Abstract: The disclosure provides an optical imaging lens assembly, which sequentially includes, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens with refractive power respectively. Each of the fourth lens, the fifth lens and the sixth lens has negative refractive power. A total effective focal length f of the optical imaging lens assembly satisfies f>7.5 mm. A curvature radius R11 of an object-side surface of the sixth lens, a curvature radius R12 of an image-side surface of the sixth lens, a refractive index N6 of the sixth lens and an abbe number V6 of the sixth lens satisfy 1.0 mm?1<V6/(R11+R12×N6)<2.0 mm?1.

Abstract: Methods and systems for imaging removable dental appliances. Image data taken while a removable dental appliance was worn on a patient's teeth may be used to identify one or more locations of undesirable contact between the removable dental appliance and the patient's teeth and/or one or more attachments on the patient's teeth. The one or more locations of undesirable contact can correlate with undesirable tooth movement compared to expected tooth movement according to a treatment plan. A three-dimensional (3D) model of the removable dental appliance and the patient's teeth may be displayed on a user interface, with the identified one or more locations of undesirable contact highlighted in the 3D model. An alert of the identified one or more locations of undesirable contact may be emitted via the user interface.

Abstract: A lens driving apparatus includes a base, a housing disposed on the base, a bobbin disposed inside the housing, a first coil disposed on the bobbin, a magnet disposed on the housing, a second coil disposed on the base, an upper elastic member connecting the housing and the bobbin, and a support member electrically connected with the upper elastic member. The housing includes an upper surface facing the upper elastic member. The upper surface of the housing includes a first surface, a second surface disposed lower than the first surface and a third surface disposed lower than the second surface. A portion of the upper elastic member is disposed on the first surface of the housing. The housing includes a hole formed on the third surface. The support member passes through the hole of the housing.

Abstract: Sampled data is packaged in checkerboard format for encoding and decoding. The sampled data may be quincunx sampled multi-image video data (e.g., 3D video or a multi-program stream), and the data may also be divided into sub-images of each image which are then multiplexed, or interleaved, in frames of a video stream to be encoded and then decoded using a standardized video encoder. A system for viewing may utilize a standard video decoder and a formatting device that de-interleaves the decoded sub-images of each frame reformats the images for a display device. A 3D video may be encoded using a most advantageous interleaving format such that a preferred quality and compression ratio is reached. In one embodiment, the invention includes a display device that accepts data in multiple formats.

Abstract: Sampled data is packaged in checkerboard format for encoding and decoding. The sampled data may be quincunx sampled multi-image video data (e.g., 3D video or a multi-program stream), and the data may also be divided into sub-images of each image which are then multiplexed, or interleaved, in frames of a video stream to be encoded and then decoded using a standardized video encoder. A system for viewing may utilize a standard video decoder and a formatting device that de-interleaves the decoded sub-images of each frame reformats the images for a display device. A 3D video may be encoded using a most advantageous interleaving format such that a preferred quality and compression ratio is reached. In one embodiment, the invention includes a display device that accepts data in multiple formats.

Abstract: An optical element including an optically transparent lens which defines a curved surface having a steepness given by an R/# of from about 0.5 to about 1.0. A film is positioned on the curved surface. The film includes an index layer. A composite layer is positioned on the curved surface having a refractive index greater than the index layer. The composite layer includes HfO2 and Al2O3. The composite layer has a mole fraction X of HfO2, wherein X is from about 0.05 to about 0.95 and a mole fraction of Al2O3 in the composite layer is 1?X.

Abstract: Sampled data is packaged in checkerboard format for encoding and decoding. The sampled data may be quincunx sampled multi-image video data (e.g., 3D video or a multi-program stream), and the data may also be divided into sub-images of each image which are then multiplexed, or interleaved, in frames of a video stream to be encoded and then decoded using a standardized video encoder. A system for viewing may utilize a standard video decoder and a formatting device that de-interleaves the decoded sub-images of each frame reformats the images for a display device. A 3D video may be encoded using a most advantageous interleaving format such that a preferred quality and compression ratio is reached. In one embodiment, the invention includes a display device that accepts data in multiple formats.

Abstract: An optical imaging system includes a first lens group that can move in an optical direction and has negative refractive power; a second lens group that can move in the optical direction and has positive refractive power; and a third lens group that can move in the optical direction and has negative refractive power. The first lens group, the second lens group, and the third lens group include seven lenses in total, and at least one of the seven lenses includes an aspherical surface.

Abstract: The present disclosure relates to a suspension projection device based on a reflection modulation type metasurface. The suspension projection device comprises a metasurface, wherein a cubic column array is machined on one side of the metasurface, the cross section of a cubic column in the cubic column array is a square, the side length of the square ranges from 10 to 500 ?m, and the height of the cubic column ranges from 50 to 800 ?m; and incident light enters from one end of the cubic column, and exits from the other end of the cubic column after several total internal reflections within column. According to the suspension projection device, the cost of suspension projection is reduced.

Abstract: An imaging lens assembly module has an optical axis, and includes at least one plastic lens element, a carrier element and a light absorbing layer. The plastic lens element, in order from a center to a peripheral region thereof, includes an optical effective portion and a peripheral portion. A side of the peripheral portion includes a plurality of step structures interposed between the side of the peripheral portion and a same side of the optical effective portion. The carrier element defines an inner space for disposing the plastic lens element, and includes a tip end minimal opening and a plurality of annular inner walls. The light absorbing layer is disposed on the peripheral portion of the plastic lens element, and the step structures and the at least one of the annular inner walls facing towards the plastic lens element.

Abstract: An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially arranged on an optical axis from an object side to an image side, wherein an image-side surface of the first lens and an image-side surface of the sixth lens may be concave, and 0.7<TL/f<1.0 and |Nd2?Nd3|<0.2 in which TL may be a distance from an object-side surface of the first lens to an imaging plane, f may be an overall focal length of the optical imaging system, Nd2 may be a refractive index of the second lens, and Nd3 may be a refractive index of the third lens.

Abstract: An optical lens device for a head-mounted display includes a transparent support substrate and a Fresnel lens disposed thereon. The Fresnel lens includes a central lens element and a plurality of prismatic elements arranged relative to the central lens element in a proximal-to-distal manner. Each of the prismatic elements has a base facing toward the support substrate, and a draft facet and a sloped facet extending from the base away from the support substrate to intersect with each other to form an apex. Each of the prismatic elements has a height measured from the base to the apex and not greater than 75 ?m. The base has a width not greater than 250 ?m. A method and a mold for producing the optical lens device are also disclosed.

Abstract: A spectacle lens, which is manufactured by additive manufacturing, includes interspersing first volume elements and second volume elements. The first and second volume elements are arranged on the grid points of a geometric grid to form a first sub-grid and a second sub-grid, respectively. The first sub-grid forms the first part of the spectacle lens having a dioptric effect for vision for a first object distance and the second sub-grid forms the second part of the spectacle lens having a dioptric effect for vision for a second object distance, which differs from the first object distance.

Abstract: Sampled data is packaged in checkerboard format for encoding and decoding. The sampled data may be quincunx sampled multi-image video data (e.g., 3D video or a multi-program stream), and the data may also be divided into sub-images of each image which are then multiplexed, or interleaved, in frames of a video stream to be encoded and then decoded using a standardized video encoder. A system for viewing may utilize a standard video decoder and a formatting device that de-interleaves the decoded sub-images of each frame reformats the images for a display device. A 3D video may be encoded using a most advantageous interleaving format such that a preferred quality and compression ratio is reached. In one embodiment, the invention includes a display device that accepts data in multiple formats.

Abstract: A system for imaging and examination of a cervix, comprising a control module connectable with a changeable head configured to image the cervix and collect a tissue biopsy, the head selected from a group consisting of a digital colposcope module, a transvaginal optical probe module and an endo-cervical endoscope module. The system may additionally comprise light source(s) to illuminate cervix tissue; sensing device(s) to generate signal(s) from light and/or to acquire image(s) of a portion of a cervix; and processor(s) in communication with the sensing device(s). The system is configured to: (i) analyze the signal(s); (ii) detect the size of the cervix; (iii) determine parameters defining properties of the cervix; (iv) determine and distinguish normal tissue from abnormal tissue within the cervix; (v) determine the location of area(s) of abnormal tissue in the cervix; and (vi) generate a panoramic view of the cervix.

Abstract: An imaging lens assembly includes, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The seventh lens element has an image-side surface being concave in a paraxial region thereof. The image-side surface of the seventh lens element has at least one convex shape in an off-axis region thereof. An object-side surface and the image-side surface of the seventh lens element are aspheric. At least one of an image-side surface of the fourth lens element and an image-side surface of the fifth lens element has at least one inflection point.

Abstract: A light emitting device includes an LED having a (e.g., top) light output surface, a ceramic phosphor, and an adhesive layer positioned to attach the top of the LED to the ceramic phosphor. In one embodiment the adhesive layer is composed of multiple separate patches (regions) that define at least one channel therebetween, with the channel being open to an environment to permit oxygen permeation. The adhesive layer can be applied by a patternable dispensing system.

Abstract: A lens system forms an image on an imaging element having a quadrilateral shape disposed on an optical axis. The lens system includes a second free-curved lens being asymmetrical with respect to the optical axis. A sag amount of the second free-curved lens in a circle separated from the optical axis by a length having a predetermined ratio with respect to a minimum image height has extrema outside of a first intersection points between a first surface passing through the optical axis and parallel to longer sides of the imaging element and the circle, and a second intersection point between a second surface passing through the optical axis and parallel to shorter sides of the imaging element and the circle. Each of the extrema is greater than the sag amount at the first intersection point or the second intersection point by 0.01 mm or greater.

Abstract: Disclosed is a method for manufacturing an electro-active polymer layer structure including an elastomer layer and at least one electrode layer that is arranged on a first surface of the dielectric elastomer layer, the method including: applying a layer of conductive material on the first surface of the elastomer layer. The layer of conductive material consists of agglomerated graphene based nanoplatelets, having a flattened shape between two main surfaces parallel to the graphene molecular lattice plane. The method further includes: obtaining a texture of the nanoplatelets in the applied layer by orienting the nanoplatelets on the first surface of the elastomer layer with the main surfaces of the nanoplatelets being parallel with the first surface of the elastomer layer, such that the graphene molecular lattice plane of the nanoplatelets is parallel to the first surface of the elastomer layer.

Abstract: The disclosure concerns a method for manufacturing a device for forming at least one focused beam in a near zone, from an electromagnetic wave incident on said device. The method includes depositing a dielectric material layer with a first refractive index on a substrate layer, creating at least one cavity by a microfabrication technique in the dielectric material layer, the device for forming at least one focused beam in a near zone of the substrate layer (110) and the dielectric material layer, filling the at least one cavity with a material having a second refractive index lower than the first refractive index, determining a deviation between a measured focused beam radiation angle obtained from the device for forming at least one focused beam in a near zone and an expected focused beam radiation angle and modifying locally at least one of the two refractive indexes according to the deviation.

Abstract: The present embodiment relates to a lens driving device comprising: a first housing; a second housing disposed at an inner side of the first housing; a bobbin disposed a an inner side of the second housing; a first coil disposed on the bobbin; a magnet disposed on the second housing, and facing the first coil; a second coil facing the magnet; a first support member coupled to the bobbin and the second housing; and a second support member coupled to the first housing and the second housing, wherein the second coil is disposed to be spaced apart from the first housing.

Abstract: There is provided a lens piece and a lens assembly as well as an imaging device including the same. The lens assembly includes the lens piece and a lens barrel. The lens piece has a wing extending transversely from a lens sidewall. The lens barrel carries the lens piece, and includes a reservoir corresponding to the wing of the lens piece for containing adhesive.

Abstract: Provided are a miniature endoscopic probe and a multi-photon endoscopy including the same.

Abstract: In order to achieve a relatively small installation height of a multi-aperture imaging device having a one-line array of adjacently arranged optical channels, lenses of the optics of the optical channels are attached to a main side of a substrate by one or more lens holders and are mechanically connected via the substrate, the substrate being positioned such that the optical paths of the plurality of optical channels pass therethrough.

Abstract: An optical shield for a photovoltaic cell is provided, comprising an at least one carrier element, the carrier element comprises a number of embedded optically functional cavities arranged into an at least one predetermined optical relief pattern, wherein each embedded optically functional cavity in the at least one carrier element is positioned and aligned over an individual surface structure, such as an electrode, a contact, a finger, or a busbar, provided on the surface of the photovoltaic cell.

Abstract: A laser processing apparatus includes a light source configured to generate a laser beam, and a light converging optical system configured to converge laser beam to a focal point at an object to be processed, the light converging optical system including a through-hole optical element and a composite optical element under the through-hole optical element, wherein the through-hole optical element includes a first recess portion configured as a concave mirror at a lower surface of the through-hole optical element, and wherein an upper surface of the composite optical element is convex and includes a first region configured to reflect the laser beam and a second region configured to transmit the laser beam.

Abstract: An optical lens assembly includes at least one dual molded lens element. The dual molded lens element has a central axis, and includes a light transmitting portion and a light absorbing portion. The light transmitting portion includes an optical effective region and a lens peripheral region, and the lens peripheral region surrounds the optical effective region. A light absorbing portion surrounds the optical effective region. The light transmitting portion and the light absorbing portion are made of different plastic materials with different colors, and the light absorbing portion includes at least three gate portions surrounding the central axis, wherein all gate portions are located on the same surface of the dual molded lens element. The light transmitting portion and the light absorbing portion of the dual molded lens element are integrally formed by the injection molding.

Abstract: A resin composition includes a vinyl-containing polyphenylene ether resin and a prepolymer, wherein the prepolymer is prepared by prepolymerization of a mixture which at least includes a divinylbenzene, a triallyl compound and a diallyl isophthalate. An article made from the resin composition is also provided, which includes a prepreg, a resin film, a laminate or a printed circuit board. The article achieves improvements in at least one properties of glass transition temperature, copper foil peeling strength, dissipation factor, inner resin flow, melt viscosity, minimum dynamic viscosity, resin filling property in open area, and water resistance.

Abstract: An optical lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element and a third lens element. The first lens element with positive refractive power has an object-side surface being convex, and the object-side surface and an image-side surface thereof are aspheric. The second lens element with negative refractive power has an image-side surface being concave, and an object-side surface and the image-side surface thereof are aspheric. The third lens element with refractive power has an object-side surface being concave, and the object-side surface and an image-side surface thereof are aspheric. The optical lens assembly further includes a stop with no lens element having refractive power disposed between the stop and the first lens element. The optical lens assembly has a total of three lens elements with refractive power.

Abstract: Provided is an antireflective film-attached transparent substrate, including a transparent substrate having first and second principal surfaces and an antireflective film formed on the first principal surface of the transparent substrate, in which the antireflective film has a luminous reflectance being 1% or lower, and the antireflective film-attached transparent substrate has a transmittance being 85% or higher over the whole wavelength range of from 700 nm to 950 nm and has a reflectance being maximum in a wavelength range of from 750 nm to 900 nm in a reflection spectrum of a wavelength range of from 450 nm to 950 nm.

Abstract: A vehicle lamp assembly includes a housing that defines an opening. A light source is operably coupled with the housing. The light source is configured to emit light. A lens is coupled to the housing proximate the opening. The lens includes a first side that has an A-surface of the lens. A second side has a B-surface of the lens. A first optic defines an interior surface of the first side of the lens. The A-surface is free of the first optic. A second optic is defined on the second side. The first optic and the second optic are aligned to collimate and disperse the light.

Abstract: The present disclosure concerns a device for forming a field intensity distribution in the near zone, from a propagating electromagnetic waves which are incident on said device. The device comprises: at least one layer of dielectric material, having a first refractive index n1 with a surface having at least one abrupt change of level forming a step; an element having a second refractive index n2 lower than said first refractive index n1, which is in contact with said step; and wherein said step generates a beam which is tilted compared to a propagation direction of said electromagnetic waves, and said beam having a length comprised between ½?_1 to 10?_1, with ?_1 being a wavelength of said electromagnetic waves in said dielectric material.

Abstract: A camera module, which is mounted on an inside of a front windshield of a vehicle and to image an external environment of the vehicle, includes a lens unit and an imager to image the external environment by forming an optical image, which is from the external environment through the lens unit.

Abstract: Disclosed herein are embodiments of a porous aluminum oxide thin film having a surface RMS roughness value of less than 1 nm. The thin film may also comprise phosphorus. The disclosed thin films may have a refractive index of from 1 to 2, such as from 1 to 1.5. Also disclosed are embodiments of as method for making the disclosed thin films, comprising forming an aqueous solution of the alumina precursor, a surfactant and optionally a phosphorus-containing precursor, and depositing the solution on a substrate.

Abstract: A method of aligning an optical component in a laser system using diffraction patterns of alignment references includes: placing a first alignment reference in the path of a laser beam upstream of an optical component, the first alignment reference having first reference features forming a first diffraction pattern when illuminated by the laser beam; placing a second alignment reference in the path of the laser beam downstream of the first alignment reference and the optical component, the second alignment reference having second reference features forming a second diffraction pattern when illuminated by the laser beam; illuminating the alignment references and optical component with the laser beam; monitoring the combined diffraction pattern of the reference features of the alignment references downstream of the second alignment reference; and adjusting the relative position and/or orientation of the optical component towards the combined diffraction pattern indicating alignment of the optical component to t

Abstract: The present disclosure is generally directed to a lens clip that includes an optical lens slot to securely hold an optical lens at a predetermined position to mitigate effects of post-annealing shift. The lens clip includes a base that provides at least one substrate mating surface for mounting to a substrate, and at least first and second arms extending from the base. The first and second arms extend substantially parallel relative to each other and define at least a portion of an optical lens slot. The optical lens slot is configured to receive at least a portion of an optical lens and securely hold the optical lens at a predetermined position to ensure optical alignment of the optical lens, e.g., relative to an associated laser diode or other optical component, during fixation of the optical lens to the substrate using, for instance, UV-curing optical adhesives.

Abstract: A meta-optical device and a method of manufacturing the same are provided. The method includes depositing a group III-V compound semiconductor on a substrate, forming an anti-oxidation layer, performing crystallization by using post annealing, removing the anti-oxidation layer, and manufacturing a meta-optical device by using patterning.

Abstract: A method for moulding an optical component by a mould, at least one moulding station, and at least one cooling station including a cooling space, the method including: a step of moulding a moulded component in a moulding station, a step of transferring this component from this moulding station into the cooling space, keeping the moulded component facing at least one of the mould parts, a step of cooling the moulded component by sending a cooling fluid between the moulded component and the walls of the cooling space, the moulded component being kept some distance from these walls.

Abstract: An object of the present invention is to develop a compound and a curable composition which are capable of providing an optical member having favorable refractive index characteristics and a high degree of moisture-heat resistance. The present invention relates to a compound represented by General Formula (1), a curable composition containing the compound, a semi-cured product, a cured product, an optical member, and a lens. At least one of R1, . . . , or R5 represents an aryl group or a heteroaryl group which is substituted by a substituent containing a (meth)acryloyloxy group, and at least one of R6, . . . , or R10 represents an aryl group or a heteroaryl group.

Abstract: A diffractive optical element (DOE) is designed to implement both a collimation function with respect to an input divergent beam and a beam shaping function with respect to an output divergent beam. The phase designs of the collimation function and the beam shaping function are independently produced in the phase domain. These phase designs are then combined using a phase angle addition of the individual functions and wrapped between 0 and 2? radians. The diffractive surface of the DOE is then defined from the wrapped phase angle addition of the individual functions.

Abstract: An interchangeable lens in which a tilt of an optical axis of a shooting optical system and a projection lens system can be easily adjusted. An interchangeable lens comprising a lens barrel portion holding a lens group; a lens mount detachably coupled to a camera main body; and a spacer sandwiched between the lens barrel portion and the lens mount. The spacer has, in a circumferential direction of the interchangeable lens, first seat surfaces protruding in the optical axis direction at one surface thereof, and has, in the circumferential direction, second seat surfaces protruding in the optical axis direction at the other surface thereof. One seat surfaces of the first seat surfaces and the second seat surfaces are disposed with different heights such that a surface defined by the second seat surfaces has an angle with respect to a surface defined by the first seat surfaces.

Abstract: The present invention provides a projector including a light-emitting device, a diffraction optical element (DOE) and a switchable diffuser. The light-emitting device is arranged for generating a laser beam. The switchable diffuser is controlled by a control signal to diffuse or scatter received lights or not diffuse or scatter the received lights, wherein the laser beam passes through the DOE and the switchable diffuser to generate an output image of the projector.

Abstract: An optical image lens assembly includes a plurality of optical lens elements, wherein the optical lens elements include a plurality of plastic optical lens elements having refractive power and aspheric surfaces. Wherein at least one long-wavelength red light absorbing optical lens element made of a plastic material and having refractive powers is disposed within the optical image lens assembly, and the long-wavelength red light absorbing optical lens element can be penetrated by a visible light and can filter a long-wavelength red light.

Abstract: The present disclosure relates to optical systems and methods for their manufacture. An example method includes coupling a first surface of a light-emitter substrate to a reference surface of a carrier substrate. The method also includes registering a mold structure with respect to the reference surface of the carrier substrate. Furthermore, the method includes using the mold structure to form an optical material over at least a portion of the light-emitter substrate. The optical material is shaped according to a shape of the mold structure and includes at least one registration feature. The method also includes coupling an optical lens element to the optical material such that the optical lens element is registered to the at least one registration feature.

Abstract: According to one embodiment, an optical element, including a first liquid crystal lens formed of liquid crystal molecules, a polarizer opposed to the first liquid crystal lens, a first modulating portion located between the first liquid crystal lens and the polarizer to modulate incident light and a first unmodulating portion located between the first liquid crystal lens and the polarizer and adjacent to the first modulating portion.

Abstract: A lens includes an optical portion refracting light, a rib extending along a circumference of at least a portion of the optical portion, a first area and a second area of an object-side surface of the rib, wherein the first area has a first surface roughness and the second area has a second surface roughness less rough than the first surface roughness, and a third area and a fourth area of an image-side surface of the rib, wherein the third area has a third surface roughness and the fourth area has a fourth surface roughness less rough than the third surface roughness, wherein the second area includes inclined surfaces.

Abstract: An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially arranged on an optical axis from an object side to an image side, wherein an image-side surface of the first lens and an image-side surface of the sixth lens may be concave, and 0.7<TL/f<1.0 and |Nd2?Nd3|<0.2 in which TL may be a distance from an object-side surface of the first lens to an imaging plane, f may be an overall focal length of the optical imaging system, Nd2 may be a refractive index of the second lens, and Nd3 may be a refractive index of the third lens.

Abstract: An interchangeable lens in which a tilt of an optical axis of a shooting optical system and a projection lens system can be easily adjusted. An interchangeable lens comprising a lens barrel portion holding a lens group; a lens mount detachably coupled to a camera main body; and a spacer sandwiched between the lens barrel portion and the lens mount. The spacer has, in a circumferential direction of the interchangeable lens, first seat surfaces protruding in the optical axis direction at one surface thereof, and has, in the circumferential direction, second seat surfaces protruding in the optical axis direction at the other surface thereof. One seat surfaces of the first seat surfaces and the second seat surfaces are disposed with different heights such that a surface defined by the second seat surfaces has an angle with respect to a surface defined by the first seat surfaces.

Abstract: This disclosure provides systems, methods, and devices related to a metasurface skin cloak. In one aspect, a metasurface skin cloak includes a dielectric layer and a plurality of blocks disposed on the dielectric layer. The dielectric layer is disposed over a surface including a feature on the surface. Each block of the plurality of blocks has a shape that is symmetric about two perpendicular axes. The metasurface skin can render the feature on the surface not optically detectable.

Abstract: A light source package includes a substrate, a light emitting device disposed on the substrate, a lens disposed on the light emitting device, a housing disposed on the substrate, and a conductive member disposed in the housing. The lens is spaced apart from the light emitting device, the housing is disposed on a side surface and a portion of a top surface of the lens, and the conductive member is electrically connected to the light emitting device.