially reflective arrangement can have multiple surfaces, where the reflecting arrangement can be situated with respect to the optical arrangement such that the surfaces thereof each can receive a(s) beam of the electromagnetic radiations instantaneously, and a receiving arrangement(s) which can be configured to receive the reflected radiation from the surfaces which include speckle patterns.

A light guide assembly for use with a retractor having a channel for slidably receiving an end portion of a light guide. The light guide assembly includes a light guide having the end portion for slidably inserting into the channel and retentor for releasably holding in position the end portion relative to the retractor.

An image sensor unit includes: a visible light cut filter that is arranged between a first light source and a first light guide and blocks light including visible light having wavelengths longer than those of ultraviolet light; a lens body that condenses light generated on a reading target by light radiated from the first light guide and light radiated from a second light guide; a line sensor that receives the light condensed by the lens body; and an ultraviolet light cut filter arranged between the lens body and the line sensor and blocks ultraviolet light.

Devices utilizing holographic 4D plenoptic capture and display technologies to generate a light field function to provide glasses-less vision correction for observers with imperfect vision, and to project an image according to the generated light field function, and methods for calibrating a four-dimensional light field for a user with an uncorrected visual acuity.

An optical fiber apparatus corresponding to an environmental condition and a lamp module with the optical fiber apparatus corresponding to the environmental condition may include an optical fiber, in which the movement of the optical fiber is guided upon a change in the length of the optical fiber by a high temperature or low temperature environmental condition such that the change in the length thereof is absorbed, preventing damage due to the change in the length of the optical fiber to improve durability.

Provided is a light extraction member which can be obtained at an adequate cost, while achieving desired light output characteristics without requiring complicated design and structure, and which is easily combined with another member, while exhibiting excellent productivity and excellent handling properties. A light extraction member according to the present embodiment includes: a light guide part which has a first main surface being on the light output side and a second main surface being on the reverse side of the first main surface; and a light output control layer which is a predetermined pattern formed on the first main surface. With respect to this light extraction member, the refractive index n1 of the light guide part and the refractive index n2 of the light output control layer satisfy relational expression n1>n2; and the refractive index n2 of the light output control layer is from 1.01 to 1.30.

A solution for optical biometric measurements is disclosed. According to an aspect, a sensor device includes a sensor head configured to face a skin of a human body. The sensor head includes: at least one optical emitter configured to emit light towards a direction of the skin; at least one photodetector configured to sense the emitted light from the direction of the skin; and an array of parallel light guide elements arranged to form a plurality of parallel light paths directing light from the at least optical emitter to the at least one photodetector. Each light guide element includes, between a first end and a second end of the light guide element, an optically transparent core and an optical barrier surrounding the core. The core together with the optical barrier focuses light along the core between the ends.

A method for manufacturing fabric that passes colonnaded light is described herein. The method includes weaving a first yarn and a second yarn to create a woven fabric and weaving a light emitting yarn through the woven fabric, wherein the light emitting yarn creates a plurality of loops of light emitting yarn on at least one side of the woven fabric. The method also includes finishing the woven fabric to create columns of light emitting yarn throughout the fabric by removing the plurality of loops.

A light guide receptacle for mounting a plurality of light guides in the interior of a housing part, with a plurality of light bulkheads, is configured to arrange the plurality of light guides, which are mechanically coupled to one another by means of a web, in each case in intermediate spaces between two light bulkheads of the plurality of light bulkheads and to optically decouple spatially adjacent light guides from one another by means of the respective light bulkhead, wherein the plurality of light bulkheads are integrated components of the housing part.