Abstract: Methods for operating a metal detector with a balanced coil system with a transmitter coil connected to a transmitter unit and a first and a second receiver coil connected to an input of a receiver unit, connected to a signal processing unit are provided. The transmitter unit includes a transmitter signal path for a transmitter signal with at least one fixed or selectable operating frequency. The transmitter signal is applied to an input of a transmitter amplifier that forwards the amplified transmitter signal directly or via a transmitter matching unit to the transmitter coil. The receiver unit includes at least one receiver signal path in which the receiver signal received from the balanced coil system is applied directly or via a receiver matching unit to a receiver amplifier, which forwards the amplified receiver signal directly or indirectly to a receiver demodulator that is provided in the receiver unit or is implemented in the signal processing unit.

Abstract: The embodiments of the Floatable Support for Metal Detection are comprised of a circular or oval support, a screen, and a pair of skids. The circular or oval support comprises a tube or cylinder formed from durable and highly puncture resistant polymeric material. The screen comprises a non-metallic, fabric, or polymeric mesh that forms apertures of ½-inch diameter arranged uniformly over the entire screen. The pair of skids are comprised of essentially an isosceles trapezoid. The skids are affixed to the bottom of the circular or oval support to provide a low friction surface to slide the Floatable Support for Metal Detection.

Abstract: The embodiment of the invention provides a ground-air TEM transverse magnetic polarization field detection method and system, and a forward modeling method and device.

Abstract: A time domain electromagnetic tensor based logging method, relating to the field of induction logging. A transmitting coil system Tx and a receiving coil system Rx are each composed of three orthogonal direction coils, and the transmitting coil system and the receiving coil system form a borehole probe; a time domain electromagnetic field is excited by means of two orthogonal transmitting coil systems Tx, and a secondary field signal is received by two orthogonal receiving coil systems Rx located above transmitting coils and having a distance D; during each measurement, three directions are used for transmitting, nine component data is received at the same time, and each component is a series of induction potentials in one-to-one correspondence with measurement time sequences, and a potential or resistance change, from near to far, of the rock stratum where a measurement point is located is obtained after time-depth conversion.

Abstract: An outer space-based debris detection system may include a network of satellites. A first satellite may be configured to propagate a first series of solitary plasma waves through an outer space detection area having a debris body therein. The debris body propagates second plasma waves therefrom. A second satellite associated with the detection area may be configured to receive the first series of solitary plasma waves from the first satellite after interaction with the second plasma waves from the debris body to thereby detect the debris body.

Abstract: Systems and methods include a computer-implemented method for predicting locations of aquifers. Missing measurements in groundwater chemistry data from aquifers are replaced with calculated equivalents. The groundwater chemistry data is split into a model building/optimizing dataset and a model validation dataset. The groundwater chemistry data is normalized. A dimensionality reduction is performed on the groundwater chemistry data, including identifying principal components. An aquifer prediction model is generated and trained using the model building/optimizing dataset and machine learning. Performance of the aquifer prediction model is validated using the model validation dataset. Locations of aquifers are predicted during production of a new well using the aquifer prediction model and groundwater chemistry data for the new well. Settings, targets, and parameters of equipment used for drilling are changed based on the predicted locations of aquafers and the groundwater chemistry of the aquifers.

Abstract: A method related to generating a facies-cement model of a subsurface region. The method includes obtaining depositional data regarding the subsurface region, wherein the depositional data incudes wave impact data. The method further includes generating, by a computer processor, a geological model for the subsurface region using a forward-depositional modeling process and the depositional data, wherein the geological model comprises wave energy data. The method further includes determining, by the computer processor, carbonate cementation data for the subsurface region using a diagenetic modeling process and the wave energy data, wherein the carbonate cementation data describes cementation in one or more depositional processes, and generating, by the computer processor, a facies-cement model of the subsurface region.

Abstract: The application discloses a method for optimizing a lithium-potassium anticline structure target area, which includes the following steps: obtaining data of a historical lithium-potassium anticline structure area, and classifying the data of the historical lithium-potassium anticline structure area to generate classified data; carrying out a parameter assignment on the classified data to obtain a parameter data set; constructing a neural network model, inputting the parameter data set into the neural network model for a training, and obtaining a target area optimal neural network model; and based on the target area optimal neural network model, carrying out a target area optimization in a deep lithium-potassium anticline structure area, and obtaining an optimal result.

Abstract: A fire apparatus system includes a fire apparatus and one or more processing circuits. The fire apparatus includes an aerial ladder and an environment sensor positioned along the aerial ladder. The environment sensor is configured to collect data regarding a weather characteristic at a location of the fire apparatus. The one or more processing circuits are configured to acquire the data collected by the environment sensor, monitor the weather characteristic at the location based on the data, and transmit a notification or a command to one or more devices based on the weather characteristic.

Abstract: A novel metasurface and method of manufacture are disclosed. The metasurface of the present disclosure is a volumetric and nonlocal metasurface that maps incident electromagnetic waves to a spot on the bottom of the metasurface. The metasurface defines a complex of structural optical properties to manipulate the electromagnetic wave nonlocally. The metasurface is composed of 2 more materials each having a different refractive index.

Abstract: Methods of manufacturing an optical device can include, in some implementations, providing a substrate having a first polymeric layer on a surface of the substrate and a second polymeric layer on the first polymeric layer, forming first openings in the second polymeric layer to define an etch mask composed of material of the second polymeric layer, and etching to form second openings in the first polymeric layer, wherein locations of the second openings are defined by the etch mask. A material is deposited in the second openings to form meta-atoms of a first metastructure, wherein adjacent ones of the meta-atoms are separated from one another by polymeric material of the first polymeric layer. Optical devices including metastructures can be formed, where meta-atoms of the metastructure have a relatively high aspect ratio.

Abstract: A method for preparing a contact lens containing an ultraviolet (UV) blocker is disclosed. The method involves (a) polymerizing a monomeric mixture comprising (i) one or more contact lens-forming comonomers, and (ii) one or more UV blockers comprising a phenolic group having a protected hydroxyl moiety and one or more ethylenically unsaturated reactive groups to obtain a polymerization product comprising the one or more UV blockers comprising a phenolic group having a protected hydroxyl moiety, and (b) deprotecting the protected hydroxyl moiety of the one or more UV blockers of the polymerization product.

Abstract: A thin film optical lens and method for coating an optical substrate serves to apply alternating layers, with varying thicknesses, of a high index dielectric material and a low index dielectric material on first and second surfaces of an optical substrate. The high and low index dielectric materials are layered through thin film deposition. The low index dielectric material is SiO2. The high index dielectric material is ZrO2 and/or Indium Zinc Oxide. The spectral results from application of high and low index dielectric materials reduce infrared radiation, block HEV light transmission, and reduce backside ultraviolet reflections, while also increasing visible (ultraviolet) light transmission through the optical substrate. Thus, the layering of dielectric materials on the first surface of optical substrate reflects up to 40% of the infrared radiation; and the second surface of optical substrate transmits 99% of ultraviolet light in the wavelength range between 300 to 400 nanometers.

Abstract: An omnidirectional broadband antireflective with a super hydrophilicity (antifogging) coating composition, and a corresponding method of producing and coating on a substrate like glass plates and tubes, silicon wafer, or plastics selected from PMMA, PC, and CR-39 lenses, is provided. The composition contains: a) component A, an aqueous or organic solvent selected from DI water, ethanol, n-propanol, isopropanol, isopropoxy ethanol, or a mixture thereof; b) component B, alkaline or acid stabilized silica nanoparticles (highly positively or negatively charged silica nanoparticles), individually or a mixture thereof; and c) component C, an alkylsilane compound selected from 3-glycidoxypropyltrimethoxysilane, 2-glycidoxyethyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 2-glycidoxyethyltriethoxysilane, polyethylene glycol tert-octyl phenyl ether, and hydroxypropyl cellulose, individually or mixture thereof.

Abstract: An anti-reflection film includes a substrate; a first layer, comprising a metal oxide film, disposed on the substrate; and a second layer, comprising a fluorinated organic thin film having pores, disposed on the first layer.

Abstract: An infrared transmissive pane comprising an infrared transmissive substrate and an infrared transmissive coating, optical assemblies comprising the pane, and uses of the pane.

Abstract: A coated article includes a substrate, a first dielectric layer, a first metallic layer, a first primer layer, a second dielectric layer, a second metallic layer, a second primer layer, a third dielectric layer, a third primer layer, a third metallic layer, and a fourth dielectric layer. The total combined thickness of the metallic layers is at least 30 nanometers and no more than 60 nanometers. The article can have a sheet resistance of less than 0.85 ?/?, a visible light reflectance of not more than 10%, and a visible light transmittance of at least 70%.

Abstract: A manufacturing method for optical lens devices includes: providing a first scratch-resistant layer on a first outer surface of a first protective layer having a structural reinforcement function to form a first reinforced protective layer; providing a second scratch-resistant layer on a second outer surface of a second protective layer having a structural reinforcement function to form a second reinforced protective layer; forming a containing space layer between a first inner surface of the first protective layer and a second inner surface of the second protective layer; providing an intermediate layer in the containing space layer; the first scratch-resistant layer and the first protective layer commonly protecting a first side of the containing space layer while the second scratch-resistant layer and the second protective layer commonly protecting a second side of the containing space layer.

Abstract: Systems and methods of anti-smudge lens coatings are provided herein. The system can include an optically transparent substrate. The optically transparent substrate can include a lens. The system can include a lipophilic coating disposed on the optically transparent substrate. The lipophilic coating can disperse a contaminant disposed on the lipophilic coating such that the contaminant disposed on the lipophilic coating is optically transparent.

Abstract: A lens includes an optical portion configured to refract light, and a flange portion extending from the optical portion, wherein a first region having first surface roughness, a second region having second surface roughness, and a third region having third surface roughness are sequentially disposed from the optical portion toward the flange portion, on at least one of an object-side surface and an image-side surface of the flange portion, the first surface roughness and the third surface roughness are greater than the second surface roughness, and a light blocking portion is disposed in the second region.

Abstract: A lens with an adjustable surface profile can include an actuatable layer, an optical layer, and at least one actuator. The optical layer can include a deformable polymer, and the actuatable layer can have a surface profile that is configured to be adjustable using the at least one actuator. The optical layer, meanwhile, can be configured to deform when the at least one actuator actuates the actuatable layer.

Abstract: An electronic device is provided. The electronic device includes a substrate, a first light-shielding layer, a second light-shielding layer, a third light-shielding layer and an optical sensing element. The first light-shielding layer is disposed on the substrate and has a first opening. The second light-shielding layer is disposed on the first light-shielding layer and has a second opening. The third light-shielding layer is disposed on the second light-shielding layer and has a third opening. The optical sensing element is disposed on the substrate, and overlapped with the first opening. In addition, in a top-view diagram, centers of the first opening, the second opening and the third opening are separated from each other along a first direction, and the first direction is a line connecting a center of the first opening and a center of the third opening.

Abstract: A display includes a transmissive Spatial Light Modulator (SLM), and a second backlight having a film-based lightguide disposed above a first backlight. The first backlight may emit first light out of a first light emitting surface in a first light emitting region with a Full-Angular Width at Half-Maximum Luminous Intensity (FAWHMLI) in a first light output plane greater than 60 degrees. The second backlight may emit second light from a second light emitting surface in a second light emitting region positioned above the first light emitting region with a FAWHMLI in a second light output plane orthogonal to the second light emitting surface less than 50 degrees. In a first display mode, the first light passes through the film-based lightguide, and the first light emitting surface and illuminates the transmissive SLM, and in a second display mode the second light illuminates the transmissive SLM.

Abstract: An opto-electronic device to distribute an ultra-wide field of illumination is disclosed. In examples, the electronic device includes an optical source to generate light and a diffuser to receive and distribute the light. The diffuser includes a plurality of extensions, each having a reflective surface arranged at an angle to cause total internal reflection of an incident light ray, and an exit surface arranged at an angle relative to the reflective surface and configured to direct the light ray at one or more transmission angles different from an incident angle.

Abstract: A polarizing plate and an optical display apparatus are disclosed. A polarizing plate includes a polarizer and a stack of retardation layers on a surface of the polarizer, and the stack of retardation layers includes a second retardation layer and a first retardation layer stacked on the polarizer in sequence from the surface of the polarizer, the second retardation layer being a non-liquid crystal layer, and the stack of retardation layers has an out-of-plane retardation of ?40 nm or more to less than 0 nm at a wavelength of 550 nm and satisfies Relation 1.

Abstract: Multilayer optical films are described. In particular, multilayer optical films that include both birefringent high index layers and low index layers are disclosed. The low index layers can be a glycol-modified polyethylene terephthalate. These optical films can be reflective polarizers and may be particularly suitable for automotive, architectural, and industrial applications.

Abstract: Disclosed are a backlight module and a display apparatus. The backlight module includes a light guide plate (1), a light emitting surface (11) is divided into a light emitting region (A) and a peripheral region (B) surrounding the light emitting region (A); a lamp bar (2) having a light emergent direction facing a light incident surface (13); and a circuit board (3) connected with the lamp bar (2) and positioned at a side of a bottom surface (12) of the light guide plate (1), an overlapping portion between the circuit board (3) and the light guide plate (1) is formed into a connection region, and an orthographic projection of the connection region on the light emitting surface (11) is completely covers the peripheral region (B) and at least partially covers the light emitting region (A).

Abstract: An optical fiber comprises a glass fiber including a core and a cladding, and a coating resin layer for coating the glass fiber; the coating resin layer has a primary resin layer in contact with the glass fiber for coating the glass fiber, and a secondary resin layer for coating the primary resin layer; the primary resin layer includes a cured product of a first resin composition containing a silicone (meth)acrylate and a photopolymerization initiator; the secondary resin layer includes a cured product of a second resin composition containing a urethane (meth)acrylate and a photopolymerization initiator; and the amount of tin contained in the coating resin layer is 150 ppm or less in a mass ratio.

Abstract: A fiber-optic light guide is provided. The light guide includes plurality of optical fibers and an enveloping material. The plurality of optical fibers define a flexible fiber bundle. The flexible fiber bundle has a first diameter and a length along a longitudinal axis. The enveloping material encloses the plurality of optical fibers at one end of the flexible fiber bundle and over at least a part of the length to define a rigid portion. The plurality of optical fibers in the rigid portion are fused with one another. The flexible fiber bundle has a modified or formed cross-sectional geometry in a region of the enveloping material.

Abstract: A system can include one or more phase encoders. Each phase encoder of the one or more phase encoders is configured to receive an optical signal from an optical signal generator that generated the optical signal, and generate, using a ring resonator having a resonant frequency, a phase-encoded signal by encoding auxiliary information into a phase of the optical signal.

Abstract: An optical module includes: a substrate and a waveguide element having a mount face opposed to the substrate, the waveguide element having an interference waveguide portion having an optical interference function. Further, the mount face includes a projection region to which the interference waveguide portion is projected on the mount face and a non-projection region, and the waveguide element is joined to the substrate with a joint material in the non-projection region.

Abstract: An optoelectronic package structure is provided. The optoelectronic package structure includes a first photonic component, a second photonic component, and an interposer. The first photonic component is disposed over the second photonic component. The interposer is optically coupled between the first photonic component and the second photonic component. The interposer is configured to define a first signal path therebetween.

Abstract: A quantum device includes: a first optical waveguide configured to include diamond; and a second optical waveguide optically configured to be coupled to the first optical waveguide and include a material with a lower refractive index than diamond, wherein the first optical waveguide includes a first region configured to include a color center, a second region that propagates light that propagates in the first region to the second optical waveguide, and a third region connected to a side of the second region opposite to the first region and bonded to the second optical waveguide.

Abstract: A method includes: forming a first plurality of tiers that each comprises first and second dummy layers over a substrate, wherein within each tier, the second dummy layer is disposed above the first dummy layer; forming a second plurality of recessed regions in the first plurality of tiers, wherein at least one subgroup of the second plurality of recessed regions extend through respective different numbers of the second dummy layers; and performing an etching operation to concurrently forming a third plurality of trenches with respective different depths in the substrate through the at least one subgroup of the second plurality of recessed regions.

Abstract: A fusion splicing device according to one embodiment includes: a discharge electrode; a microscope acquiring luminance information from the optical fiber; a distribution information acquisition unit acquiring distribution information indicating a relationship between a position of the optical fiber in a radial direction and the luminance information; and a core position specification unit specifying a position of a core of the optical fiber from the distribution information. The microscope acquires the luminance information multiple times. The distribution information acquisition unit acquires the distribution information from each of a plurality of the luminance information.

Abstract: A multi-fiber cable assembly includes a pigtail segments spliced to a trunk segment using multiple mass fusion splices. The splices are disposed at axially spaced positions within a hollow, flexible conduit. Fibers of the trunk segment are axially fixed at a first demarcation region disposed at the first end of the conduit. Fibers of the pigtail segments are axially fixed at a separate, second demarcation region disposed at the second end of the conduit.

Abstract: A multi-fiber cable assembly includes a pigtail segments spliced to a trunk segment using multiple mass fusion splices. The splices are disposed within an encapsulation at a common axial location. A flexible conduit extends from one end of the encapsulation to protect bare fibers of the trunk segment. A protective sheath extends from the opposite end of the encapsulation to protect the pigtail segments. The conduit and sheath are axially fixed to the encapsulation.

Abstract: A photonic chip is especially sensitive to damp heat, because the encapsulation oxides that are used in standard wafer fabrication are typically deposited at lower temperatures and are of lesser quality. Accordingly, atomic layer deposition (ALD) is used to deposit a multi-layer, thin-film stack comprising alternating layers of dielectric layers and moisture barrier layers, e.g. metal oxide or semiconductor nitride, thin enough to be optically compatible with optical input/outputs, such as optical edge couplers in or on the chip. The ALD deposited layers are of high quality and protect the moisture sensitive oxide forming the majority of layers in the chip.

Abstract: An optical connector module (1) according to the present disclosure includes an optical waveguide board (10) and an optical connector (20) attached to the optical waveguide board (10). The optical connector (20) includes a positioning target portion (23) that engages with the optical waveguide board (10), and the optical connector (20) is positioned relative to the optical waveguide board (10) in a state in which the positioning target portion (23) is engaged with the optical waveguide board (10). The optical waveguide board (10) includes an optical waveguide (12) including a first cladding (122a) and a core (121) stacked on the first cladding (122a), the first cladding being stacked on a substrate (11) in a stacking direction perpendicular to the substrate (11), and a positioning core (14) that is stacked on the first cladding (122a) by using a material the same as a material of the core (121) and that engages with the positioning target portion (23).

Abstract: A spot size converter includes: a first core layer extending in a first direction and stacked on a cladding layer in a second direction; and a second core layer spaced apart from the first core layer in a third direction. The first core layer has a flat shape in which a size in the second direction is smaller than a size in the third direction, and includes a first tapered portion in which a size thereof in the third direction decreases along an emission direction. A size of the second core layer in the second direction is larger than that of the first core layer in the second direction, and includes a second tapered portion in which a size thereof in the third direction increases along the emission direction. The second tapered portion is disposed to overlap the first tapered portion in the third direction.

Abstract: A large-scale silicon-photonics-based optical switching system that occupies an area larger than the maximum area of a standard step-and-repeat lithography reticle is disclosed. The system includes a plurality of identical switch blocks, each of is formed in a different reticle field that no larger than the maximum reticle size. Bus waveguides of laterally adjacent switch blocks are stitched together at lateral interfaces that include a second arrangement of waveguide ports that is common to all lateral interfaces. Bus waveguides of vertically adjacent switch blocks are stitched together at vertical interfaces that include a first arrangement of waveguide ports that is common to all vertical interfaces. In some embodiments, the lateral and vertical interfaces include waveguide ports having waveguide coupling regions that are configured to mitigate optical loss due to stitching error.

Abstract: A heat dissipation structure of an optical transceiver includes a housing, a frame, a uniform heat component, an outer fin and an elastic clamping component. The housing has an accommodating space, extends along a lengthwise direction, and is divided into an exposed section and a hidden section in the lengthwise direction. The part of the uniform heat component corresponding to the hidden section is embedded in the accommodating space. The heat conductive block is disposed in the accommodating space and is in thermal contact with the uniform heat component. The outer fin is disposed at the exposed section and is in thermal contact with the uniform heat component. The elastic clamping component clamps both sides of the outer fin in a widthwise direction, and has a pushing member in a lengthwise direction, wherein the pushing member pushes the frame to move the outer fin inward along the lengthwise direction.

Abstract: A fiber optic adaptor has a first face defining a first central axis and a second face opposite the first face defining a second central axis, wherein the first central axis is at an angle relative to the second central axis. In one embodiment, the angle matches the angle of the front face of an APC connector.

Abstract: A fiber optic connector and cable assembly includes a cable with one or more strength members secured to a connector that is connectable to both a hardened and a non-hardened fiber optic adapter. The cable can include multiple cable types with various shapes and strength member configurations. The connector includes a connector housing having a one-piece main body and a cover piece mounted thereon. The one-piece main body defines a plug portion compatible with the adapters. A ferrule assembly is mounted in the plug portion and biased outwardly by a spring. An insert within the connector housing includes a spring stop for holding the spring and a cable retention portion for securing the strength members of the cable. The spring stop and the cable retention portion can be included on a one-piece insert or they can separately be included on separate inserts.

Abstract: Fiber optic connectors, cable assemblies and methods for making the same are disclosed. In one embodiment, the optical connector comprises a housing and a multifiber ferrule. The housing comprises a longitudinal passageway between a rear end and a front end, and, a part of the rear portion of the housing comprises a round cross-section and a part of the front portion of the housing comprises a non-round cross-section.

Abstract: A new boot for a fiber optic connector has a ribbed back portion, a center portion, and a forward extending portion that can be used to insert and remove the fiber optic connector to receptacle. The ribbed back portion has grasping elements and is connected to the center portion. The center portion is removably connected to a crimp body that is in turn connected to the connector housing. The front extension is connected to the fiber optic connector and also provides a keying feature depending on the side of the fiber optic connector on which it is installed.

Abstract: A multi-fiber, fiber optic connector may include a reversible keying arrangement for determining the orientation for plugging the connector into an adapter to thereby allow for a change in polarity of the connection to be made on site. The connector housing may be configured to engage with a removable key that may be engaged with the housing in at least two different locations to provide the plug-in orientation, or the housing may have slidably displaceable keys movable between multiple positions on the housing.

Abstract: Optical interconnect topologies may be provided using microLEDs. The topologies may interconnect ICs. The optical interconnect topologies may be used in some instances in place of electrical busses.

Abstract: Disclosed is an optical device including a first lens and a second lens. The first lens of the optical device is joined to an end surface of an optical waveguide of an optical element to emit light emitted from the optical element. The second lens is optically coupled with the first lens to convert the light emitted from the first lens into collimated light.

Abstract: Optical components and optical electronic devices, and methods for making optical components and optical electronic devices. As non-limiting examples, various aspects of this disclosure provide various optical component and optical electronic devices, and methods for making thereof, that comprise three-dimensional structured glass configurations.