Abstract: A wavelength selective polarization controller capable of controlling the polarization plane of optical wavelength multiplexing signals, for each wavelength component, and which does not generate time lag between each component is provided. This wavelength selective polarization controller has: a telecentric optical system to which optical wavelength multiplexing signals are incident; a polarization controller that controls the polarization plane of light output from the telecentric optical system; and an output optical system for outputting to an optical path output from the polarization controller. The telecentric optical system has: a first diffraction grating to which the optical wavelength multiplexing signals are incident; and a first condenser that condenses the optical wavelength multiplexing signals that have passed through the diffraction grating. The polarization controller has a plurality of phase modulators.

Abstract: A method and system for enhanced viewing of a display device is disclosed in this application. In some implementations, a method and system for improving a perceived contrast of a screen of a display device is disclosed. Some implementations may also relate to a method and system for privately viewing content displayed on a screen.

Abstract: A method and system for zonal switching for light steering to produce an image having high dynamic range is described. The system comprises: a light source for providing light along an optical path; a spatial light modulator for directing portions of the light to off-state and on-state light paths, thereby producing an image, the spatial light modulator having a plurality of illumination zones corresponding to the image; and a set of sequentially-arranged optical elements in the optical path for steering at least some of the light from a first subset of the plurality of illumination zones to a second subset of the plurality of illumination zones to increase the dynamic range of the image. The dwell time of the one or more sequentially arranged optical elements can be modified to steer light.

Abstract: There are provided a display and an electronic unit capable of enhancing visibility. The display includes: a plurality of pixels each including a light-emission device, and having a light-transmission region in at least a part thereof; and one or more transmittance control devices capable of controlling a transmittance of incident light.

Abstract: An apparatus is described that selectively absorbs electromagnetic radiation. The apparatus includes a conducting surface, a dielectric layer formed on the conducting surface, and a plurality of conducting particles distributed on the dielectric layer. The dielectric layer can be formed from a material and a thickness selected to yield a specific absorption spectrum. Alternatively, the thickness or dielectric value of the material can change in response to an external stimulus, thereby changing the absorption spectrum.

Abstract: A tunable Radio Frequency (RF) filter device includes a tunable optical source generating an optical carrier signal, and a modulator coupled to the tunable optical source and modulating the optical carrier signal with an RF input signal. The tunable RF filter device may include first and second optical waveguide paths coupled to the modulator and having first and second dispersion slopes of opposite sign from each other, one or more of the first and second optical waveguide paths comprising an optical splitter and combiner pair therein, and an optical-to-electrical converter coupled to the first and second optical waveguide paths and generating an RF output signal with a frequency notch therein based upon the tunable optical source.

Abstract: A beam shaping device includes a first phase modulation unit including a phase-modulation type SLM, and displaying a first phase pattern for modulating a phase of input light, a second phase modulation unit including a phase-modulation type SLM, being optically coupled to the first phase modulation unit, and displaying a second phase pattern for further modulating a phase of light phase-modulated by the first phase modulation unit, and a control unit providing the first and second phase patterns to the first and second phase modulation units, respectively. The first and second phase patterns are phase patterns for approximating an intensity distribution and a phase distribution of light output from the second phase modulation unit, to predetermined distributions.

Abstract: An imaging lens unit is presented, comprising an imaging lens having a lens region defining an effective aperture, and a phase coder. The phase coder may be incorporated with or located close to the lens region. The phase coder defines a surface relief along the lens region formed by at least three phase patterns extending along the lens region. Each of the phase patterns differently affecting light components of one of at least three different wavelength ranges while substantially not affecting propagation of light components of other of said at least three wavelength ranges. The surface relief affects light propagation through the lens region to extend a depth of focus for at least one of said at least three wavelength ranges.

Abstract: A super-oscillatory lens (10) having a pre-defined pattern to spatially modulate the light beam in amplitude and/or phase which has a blocking element (6) formed integrally with the lens, or as a separate component adjacent to the lens, which is opaque to the light beam to cause diffraction of the light beam around the blocking element and formation of a shadow region (20). The lens and blocking element focus the light beam to form an elongate needle-shaped focus (15) in the shadow region (20). In any application in which it is necessary to scan a small spot over a surface, compared with a conventional objective lens focus the elongate shape of the focus relaxes the requirement on a feedback loop to maintain a constant separation between a scan head and a surface being scanned. The elongate shape is also ideal shape for materials processing applications.

Abstract: A display has a screen which incorporates a light modulator. The screen may be a front projection screen or a rear-projection screen. The screen is illuminated with light from a light source comprising an array of controllable light-emitters. The controllable-emitters and elements of the light modulator may be controlled to adjust the intensity of light emanating from corresponding areas on the screen. The display may provide a high dynamic range.

Abstract: In a method and system for controlling the shape of an optical pulse, the two-dimensional shape of the phase front is controlled using a first control device and the shape of the phase front and the two-dimensional shape of the pulse front is controlled using a second control device. The combined effect on the phase front results in a desired overall phase front control and the second device provides the desired overall pulse front control. This enables the phase front control and pulse front control to be decoupled. Correcting for pulse lengthening of femtosecond laser pulses during focusing by a dispersive lens. The spatially varying phase (72) introduced by the lens can be corrected for by a spatial light modulator like (SLM) a liquid crystal modulator. The spatially varying arrival time at the focus (70) can be compensated for by a deformable mirror (DM). A controller with a feedback loop and pulse characterization in the focus can compensate for the errors introduced by any dispersive focusing means.

Abstract: Standing wave-generating planar wave illumination units generate two light-wave planar waves using light from a light source assembly and irradiate a sample surface with a standing wave produced by interference of the planar waves on the sample surface. A bias planar wave illumination unit generates a bias planar wave using light from the light source assembly and irradiates the sample surface with the wave. The bias planar wave is synchronized with the standing wave to alternately oscillate to positive and negative with an equal electric field displacement irrespective of the position on the sample surface across a reference time specified in advance when the displacement of the standing wave has a value “0” at the respective positions on the sample surface, and oscillates at a bias amplitude specified in advance to raise the displacement of the standing wave on the sample surface to only a positive or negative displacement.

Abstract: A photonic signal processor providing finite impulse response filtering of an external input signal, the processor including: a photonic signal input having a predetermined wavelength range, a Bragg grating structure interconnected to the photonic signal input and having a series of localized modifications to the periodicity of the grating structure so as to provide a predetermined transmission output window within the stopband of the Bragg grating structure and predetermined wavelength range; a modulator interconnected to the grating structure for modulating the output from the grating structure in accordance with the external signal input; a delay structure for providing a wavelength variable delay to the output from the modulator; an intensity detector interconnected to the delay structure for determining and outputting the intensity of the delay structure output.

Abstract: A light sheet optical system comprising means for forming a light sheet using a non-diffractive or quasi non-diffractive and/or propagation invariant beam that has an asymmetric intensity beam profile transverse to the direction of propagation, such as an Airy beam.

Abstract: An image display to provide a realistic 3D stereoscopic image of a desired scene. The display device is comprised of directional pixels. Each directional pixel has a plurality of facets having a constrained viewing angle. Each facet has a point source of light that emits light with a controllable luminescence and hue. In this regard, each facet of the directional pixel has a constrained viewing angle and independent luminance and hue.

Abstract: A system for controlling switchable glass based upon intention detection. The system includes a sensor for providing information relating to a posture of a person detected by the sensor, a processor, and switchable glass capable of being switched between transparent and opaque states. The processor is configured to receive the information from the sensor and process the received information in order to determine if an event occurred. This processing includes determining whether the posture of the person indicates a particular intention, such as attempting to take a photo. If the event occurred, the processor is configured to control the state of the switchable glass by switching it to an opaque state to prevent the photo-taking of an object, such as artwork, behind the switchable glass.

Abstract: A window element having a window shade is provided. The window element has a viewing area, comprising a window shade element. The window shade element includes an electrically darkable element, and the window shade element is movable between a first position and a second position. In the first position, the window shade element is covering a first portion of the viewing area, and in the second position, the window shade element is covering a second portion of the viewing area. The first portion and the second portion are unequal.

Abstract: An optical waveguide for transmitting an optical signal input to the optical waveguide with a first frequency. The optical waveguide includes a plurality of modulator circuits configured along an optical transmission channel. Each modulator circuit includes at least one resonant structure that resonates at the first frequency when the modulator circuit that includes the at least one resonant structure is at a resonant temperature. Each modulator circuit has a different resonant temperature.

Abstract: A tunable Radio Frequency (RF) filter device includes a tunable optical source configured to generate an optical carrier signal, and a modulator coupled to the tunable optical source and configured to modulate the optical carrier signal with an RF input signal. The tunable RF filter device may also include first and second optical waveguides coupled to the modulator and having first and second dispersion slopes of opposite sign, and an optical-to-electrical converter coupled to the first and second optical waveguides and configured to generate an RF output signal with a frequency notch therein based upon the tunable optical source.

Abstract: A method of controlling an electro-optical device includes controlling a driving section such that, when an image is rewritten from a first image displayed in a first gradation to a second image including a background image portion to be displayed in the first gradation and a main image portion to be displayed in a second gradation, the same potential as a counter electrode is supplied to a pixel in the background image portion, and a potential corresponding to the second gradation is supplied to a pixel in the main image portion. The driving section is controlled such that at least one of the magnitude and application time of a voltage applied between the pixel electrode and the counter electrode is smaller in a pixel corresponding to an edge portion in the main image portion than in a pixel corresponding to a non-edge portion in the main image portion.

Abstract: A scan projection device and a controlling method are projected. The scan projection device comprises a light source module, a scanning module and a scan driving device. The light source module is for providing an image beam. The scanning module has a first direction scanning frequency and a second direction scanning frequency. The first direction scanning frequency is 2N+1 times of the second direction scanning frequency, wherein N is an integer. The scanning module is for projecting the image beam towards a particular direction and scanning a projection surface. The scan driving device controls the scanning module to scan the projection surface back and forth along a scan trace at the first direction scanning frequency and the second direction scanning frequency.

Abstract: A high sensitivity transient grating ultrafast radiation to optical image converter is based on a fixed transmission grating adjacent to a semiconductor substrate. X-rays or optical radiation passing through the fixed transmission grating is thereby modulated and produces a small periodic variation of refractive index or transient grating in the semiconductor through carrier induced refractive index shifts. An optical or infrared probe beam tuned just below the semiconductor band gap is reflected off a high reflectivity mirror on the semiconductor so that it double passes therethrough and interacts with the radiation induced phase grating therein. A small portion of the optical beam is diffracted out of the probe beam by the radiation induced transient grating to become the converted signal that is imaged onto a detector.

Abstract: A synchronizable optomechanical oscillator (OMO) network including at least two dissimilar silicon nitride (Si3N4) optomechanical resonators that can be excited to evolve into self-sustaining optomechanical oscillators (OMOs) coupled only through an optical radiation field. The tunability of the optical coupling between the oscillators enables one to externally control the dynamics and switch between coupled and individual oscillation states.

Abstract: An optical phased array (100) and a method (200) of forming an optical beam using an optical phased array (100) are disclosed. The optical phased array (100) comprises an optical head (116) for producing an output light beam, a spread spectrum modulation module (112), and a module (114) for controlling the phase of spread-spectrum-modulated light beams. The optical head (116) has a reference surface in the optical head (116) and comprises a number of sub-apertures (130) each for receiving a respective light beam. The reference surface (116) produces a backreflected light signal (126). The spread spectrum modulation module (112) modulates each of the light beams to have a spread spectrum signal for isolating the respective modulated light beam, which is provided to the optical head (116). The module (114) for controlling the phase of the spread-spectrum-modulated light beams is dependent upon the backreflected light signal (126) and the spread spectrum modulation.

Abstract: An optical switch includes an array of parallel few-mode fibers stacked vertically; beam stretchers that modifies an aspect ratio between a height and a width of beams associated with each few-mode fiber; a spatial light modulator with a 2D array of independently programmed tunable pixels, wherein the spatial light modulator manipulates phase and/or amplitude at each position of an incident optical beam; a wavelength demultiplexer which can separate the spectral components of an incident beam in angle; and lenses for imaging the modes of the input array of fiber to the spatial light modulator.

Abstract: Light emitting elements in an illumination unit of a display may be blanked during updates of pixels of a spatial light modulator (SLM). Updates of pixels in different segments of the SLM may be coordinated with blanking of corresponding segments of the illumination unit. Updating of segments of a light source (30A-30D) may be coordinated so that not all segments are updated in each frame (34A-37D) of a video.

Abstract: In the control of light condensing irradiation of laser light using a spatial light modulator, the number of wavelengths, a value of each wavelength, and incident conditions of the laser light are acquired, the number of light condensing points, and a light condensing position, a wavelength, and a light condensing intensity on each light condensing point are set, and a light condensing control pattern is set for each light condensing point. Then, a modulation pattern presented in the spatial light modulator is designed in consideration of the light condensing control pattern. Further, in the design of a modulation pattern, a design method focusing on an effect by a phase value of one pixel is used, and when evaluating a light condensing state, a propagation function to which a phase pattern opposite to the light condensing control pattern is added is used.

Abstract: A display system, having an emissive body, emitting light in a way that is color temperature controllable. The light emission can be from zones. The emissive body can be a FIPEL type device with a first transparent conductive coating over a light emitting substrate. The zones are each separately controllable for color temperature.

Abstract: In an embodiment, a power selective optical filter device includes an input polarizer for selectively transmitting an input signal. The device includes a wave-plate structure positioned to receive the input signal, which includes at least one substantially zero-order, zero-wave plate. The zero-order, zero-wave plate is configured to alter a polarization state of the input signal passing in a manner that depends on the power of the input signal. The zero-order, zero-wave plate includes an entry and exit wave plate each having a fast axis, with the fast axes oriented substantially perpendicular to each other. Each entry wave plate is oriented relative to a transmission axis of the input polarizer at a respective angle. An output polarizer is positioned to receive a signal output from the wave-plate structure and selectively transmits the signal based on the polarization state.

Abstract: An illumination device for illuminating a reticle surface as an illumination target surface with illumination light supplied from a light source is provided with a first polarization beam splitter for separating the illumination light into a first beam and a second beam with respective polarization directions orthogonal to each other; a deformable mirror which is arranged in an optical path of the second beam and a shape of a reflecting surface of which is variable for changing a phase difference distribution between the first beam and the second beam; and a second polarization beam splitter for combining the first beam and the second beam between which the phase difference distribution has been established. The illumination target surface can be illuminated with light having a distribution of various polarization states.

Abstract: An electro-optical device includes an electro-optical material, a first lens which is arranged at an incident side of the light and is provided so as to correspond to a pixel, and a condenser lens which is arranged at an emitting side of the light and is provided so as to correspond to the pixel. Condensation degrees of the first lens are larger than that of the second lens, and distances between the first lens and the electro-optical material are smaller than distances between the second lens and the electro-optical material.

Abstract: An optical plate includes a substrate and a resonator structure formed on or in the substrate, wherein the resonator structure is configured to produce an abrupt change in phase, amplitude and/or polarization of incident radiation.

Abstract: A display device includes a waveguide, a reconfigurable phase mask, and a controller. The controller dynamically reconfigures the reconfigurable phase mask so as to modulate display light in accordance with a detected position of an eye and/or a parameter for a shape of the waveguide. The waveguide transmits the modulated display light.

Abstract: A method and apparatus for displaying a reflective image in response to light emitted from an emissive display is disclosed. An apparatus includes an emissive display, a processor in communication with the emissive display, and an electronic cover proximate to the emissive display. The electronic cover includes a passive display layer having a plurality of passive display elements and a photosensitive layer responsive to emitted light from the emissive display. A method includes forming an emitted light image on the emissive display and exposing the photoconductor layer of the electronic cover to an emitted light image, causing the plurality of passive display elements to form a reflective image on the passive display layer so that the reflective image corresponds to the displayed image.

Abstract: A method and system for zonal switching for light steering to produce an image having high dynamic range is described. The system comprises: a light source for providing light along an optical path; a spatial light modulator for directing portions of the light to off-state and on-state light paths, thereby producing an image, the spatial light modulator having a plurality of illumination zones corresponding to the image; and a set of sequentially-arranged optical elements in the optical path for steering at least some of the light from a first subset of the plurality of illumination zones to a second subset of the plurality of illumination zones to increase the dynamic range of the image. The dwell time of the one or more sequentially arranged optical elements can be modified to steer light.

Abstract: This disclosure is directed to a method and apparatus for generating marker and comb indicia in an optical environment using a Mach-Zehnder (M-Z) modulator. High speed recording devices are configured to record image or other data defining a high speed event. To calibrate and establish time reference, the markers or combs are indicia which serve as timing pulses (markers) or a constant-frequency train of optical pulses (comb) to be imaged on a streak camera for accurate time based calibration and time reference. The system includes a camera, an optic signal generator which provides an optic signal to an M-Z modulator and biasing and modulation signal generators configured to provide input to the M-Z modulator. An optical reference signal is provided to the M-Z modulator. The M-Z modulator modulates the reference signal to a higher frequency optical signal which is output through a fiber coupled link to the streak camera.

Abstract: A method of projecting into space, from a first object, a plurality of modulated lines to form a grid defining a first relative reference frame, the method includes projecting polarized light having a first orientation to form a horizontal grid line projecting from the first object and projecting polarized light having a second orientation different than the first orientation to from a vertical grid line projecting from the first object and modulating the horizontal grid line and the vertical grid line to carry first and second grid words, respectively.

Abstract: The design method for complex electromagnetic materials is expanded from form-invariant coordinate transformations of Maxwell's equations to finite embedded coordinate transformations. Embedded transformations allow the transfer of electromagnetic field manipulations from the transformation-optical medium to another medium, thereby allowing the design of structures that are not exclusively invisible. A topological criterion for the reflectionless design of complex media is also disclosed and is illustrated in conjunction with the topological criterion to design a parallel beam shifter and a beam splitter with unconventional electromagnetic behavior.

Abstract: An optical modulation device includes: an optical modulator; an insulating layer; an RC circuit including a resistor and a capacitor connected in series; a bonding wire connected between the optical modulator and the RC circuit; a first metal layer provided on the insulating layer; and a second metal layer that has a width larger than that of the first metal layer and is provided on the insulating layer, the second metal layer being connected with a ground potential and being connected to the RC circuit via the first metal layer.

Abstract: A device electrically contacts an electrically activatable functional layer of a vehicle windowpane that is adjustable by a windowpane driver. The device has the windowpane driver with at least two first contact elements for the transmission of control signals to the functional layer. In an as-intended installed state, the first contact elements are in electrical contact directly with at least two corresponding first contact points of the functional layer or of a windowpane holder directly securing the vehicle windowpane.

Abstract: A see-through display device (100A) according to the present invention includes a first substrate (11) and a second substrate (12) disposed opposing to each other and a light modulation layer (17) disposed between the first substrate (11) and the second substrate (12). The light modulation layer (17) contains at least two types of materials which come into a bleached state or a colored state depending on an applied voltage and which have visible light absorption spectra different from each other.

Abstract: A SAL beacon emulates the signature (e.g. spectral band, sire and shape. power level and designation code) of a SAL designator beam reflected off a target. The SAL beacon is field-portable, capable of extended continuous operation and eye-safe. The SAL beacon enables “captive” flight tests of munitions and SAL receivers without the logistical complications of using an operational SAL designator.

Abstract: A multi spectrum vision aid, use thereof, and a method using the aid. The present invention relates in a first aspect to a multi spectrum vision aid comprising at least two transparent elements, in a second aspect to use thereof and in a third aspect to a method of distinguishing elements in a population.

Abstract: A laser light shaping and wavefront controlling optical system 1 in accordance with an embodiment of the present invention comprises an intensity conversion lens 24 for converting and shaping an intensity distribution of laser light incident thereon into a desirable intensity distribution; an optical modulation device 34 for modulating the laser light emitted from the intensity conversion lens 24 so as to control a wavefront thereof; a condenser optical system 36 for converging the laser light issued from the optical modulation device 34; and an image-forming optical system 30, arranged between the optical modulation device 34 and the condenser optical system 36, having an entrance-side imaging plane between a plane 24x where the laser light emitted from the intensity conversion lens 24 attains the desirable intensity distribution and a modulation plane 34a of the optical modulation device 34 and an exit-side imaging plane on a pupil plane 36a of the condenser optical system 36.

Abstract: The invention relates to a multi-layered foil body (1) for marking a security document, in particular a banknote. The foil body (1) has at least one color filter layer (2) and at least one change layer (4) with an electrically controllable transmittance and/or an electrically controllable color.

Abstract: [PROBLEM] Providing an optical source that outputs optical frequency modulated light having a constant output optical intensity. [MEANS FOR SOLVING THE PROBLEM] Provided is a light source apparatus that outputs an optical signal having an optical frequency corresponding to a frequency control signal, the light source apparatus including a laser light source section that outputs laser light having an optical frequency corresponding to the frequency control signal; and an optical intensity adjusting section that compensates for intensity change of the laser light to output laser light in which the intensity change caused by a change in the optical frequency is restricted.

Abstract: There is provided a method and system for optical imaging of a light scattering object. The method comprises the detection of one or more time-gates of a temporal point spread function (TPSF) to be used to construct an image of optical properties of the object. The method also comprises the simultaneous detection of two or more selected time-gates using a time-gated camera. The method enables more efficient spatial-temporal acquisition of optical signals for imaging purposes.

Abstract: An optical phased array formed of a large number of nanophotonic antenna elements can be used to project complex images into the far field. These nanophotonic phased arrays, including the nanophotonic antenna elements and waveguides, can be formed on a single chip of silicon using complementary metal-oxide-semiconductor (CMOS) processes. Directional couplers evanescently couple light from the waveguides to the nanophotonic antenna elements, which emit the light as beams with phases and amplitudes selected so that the emitted beams interfere in the far field to produce the desired pattern. In some cases, each antenna in the phased array may be optically coupled to a corresponding variable delay line, such as a thermo-optically tuned waveguide or a liquid-filled cell, which can be used to vary the phase of the antenna's output (and the resulting far-field interference pattern).

Abstract: Provided are examples of light modulators and optical apparatuses that may include the light modulators. A light modulator may include a plasmonic nano-antenna and an element for changing plasmon resonance characteristics of the plasmonic nano-antenna. The plasmon resonance characteristics of the plasmonic nano-antenna may be changed due to a change in refractive index of the element, and thus light may be modulated.

Abstract: An apparatus comprising a modulation block comprising a plurality of modulators, wherein each of the plurality of modulators comprises an optical input port and an optical output port, and wherein all of the optical input ports and all of the optical output ports are positioned on one face of the modulation block. Another apparatus comprising a modulation block comprising one or more Mach-Zehnder modulators (MZMs), wherein each MZM is coupled to an optical input port, an optical output port, and at least one electrical trace, wherein all of the optical input ports and all of the optical output ports are positioned on a first side of the modulation block, and wherein all of the electrical traces are positioned on a second side of the modulation block, and a planar lightwave circuit (PLC) coupled to the modulation block via an optical interface.