Abstract: In a method for determining at least one physical parameter, a sensor unit which is activated by at least one periodic excitation (1.4) is provided, wherein the sensor unit has at least one detection region in which changes of the parameter in the surroundings of the sensor unit lead to output signal (1.7) from the sensor unit. The sensor unit is wired such that if there are no changes of the parameter in the detection region the output signal (1.7) is a zero signal or virtually a zero signal at the output of the sensor unit, whereas if there are changes of the parameter in the detection region the output signal (1.7) is a signal that is not zero and has a specific amplitude and phase. In a closed control loop, the non-zero signal in the receive path is adjusted to zero using a control signal to achieve an adjusted state even in the presence of changes of the parameter in the detection region. The control signal is evaluated in order to determine the physical parameter. The output signal (1.

Abstract: A high-frequency electromagnetic induction system includes a frequency generator coupled to a transmitter coil, a receiver coil coupled to a processor and a high frequency and polarizability data profile for an object of interest. The high frequency and polarizability data profile includes a data object having an array of frequency values and magnetic polarizability values, which are obtained from the object of interest and processed by the processor. Also described is a method for populating the high frequency and polarizability data profile.

Abstract: A method of land surveying that electronically registers together multi-layer underground and surface images of a surface volume with buried utilities and other infrastructures. Such method further comprises assembling and presenting the combition to a device in the field that visually guides crews in their safe digging of the ground nearby. The orienting, scaling, and registering of a first image layer is to a standardized orientation and scaling on a map of a photograph of a land surface from a zenith point in space above. Then the orienting, scaling, and registering of a second image layer is made to the standardized orientation and scaling on the map. This layer is a result of an ground penetrating radar investigation of buried objects point-by-point in an immediate search area of a corresponding ground surface. Underground buried objects and utilities are thereby located to make safe digging nearby.

Abstract: A downhole drilling tool is adapted to be placed in a borehole formed in the earth. The downhole drilling tool has mounted thereto at least one of a transmitter for generating and a receiver for sensing at least one component of an electromagnetic field within a distant earth region. The tool also has a device configured to acquire subsurface data from the at least one component of the electromagnetic field; and a device configured to calculate a resistivity distribution of the distant earth region from the subsurface data. A geophysical survey is performed with a downhole drilling tool by transmitting at least one component of an electromagnetic field through the distant earth region; acquiring subsurface data from the at least one component of the electromagnetic field; and calculating a resistivity distribution of the distant earth region from the subsurface data.

Abstract: Covers and methods to protect outer surfaces of marine equipment are provided. The covers are manufactured to extend along at least one dimension. The covers may have antifouling properties due to the thread used to manufacture the covers or due to treatment applied to the covers after manufacturing. The covers are removably mounted on one or more pieces of marine survey equipment, without employing fastening mechanisms.

Abstract: A system and method of injection well identification using tracer particles is disclosed. A collector-reader for analyzing magnetic particles in a fluid that is moving with respect to the collector-reader includes an array of magnets whose magnetization direction is varied so as to create regions of high magnetic field gradient in the fluid, a stopper configured to concentrate spatially the particles attracted to the array, and a reader including a source configured to excite the particles concentrated by the stopper and a detector configured to capture a particle excitation signature emitted by the magnetic particles. A method for observing a subterranean reservoir penetrated by a production well and two or more injection wells is also disclosed.

Abstract: A method is provided for determining a mud weight window for an oil and gas well. One implementation of the method includes creating a 3D finite element model for at least a portion of the field in which the well is located. Next, at least three components of stress are determined using the 3D finite element model. The values of at least three of the stress components from the 3D finite element model may then be extracted and integrated with a ID analytical model for the well to determine the mud weight window for the well.

Abstract: An optical element includes an optical surface having a multilayer film. The multilayer film comprises a stack that includes a first film having a first refractive index for a used wavelength and a second film having a second refractive index for the used wavelength smaller than the first refractive index. Outermost layers of the stack are configured by the first films. A film configuration of the stack has symmetry along with a stack direction. The predetermined conditional expressions are satisfied.

Abstract: An optical lens includes: (i) a temporary coating for protection against degradation at least partially covering a surface of the lens, the temporary protective coating including an outermost layer mechanically degradable through friction and/or contact, and (ii) a removable film having a first side and a second side, which adheres to the outermost layer of the temporary protective coating through its first side, the first side of the removable film including at least one surface portion, which, when applied to the outermost layer of the temporary protective coating, includes at least one adherent zone and at least one non-adherent zone distributed across the surface portion.

Abstract: There is provided a metal-based particle assembly comprising 30 or more metal-based particles separated from each other and disposed in two dimensions, the metal-based particles having an average particle diameter in a range of from 200 to 1600 nm, an average height in a range of from 55 to 500 nm, and an aspect ratio, as defined by a ratio of the average particle diameter to the average height, in a range of from 1 to 8, wherein the metal-based particles are disposed such that an average distance between adjacent metal-based particles may be in a range of from 1 to 150 nm. This metal-based particle assembly presents significantly intense plasmon resonance and also allows plasmon resonance to have an effect over a range extended to a significantly large distance.

Abstract: Light control films, and lighting devices including the same, are disclosed. The light control films include a single layer of light transmitting material having a first side and a second side. A plurality of first microstructures are formed in the first side. The first microstructures are configured to receive incident light from a light source and produce an off axis (e.g. batwing) light distribution in a field downstream of the second side of the light control film. In some embodiments, a plurality of second microstructures is formed on the second side of the light control films and are configured to reduce the glare produced by light emitted from the light source passing through the film.

Abstract: A head-mounted display including a first optical system is provided. The first optical system includes an image surface, a stop surface, a first optical stack disposed between the image surface and the stop surface and a second optical stack disposed between the first optical stack and the stop surface. The first optical stack includes a first optical lens and a partial reflector. The second optical stack includes a second optical lens, a multilayer reflective polarizer and a first quarter wave retarder disposed between the multilayer reflective polarizer and the first optical stack. The multilayer reflective polarizer may be convex toward the image surface along orthogonal first and second axes.

Abstract: A polygon mirror made of plastic is provided. The polygon mirror has a plurality of reflecting surfaces, a first surface intersecting the plurality of reflecting surfaces at a first side, a second surface intersecting the plurality of reflecting surfaces at a second side opposite to the first side, with a through hole provided to extend through the first surface and the second surface at a center of the polygon mirror. The polygon mirror includes a plurality of gate marks of injection molding. When viewed from an extending direction of the through hole, the gate marks are located on straight lines passing through the center and vertices of the first surface, and are rotationally symmetric with respect to the center.

Abstract: A multi-band pass filter may include a filter layer including a plurality of different epsilon-near-zero (ENZ) material layers that are sequentially arranged; and an aperture-defining layer that is disposed on the filter layer and comprises at least one aperture. The filter layer may be exposed to incident light through the at least one aperture, and may be configured to pass a plurality of wavelength regions of the incident light.

Abstract: A display unit includes a plurality of light-emitting sections and an optical filter. The plurality of light-emitting sections emit color light beams having different colors. The optical filter is disposed on light emission side of the plurality of light-emitting sections, and transmits the color light beams while selectively removing a part of a wavelength band of the color light beams. The optical filter includes the first filter layer and the second filter layer. The first filter layer transmits a first band including a center wavelength out of the wavelength band of each of the color light beams, and removes a second band that is at least a part of a band other than the first band. The second filter layer reduces transmissivity of a third band that is a part of the first band of at least one color light beam out of the color light beams.

Abstract: Methods of making optical films and optical stacks are described. A method of making an optical stack includes providing a thermoform tool centered on a tool axis and having an external surface rotationally asymmetric about the tool axis; heating an optical film resulting in a softened optical film; conforming the softened optical film to the external surface while stretching the softened film along at least orthogonal first and second directions away from the tool axis resulting in a conformed optical film rotationally asymmetric about an optical axis of the conformed film where the optical axis coincident with the tool axis; cooling the conformed optical film resulting in a symmetric optical film rotationally symmetric about the optical axis; and molding an optical lens on the symmetric optical film resulting in the optical stack.

Abstract: Optical systems including first and second optical stacks and adapted to provide an adjustable dioptric correction are described. The first optical stack includes a first optical lens and a partial reflector. The second optical stack is convex along orthogonal first and second axes and includes a second optical lens and a reflective polarizer. The reflective polarizer has at least one first location having a radial distance r1 from an optical axis of the second optical stack and a displacement s1 from a plane perpendicular to the optical axis at an apex of the reflective polarizer, where s1/r1 is at least 0.1. A quarter wave retarder is disposed between the second optical stack and the first optical stack.

Abstract: An optical film includes a polarizer and a protection film disposed the polarizer and including a polymer having a glass transition temperature of greater than about 100° C., where the polymer is a terpolymer consisting of: a first structural unit derived from styrene or a styrene derivative; a second structural unit derived from maleimide, maleic anhydride, acrylonitrile, a derivative thereof or a combination thereof; and a third structural unit derived from (meth)acrylate or a derivative thereof.

Abstract: A backlight unit may be provided which is capable of local dimming. The backlight unit includes: one or a plurality of light emitting devices; and a light guide plate including a top surface and a bottom surface, one or a plurality of grooves which are formed in the bottom surface and in which the light emitting device is disposed, a reflective layer which is disposed within the one or the plurality of grooves and reflects light emitted from the light emitting device, and a plurality of inverse prism patterns disposed in the top surface.

Abstract: A display device including a backlight unit and a display panel disposed on the backlight unit. The backlight unit includes a light guide plate, a wavelength conversion layer, and a cover member. The light source unit is disposed adjacent to a surface of the light guide plate. The wavelength conversion layer is disposed between the light source unit and the light guide plate, and contacts the surface of the light guide plate. The cover member is disposed between the light source unit and the light guide plate, and seals the wavelength conversion layer.

Abstract: According to one embodiment, a light source device includes a light source element including a first light emitting element which emits light of a first wavelength and a second light emitting element which emits light of a second wavelength, a first wavelength conversion material which is excited by the light from the first light emitting element to emit light of a third wavelength, and a second wavelength conversion material which is excited by the light from the second light emitting element to emit light of a fourth wavelength, wherein cyan light produced by the light emission of the first light emitting element and magenta light produced by the light emission of the second light emitting element are emitted from the same light emitting surface.

Abstract: A display device includes a display panel, a light source, and an optical component which provides a light from the light source to the display panel, includes a light guide film and an optical sheet, is coupled to the light guide film and includes a base film and optical layers disposed between the base film and the light guide film to control a traveling direction of the light where each of the optical layers overlaps the base film by a first width, each of the optical layers overlaps the light guide film by a second width, the first width is greater than a height of each of the optical layers, and a value obtained by dividing the second width by the first width is greater than about zero (0) and smaller than about 0.2.

Abstract: Aspects of this invention relate to a system that provides an illuminated feature for an LED luminaire that can be used with opposite linear runs of LEDs to light the edges or sides of a luminaire without requiring additional LEDs.

Abstract: A display device includes a display panel, a backlight unit, a bottom cover and a reflective member. The bottom cover defines a bottom portion thereof on which the backlight unit is supported. The bottom portion defines a plurality of edges thereof. The bottom portion is bent at a first edge thereof to define a first sidewall of the bottom cover, the first sidewall facing a light incident surface of a light guide plate. The first sidewall is bent to define a support portion of the bottom cover at the light incident surface of the light guide plate, the support portion extended to face the bottom portion and support the display panel thereon. The reflective member is coupled to the support portion, partially overlaps an emission surface of the light guide plate and has a same thickness as the support portion.

Abstract: Exemplary embodiments of the inventive concept provide a display device including a bottom cover having a bottom portion and a sidewall and a support frame. The bottom portion has at least one rounded corner having a first radius, and a sidewall is bent upward from an edge of the bottom portion. The support frame includes at least one rounded corner having a shape corresponding to the rounded corner of the bottom portion and having a second radius greater than the first radius.

Abstract: A backlight module includes a backplane, a light guide plate arranged in the backplane, a backlight source arranged in the backplane and located at one side of the light guide plate, a quantum dot rail arranged between the backlight source and the light guide plate, and a retention rack that is fixedly mounted to the backplane to receive and retain a first side of the quantum dot rail. The retention rack includes a trough section in the form of a concave recess receiving and retaining the first side of quantum dot rail therein. The quantum dot rail has a second side that is opposite to the first side and a reflection sheet is attached to the second side of the quantum dot rail such that the reflection sheet is opposite to the trough section of the retention rack mounted to the backplane.

Abstract: Microstructured optical fiber (MOF) includes a cladding extending a length between first and second ends. The cladding includes an inner porous microstructure that at least partially surrounds a hollow core. A perimeter contour of the hollow core has a non-uniform radial distance from a center axis of the cladding such that first segments of the cladding along the perimeter contour have a shorter radial distance from the center axis relative to second segments of the cladding along the perimeter contour. The cladding receives and propagates light energy through the hollow core, and the inner porous microstructure substantially confines the light energy within the hollow core. The cladding defines at least one port hole that extends radially from an exterior surface of the cladding to the hollow core. Each port hole penetrates the perimeter contour of the hollow core through one of the second segments of the cladding.

Abstract: An optical fiber with large effective area, low bending loss and low attenuation. The optical fiber includes a core, an inner cladding region, and an outer cladding region. The core region includes a spatially uniform updopant to minimize low Rayleigh scattering and a relative refractive index and radius configured to provide large effective area. The inner cladding region features a large trench volume to minimize bending loss. The core may be doped with Cl and the inner cladding region may be doped with F.

Abstract: A solution for fabricating a structure including a light guiding structure is provided. The light guiding structure can be formed of a fluoropolymer-based material and include one or more regions, each of which is filled with a fluid transparent to radiation having a target wavelength, such as ultraviolet radiation. The region(s) can be created using a filler material, which is at least substantially enclosed by the fluoropolymer-based material and subsequently removed from each region. The structure can further include at least one optical element integrated into the light guiding structure.

Abstract: Embodiments are directed to a coupler system having an interposer configured to couple optical signals. The interposer includes at least one optoelectronic component formed on a glass substrate. The interposer further includes at least one waveguide formed on the glass substrate and configured to couple the optical signals to or from the at least one optoelectronic component, wherein the at least one waveguide comprises a waveguide material having grain diameters greater than about one micron and an optical loss less than about one decibel per centimeter of optical propagation.

Abstract: A semiconductor structure and a method for manufacturing the semiconductor structure are provided. The semiconductor structure includes a processed semiconductor substrate. The processed semiconductor substrate includes active electronic components. The semiconductor structure also includes a dielectric layer that covers, at least partially, the processed semiconductor substrate. An interface layer that is suitable for growing optically active material on the interface layer is bonded to the dielectric layer. An optical gain layer and the processed semiconductor substrate are connected through the dielectric layer by electric and/or optical contacts.

Abstract: An optimized SOI 2×2 multimode interference (MMI) coupler is designed by use of the particle swarm optimization (PSO) algorithm. Finite Difference Time Domain (FDTD) simulation shows that, within a footprint of 9.4×1.6 ?m2, <0.1 dB power unbalance and <1 degree phase error are achieved across the entire C-band. The excess loss of the device is <0.2 dB.

Abstract: An optical coupling adaptor couples an optical fiber to a photonic integrated circuit (PIC) chip. The adaptor once connected to the PIC chip forms a chip-adaptor assembly. The photonic integrated circuit (PIC) chip has a plurality of inverted taper waveguides having an enlarged optical mode. The optical coupling adaptor has a first section having a plurality of ridge waveguides between layers of cladding and also separated laterally by cladding and a second section abutting the first section, the second section having a plurality of trenches each filled with an optical polymer that Once cured has a refractive index that matches that of the ridge waveguides. The optical coupling adaptor is adhered to the PIC chip using the optical polymer as an adhesive such that the optical polymer in the trenches once cured form polymer waveguides that confine the enlarged mode of the inverted taper waveguides.

Abstract: Trunk gland adapters include an adapter body having an internal bore that is sized to receive a trunk cable gland so that a front end of the trunk cable gland extends through a front opening of the internal bore and a plurality of attachment clips that are configured to releasably attach the adapter body to a mounting aperture in a wall of a fiber optic enclosure. Related trunk gland units and methods of routing a trunk cable into an enclosure are also disclosed.

Abstract: The invention provides an optical connector for coupling with a complementary optical connector and for supporting an optical component. The connector comprises a cover moveable between a first and second position. The cover may also comprise a moveable shield and biasing components. There is also provided an optical connector assembly comprising covers that sequentially open. A PCB comprising waveguides and an optical component sub-mount for integrating with the PCB is also presented.

Abstract: A fiber optic ferrule comprising a ferrule body having a plurality of optical fiber insertion holes at a first end thereof, the plurality of optical fiber insertion holes being configured to receive a plurality of optical fibers, and an extended access opening arranged at a top surface of a second end of the ferrule body located opposite the first end, the extended access opening being configured to provide open access to substantially an entirety of an interior space within the ferrule body.

Abstract: Various embodiments are directed to a connector for coupling optical signals to a semiconductor device. In one embodiment, the connector includes a connector member having a recessed portion to arrange a plurality of waveguides formed side-by-side in a transverse direction. A backup member is arranged within the recessed portion interposing the plurality of waveguides between the connector member and the backup member. The recessed portion includes a plurality of ridges arranged in a staggered pattern relative to the plurality of waveguides for positioning the plurality of waveguides relative to the connector.

Abstract: This optical receptacle comprises the following: an optical-receptacle body that is formed via injection molding; a first optical surface; a second optical surface on a first side; a first concavity that has an angled surface whereby light that has entered via the first optical surface is reflected towards the second optical surface; a gate section on a third side; a first through-hole and a second through-hole that extend in the direction of the axis of light traveling between the second optical surface and a light-transporting body; and a second concavity located between the first concavity and the third side. The part of the second concavity closest to a second side is closer to the abovementioned first side than the part of the gate section closest to the first side is. The first through-hole also opens to a first-side surface and a second-side surface of the second concavity.

Abstract: An optical module includes: a board configured to be equipped with an optical element that carries out photoelectric conversion; a flexible optical waveguide configured to guide light output from the optical element or light to be input to the optical element; and a chassis including: a housing part configured to house the board, and a passage configured to lead the flexible optical waveguide to outside of the housing part and bend in such a manner that one or more steps are formed along a wave guiding direction of the flexible optical waveguide.

Abstract: This optical receptacle has the following: a first surface that includes a first optical surface and a third optical surface; a reflective surface whereby the light inputted via the first optical surface is reflected in a direction parallel to a substrate; an optical separation unit whereby the light reflected off the reflective surface is separated into monitoring light and signal light; a transmitting surface through which the signal light separated out by the optical separation unit is transmitted; a third surface that includes a second optical surface via which the signal light that has been transmitted through the transmitting surface is outputted towards the end face of the aforementioned light-transporting body; and a reflected-monitoring-light avoidance means whereby monitoring light that has reached the detection element is guide so as not to return to the abovementioned light-emitting element.

Abstract: An optical apparatus includes: a semiconductor optical device integrating an optical coupler, an optical element, and an electrical circuit; and a printed circuit board including a main body and a metal piece. The body has first and second openings. The first opening, the metal piece and the second opening are arranged in a direction of a first axis. The first and second openings extend from the front and back faces of the body along the direction to the first and second faces of the metal piece, respectively. The metal piece is supported by the body. The semiconductor optical device is mounted on the first face of the metal piece in the first opening. The body has a supporting face connecting the first side of the first opening with the second side of the second opening and supporting the second face of the metal piece in the first opening.

Abstract: An optical apparatus includes: a semiconductor optical device integrating optical couplers, an optical element for processing a light beam associated with each of the optical couplers, and a circuit for processing an electrical signal associated with the optical element; a printed circuit board electrically connected with the semiconductor optical device, the printed circuit board including a main body and a metal piece, the main body having a first opening and a second opening, and the metal piece being held by the main body; and a first electrical component mounted on the printed circuit board. The metal piece has a first face and a second face opposite to the first face, the first opening and the second opening extend to the first face and the second face of the metal piece. The semiconductor optical device is mounted on the first face of the metal piece in the first opening.

Abstract: A constructed photodetector, an optical receiver, and a receiver unit in an optical communication system are disclosed. One example of the disclosed constructed photodetector includes an optoelectronic element having an active area that converts light having a wavelength of interest into electrical signals and a substrate on a face that opposes the active area, where the substrate is non-transparent to light having the wavelength of interest. The constructed photodetector further includes a lens-chip that is at least partially transparent to light having the wavelength of interest, where the lens-chip includes a first side and an opposing second side, where the first side of the lens-chip includes an integrated lens, and where the second side of the lens-chip includes one or more electrical traces. The constructed photodetector further includes at least one connector that provides a physical and electrical connection between the optoelectronic element and the lens-chip.

Abstract: A novel, hybrid optical fibre stub device comprises a first ferrule transparent to UV light and a second ferrule including a conventional material. An optical fibre is disposed through the first ferrule and second ferrule. The input and output faces of the optical fibre are prepared suitable for optical coupling. A photonic device is coupled to the first optical fibre surface. A UV curable epoxy is disposed between the photonic device and the first optical fibre surface. The UV curable epoxy includes an index of refraction between an index of refraction of the first optical fibre and an index of refraction of the photonic device. A second optical fibre is coupled to the first optical fibre.

Abstract: An optical connecting part includes: a holder including an end face for optical connection, one or more optical waveguides and a through-hole, the optical waveguides having a portion extending from the end face in a direction of a first axis, the through-hole extending from the end face in the direction of the first axis; and a coating disposed on an inner surface of the through-hole, the coating having oil repellency. The coating on the inner surface of the through-hole forms a guide hole.

Abstract: An optical connector includes at least one optical fiber, and a ferrule configured to hold the optical fiber. In the optical connector, the ferrule has a hook and a presser member on a front part of a bottom face of the ferrule, and a projection on a rear part of the bottom face of the ferrule, in a connecting direction, and the optical fiber is held obliquely downward from a rear end of the ferrule toward the presser member of the ferrule.

Abstract: An example optoelectronic module includes a housing that extends between a first end portion and a second end portion. The optoelectronic module includes a printed circuit board (“PCB”) that includes an electrical connector at the second end portion of the housing, at least one transmitter electrically coupled to the PCB and optically coupled with at least one optical fiber, at least one receiver electrically coupled to the PCB and optically coupled with at least one optical fiber, and at least one electromagnetic interference (“EMI”) attenuating component formed of a plastic material that is configured to attenuate EMI. The EMI attenuating component is configured to attenuate EMI generated by one or more other components of the optoelectronic module.

Abstract: An optical fiber adapter according to the present disclosure includes a main body, an inner housing, an elastic shutter member and a spring. The main body has an axial accommodation room defined by a first wall, a second wall, a third wall and a fourth wall. The accommodation room has opposing first and second openings in the axial direction. The inner housing is placed within the accommodation room and includes a hollow cylinder extending from the front surface of a flange. The shutter member is positioned within the accommodation room and includes a base portion, a shutter plate and a connecting portion. The connecting portion connects the base portion with the shutter plate. The shutter plate extends from the connecting portion and arrives in front of an opening of the hollow cylinder. The shutter plate is movable with respect to the base portion. The spring is positioned within the accommodation room to push the shutter member toward the first opening of the accommodation room.

Abstract: A fiber optic cable network interface device includes a base unit defining an interior cavity. The device has a cable entrance port for a main fiber optic cable having a plurality of individual fiber optic cables and at least one cable exit port for at least one distribution fiber optic cable. The cable exit port includes a first portion of a retaining mechanism. The device includes a bulkhead connector retained to the base unit wherein the bulkhead connector is configured to connect the main cable to one of the one of the cables of the main cable to a distribution cable. The device includes a clampshell that engages the distribution fiber optic cable and transition a jacketing of the distribution fiber optic cable from an interior jacket to an exterior jacket wherein an exterior surface of the clampshell comprises a second portion of the retaining mechanism.

Abstract: An organizer for an optical fibre cable has at least two loop retaining sections (16; 33) facing each other with a predetermined distance such that a loop (10) of the optical fibre cable (12) is restrained between the loop retaining sections (16; 33) by an elastic resetting force of the looped optical fibre cable (10). Certain types of organizers are removably mounted to a base to be free-standing.