Abstract: A privacy display provides a private image exclusively visible within a viewing cone of a viewbox. The privacy display includes a light guide to guide light, a diffraction grating configured to diffractively couple out a portion of the guided light as diffractively coupled-out light and to direct the diffractively coupled-out light into the viewbox, and a light valve array configured to modulate the diffractively coupled-out light to provide the private image. An extent of the viewbox is determined by a collimation factor of the guided light. A dual-mode privacy display system further includes a broad-angle backlight configured to provide broad-angle light to separately provide a public image visible both inside and outside the viewing cone. The private image may be provided in a privacy mode and the public image may be provided in a public mode of the dual-mode privacy display system.

Abstract: In various embodiments, laser devices include a thermal bonding layer featuring an array of carbon nanotubes and at least one metallic thermal bonding material.

Abstract: There are provided an excellent diffractive optical element having a small amount of flare coloring and unaffected optical performance with a decrease in diffraction efficiency minimized and an optical system and an optical apparatus using the diffractive optical element. A diffractive optical element GD used in an optical system OL of a camera 1, which is an optical apparatus, and including a diffraction grating so that the diffractive optical element GD serves as a lens is so configured that the grating height h0 of the diffraction grating in a central region Ac around an optical axis Z is smaller than the grating height hmax of the diffraction grating in a peripheral region Ap.

Abstract: To provide a diffractive optical element having a high light utilization efficiency, whereby light spots having a predetermined pattern can be stably formed, a projection device and a measuring device.

Abstract: A waveguide comprises a first surface and a second surface. The first surface comprises a first plurality of grating structures. The waveguide is configured to guide an in-coupled light beam to undergo total internal reflection between the first surface and the second surface. The first grating structures are configured to disrupt the total internal reflection to cause at least a portion of the in-coupled light beam to couple out of the waveguide and project from the first surface, the portion of the in-coupled light beam coupled out of the waveguide forming out-coupled light beams, the out-coupled light beams being configured to form an array of dots on a surface where the out-coupled light beams are projected on.

Abstract: A device includes a plurality of imaging pixels in a spatial pattern with a formation of features disposed over the pixels. A first and a second feature of the formation of features are disposed over a first pixel. A first luminophore is disposed within or over the first feature. A second luminophore is disposed within or over the second feature. A structured illumination source is to direct at least a portion of first photons in an illumination pattern to the first feature at a first time, and to direct at least a portion of second photons in the illumination pattern to the second feature at a second time. The structured illumination source includes an illumination pattern generator having an illumination pattern generator actuator connected to the illumination pattern generator to cause the illumination pattern to translate or rotate relative to the formation of features.

Abstract: Systems integrating display resolution-multiplication solutions can be implemented in a variety of different ways. In many embodiments, the system includes an image projector for projecting image light, an image processor for computing a native image and at least one image shifted in a predefined direction, and at least one switchable grating capable of being switched between diffracting and non-diffracting states. In some embodiments, the switchable grating is optically coupled to the image projector. In a number of embodiments, the switchable gratings have a first configuration for propagating the native image light and at least one other configuration for propagating shifted image light having an angular displacement corresponding to the image shift in a predefined direction. By displaying the native and shifted images sequentially within a human eye integration period, the display resolution can be multiplied.

Abstract: An optical targeting device comprised of a support body, an imaging waveguide joined to and in a position relative to the support body, and a light source mounted on the support body. The imaging waveguide is comprised of an input diffractive optic, and an output diffractive optic. The light source is located to direct a targeting light beam to the input diffractive optic of the imaging waveguide. In operation of the optical targeting device, the imaging waveguide simultaneously transmits incoming light from a scene viewable by a user of the device through the light transmissive body, and propagates the targeting light beam from the input diffractive optic laterally through the light transmissive body and directs the targeting light beam outwardly from the output diffractive optic, thereby rendering the targeting light beam as a point of light superimposed within the scene viewable by the user.

Abstract: A system is provided. The system includes a waveguide configured to guide an image light to propagate inside the waveguide. The system also includes a plurality of diffractive components coupled to the waveguide and switchable between operating in a diffraction state to direct the image light from the waveguide to an eye-box of the system, and operating in a non-diffraction state to transmit a light from a real-world environment to the eye-box. The system further includes a controller coupled with the plurality of diffractive components and configured to switch each of the plurality of diffractive components between operating in the diffraction state during a virtual-world subframe of a display frame and operating in the non-diffraction state during a real-world subframe of the display frame.

Abstract: An optical device includes a refractive prism including a first surface facing an object, a second surface facing a first lens, and a third surface configured to reflect incident light to change a path of the incident light, one of the first surface, the second surface, or both the first and the second surface includes a pattern such that the refractive prism is a diffractive optical element; and a plurality of lenses including the first lens.

Abstract: Disclosed herein are metasurfaces formed on a substrate from a plurality of posts. The metasurfaces are configured to be optically active at one or more wavelengths and in certain embodiments are configured to form lenses having unexpectedly strong focusing power. In particular, the metasurfaces are formed from “low-contrast” materials, including CMOS-compatible materials such as silicon dioxide or silicon nitride. Accordingly, the disclosed metasurfaces are generally CMOS compatible and therefore embody a new paradigm in metasurface design and manufacturing.

Abstract: A method of fabricating an imaging system as well as to a corresponding imaging system. The method includes providing a substrate; and forming, by means of a 3D-printing technique, a 3D structure on the substrate, wherein the forming of the 3D structure includes forming a stack of at least two diffractive optical elements in a single printing step.

Abstract: A wearable display device is provided, including a first optical waveguide lens and a first projection assembly. The first optical waveguide lens has a first area and a second area. The first projection assembly disposed on the first optical waveguide lens projects a plurality of lights and includes a first light projector and a second light projector. The first and second light projectors are disposed in different positions on the first optical waveguide lens in the first direction, and the first light projector and the second light projector do not overlap in the second direction, wherein the first direction and the second direction are not parallel. The first light projector projects a first light to the first area, and the second light projector projects a second light to the second area, and the first light does not overlap with the second light in the second direction.

Abstract: A diffraction device includes a ZnS member and a ZnSe member coupled to the ZnS member, and a diffraction grating is provided on the ZnSe member.

Abstract: Provided is a lens apparatus attachable and removable to a camera apparatus, the lens apparatus comprising a communication device configured to transmit, to an external device, information for light amount compensation of image data obtained by image pickup in the camera apparatus, in which the information includes information of a coefficient A0 of a term of 0-th-order with respect to an image height in a polynomial of n-th-order with respect to the image height, and in which a conditional expression 0.7<A0(Z)×(Fw/F(Z))2<1.3 is satisfied where A0(Z) represents the coefficient A0 at a zoom state Z, F(Z) represents an effective F-number at the zoom state Z, and Fw represents an effective F-number at a wide angle end.

Abstract: An imaging lens system includes a plastic lens element, a lens barrel and a light-absorbing coating layer. The plastic lens element is accommodated in the lens barrel and has an outer annular surface. The lens barrel includes a plate portion and a lateral wall portion. An optical axis of the imaging lens system passes through a light-passable hole of the plate portion. The lateral wall portion is connected to the plate portion and extends along a direction substantially parallel to the optical axis. The light-absorbing coating layer has an inner surface and an outer surface. The inner surface faces and is fixed on the outer annular surface of the plastic lens element. The outer surface is located opposite to the inner surface and in physical contact with the lateral portion of the lens barrel.

Abstract: Examples of light projector systems and methods of use. A method can include providing an optical device having a first surface, a second surface normal to the first surface, and a third surface arranged at an angle to the second surface. The third surface can be reflective to light of a first state and transmissive to light of a second state. An input beam having the first state can be normally incident on the first surface. A transmissive diffractive optical element on the first surface can convert the input beam into at least a first diffracted beam directed toward the third surface, where it is reflected by the third surface in a direction substantially parallel to the first surface. The reflected first diffracted beam can be modulated with image information using a spatial light modulator to produce a modulated light beam having the second state.

Abstract: A display device according to the present disclosure includes an imaging light generating device configured to emit imaging light, a first diffraction element configured to diffract the imaging light emitted from the imaging light generating device, a second diffraction element configured to diffract the imaging light diffracted by the first diffraction element to form an exit pupil, and an optical filter disposed between the imaging light generating device and the exit pupil, and configured to attenuate a band on a short wavelength side of a peak wavelength of red light included in the imaging light emitted from the imaging light generating device.

Abstract: An optical device includes a light source assembly configured to generate an image light; and at least one waveguide including an in-coupling element and an out-coupling element configured to transmit, via the at least one waveguide, a plurality of light fields of the image light to an eye-box of the optical device, in a time-multiplexing manner. At least one of the in-coupling element or the out-coupling element includes at least one switchable diffractive optical grating, which includes a surface relief grating (SRG) filled with an optically anisotropic material having a first principal refractive index along a groove direction of the SRG and a second principal refractive index along an in-plane direction perpendicular to the groove direction. One of the first and second refractive principal refractive indices substantially matches a refractive index of the SRG, and the other mismatches.

Abstract: An optical multiplexer includes: an incident surface on which incident light beams having different wavelengths are to be incident; a reflection portion configured to reflect the incident light beams; and an emission surface configured to emit reflected light beams reflected by the reflection portion. The incident surface has adjacent condenser lenses corresponding to the respective incident light beams. The reflection portion has adjacent reflection surfaces configured to reflect the respective incident light beams which have been condensed. The adjacent reflection surfaces are respectively disposed so that angle ? formed by the respective reflected light beams reflected by the adjacent reflection surfaces is smaller than angle ? formed by the respective incident light beams which have been condensed. The emission surface has diffraction grating in which the respective reflected light beams reflected by the adjacent reflection surfaces are to be incident at a same position and diffracted in a same direction.

Abstract: A virtual image display apparatus includes an imaging light emitting unit configured to emit imaging light, and a light-guiding unit configured to guide the imaging light. The light-guiding unit is configured by arranging a first, a second, a third, and a fourth optical system in the stated order in a travel direction of the imaging light. The first optical system forms a first intermediate image of the imaging light. The second optical system includes a first diffraction element forming a pupil between the second and the fourth optical system. The third optical system forms a second intermediate image. The fourth optical system includes a second diffraction element forming an exit pupil by diffracting the imaging light. At the exit pupil, luminance of pixels at a central position of the imaging light and luminance of pixels at end positions of the imaging light differ.

Abstract: Provided is a hyperspectral sensor including a spectral angle converting unit configured to convert an angle of incident light differently according to a wavelength, a diffraction unit configured to selectively diffract the incident light according to an incident angle and a wavelength, a focusing optics including at least one lens, and configured to collect diffracted light passing through the diffraction unit, and an image sensor configured to acquire an image passing through the focusing optics and formed on a focal plane, wherein the diffraction unit includes a volume Bragg grating having a periodic refractive index distribution therein.

Abstract: A system and method for a head up display (HUD) can mitigate glare. The head up display can include a waveguide combiner including an input grating and an output grating and a glare mitigator disposed to prevent glare through the output grating from reaching an eye box. The glare mitigator can be a shade, a diffuser, a dimming element, or other device for mitigating glare. The glare mitigator can be an active or passive glare mitigator.

Abstract: Some embodiments relate to a vertical cavity surface emitting laser (VCSEL) device including a VCSEL structure overlying a substrate. The VCSEL structure includes a first reflector, a second reflector, and an optically active region disposed between the first and second reflectors. A first spacer laterally encloses the second reflector. The first spacer comprises a first plurality of protrusions disposed along a sidewall of the second reflector.

Abstract: A reflex site having a superluminescent micro-display, dynamic reticle, and metadata overlay is provided.

Abstract: Structures including a grating coupler and methods of forming a structure that includes a grating coupler. The grating coupler includes segments that are positioned with a spaced relationship on a slab layer. The segments contain an active material configured to have a first state with a first refractive index and a second state with a second refractive index in response to an applied stimulus. The first and second states may be produced by applying different sets of bias voltages to the segments as the applied stimulus.

Abstract: Embodiments of the present invention provide a computer system, a computer program product, and a method that comprises identifying a first user of a plurality of users; identifying a location for the first user; transmitting input of the first user to a server computing device; and simultaneously displaying multiple personalized, dynamic displays using diffraction grating based off of input of the first user and location of the first user.

Abstract: A device and a method, by means of which energy can be supplied to a retinal implant (12) via infrared radiation, are provided. To this end, infrared light is coupled in from an infrared light source (14), for example into a spectacle lens (13), and coupled out toward an eye (10) by way of an output coupling device (17) in order to illuminate the retinal implant (12).

Abstract: A surface-relief grating includes a base surface-relief grating comprising a plurality of ridges that include a first material, and a second material on only a top surface or a single sidewall of each ridge of the plurality of ridges, where the second material is different from the first material. A method of fabricating the surface-relief grating includes etching or molding a base surface-relief grating that includes a plurality of ridges, depositing a material layer on the plurality of ridges, and selectively etching the material layer to increase a height or a slant angle of an edge of a ridge in the plurality of ridges to make the surface-relief grating that includes the base surface-relief grating.

Abstract: A diffraction grating includes a substrate and an array of triangular ridges extending from the substrate. The ridges run parallel to one another and have triangular cross-sections such that first sides of the ridges face in a first direction and adjacent second sides of the ridges face in a second, different direction. An array of grating lines is disposed over the first sides of the array of ridges, each grating line of the array of grating lines comprising a slab of transparent material supported by the first side of a corresponding ridge of the array of ridges. A refractive index of the array of grating lines is different from a refractive index of the array of ridges.

Abstract: An integrated circuit includes a photodetector. The photodetector includes a circular optical grating formed in an annular trench in a semiconductor substrate. The circular optical grating includes dielectric fins and photosensitive fins positioned in the annular trench. The circular optical grating is configured to receive incident light and to direct the incident light around the annular trench through the dielectric fins and the photosensitive fins until the light is absorbed by one of the photosensitive fins.

Abstract: In some embodiments, compositions and methods comprising reflective flowable materials, e.g., reflective liquids including reflective inks and/or liquid metals, are described. In some embodiments, a surface is contacted with a reflective flowable material, thereby forming a reflective layer on the surface. In some embodiments, the surface is a surface of a waveguide, for example a waveguide for a display device, and the flowable material coats surfaces of protrusions on the surface to form reflective diffractive optical elements. Some embodiments include a display device comprising a reflective layer of reflective flowable material.

Abstract: A pupil replication waveguide for a projector display includes a slab of transparent material for propagating display light in the slab via total internal reflection. A diffraction grating is supported by the slab. The diffraction grating includes a plurality of tapered slanted fringes in a substrate for out-coupling the display light from the slab by diffraction into a blazed diffraction order. A greater portion of the display light is out-coupled into the blazed diffraction order, and a smaller portion of the display light is out-coupled into a non-blazed diffraction order. The tapered fringes result in the duty cycle of the diffraction grating varying along the thickness direction of the diffraction grating, to facilitate suppressing the portion of the display light out-coupled into the non-blazed diffraction order.

Abstract: Head mounted display device for very large field of view virtual reality experience, adapted to be mounted on a user's head, the head mounted display device including at least on image display, at least two eyepieces associated to each of the user's eyes and arranged between the image display(s) and the location of one of the user's eyes, each eyepiece having at least one Fresnel surface, wherein the at least one Fresnel surface of each eyepiece is planar and is arranged at an angle below 70°, preferably at an angle between 45° and 70°, in particular at an angle between 50° and 67.5° relative to the on-axis field gaze direction and where the surface optical center of the at least one Fresnel surface is decentered relative to the on-axis field gaze direction.

Abstract: Disclosed are a diffractive optical assembly, a laser projection unit, and a depth camera. The diffractive optical assembly includes a sealing assembly and a diffractive optical element. The sealing assembly includes a light transparent first sealing plate, a light transparent second sealing plate, and a spacer. The first sealing plate and the second sealing plate are arranged opposite to each other. The spacers spaces the first sealing plate and the second sealing plate apart. The first sealing plate, the second sealing plate and the spacer cooperatively defines a closed receiving cavity. The diffractive optical element is accommodated in the receiving cavity. The diffractive optical element includes a light transparent diffractive body and a diffractive structure formed on the diffractive body.

Abstract: The solar photovoltaic photoconverter unit (1) comprises a light processing opto-photonic platform (2) realized by at least one transparent substrate (8) is having on, at least one, of its faces a digital diffractive grating constituted by slanted ribs (11) that are modulated to harvest a maximum of solar light at any angle of incidence to split it into several spectral sub-bands, to guide and to concentrate individually every one of these spectral sub-band, toward a separate output of the opto-photonic platform (2) for allowing its exploitation by a light-to-electricity conversion unit (3) that will have by optimization a grate overall conversion efficiency. The opto-photonic platform (2) also includes photonic converters (13) and (14) converting ultraviolet light into visible light and also infrared light in visible light for a better exploitation of the energy present in the solar light and so increasing the light to electricity conversion.

Abstract: A method of forming an optical grating component. The method may include providing a substrate, the substrate comprising an underlayer and a hard mask layer, disposed on the underlayer. The method may include patterning the hard mask layer to define a grating field and etching the underlayer within the grating field to define a variable height of the underlayer along a first direction, the first direction being parallel to a plane of the substrate. The method may include forming an optical grating within the grating field using an angled ion etch, the optical grating comprising a plurality of angled structures, disposed at a non-zero angle of inclination with respect to a perpendicular to a plane of the substrate, wherein the plurality of angled structures define a variable depth along the first direction, based upon the variable height of the underlayer.

Abstract: Ion implantation is used to fabricate an optical device having a varying refractive index. The optical device can include a substrate with a material disposed on the substrate. A refractive index of the material is changed by ion implantation. The material can also be etched or imprinted. The optical device can be used in a virtual-reality system or augmented-reality system to provide angular selectivity from a display to a user's eye.

Abstract: A microscope objective lens includes, in order from an object side, a first lens group having positive refractive power, a second lens group having positive refractive power, and a third lens group having negative refractive power, and is configured such that the first lens group includes, on the most object side, a positive meniscus lens whose concave surface is directed to the object side, such that the second lens group includes a diffractive optical element having positive refractive power, and such that the diffractive optical element is arranged at a position closer to the image than a portion at which the diameter of a light flux passing through the first lens group and the second lens group is the larges.

Abstract: An image guide comprising glass or plastic planar substrate, a first hologram area, a second hologram area, and a third hologram area which are formed on the substrate as surface relief grating, period and direction of diffraction structure of the first, second, and third hologram areas have a relationship which is a sum of grating vectors of the first, second, and third hologram areas becomes zero, depth of diffraction structure on the first hologram area is a uniform in the own hologram area, and depth of diffraction structure on the second or third hologram area is chirped in the own hologram area increases luminance and uniformity of virtual image.

Abstract: An electronic device may have a light source such as a laser light source. The light source may emit light into a waveguide. A phase grating may diffract the light that is emitted into the waveguide to produce diffracted light. The diffracted light may be oriented parallel to a surface normal of an angled edge of the waveguide and parallel to a surface normal of a microelectromechanical systems mirror element in a two-dimensional scanning microelectromechanical systems mirror that is coupled to the edge of the waveguide. A wave plate may be interposed between the mirror and the edge of the waveguide to change the polarization state of light reflected from the mirror element relative to incoming diffracted light from the phase grating. The phase grating may be configured so that the reflected light is not diffracted by the phase grating.

Abstract: A method to provide compressive stress to substrates includes depositing a film on a ceramic substrate at a deposition temperature (Td) to form an article, the film having a difference relative to the ceramic substrate at Td in a coefficient thermal expansion (CTE) of at least 1.0×10?6/K and a difference in a refractive index >0.10. At least a portion of the thickness the film is converted in at least one of composition, phase and microstructure by lowering or raising the temperature from Td to reach a changed temperature (Tc) that is at least 100° C. different from Td. The film converting conditions result in the converted film portion providing a difference in refractive index at the Tc between the converted film and the ceramic substrate of ?|0.10|. The temperature of the article is then lowered to room temperature.

Abstract: An optical diffraction component is configured to suppress at least one target wavelength by destructive interference. The optical diffraction component includes at least three diffraction structure levels that are assignable to at least two diffraction structure groups. A first of the diffraction structure groups is configured to suppress a first target wavelength ?1. A second of the diffraction structure groups is configured to suppress a second target wavelength ?2, where (?1??2)2/(?1+?2)2<20%. A topography of the diffraction structure levels can be described as a superimposition of two binary diffraction structure groups. Boundary regions between adjacent surface sections of each of the binary diffraction structure groups have a linear course and are superimposed on one another at most along sections of the linear course.

Abstract: A contacted multilayer diffractive optical element having reduced wavelength dependency of diffraction efficiency, the contacted multilayer diffractive optical element facilitating processing in manufacture and being suitable for an infrared optical system, and an infrared optical system and an image pickup apparatus using the diffractive optical element. In order to achieve the above object, a contacted multilayer diffractive optical element comprises a first layer consisting of a first chalcogenide glass material and a second layer consisting of a second chalcogenide glass material, the first chalcogenide glass material and the second chalcogenide glass material satisfying a predetermined conditional expression and being in contact with and stacked on each other, and a diffraction grating structure in a surface of the contact therebetween, and an infrared optical system and an image pickup apparatus comprising the contacted multilayer diffractive optical element are provided.

Abstract: A thermal emitter including a substrate and a grating arranged atop the substrate, the grating includes a plurality of equidistant structures having a cross-section with a trapezoid shape. Material of the substrate and the grating converts incoming heat into radiation.

Abstract: Provided is a backlight unit including a light source emitting coherent light, a light guide plate propagating the light emitted by the light source, an input grating inputting the light from the light source into the light guide plate, an output grating provided on one surface of the light guide plate and diffracting light incident from inside the light guide plate and outputting the light, in a direction toward the outside of the light guide plate, a first recuperation element provided on one surface of the light guide plate and including a first recycle grating, and a second recuperation element provided opposite to the first recuperation element and directing, to the first recuperation element, incident light that is propagating inside the light guide plate.

Abstract: A light modulating device includes a dispersion assembly and a lens assembly, the dispersion assembly is configured to disperse light emitting from a light source into dispersed light which at least includes collimated monochromatic light and non-collimated monochromatic light; the lens assembly includes: at least a first lens component; at least a second lens component disposed in a one-to-one correspondence with the first lens component; a first absorbing layer disposed between the first lens component and the second lens component, the first absorbing layer has an opening, a focus point of the first lens component towards the first absorbing layer coincides with a focus point of the second lens component towards the first absorbing layer, the opening is disposed at the coincident focus point of the first lens component and the second lens component.

Abstract: Methods of producing gratings with trenches having variable height and width are provided. In one example, a method includes providing an optical grating layer atop a substrate, and providing a patterned hardmask over the optical grating layer. The method may include forming a mask over just a portion of the optical grating layer and the patterned hardmask, and etching a plurality of trenches into the optical grating layer to form an optical grating. After trench formation, at least one of the following grating characteristics varies between one or more trenches of the plurality of trenches: a trench depth and a trench width.

Abstract: Disclosed is a lens arrangement, in particular a spectacle lens arrangement, having a base lens element, wherein the base lens element has a first surface and wherein the first surface has a first optically effective region, wherein the first surface has an elongate recess and wherein the elongate recess extends adjacent to the first optically effective region and at least partly encompasses the first optically effective region. Moreover, methods for producing a lens arrangement are disclosed.

Abstract: A light projecting system comprises: a waveguide comprising a first surface, a second surface, and a fourth surface, at least one of the first surface or the second surface comprising a first plurality of grating structures; a light source coupling light into the waveguide to form an in-coupled light beam, wherein: each of the first grating structures is configured to disrupt the total internal reflection to cause at least a portion of the in-coupled light beam to couple out of the waveguide, and a remainder beam of the in-coupled light beam undergoing the total internal reflection being coupled out of the waveguide after the out-coupling at each of the first grating structures; a detector configured to receive and measure the remainder beam; and a processor coupled to the detector and configured to determine if a dangerous condition occurs based on the measured remainder beam.