250results about "Holographic optical components" patented technology

Aspects of the disclosure include a method for controlling a vehicle via a holographic interface. Aspects include detecting a request, by an occupant of the vehicle, to display a holographic user interface and instructing a holographic display device to display the holographic user interface. Aspects also include detecting an interaction between the occupant and the holographic user interface, identifying a desired action for the vehicle based on the interaction, and instructing the vehicle to perform the desired action.

A light guide plate for image display can display clear images even when a resin base is used. The Sight guide plate configured for image display may include a first resin base and a hologram layer. The first resin base may have an MC value of 0.120 or less, obtained by evaluation using shadow contrast, according to expression (1):MC=Lmax-LminLmax+Lmin,(1)wherein Lmax is a maximum value of brightness from a brightness distribution, Lmin is a minimum value of the lightness from the brightness distribution, and MC is an MC value that objectively represents a magnitude of a dip in low brightness portions in the brightness distribution.

An illumination system 700 having a first and second telescope each comprising a respective array of micro-lenses 604, 606 and 704, 706 which are optically coupled to form respective arrays of micro-l

A replication method for producing a hologram copy by simultaneous exposure of a master hologram and a copy carrier comprising a photosensitive material is provided. The contact body is brought into contact with the copy carrier during the exposure, the contact body and the copy carrier directly touching one another in a part through which exposure light is radiated during the exposure. The contact body is transparent to the exposure light, and the refractive index of the contact body is matched to the refractive index of the copy carrier. Also provided is a device for realizing the replication method.

A projection system comprising a display device, a hologram engine and a waveguide. The display device is arranged to display a hologram of an image and spatially modulate light in accordance with the hologram to form a holographic wavefront. The hologram engine is arranged to calculate the hologram. The hologram is arranged to angularly distribute light within the holographic wavefront in accordance with spatial position within the image such that continuous angular ranges of the holographic wavefront respectively correspond with continuous regions of the image. The waveguide comprising a pair of parallel reflective surfaces arranged to waveguide the holographic wavefront therebetween. A first surface of the pair of parallel reflective surfaces is partially reflective-transmissive so as to form an output comprising a plurality of emission zones for the holographic wavefront. The hologram engine is arranged to modify the hologram to at least partially compensate for a decrease in intensity of the emission from each successive emission zone of the waveguide caused by the partial reflection-transmissions at the first surface during waveguiding.

A method comprising: receiving a first signal indicating a first viewing position of a user within a viewing space of a head-up display; determining a first intensity for a first target image based on a distance between the first viewing position and a predetermined reference viewing position within the viewing space; and illuminating a first hologram corresponding to the first target image to holographically reconstruct the first target image at the first intensity; then, receiving a second signal indicating a second viewing position of the user within the viewing space, wherein the second viewing position is different to the first viewing position; and determining a second intensity for a second target image based on a distance between the second viewing position and the predetermined reference viewing position within the viewing space; illuminating a second hologram corresponding to the second target image to reconstruct the second target image at the second intensity; wherein the second intensity is different to the first intensity, and a difference between the first intensity and the second intensity indicates whether the second viewing position is closer to the predetermined reference viewing position or further from the predetermined reference viewing position compared to the first viewing position.

This application relates to a holographic display device comprising a backlight unit and a spatial light modulator, wherein the backlight unit is used to emit light. The spatial light modulator includes a plurality of pixels and a color filter layer comprising a plurality of color filter groups. The pixels are arranged in a zigzag pattern and configured to modulate at least one of the amplitude and phase of the light. Each of the color filter groups includes a first subgroup, a second subgroup, and a third subgroup, the first subgroup including a plurality of first color filters, the second subgroup including a plurality of second color filters, and the third subgroup including a plurality of third color filters, and each pixel is aligned with one of the first, second, and third color filters of the color filter layer.

Disclosed are illumination devices for motor vehicles, comprising a reflective hologram (2). A light-guiding element (1) is provided for directing light from a light source arrangement (4) onto the hologram (2).

A display system and light control layer is described. The display system comprises an optical component having a reflective surface. A light control layer is disposed on a first surface of the optical component on an optical path of sunlight to the reflective surface. The light control layer comprises a louvre structure comprising an array of louvres. Each louvre is arranged at an orientation angle relative to the first surface. The separation between adjacent / neighbouring louvres is such that the distal end / edge of one louvre overlaps the proximal end / edge of the adjacent / neighbouring louvre.

There is provided an optical system having a viewing window. The optical system comprises a display device arranged to spatially modulated light in accordance with a hologram displayed thereon to form a holographic wavefront. The holographic wavefront forms a holographic reconstruction of an image downstream of the display device. The optical system further comprises a waveguide arranged to receive the holographic wavefront and waveguide the holographic wavefront between a pair of reflective surfaces thereof. One surface of the pair of reflective surfaces is partially transmissive such that a plurality of replicas of the holographic wavefront are emitted therefrom. The optical system further comprises an optical component between the holographic reconstruction and the waveguide, wherein the optical component is arranged to (a) form a virtual image of the holographic reconstruction upstream of the display device and (b) form an image of the displayed hologram at infinity or downstream of the waveguide.

The invention relates to a system for a functionalized door pane through which person- and / or object-related authorization control can be performed. For person-related control, a holographically based, stereoscopic Holocam, which can be integrated into the pane, can be included. Furthermore, a holographic display, which can also be integrated into the pane, can be included. By appropriate methods, the authorization control can be performed, and a door locking mechanism and a holographic display can be controlled by the control device.

The lighting device of the present application includes a light source unit having a light emitting element; a spatial light phase modulator that performs spatial light phase modulation on incident light from the light source unit, thereby generating a plurality of reproduced images having intervals therebetween on an image surface; and a projection unit that superimposes and projects the plurality of reproduced images on a projection surface through separate projection lenses.

An image reproduction device 6 reproduces an image including N different parameters of a wavelength range or the like, and comprises: a multiplexed hologram acquisition unit 61 for acquiring N to 2N multiplexed holograms obtained by multiplex-recording interference patterns for each parameter; a parameter selection unit 63 for selecting the parameters one by one; a hologram generation unit 64 for generating a calculation hologram including two light waves having the selected parameters from the multiplexed holograms; and a light wave restoration unit 65 for restoring one of the two light waves from the calculation hologram.

The present disclosure relates to a device for printing dual holographic, including a plurality of lasers that represents different wavelengths, a plurality of dichroic lenses and mirrors that combine beams output from the plurality of lasers into one beam and output the combined beam as a white beam, a plurality of beam splitters that separates the white beams output through the plurality of dichroic lenses and mirrors, transmit the separated white beams to a stereogram printing device, a wavefront printing device, and a reference beam, separates a beam heading to the reference beam, and transmits the separated beam to the stereogram printing device and the wavefront printing device, and a computer that controls the stereogram printing device and the wavefront printing device so that a hologram is printed with the beam transmitted through the beam splitters.

A holographic display includes a light source configured to emit incoherent light, a spatial light modulator (SLM) disposed at a Fourier plane of the light source and configured to modulate the incoherent light and emit the modulated incoherent light as diffused light, and at least one lens disposed downstream of the spatial light modulator and configured to focus the modulated incoherent light, and the spatial light modulator receives an RGB-D image signal and converts the incoherent light array incident from the light source into a first light, which is a coherently-reconstructed incoherent sum (CRIS) for implementing a 3D hologram.

One objective of the present invention is to provide a technique for measuring a sample by irradiating it with near-infrared light. Another objective of the present invention is to provide a technique for improving the signal-to-noise ratio of the measurement. [Solution] The optical measurement system 1 includes a first light source that generates near-infrared light, a silicon-based image sensor D, and an optical system including beam splitters BS1 and BS2 that split the light from the first light source into a first light and a second light. The optical system is configured to record a first hologram obtained by illuminating a sample S with the first light and modulating the resulting light with the second light, which is divergent light, using the image sensor.

A diffuser arranged to rotate around a rotation centre thereof is provided. Each point on the diffuser forms a diffusion profile that is a function of radial distance from the rotation centre but rotationally invariant.

An optical device and a display device including the same are provided. The optical device includes a first backlight configured to output first light of a first wavelength through a first output coupler; a first lens disposed to face the first output coupler and to have a focal length with respect to the first light; a second backlight including a second output coupler, the second backlight configured to output second light of a second wavelength through the second output coupler; a second lens disposed to face the second output coupler and to have different focal lengths with respect to the first light and the second light; a third backlight including a third output coupler, the third backlight configured to output third light of a third wavelength through the third output coupler; and a third lens disposed to face the third output coupler and to have different focal lengths with respect to the first light, the second light, and the third light.

A device for manufacturing a holographic optical element is provided with: a laser light source (1); a branching mirror (4) that branches the laser beam (L1) irradiated from the laser light source (1) into a laser beam (L2) and a laser beam (L3); a mirror (6) that reflects the laser beam (L2); a light guide plate (20) including a holographic optical element (11a); a coupler (10a) that causes the laser light (L3) to be incident on the light guide plate (20); and a displacement unit that displaces the irradiation position of the laser light (L3).

A head-up display for a vehicle comprises an optical component having a reflective surface arranged, during head-up display operation, in a configuration that is conducive to sunlight glare. A light control layer is disposed on the optical component to receive sunlight on an optical path to the reflective surface. The light control layer comprises a sunlight-receiving surface and a core material separating an array of louvres. The sunlight-receiving surface of the light control layer is serrated in coordination with the array of louvres so as to deflect received sunlight away from the eye-box of the head-up display.

A display device for the interior of a vehicle comprises light sources, light guides, and holograms. The light guides are arranged next to one another and each has an entrance surface and a reflective area. Each light source emanates light that enters the entrance surface of an associated light. At least one of the holograms is arranged at or in each light guide. The light emanated by each light source enters the entrance surface of the associated light guide in a direction of the reflective area of the associated light guide, is reflected by the reflective area of the associated light guide in a direction of the hologram of the associated light guide, and interacts with the hologram of the associated light guide.

A method of determining a hologram of an image for a system comprising a display device and viewing system. The display device is arranged to display the hologram. The viewing system is arranged to view the hologram through a pupil expander. The pupil expander provides a plurality of light propagation paths from the display device to the viewing system. The method comprises first to fifth stages. The first stage comprises determining a first complex light field at an entrance pupil of the viewing system. The first complex light field results from the propagation of light from a display plane of the display device along at least one light propagation path of the pupil expander. The first stage also comprises cropping in accordance with the entrance pupil of the viewing system. The second stage comprises determining a second complex light field at a sensor plane of a sensor of the viewing system. The second complex light field results from the propagation of light of the first complex light field from the entrance pupil through a lens of the viewing system. The second stage also comprises modifying the amplitude component in accordance with the image. The third stage comprises determining a third complex light field at the entrance pupil. The third complex light field results from the reverse propagation of light of the second complex light field from the sensor plane back through the lens. The third stage also comprises cropping in accordance with the entrance pupil. The fourth stage comprises determining a fourth complex light field at the display plane. The fourth complex light field results from the propagation of light of the third complex light field back along the at least one light propagation of the pupil expander. The fourth stage also comprises cropping in accordance with the display device. In a fifth stage, the hologram is extracted from the fourth data set.

An aspect of the present disclosure provides a hybrid recording system, wherein the hybrid recording system, with respect to incident light from a target object, comprises an objective lens, a circular polarizer, a geometric phase lens, a variable waveplate, a linear polarizer, and an image sensor that are sequentially arranged and aligned with one optical axis, and wherein the variable waveplate operates in an ON mode to convert a wavefront of two orthogonal circular polarization components that are output from the geometric phase lens into two orthogonal linear polarization components, or operates in an OFF mode.

A zero-order suppression device for a holographic wavefront. The device comprises a first microlens array, "MLA", a second microlens array and a spatial filter. Each first microlens of the first microlens array is coupled to a corresponding second microlens of the second microlens array to form an array of microlens pairs. The spatial filter is disposed between the first microlens array and second microlens array. The spatial filter comprises an array of light suppression elements. Each light suppression element is aligned with a corresponding microlens pair.

A dark field digital holographic microscope and associated metrology method is disclosed which is configured to determine a characteristic of interest of a structure. The dark field digital holographic microscope includes an illumination branch for providing illumination radiation to illuminate the structure; a detection arrangement for capturing object radiation resulting from diffraction of the illumination radiation by the structure; and a reference branch for providing reference radiation for interfering with the object radiation to obtain an image of an interference pattern formed by the illumination radiation and reference radiation. The reference branch has an optical element operable to vary a characteristic of the reference radiation so as to reduce and / or minimize variation in a contrast metric of the image within a field of view of the dark field digital holographic microscope at a detector plane.

The present disclosure relates to an optical element intended to be worn in front of the eye of a wearer. This optical element has two main surfaces and comprises at least one holographic diffusing element having a diffusing property resulting from a spatial variation of the refractive index of said holographic diffusing element. This spatial variation of the refractive index is greater than 0.001 at at least one given wavelength over a distance of less than 30 pm. The present disclosure also includes an optical equipment comprising such an optical element and a method for recording a holographic medium onto an optical lens.

A beam deflector includes a first electrode layer including a plurality of line electrodes extending in a first direction and arranged parallel to each other in a second direction crossing the first direction; a second electrode layer separated from the first electrode layer by a predetermined distance to face the first electrode layer; and a deflection layer between the first electrode layer and the second electrode layer and having a plurality of optically anisotropic molecules controlled by an electric field formed between the first electrode layer and the second electrode layer. Each of the optically anisotropic molecules has an ellipse shape having a major axis and a minor axis, wherein the major axis is arranged to head for the first direction.

An optical measurement method includes: preparing an optical system for recording a hologram caused by modulating, with a reference beam, an object beam obtained by illumination of a sample with illumination light, the reference beam being coherent to the illumination light; arranging a calibration unit on an optical path of the illumination light in a state where there is no sample, the calibration unit including an optical system that produces a known optical wave distribution; recording a first hologram caused while the calibration unit is producing an optical wave distribution; and calculating information about an optical wave distribution of the reference beam based on information indicating a position where the calibration unit is arranged, the known optical wave distribution, and the first hologram.

An advance in high-resolution optical metrology has been achieved by the introduction of incoherent holographic imaging. FINCH, an example of incoherent holography, is shown to simplify the process, eliminating many steps in metrology and at the same time increasing throughput, resolution and accuracy of the method. A proposed technique requires only a single image capture with a non-moving camera rather than the capture of multiple stacks of images requiring many camera exposures and movement of the camera or sample in the conventional techniques.