Glass comprising a colored layer, wherein the glass contains one or more glass components selected from the group consisting of Sb ions, As ions, Sn ions, and Ce ions in an amount of 0.075 cation % or more.

Compound eyes of insects are great optical system for imaging and sensing by the nature creator, which is an unsurpassed challenge due to its precision and small size. Here, we use meta-lens consisting of GaN nano-antenna to open the fascinating doorway to full-color achromatic light field imaging and sensing. A 60×60 multi-channels meta-lens array is used for effectively capturing multi-dimensional optical information including image and depth. Based on this, the multi-dimensional light field imaging and sensing of a moving object is capable to be experimentally implemented. Our system presents a diffraction-limit resolution of 1.95 micrometer via observing the standard resolution test chart under white light illumination. This is the first mimic optical light field imaging and sensing system of insect compound eye, which has potential applications in micro robotic vision, non-men vehicle sensing, virtual and augmented reality, etc.

A mode control system and method for controlling an output mode of a broadband radiation source including a photonic crystal fiber (PCF). The mode control system includes at least one detection unit configured to measure one or more parameters of radiation emitted from the broadband radiation source to generate measurement data, and a processing unit configured to evaluate mode purity of the radiation emitted from the broadband radiation source, from the measurement data. Based on the evaluation, the mode control system is configured to generate a control signal for optimization of one or more pump coupling conditions of the broadband radiation source. The one or more pump coupling conditions relate to the coupling of a pump laser beam with respect to a fiber core of the photonic crystal fiber.

Provided are a method for easily and quickly producing a patterned thin film having a high refractive index and a high transparency, and a highly refractive thin film produced by the method. The method comprises a first step: a step of forming, on a substrate, a coating using a sol containing a metal oxide modified with a phosphorus compound represented by the following formula (1): ##STR00001##
(wherein R.sup.1 is a hydrogen atom, an alkyl group, an alkynyl group, an alkenyl group, an aryl group, an aliphatic heterocyclic group, or an aromatic heterocyclic group; R.sup.2 is a divalent organic residue; and n is 1 or 2); a second step: a step of curing the coating on the substrate obtained in the first step by light irradiation; and a third step: a step of further adding energy to the cured film obtained in the second step by heating and/or light irradiation.

Manufacturing an optical device includes providing a substrate (102) having a polymeric layer (104) on a surface of the substrate, forming openings in the polymeric layer, and depositing a material in the openings to form meta-atoms (114, 214) of a first metastructure. Adjacent ones of the meta-atoms are separated from one another by polymeric material of the polymeric layer. Optical devices that include one or more metastructures in which meta-atoms are separated from one another by polymeric material are described, as are modules that incorporate the optical devices.

A metalens and an optical system having the metalens. The metalens includes: a substrate capable of transmitting light in different wavelength bands; and a plurality of unit cells on the same surface of the substrate. The multiple unit cells are arranged in an array, the unit cells are regular hexagons and/or squares. A center position of each unit cell or each of the center position and vertex positions of each unit cell is provided with a nanostructure. The nanostructures are symmetrically arranged with respect to a first axis and a second axis respectively, and partial nanostructures obtained by dividing the nanostructures on the metalens along the first axis and the second axis are identical to each other. The first axis is perpendicular to the second axis, and both the first axis and the second axis are perpendicular to a height direction of the nanostructures.

A method for preparing a stack of dielectric layer on a substrate. A substrate is provided and a first layer of liquid is printed onto a surface of the substrate. A first dielectric layer is formed by solidifying the first layer of liquid and a second layer of liquid is printed onto the first dielectric layer. A second dielectric layer is formed by solidifying the second layer of liquid. The liquid includes dielectric constituents and the liquid is printed such that droplets having a volume of less than one hundred nanoliters are locally deposited per square millimeter on the surface of the substrate.

A light diffuser includes a main body and first fillers. The first fillers are dispersed in the main body. The first fillers include at least one of ZrO.sub.2, Nb.sub.2O.sub.5, Ta.sub.2O.sub.5, Si.sub.xN.sub.y, Si, Ge GaP, InP, and PbS, and a diameter of each of the first fillers is in a range from 0.1 μm to 1 μm.

A projector of the present disclosure includes a light source that emits laser light, a metasurface element that modulates the phase of the laser light emitted from the light source, and a light modulation element that modulates the phase-modulated laser light emitted from the metasurface element to generate projection light.

A lens is provided. The lens includes a lens unit, and a serrated layer disposed on at least a portion of a surface of the lens unit, wherein the serrated layer includes a plurality of particles dispersed therein that are injected into the serrated layer. The serrated layer includes a plurality of conical structures having different sizes, accordingly, a refractive index on the surface of the serrated layer may gradually change.