A lighting unit which comprises a lens arrangement over a LED module is provided. The lens arrangement comprises a plate having at least one lens integrally formed by the plate for positioning over a substrate of the LED module, and at least one magnifying component integrally formed by the plate. The LED module substrate has an inspection region which is inspected through the magnifying component, so as to enable determination of a spacing between the lens arrangement and the substrate by viewing an image of the marker arrangement created by the at least one magnifying component at a given viewing location. A luminaire is also provided, which luminaire comprises a housing and the lighting unit mounted within the housing, wherein the lens arrangement (10) forms the light output window of the luminaire.

A thin-film optical device disclosed herein includes a metalens able to modulate the phase of incident light. The metalens includes a thin-film layer having a first index of refraction, an embedded layer within the thin-film layer, and the embedded layer having a second index of refraction greater than or equal to 1.5 and less than or equal to 3.0 times the first index of refraction. The embedded layer may fill a plurality of holes formed on the thin film layer, with the depth, width, and spacing of holes all contribute to modulating the phase of light traveling through the metalens.

An imaging device is provided. The imaging device may sense light passing through a corresponding imaging lens and a corresponding color filter in sensing elements disposed in a sensing region for each color channel, and generate sensing data based on a grouping of color intensity values sensed by the sensing elements for each sensing region based on a binning size determined based on an illuminance of light.

The present disclosure provides systems and methods for preventing or minimizing optical crosstalk in an optical circuit switch (“OCS”). The OCS may include a collimator lens assembly. The collimator lens assembly may include a lens array defined by a plurality of ports. Each port may include a lenslet and a spacer paired with each lenslet. Crosstalk may occur when light from other ports enter the target port's optical fiber. The collimator lens assembly may include an insert positioned relative to the lenslet. The insert may define an aperture that allows light from the target port to pass through. The insert may prevent a portion of light from adjacent ports from passing through the aperture. The insert may be located between the lenslet and spacer, on the curved surface of the lenslet, or on a plate located at a distance from the front of the lenslet.

An eye is illuminated with infrared illumination light from an array of infrared in-field illuminators. A wavefront image of retina-reflected infrared light is generated and an accommodative eye state value is determined based at least in part on the wavefront image.

Disclosed is an instrument including a multipath, monolithic optical component, made up of a portion of a transparent material between two opposite faces of the component. One of the two faces of the component is formed by a first refracting surface, and the other face includes several second refracting surfaces which are juxtaposed. Each optical path of the component is formed by one of the second refracting surfaces in combination with a corresponding portion of the first refracting surface. One such component is suited for being part, within the instrument, of a detection module with multiple optical paths arranged in parallel, with a matrix photodetector shared by the optical paths. Such a detection module may be compact enough in order to be integrated into a cryostat cold screen, improving cooling thereof, and may be combined with an objective in order to form an instrument with multiple optical paths.

The disclosed liquid lens array may include a plurality of independently operable array sections, each of which may include (1) a base layer, (2) an aperture plate overlapping the base layer, the aperture plate defining a plurality of apertures extending through the aperture plate between an inner surface of the aperture plate facing the base layer and an outer surface of the aperture plate, (3) a liquid reservoir disposed between the base layer and the aperture plate, and (4) a side wall at least partially surrounding the liquid reservoir, the side wall extending between the base layer and the aperture plate. At least a portion of at least one of the base layer or the side wall may be deformable in the presence of an electrostatic field to change liquid volumes extending from the liquid reservoir at least partially through the apertures defined in the aperture plate. Various other methods, systems, and devices are also disclosed.

Disclosed are an optical anti-counterfeiting element and an optical anti-counterfeiting product. The optical anti-counterfeiting element includes: a substrate, wherein the substrate includes a first surface and a second surface opposite each other; a micrographic layer formed on the second surface of the substrate, wherein the micrographic layer includes a micro-graphic-text region showing a preset graphic-text information and a background region, at least part of the micro-graphic-text region or the background region is covered with a small reflection surface, and the small reflection surface is covered with a color modulation structure; and a sampling layer formed on the first surface of the substrate, wherein the sampling layer is configured for sampling the micro-graphic-text layer and composing, with sampled graphics, the preset graphic-text information of a preset color showing a moire magnification effect. A colored anti-counterfeiting feature with a color varying effect showing a moire magnification effect can be generated without coloring.

A distance measuring camera apparatus according to an embodiment of the present invention comprises: a light-emitting unit; and a light-receiving unit including an image sensor. The light-emitting unit comprises: a light source including a light-emitting device; and a diffusion member arranged on the light source and including a plurality of micro-lenses. The diffusion member includes a first region and a second region, wherein the first region surrounds the second region and the second region is arranged such that the center thereof overlaps the light-emitting unit in an optical axis direction. In addition, the diameter of the micro-lens in the second region is smaller than the diameter of the micro-lens in the first region.

A method for manufacturing a roll mold by cutting a roll, includes generating a control waveform based on a signal corresponding to a rotary position of the roll, and making a plurality of cuts on a surface of the roll by, while the roll is rotated, reciprocating a cutting blade in a radial direction of the roll in accordance with the control waveform. Making the plurality of cuts includes at each of a plurality of predetermined locations, making a predetermined number of cuts of predetermined depth based on the control waveform. Generating the control waveform includes generating a control waveform dictating that the predetermined locations, the predetermined depths, or both are randomly selected. Generating the control waveform includes generating a control waveform dictating that, when multiple cuts are made at a predetermined location, each subsequent cut will have a smaller depth than a preceding cut.