24 results about "Light diffraction" patented technology

A display system includes a display including a plurality of pixels where each pixel includes a plurality of subpixels; and a diffractive off-axis collimation layer disposed on the display. The diffractive off-axis collimation layer includes diffractive regions configured to diffractively transmit light and non- diffractive regions configured to non-diffractively transmit light. The diffractive and non-diffractive regions are arranged relative to the subpixels so that the diffractive off-axis collimation layer at least partially collimates light along a first off-axis direction making an angle of at least 5 degrees with a thickness direction of the display.

A computer-free system and method is disclosed that uses an all-optical image reconstruction method to see through random diffusers at the speed of light. Using deep learning, a set of transmissive layers are trained to all-optically reconstruct images of arbitrary objects that are distorted by random phase diffusers. After the training stage, the resulting diffractive layers are fabricated and form a diffractive optical network that is physically positioned between the unknown object and the image plane to all-optically reconstruct the object pattern through an unknown, new phase diffuser. Unlike digital methods, all-optical diffractive reconstructions do not require power except for the illumination light. This diffractive solution to see through diffusive and / or scattering media can be extended to other wavelengths, and can fuel various applications in biomedical imaging, astronomy, atmospheric sciences, oceanography, security, robotics, autonomous vehicles, among many others.

The present invention provides an early strength material comprising calcium formate powder, wherein, in the volume cumulative particle size distribution of the calcium formate powder determined by laser diffraction scattering method, 90% of the particles have a particle size (D90) of less than 1200 μm.

The application provides a reconfigurable mask and a reconfiguration method. The reconfigurable mask comprises: a mask array comprising at least one light modulation unit; and a driving module connected to each light modulation unit, the driving module being configured to provide a driving voltage for each light modulation unit. The light modulation unit comprises: a light modulation component comprising a phase modulation layer, the phase modulation layer being configured to change the phase of incident light based on the input driving voltage; and an output, the output being configured to output the incident light with the changed phase. Based on the reconfigurable mask, the target light field pattern can be iteratively learned and optimized based on the back propagation principle of the light diffraction neural network model, and the voltage parameters of the light diffraction neural network model can be optimized and configured through the electro-optic phase modulation technology to generate the driving voltage. In this way, through a modulable mask, the target light field pattern is taken as the iterative learning target, different wafer patterns are realized, the reconfigurable mask is multiplexed, and the manufacturing cost is saved.

The present invention includes a focusing device comprising micro-diffraction elements configured to diffract incident light applied by a user into G focused beams, wherein each micro-diffraction element belongs to one of the G groups, the micro-diffraction element belonging to the g-th group of the G groups generates the g-th focused beam, the density distribution of the micro-diffraction elements belonging to the g-th group is adjusted to apply an arbitrary intensity distribution to the g-th focused beam before it is focused, the position of the micro-diffraction elements belonging to the g-th group is adjusted to apply an arbitrary wavefront to the g-th focused beam before it is focused, and G is 2 or greater.

A therapy light that can be utilized for therapy and play to provide a sensory interaction for the user to enhance visual stimulation. The light includes a first tube member having a first end and a second end having a hollow passage therebetween. A plurality of light members are disposed within the hollow passage of the first tube member and are configured to emit light upon movement of the invention. The first tube member has secured to the outer wall thereof a diffraction member. The diffraction member includes an outer surface having light diffractors formed thereon having a multitude of angled surfaces to direct light emissions in a multitude of directions. The first tube member is disposed within a second tube member wherein the second tube member is transparent and having a closed first end and second end with hollow passage to accommodate the first tube member.

An image light guide system including an image light guide having an out-coupling diffractive region. The out-coupling diffractive region includes one or more sub-regions having diffractive features arranged to diffract at least a first portion of image-bearing light toward an eyebox. The image light guide system also includes a blocking region having a plurality of blocking features arranged to prevent a second portion of image-bearing light reflected from the one or more sub-regions from exiting the image light guide system in a direction opposite the eyebox. In son examples the blocking region is disposed on a surface of the image light guide, on a surface of a low-index cladding layer, or on a surface of a support substrate positioned a distance from the image light guide.

The utility model relates to optical communication device technical field, concretely relates to a filter. The filter includes double fiber subassembly, diffraction element, lens, microcomputer subassembly and light splitting subassembly, diffraction element is located on the incident light path of light input end, is used for diffraction formation different wavelength light beam with the light output of light input end, the lens is located on the emergent light path of diffraction element, to focus the light of multiple different wavelengths that diffraction element output, microcomputer subassembly includes a plurality of reflecting mirrors, a plurality of reflecting mirrors are used for reflecting different wavelength light, light splitting subassembly sets up on the light path between light output end and diffraction element, light splitting subassembly is used for the light that is reflected back by a plurality of reflecting mirrors and carries out light splitting, a part of light is reflected back diffraction element and arrives at the place that reflecting mirror is equipped with detection layer, and reflecting mirror can adjust the reflection angle of itself according to the detection signal of detection layer. The filter can automatically track compensation according to the light attenuation change, guarantees the stable output of channel power.

There are provided a silver powder, which is able to form an electrically conductive film having a lower resistance value than that of conventional electrically conductive films when the silver powder is used as the material of an electrically conductive paste which is fired to form the electrically conductive film, and a method for producing the same. A first silver powder having one peak or more, at each of which a frequency is a local maximum value in a volume-based particle size distribution obtained by measuring the first silver powder in a dry process by means of a laser diffraction particle size analyzer, is mixed with a second silver powder having two peaks or more, at each of which a frequency is a local maximum value in a volume-based particle size distribution obtained by measuring the second silver powder in a dry process by means of a laser diffraction particle size analyzer, to produce a silver powder having three peaks or more, at each of which a frequency is a local maximum value in a volume-based particle size distribution obtained by measuring the silver powder in a dry process by means of a laser diffraction particle size analyzer, the silver powder having one peak, at which a frequency is a local maximum value in a volume-based particle size distribution obtained by measuring the silver powder in a wet process by means of a laser diffraction scattering particle size analyzer.

The present invention relates to an image distortion prevention filter and a method for manufacturing the same, wherein an irregularly shaped pattern is formed on a transparent substrate. According to the present invention, by forming an irregularly shaped metal pattern on a transparent substrate, light blurring due to periodic patterns is prevented, blocking light diffraction and interference phenomena, thereby preventing image distortion.

An optical computing device includes a light diffraction element group including light diffraction elements each having an optical computing function, and a light emitter that generates signal light inputted into the light diffraction element group and indicative of images formed by different optical systems.

The present application provides a small, high light utilization efficiency, less image display unit and head-mounted display. The image display unit of the present application has: image display device; polarized light diffraction element, diffracting light emitted from the image display device; and polarizer, transmitting polarized light diffracted by the polarized light diffraction element, and absorbing light not diffracted by the polarized light diffraction element, the polarized light diffraction element is a polarized light diffraction lens with lens function, the focal length of the polarized light diffraction lens is set as f, the distance between the image display device and the polarized light diffraction lens is set as d, and d≤f is satisfied.

An optical computing device includes: a light-diffraction element group including planar light-diffraction elements made of a photo-curable resin; and a tubular body that houses the light-diffraction element group and that has an inner surface to which at least a part of a perimeter of each of the planar light-diffraction elements is fixed.

This disclosure provides a method for constructing an all-optical diffraction neural network. The method includes: determining task attributes of an input image of a test object to determine the type of the all-optical diffraction neural network based on the determined task attributes; determining values ​​of multiple parameters associated with the all-optical diffraction neural network based on the determined type of the all-optical diffraction neural network, the multiple parameters including pixel size, diffraction distance, and input light wavelength; determining a Fresnel number for the all-optical diffraction neural network based on the values ​​of the multiple parameters; and constructing the all-optical diffraction neural network for modulating the input image based on the values ​​of the multiple parameters, in response to the determined Fresnel number being within a threshold range. This disclosure enables the constructed all-optical diffraction neural network to have low spatial complexity, be easy to implement, and exhibit excellent performance.

An object of the present disclosure is to provide a charged particle beam system capable of obtaining information about a sample by using a feature amount on an observed image caused by light interference, light diffraction, light standing waves, and the like caused by irradiating a sample with light, and the like. In the charged particle beam system according to the present disclosure, a first feature amount resulting from the light interference, the light diffraction, or the light standing wave generated by irradiating the sample with light is extracted from the observed image of the sample, and a second feature amount of the sample is obtained by using the first feature amount (see FIG. 6).

Methods and systems for forming holographic gratings are described herein. The methods and systems may decrease the amount of haze produced during exposure of a holographic recording medium. In some embodiments, the methods and systems include a holographic recording medium; a master hologram containing a grating; and a light source and moveable deflector configured to diffract light through the master hologram into the holographic medium to form a holographic interference pattern. The moveable deflector is configured to move in a direction parallel to the extending direction of the grating. Advantageously, moving the light in this direction allows the holographic interference pattern to remain stationary while there is a spatio-temporal displacement and cancellation of unwanted intensity nonuniformities.

The invention provides an optical module and a projector, which can miniaturize the device structure under the condition that an illumination optical system for scanning illumination light is adopted. This optical module is provided with: a light source that emits light; a light scanning unit that periodically scans the light emitted from the light source; and an image light generation unit that generates image light on the basis of scanning light scanned by the light scanning unit, the light scanning unit having: a diffractive optical element in which the diffraction angle of the light varies depending on the incident position of the light from the light source; and a movement mechanism that moves the diffractive optical element, the scanning light being moved by the diffractive optical element and scanning the illumination region of the image light generation unit.

An optical computing device includes: stacked light diffraction layers; and a first substrate. The stacked light diffraction layers are: disposed on optical paths of beams of signal light, configured to perform predetermined optical computing by causing the beams of the signal light that have passed through each of the light diffraction layers to interfere with each other, and contained in a single dried gel. Each of the stacked light diffraction layers includes microcells disposed in a matrix form and that have respective refractive indexes set individually so as to perform the predetermined optical computing. The dried gel is placed on the first substrate.

A light diffraction element includes a computing optical structure constituted by microcells, and a position adjustment optical structure outside the computing optical structure.

The purpose of this invention is to provide a mixed silver powder capable of imparting high thermal conductivity to metal bonding layers. This invention provides a mixed silver powder wherein, in a particle size distribution obtained by wet measurement using a laser diffraction particle size distribution measuring device, with the vertical axis representing the volume distribution ratio and the horizontal axis representing the particle size, there is a first peak and a second peak with a volume distribution ratio of 1% or more, wherein the particle size d of the first peak is... M1 The particle size d of the second peak mentioned above M2 The relationship satisfies the following equations (I) and (II): d M1 <d M2 …(I) 4.5μm≤d M2 -d M1 ≤16.0μm…(II), the relationship between the volume distribution ratio A of the peak with the smaller volume distribution ratio between the first peak and the second peak and the volume distribution ratio B of the peak with the smallest volume distribution ratio between the first peak and the second peak satisfies the following equation (III) or equation (IV): 1.2≤A / B…(III) 0=B / A…(IV).

An optical waveguide device for use in a head up display. The waveguide device provides pupil expansion in two dimensions. The waveguide device comprise a primary waveguide and a secondary waveguide, the secondary waveguide being positioned on a face of the primary waveguide. The secondary waveguide has a diffraction grating on a face opposite to the face which contacts the primary waveguide. The diffraction grating diffracts light into more than diffraction order. Rays diffracted into a non-zero order are trapped in the secondary waveguide by total internal reflection.

One aspect of the present application is a phosphor powder composed of Eu-containing α-Sialon phosphor particles. The volume-based median particle diameter (D 50 ) of the phosphor powder, measured using a laser diffraction scattering method, is 10 μm to 20 μm, and the diffuse reflectance for light having a wavelength of 600 nm is 93% to 99%.

This disclosure provides a touch display panel and its fabrication method, as well as a display device. The touch display panel includes: a substrate; a light-emitting layer comprising a plurality of pixels arranged in an array; a color filter layer comprising a plurality of color filter units corresponding to the pixels; an encapsulation layer; and a touch layer comprising touch traces, the touch traces being composed of a plurality of annular touch trace units. The orthographic projection of the touch trace unit onto the light-emitting layer is located between adjacent color filter units, and the inner circle of one touch trace unit is tangent to the outer circle of another adjacent touch trace unit, thereby electrically connecting the adjacent touch trace units. This disclosure sets the shape of the touch traces in the touch layer to annular touch trace units, reducing color separation phenomena caused by the light emitted by the pixels and avoiding abnormal light diffraction, thus ensuring a better overall display effect of the touch display panel.