Abstract: A beam expanding structure and an optical display module are disclosed. The beam expanding structure includes a plurality of transparent substrates in a stacked arrangement. Each transparent substrate includes a first reflective area and a second transflective. In each transparent substrate, the first area is to reflect a light beam incident thereon to the second area of one or more transparent substrate at downstream; the second area is to transmit part of a light beam received from one or more transparent substrate at upstream to an observation point, while reflecting rest of the light beam received from the one or more transparent substrate at upstream back to one or more transparent substrate at upstream; and the second area is further to at least partially reflect a light beam received from one or more transparent substrate at downstream back to one or more transparent substrate at downstream.

Abstract: [Problem to be Solved] Conventional devices for reproduction of holograms for appreciative viewing do not have any functionality to gate access to special content by exploiting the characteristics of the hologram. Further, a system that allows users to easily perform judgment of authenticity has been much awaited as, with holograms, although a counterfeit prevention effect can be expected visually, counterfeit imitations of the holograms themselves are already in circulation. [Means to Resolve the Problem] It is made possible to read holographic barcodes with such portable information consoles as smartphones to perform judgment of authenticity. In this process, by controlling from the portable information console side the light sources illuminating the hologram, it is possible to add a strong authenticity judgment function without a major increase in cost and also without building any special infrastructure.

Abstract: A microscopy system which includes a light source for illuminating a sample; an objective lens for capturing light emitted from the illuminated sample to form a signal beam; and a dispersive optical element through which the signal beam is directed, wherein the dispersive optical element converts the signal beam to a spatially coherent signal beam.

Abstract: Provided is a holographic display apparatus including a motor configured to synchronize with a hologram transmitted based on user's point of view and to rotate; a spatial light modulator configured to load hologram data generated based on the user's point of view in a fixed position state and to perform a light modulation; a mirror configured to provide the hologram which is light-modulated by the spatial light modulator according to the user's point of view during the rotation by rotation operation of the motor; and a hologram correction unit configured to compensate a rotation error between the fixed spatial light modulator and the rotating mirror and to provide a corrected hologram data to the spatial light modulator.

Abstract: A head-up display for a windscreen having spatially variant optical power. The head-up display includes a diffuser arranged to display an image. The diffuser is shaped to compensate for the spatially variant optical power of the windscreen. A holographic projector may be provided, which is arranged to project the image for display onto the diffuser and includes a spatial light modulator arranged to apply a phase-delay distribution to incident light. The phase-delay distribution includes phase-only data representative of an object. The projector further includes Fourier transform means arranged to perform a Fourier transform of phase modulated light received from the spatial light modulator and to form the image on the diffuser.

Abstract: A head-up display device for displaying a virtual image superimposed over a field of view to a viewer is provided. The head-up display device includes a picture generating unit having an illumination source, such as a laser, to generate a real image following a first light beam. A windshield of a vehicle engages the first light beam, either at an inclined angle or perpendicular, to reflect the first light beam away from the viewer as reflected images. A combiner disposed on the windshield including a holographic optical element steers the first light beam toward the viewer as a third light beam to present the virtual image within the field of view of the viewer. Mirrors may direct and magnify first light beam onto the combiner. A method for displaying a virtual image superimposed over a field of view to a viewer using a head-up display device is also provided.

Abstract: A system, method and computer program products for prioritizing the stacking order of virtualized objects within a z-index of an augmented reality system by presenting the most valuable, relevant or important information more prominently. Prioritization of the virtualized object may occur dynamically, as a function of the user's primary focus. As the user's primary focus changes from one physical object to another, the stacking order may change in response to the shift in focus. Embodiments may use one or more techniques to identify the primary focus such as the direction of the user's gaze, the focal point of one or more visual recording systems (i.e. cameras) or the user may manually highlight one or more objects via the HUD or interface of the augmented display system. The disclosed embodiments allow for the more predominate or relevant virtualized objects within the augmented display to receive priority, unobscured viewing by the user.

Abstract: An input-coupler of an optical waveguide includes one or more Bragg polarization gratings for coupling light corresponding to the image in two different directions into the optical waveguide. The input-coupler splits the FOV of the image coupled into the optical waveguide into first and second portions by diffracting a portion of the light corresponding to the image in a first direction toward a first intermediate component, and diffracting a portion of the light corresponding to the image in a second direction toward a second intermediate component. An output-coupler of the waveguide combines the light corresponding to the first and second portions of the FOV, and couples the light corresponding to the combined first and second portions of the FOV out of the optical waveguide so that the light corresponding to the image and the combined first and second portions of the FOV is output from the optical waveguide.

Abstract: An artificial-reality display uses an anisotropic material to circularly-polarize light exiting a waveguide so that the artificial-reality display is relatively transparent.

Abstract: A head worn imaging system includes a light source configured to generate a light beam. The system also includes a light guiding optical element having a thickness between 0.1 and 1.5 mm and configured to propagate at least a portion of the light beam by total internal reflection. The system further includes an entry portion and an exit portion of the light guiding optical element configured to selectively allow light addressing the exit portion to exit the light guiding optical element based on the angle of incidence of the light, the radius of curvature of the light and/or the wavelength of the light.

Abstract: A substrate-guided holographic diffuser has a light-guide section configured to in-couple light and transmit the light within itself via total internal reflection. It can also have a brightness enhancement section that recycles non-diffracted light within the light-guide section. A hologram section that receives light from the light-guide section has a holographic structure defining acceptance conditions and is positioned relative to the internally reflected light such that the internally reflected light meets the acceptance conditions of the holographic structure. The internally reflected light is out-coupled by the holographic structure as a projected image of light scattered from a diffuser.

Abstract: Method for computing the code for the reconstruction of three-dimensional scenes which include objects which partly absorb light or sound. The method can be implemented in a computing unit. In order to reconstruct a three-dimensional scene as realistic as possible, the diffraction patterns are computed separately at their point of origin considering the instances of absorption in the scene. The method can be used for the representation of three-dimensional scenes in a holographic display or volumetric display. Further, it can be carried out to achieve a reconstruction of sound fields in an array of sound sources.

Abstract: Provided are a backlight unit and a holographic display including the same. The backlight unit may include: a light guide plate; a light source unit configured to adjust a direction of light which is emitted from the light source unit and incident on the light guide plate; and a diffraction device which is disposed on the light guide plate and configured to control a direction of light emitted from the light guide plate.

Abstract: The present invention is related to laser technology which enables efficient, passive, coherent beam combination from distributed gain sources. The present invention includes a novel architecture which coherently combines the power from multiple sources, and which adds considerable flexibility to laser gain materials for many applications. The novel architecture of the present invention combines two techniques: 1) beam splitting and combination; and 2) phase-locking (i.e., maintaining a common phase relationship between multiple beams), using reflective gratings. Thus, the present invention addresses important limitations in laser technology: efficiency, power scaling and wavelength selectivity.

Abstract: A near-eye display includes a light source assembly, a first waveguide, an output waveguide, and a controller. The light source assembly emits image light including light within a first band and a second band. The first waveguide receives the image light, expands the received image light in at least one dimension, and outputs an image light. The output waveguide includes an output area and a plurality of input areas. Each input area receives the image light from the first waveguide. The output waveguide includes a holographic Bragg grating and the output waveguide expands the image light at least along two dimensions to form an expanded image light, and outputs the expanded image light toward an eyebox. The controller controls the scanning of the light source assembly and the first waveguide.

Abstract: A vehicle analysis platform may cause one or more image capture devices to capture a plurality of images. The vehicle analysis platform may cause one or more sensors to provide measurement data associated with one or more operational characteristics of a vehicle. The vehicle analysis platform may determine, based on the plurality of images, one or more features of the vehicle and obtain, based on the one or more features, reference information associated with the vehicle. The vehicle analysis platform may analyze the vehicle based on the plurality of images and the reference information to determine an image score associated with the vehicle. The vehicle analysis platform may analyze the vehicle based on the measurement data and the reference information to determine an operational score associated with the vehicle. The vehicle analysis platform perform an action associated with the vehicle based on the image score and the operational score.

Abstract: A photoelectric conversion element includes a first photoelectric conversion unit configured to generate an electron serving as a signal charge, a second photoelectric conversion unit configured to generate a hole serving as a signal charge, a first floating diffusion region to which the electron generated in the first photoelectric conversion unit is transferred, a second floating diffusion region to which the hole generated in the second photoelectric conversion unit is transferred, an amplifying transistor including a gate electrically connected to the first floating diffusion region and the second floating diffusion region, a first charge ejection unit configured to eject the electron generated in the first photoelectric conversion unit, and a second charge ejection unit configured to eject the hole generated in the second photoelectric conversion unit, wherein the first photoelectric conversion unit and the second photoelectric conversion unit are arranged along a principal surface of a semiconductor sub

Abstract: Heat de-bondable adhesive articles include a heat-shrinkable optical substrate with optically clear adhesive disposed on the two major surfaces of the heat-shrinkable substrate. Optical articles can be prepared by disposing the heat de-bondable adhesive articles between two optical substrates. Other optical articles can be prepared by disposing an optically clear adhesive layer and a heat-shrinkable optical substrate on an optical substrate.

Abstract: A 2D hologram system with a matrix addressing scheme is provided. The system may include a 2D array of sub-wavelength hologram elements integrated with a refractive index tunable core material on a wafer substrate. The system may also include a matrix addressing scheme coupled to the 2D array of sub-wavelength hologram elements and configured to independently control each of the sub-wavelength hologram elements by applying a voltage.

Abstract: An apparatus includes beam shearing optics situated to receive a collimated beam and to shear the collimated beam along a first direction so as to form a plurality of adjacent collimated beam portions, and homogenization optics situated to receive and homogenize the adjacent collimated beam portions along at least the first direction so as to produce a homogenized output beam. A method includes shearing a collimated beam having a beam parameter product (bpp) along an axis so as to form a plurality of sheared collimated beam portions, and arranging the sheared collimated beam portions adjacent to each other so that a line beam having a length and thickness that is formed with the light from the sheared collimated beam portions has a lower bpp associated with the line beam thickness than the bpp of the collimated beam along the axis.

Abstract: An example method for constructing a three-dimensional object in accordance with aspects of the present disclosure includes projecting an image of a section of a three-dimensional object on a building plane through a projection unit, forming a cured section by irradiating laterally an interface of a photopolymerizable material on the building plane with light corresponding to the image of the section of the three-dimensional object, moving a support plane laterally to detach the cured section from the building plane resulting in a gap between the cured section and the building plane, and filling the gap between the cured section and the building plane with photopolymerizable material.

Abstract: Disclosed is an electronic device. The electronic device comprises: a display for displaying virtual reality (VR) content; a detection unit for detecting a distance between the electronic device and at least one from among a user and a terminal device held by the user; and a processor for determining a virtual field of view corresponding to the distance detected by the detection unit, and controlling the display to display a screen including a VR content area corresponding to the virtual field of view.

Abstract: A fly-cutting system is disclosed, and in particular one that comprises a dynamically-controllable actuator for controlling the position, orientation, or both position and orientation of a cutting element carried by a fly-cutting head. In certain embodiments, the actuator can adjust the position or orientation of a cutting element, or both, hundreds or thousands of times per second, enabling precise control over the shape of features formed by the cutting element in a surface of a workpiece.

Abstract: An optical system for shaping a wavefront of an electric field of an input light beam to be projected into a target volume including a first optical element, a spatial light modulator used to control light distribution in at least one transverse plane in the target volume. An intermediate optical element located on an optical axis, after the first optical element on a trajectory of the light beam for modulating the phase or the amplitude of the electric field of the input light beam is included. A second optical element for modulating the phase or the amplitude of the electric field of the input light beam is used to control the axial position of the transverse plane in the target volume. The second optical element is situated on the optical axis after the at least one intermediate optical element on the trajectory of the light beam.

Abstract: Embodiments for interaction with holographic image notifications by a processor. A notification to a user is displayed on an electronic device as a holographic image along a secondary field of view (FOV).

Abstract: A diffraction grating comprise a substrate and a plurality of connected diffraction structures formed on the substrate. Each diffraction structure is in the shape of a column and arranged along a concave cylindrical surface, and an axis of each diffraction structure extends along a generatrix of the concave cylindrical surface. A section contour is obtained by a cross section of the diffraction structures. The cross section is perpendicular to each axis of the diffraction structure. The section contour shows the connecting line of apexes of the diffraction structures as a reference curve having a plurality of first inflection points, wherein the diffraction structures are configured for separating the optical signal into a plurality of spectral components and focusing the spectral components onto a focal surface.

Abstract: Disclosed is an electronic device. The electronic device comprises: a display for displaying virtual reality (VR) content; a detection unit for detecting a distance between the electronic device and at least one from among a user and a terminal device held by the user; and a processor for determining a virtual field of view corresponding to the distance detected by the detection unit, and controlling the display to display a screen including a VR content area corresponding to the virtual field of view.

Abstract: An optical see-through display element and a display device using such an element. The element having a transparent substrate including two opposite faces, an in-coupling structure for coupling light into the substrate, and a diffractive out-coupling grating structure arranged on the transparent substrate for displaying the in-coupled light on the transparent substrate. The diffractive out-coupling structure includes at least two multi-layer gratings superimposed on top of each other on at least one of said opposite faces of the substrate. In particular, multilayer gratings reducing diffraction of transmissive light can be used. The element and device help to increase the out-coupling efficiency of diffractive displays and provides also technology to simultaneously maintain high image quality and transparency.

Abstract: A holographic weapon sight has a housing with a viewing end and an opposing target end, a viewing path being defined from the viewing end to the target end. A light source energized by a power source projects a light beam along a path onto a liquid crystal cell module. A power controller in communication with the power source is operable to adjust the brightness of the light beam from the light source. The liquid crystal cell module is operable to rotate and polarize the light beam to further adjust the brightness of the light beam. The light beam from the liquid crystal cell module illuminates a holographic optical element (HOE) that reconstructs an image of a reticle.

Abstract: This disclosure describes optical systems for projecting an irregular or complex pattern onto a region of space (e.g., a two-dimensional or three-dimensional object or scene). A respective light beam is emitted from each of a plurality of light sources. The emitted light beams collectively are diffracted in accordance with a plurality of different first grating parameters to produce a plurality of first diffracted light beams. The first diffracted light beams then collectively are diffracted in accordance with one or more second grating parameters.

Abstract: The subject matter discloses an electronic device, comprising a frame comprising one or more projecting units, the one or more projecting units are arranged in a manner to project the content on a projecting field, said projecting field is defined by the frame.

Abstract: A lighting and/or signalling device includes a container body having containment seats housing at least one light source for emitting light. A lenticular body closes the containment seats and is suitable to receive the beam of light and propagate it. A first lighting portion diffuses light of a predefined color, delimited by a first optic filter, having a first color different from the predefined color. Each light source is inside the containment seat and receives the beam of light, propagates it along a light guide body and emits it across the lenticular body. A second optic filter has a second color. The light produced by each light source and filtered by the second and by the first optic filter comes out of the lenticular body having the predefined color. The first optic filters are the same color so as to prove substantially indistinguishable when the respective light sources are deactivated.

Abstract: In various embodiments, a beam-parameter adjustment system and focusing system alters a spatial power distribution of a radiation beams before the beam is coupled into an optical fiber or delivered to a workpiece.

Abstract: A hybrid holographic sight generates a reticle or other image for aiming a weapon or an optical device. The hybrid holographic sight includes a light source operable to project a light beam along a path and a holographic optical element (HOE) disposed in the path of the light beam. The HOE reconstructs an image of a reticle and a non-diffraction element reflects the image of the reticle, whereby a user may view a reflection of the reconstructed reticle in the non-diffraction element (NDE).

Abstract: A holographic gun sight has a housing with a viewing end and an opposing target end, a viewing path being defined from the viewing end to the target end. A light source projects a light beam along a path to illuminate a reflection-type holographic optical element (HOE). The HOE reconstructs an object beam with an image of a reticle. The absolute difference between the incidence angle of the light beam on the HOE and the object beam angle is greater than zero and less than or equal to 30 degrees.

Abstract: A head up display can be used in compact environments. The head up display includes a combiner system including at least one light pipe and a waveguide. The at least one light pipe includes a turning grating or mirror array for providing light into the waveguide from the light pipe. An additional light pipe can also be provided. The combiner system can be headworn or stand-alone and can provide dual axis pupil expansion.

Abstract: Stereoscopic display systems and methods for displaying surgical data and information in a surgical microscope are disclosed herein. According to an aspect, a system includes first and second eyepieces. The system includes a display having first and second display portions, configured to display first images in the first display portion, and configured to display second images in the second display portion. The first image and the second image are projected along a first pathway and a second pathway. The system includes a first optical element positioned to relay the first images into the first eyepiece. The system includes a second optical element positioned to relay the second images into the second eyepiece.

Abstract: A three-dimensional light modulator, of which the pixels are combined to form modulation elements. Each modulation element can be coded with a preset discrete value such that three-dimensionally arranged object points can be holographically reconstructed. The light modulator is characterized in that assigned to the pixels of the modulator are beam splitters or beam combiners which, for each modulation element, combine the light wave parts modulated by the pixels by means of refraction or diffraction on the output side to form a common light beam which exits the modulation element in a set propagation direction.

Abstract: A method is provided for generating a plurality of electrical signals from polychromatic optical signals extracted from a set of optical fibers, a polychromatic signal including a plurality of predetermined wavelengths. An electrical signal is generated by using predetermined wavelengths. The method includes: grouping the extracted optical signals together into a polychromatic optical signal beam; separating the polychromatic signal beam into a plurality of monochromatic optical signal beams; and converting the plurality of separated monochromatic optical signal beams into the plurality of electrical signals.

Abstract: A selective/single plane illumination microscopy (SPIM) arrangement having an illumination device (1) for generating a light sheet (3) illuminating a sample (2); and a detection device (5), comprising a detector (4), for detected light proceeding from the sample (2), is configured and refined in the interest of efficient and low-impact sample investigation with physically simple means in such a way that the detection device (5) comprises a device (6) for allocating different focal planes of the light sheet (3) to different regions (7) of the detector (4).

Abstract: An image display apparatus includes an image light generating unit that emits image light; a light guide plate in which the image light emitted from the image light generating unit is incident; an incident side diffraction optical element disposed in a light incident section of the light guide plate; and an emission side diffraction optical element disposed in a light emitting section of the light guide plate, wherein a grating pitch of the incident side diffraction optical element and the grating pitch of the emission side diffraction optical element are different in a state where the image light generating unit is not in operation.

Abstract: A head-mounted display may include a display system and an optical system in a housing. The display system may have a pixel array that produces light associated with images. The display system may also have a linear polarizer through which light from the pixel array passes and a quarter wave plate through which the light passes after passing through the quarter wave plate. The optical system may be a catadioptric optical system having one or more lens elements. The lens elements may include a plano-convex lens and a plano-concave lens. A partially reflective mirror may be formed on a convex surface of the plano-convex lens. A reflective polarizer may be formed on the planar surface of the plano-convex lens or the concave surface of the plano-concave lens. An additional quarter wave plate may be located between the reflective polarizer and the partially reflective mirror.

Abstract: In embodiments of an auto-stereoscopic augmented reality display, the display device is implemented with an imaging structure that includes a waveguide for see-through viewing of an environment. The waveguide also transmits light of a virtual image that is generated as a near-display object to appear at a distance in the environment. The imaging structure includes switchable diffractive elements that are integrated in the waveguide and configured in display zones. The switchable diffractive elements are switchable to independently activate the display zones effective to correct for an accurate stereopsis view of the virtual image that appears at the distance in the environment.

Abstract: An optical reflective device referred to as a skew mirror, having a reflective axis that need not be constrained to surface normal, is described. Examples of skew mirrors are configured to reflect light about substantially constant reflective axes across a relatively wide range of wavelengths. In some examples, a skew mirror has substantially constant reflective axes across a relatively wide range of angles of incidence. Exemplary methods for making and using skew mirrors are also disclosed. Skew mirrors include a grating structure, which in some examples comprises a hologram.

Abstract: Provided are a surface protection film which would stably display an image, and would stably attain a mirror state, and which would be stably operated without inhibiting display operability. Disclosed is a surface protection film including a resin film and a pressure-sensitive adhesive layer, in which the relative permittivity of the resin film is of 1.0 to 5.0, the reflectance is set to a value within the range of 20% to 80%, and the transmittance for light is of 20% to 80%.

Abstract: An optical reflective device referred to as a skew mirror, having a reflective axis that need not be constrained to surface normal, is described. Examples of skew mirrors are configured to reflect light about a constant reflective axis across a relatively wide range of wavelengths. In some examples, a skew mirror has a constant reflective axis across a relatively wide range of angles of incidence. Exemplary methods for making and using skew mirrors are also disclosed. Skew mirrors include a grating structure, which in some examples comprises a hologram.

Abstract: Systems, devices, and methods for combined angle- and wavelength multiplexing in holographic optical elements (“HOE”) are described. An angle- and wavelength-multiplexed HOE includes multiple angle-multiplexed sets of wavelength-multiplexed holograms. Each set of wavelength-multiplexed holograms includes at least two holograms that are each responsive to a different wavelength of light. Each angle-multiplexed set of wavelength-multiplexed holograms includes a respective set of wavelength-multiplexed holograms that are all responsive to light that is incident thereon with and angle of incidence that is within a particular range. An example application is described in which an angle- and wavelength-multiplexed HOE is used as a holographic combiner in a wearable heads-up display, where angle-multiplexing provides multiple spatially-separated exit pupils in the eyebox of the display and wavelength-multiplexing provides multiple colors to each respective exit pupil.

Abstract: A head-up display apparatus is provided with an image emission mechanism that emits image display light, and a combiner arranged in front of an eye (or eyes) of a pilot to introduce the image display light to the eye(s) of the pilot. The head-up display apparatus is equipped with a light guide including first and second plane arranged in parallel planes, an incidence plane including a first reflector and an emission plane including a second reflector disposed between the first and second planes. The light guide is configured to reflect image display light from the emission mechanism to the combiner.

Abstract: A HMD includes a display block. The display block combines light from a local area with image light to form an augmented scene. The display block also provides the augmented scene to an eyebox corresponding a location of a user's eye. The display block includes a waveguide display, a focusing assembly and a compensation assembly. The waveguide display emits the image light. The focusing assembly includes a focusing geometric phase lens and presents the augmented scene at a focal distance. The compensation assembly includes a compensation geometric phase lens that has an axis of orientation orthogonal to an axis of orientation of the focusing geometric phase lens. The compensation assembly compensates the optical power of the focusing assembly.

Abstract: An example optical module includes: an optical splitter configured to split a received incident optical signal into a first optical signal and a second optical signal; a wavelength filter sheet configured to receive the second optical signal to reflect a first part of the second optical signal to generate reflected light, and to transmit a second part of that to generate transmitted light; a first photo detector configured to convert the reflected light into an electric signal; a second photo detector configured to convert the transmitted light into an electric signal; and an MCU configured to obtain the first detected signal and the second detected signal, to determine the difference in optical power between the reflected light and the transmitted light, and to determine from the difference in optical power and a specified standard difference in optical power whether the wavelength of the second optical signal is shifted.