170results about "Optical elements" patented technology

An optical scanning apparatus includes light sources, an aperture having, and coupling lenses. Numbers of the light sources and the coupling lenses are equal to each other and the apparatus satisfies an inequality 12.7 <(D×β₀×m₀×xdpi)/(2×NA) <38.1 and an equation β₀=(β₊−β₋)/(n−1), wherein D represents a width of the slit of the aperture, β₀represents a beam open angle, mo represents a total lateral magnification ratio, dpi represents a number of dots per inch, NA represents a numerical aperture, β₊ represents a positive open angle, β₋ represents a negative open angle, and n represents the number. Further, an image forming apparatus using this optical scanning apparatus and an image forming method are provided.

An image capturing apparatus includes an image capturing device that captures an image of light from a subject, the light passing through each of wavelength band filters having invisible wavelengths as passbands, in which parts of the passbands of the filters whose center wavelengths are adjacent to each other mutually overlap, and a control unit that causes the image capturing device to capture an image of the light from the subject on which a first irradiation light is irradiated, the first irradiation light having a first spectral distribution in which parts of the respective passbands of the filters overlap with one another, and causes the image capturing device to capture an image of the light from the subject on which a second irradiation light is irradiated, the second irradiation light having a second spectral distribution in which parts of the respective passbands of the filters overlap with one another.

The invention provides a high strength organic / inorganic nano composite film layer materials and method for preparation, wherein the composition comprises 10-13% of titanate, 7-17% of silicane coupling agent, 0-6% of silicate ester, 40-65% of alcohol solvent and 1-4% of water. The preparation of the composition consists of using inorganic acid as catalyst, co-hydrolyzing titanate, silicate and silane coupling agent in dimethyl carbinol, coating the obtained paint by rotary, dipping or spraying methods onto the surface of the appliances, finally solidifying 1-3 hours at 135- 150 deg. C.

The invention is directed to an optical system for a fundus camera for reflection-free opthalmoscopy having a beam path with refractive and reflective optical elements which are used substantially in common for illumination and observation or recording. An imaging mirror system substantially comprising a plurality of reflecting optical elements in the form of mirrors and is provided for illuminating and imaging the fundus. At least one optical element, for example, mirror, is formed as a freeform mirror with an imaging, reflecting freeform surface. The optical elements are arranged in a housing in a precisely defined position and attitude relative to one another in such a way that an imaging of the reflecting surfaces of the optical elements on the image of the imaged retina is prevented within a wide diopter range of the patient's eye to be examined.

A holographic display system provides a holographic image suitable for use as a nightlight in a dimly lit environment wherein the only light in the field of view of the user is essentially the light diffracted into the holographic image being replayed. The holographic display system includes a low watt light source, a hologram recorded with a reference beam matching the beam of the light source employed to replay the hologram, and an enclosing structure for holding the lightsource and hologram in registration wherein the enclosure is configured so that the only light emitted from the display system is emitted from the hologram.

The invention relates to an infrared spectrum enhancement and detection method and an infrared spectrum enhancement and detection device based on a graphene nano antenna. The device comprises a light source, a collimating lens, a one-point detector and an MEMS (micro-electromechanical system) grating light modulator based on the three-dimensional graphene nano antenna. Infrared light emitted from the light source is irradiated to the MEMS grating light modulator based on the three-dimensional graphene nano antenna through the collimating lens, an interference signal of the MEMS grating light modulator can be detected by the one-point detector, a detection signal is demodulated through Fourier transform, a spectrum is reproduced, and trace molecules are detected according to obtained spectrum information; the device has the advantages of good stability, high response speed, high sensitivity, dynamic tunable broadband, high enhancement factor and the like, can be expected to greatly increase the variety of substances detected by an infrared spectroscopic analysis technology and improve the detection sensitivity of the infrared spectroscopic analysis technology, and has a huge development space and a wide application prospect.

The invention discloses a naked 3D track display method and equipment. The method comprises the steps as follows: an image collector collects images of a viewer; an image processor determines the position of the viewer; according to the position of the viewer, a traversing module finds a liquid crystal grating state value corresponding to the position of the viewer, which is determined by the image processor from a index list corresponding to the position of the viewer, and the liquid crystal grating state value comprises a plurality of adjacent grating units and the driving manner of each of the plurality of adjacent grating units; a grating driving module finds the liquid crystal grating state value according to the traversing module to drive the liquid crystal gratings; and image information is displayed by a displaying screen. The invention further disclosed naked 3D track display equipment. According to the invention, a 3D display region can be regulated according to the spatial location of the viewer, so that the viewer can always senses a 3D displaying effect during motion.

The systems and methods described herein relate to solid-state light sources capable of generating radiation beams for, but not limited to, the treatment of surfaces, bulk materials, films, and coatings. The solid-state ultraviolet source optically combines the light output of at least two and preferably as many four independently controllable discrete solid-state light emitters to produce a light beam that has a controllable multi-wavelength spectrum over a wide range of wavelengths (i.e. deep UV to near-IR). Specific features of this light source permit changes in the spectral, spatial and temporal distribution of light for use in curing, surface modification and other applications.

A sliding-type portable communication apparatus includes a body housing; a sliding housing sliding on an upper surface of the body housing while being in contact with the body housing; first and second angled housings, each of the first angled housings extending from one corner of one side of the body housing in an inclined direction gradually going far from a lower surface of the sliding housing, each of the second angled housing having a first surface and a second surface, the first surface being in contact with the first angled housing while extending in the inclined direction, and the second surface being opposite to the first surface and in contact with the sliding housing; a pair of connecting arms, each of which extends from an end of one of the second angled housings in the inclined direction; and a rotatable lens housing disposed between the connecting arms and having a camera lens, the camera lens being oriented in a direction passing through the lower surface of the sliding housing when the sliding housing has not been moved a predetermined distance, and the camera lens being oriented in a direction passing through the upper surface of the body housing when the sliding housing has been moved.

A projection apparatus using a spatial light modulator (SLM), comprising the following: at least one variable light source, at least one spatial light modulator for modulating the illumination light emitted from the variable light source in accordance with the modulation state of arrayed pixel elements, a variable light source controller for controlling modulation of the variable light source, and a spatial light modulator controller for controlling modulation of each pixel element of the spatial light modulator, wherein the variable light source controller controls the variable light source so as to reduce the period in which the modulation states of the pixel element are in transition on a display image.

Thermographic imaging equipment is incorporated directly into cabinets housing electrical switchgear to provide for dedicated, nearly continuous monitoring of the contained equipment. A mechanical scanning technique may allow low-cost sensors to provide essentially continuous thermographic monitoring. Dedicated thermal imaging equipment allows automatic analysis through predefined temperature threshold maps.

Devices and methods for collimation of a penetrating radiation source, such as an x-ray source, for the purpose of creating a scanning beam, as might be employed for purposes of imaging. A first scanning element, constrained to move about a first axis, has at least one aperture for scanning radiation from inside the first scanning element to outside the first scanning element. A second scanning element constrained to move with respect to a second axis, typically identical to the first, has at least one aperture for scanning radiation that has been transmitted through the first scanning element across a region of an inspected object.

The invention provides a mixed-light-source liquid-crystal projection light engine system. The portable liquid-crystal projection light engine system is composed of a light source module, a polarized light management module, an image signal module and a projection lens, wherein the light source module consists of a high-brightness laser, an incoherent LED (Light-Emitting Diode) solid light source, a fluorescent device and the like. The output brightness of the projection system is greatly increased, the light source module is safe and environmentally friendly, and projected images have bright color and clear quality. The polarized light management module consists of a color-combining prism, a polarization beam splitter (PBS), a polarization color-combining device and the like, and different polarization states of three-primary-color mixed light are integrated into the same polarized light to be emitted to the image signal module. The image signal module is a monolithic reflection type liquid crystal light modulation device, and image signals are loaded to the three-primary-color polarized light in sequence according to the image signals corresponding to primary colors. The projection lens is used for projecting the light carrying the image signals onto a screen.

A self-adaptive optical system based on voltage decoupling controlled multiple wave-front correctors. The self-adaptive optical system based on the voltage decoupling controlled multiple wave-front correctors comprises a plurality of wave-front correctors, a spectroscope, a wave-front sensor and a wave-front processing machine; the plurality of wave-front correctors are distributed in an optical path in a series connection mode; the wave-front sensor and the wave-front corrector with the highest accuracy satisfy a conjugated relation; the wave-front corrector with the highest accuracy directly performs high-accuracy correction on wave aberrations through a slope method, other wave-front correctors perform voltage decoupling separation on low order wave-front aberrations according to a correction voltage decoupling algorithm of the wave-front corrector which is provided with the highest accuracy, perform type mold correction on specific aberration and directly perform correction on all aberrations through the slope method, finally the correction aberrations of every wave-front corrector are overlayed to achieve high accuracy correction of the overall aberrations. The self-adaptive optical system based on the voltage decoupling controlled multiple wave-front correctors is mainly applied to a light beam purification self-adaptive optical system and the optical fields which have severe aberration change and need a plurality of self-adaptive system combined correction such as correction of atmosphere turbulence and thermal blooming.

The invention discloses a column-shaped electromagnetic wave stealth device with four-direction stealth effects. The column-shaped electromagnetic wave stealth device with the four-direction stealth effects comprises four first medium units and four second medium units, wherein the first medium units and the second medium units are isotropic and are transparent relative to incident electromagnetic waves, the refractive index of each first medium unit is larger than the refractive index of each second medium unit, the first medium units are column bodies, the cross sections of the column bodies are of isosceles triangle shapes, the second medium units are column bodies, and the cross sections of the column bodies are of isosceles triangle shapes or isosceles trapezoid shapes. Each second medium unit is arranged between every two adjacent first medium unit, adjacent second side walls are opposite to first side walls, and all third side walls face a stealth area. When the cross sections of the second medium units are of the isosceles triangle shapes, all fourth side walls face background media. When the cross sections of the second medium units are of the isosceles trapezoid shapes, all sixth side walls face the ground media and all seventh side walls face the stealth area. The column-shaped electromagnetic wave stealth device has the stealth effects of four directions, is insensitive to the polarization direction of the electromagnetic waves, and is suitable for a whole electromagnetic wave section.

The invention provides a light source spectrum modulating device. The light source spectrum modulating device comprises a light source, a first collecting optical unit, a chromatic dispersion unit, a digital micromirror array, a second collecting optical unit and a light uniformly blending unit, wherein the first collecting optical unit is used for collecting the light irradiation of the light source; the chromatic dispersion unit is used for chromatically dispersing the light irradiation collected by the first collecting optical unit, and imaging; a digital micromirror array is formed on a focal surface of the chromatic dispersion unit and is used for controlling the overturning state of each micromirror in order to select different spectrum positions and spectrum bandwidths; the second collecting optical unit is used for collecting the light irradiation reflected by the digital micromirror array again and transferring the collected light irradiation into the light uniformly blending unit; and the light uniformly blending unit is used for blending and recombining the separated single-light irradiation. By adopting the light source spectrum modulating device, the light source spectrum can be distributed again, and the distribution characteristic of the light source spectrum can be changed; the light source spectrum modulating device can be applied to the field of calibrating of optical instruments and simulation test; and by adopting the technology provided by the invention, the calibrating precision of the optical instruments and the simulation test capacity can be improved.

A method for manufacturing a display device, having hollows containing fine particles, for displaying an image using the fine particles includes a step of packing a dispersion in the hollows, the dispersion containing the fine particles, a dispersion medium, and a precursor, dissolved or dispersed in the dispersion medium, for forming a sealing layer; a step of providing a support layer on partitions; a step of coating a face of the support layer and end portions of the partitions with the sealing layer precursor by allowing the face of the support layer and the end portions of the partitions to adsorb the sealing layer precursor, the face of the support layer and the end portions of the partitions being in contact with the dispersion; and a step of forming the sealing layer by subjecting the resulting sealing layer precursor to at least one of polymerization and cross-linking.

The invention relates to a bistable composite film of polymer dispersed liquid crystals and a manufacturing method thereof. The composite film is composed of two pieces of flexible transparent conducting film and a layer of polymer dispersed liquid crystals, wherein, the two pieces of flexible transparent conducting film are etched with a coplanar conversion electrode; the layer of polymer dispersed liquid crystals is highly active polyurethane acrylic ester; the liquid crystals are nematic phase liquid crystal molecules with large birefringence. When imposing a coplanar horizontal electric field, the bistable composite film of the polymer dispersed liquid crystals is in closed and scattering state and still keeps the scattering state after the electric field is eliminated; when imposing a coplanar comb-shaped electrode short-circuit on an opposite electric field, the bistable composite film of the polymer dispersed liquid crystals is in open and transparent state and still keeps the transparent state after the electric field is eliminated. The bistable composite film of the polymer dispersed liquid crystals has the manufacturing method that: after being mixed, the highly active polymer and the nematic phase liquid crystals with the large birefringence are separated to form the structure that the polymer wraps crystal liquid droplets. The invention uses the simple design proposal and depends on changing the direction of the electric field to realize zero field stability of the polymer dispersed liquid crystals so as to further acquire an electronic-paper technology with better energy conservation; or the bistable composite film of polymer dispersed liquid crystals can be specially applied to the fields of building decoration and jewelry counters and so on as a dimming function film which is clipped in glass.

The invention discloses a focal length adjusting apparatus for a VR device. The apparatus comprises a rotating wheel, a left cross-arm wheel, a right cross-arm wheel, a left folding-arm wheel, a right folding-arm wheel, a left vertical wheel arm and a right vertical wheel arm, wherein a wheel disc rotates the rotating wheel, the wheel disc drives the left cross-arm wheel and the right cross-arm wheel to rotate, the left cross-arm wheel and the right cross-arm wheel drive the left folding-arm wheel and the right folding-arm wheel to rotate, and the left folding-arm wheel and the right folding-arm wheel then respectively drive the left vertical wheel arm and the right vertical wheel arm to rotate in a vertical direction. Besides, the invention further provides a VR device. Back-and-forth adjustment of a front cover is realized through the focal length adjusting apparatus for the VR device. Compared to the prior art, the VR device provided by the invention is firm in structure, improves the internal structure of virtual reality goggles, saves space, reduces the volume, at the same time, also reduces the weight, and enables a user wearing the goggles to have better experience.

The present invention relates to a liquid crystal alignment layer composition showing excellent adhesive strength to a substrate and a liquid crystal layer and excellent homeotropic alignment of liquid crystals, a liquid crystal alignment layer prepared with the same, a preparation method of the liquid crystal alignment layer, an optical film including the liquid crystal alignment layer, and a display device including the same. According to the present invention, provided are a liquid crystal alignment layer composition which comprises 1-50 wt % of a photocurable resin binder, 0.01-5 wt % of an amine compound selected from the group consisting of primary and secondary amino-based coupling agents, 0.1-5 wt % of a photoinitiator, and the remainder solvent; a method for preparing a liquid crystal alignment layer by coating the substrate with the liquid crystal alignment layer composition, removing the solvent, and curing the liquid crystal alignment layer composition; an alignment layer which is prepared with the liquid crystal alignment layer composition of the present invention; an optical film which comprises the substrate, the alignment layer, and a liquid crystal layer formed on the alignment layer; and a display device including the optical film. The liquid crystal alignment layer formed with the liquid crystal alignment layer composition of the present invention has excellent adhesive strength to the substrate and to an upper liquid crystal layer, and provides excellent homeotropic alignment to liquid crystals. The optical film of the present invention can be applied to a polarizer by itself and can be very helpfully used as a retardation film or a view angle compensation film in various types of LCD modes such as IPS mode and the like.

Embodiments are directed towards a system for enabling a user to view an image on a surface. The system may include projector(s), sensor, projection surface or screen, and processor. The projectors may project light for an image onto the surface. The sensor may detect light reflected off the surface. The surface may include multiple types of surface elements, such as multiple first elements positioned as border of a display area on the surface to provide feedback regarding the surface and multiple second elements positioned within the border of the display area to reflect the image to the user. The processor may determine characteristics of the border of the display area based on light reflected to the sensor from first elements. And it may modify parameters of the image based on the characteristics of the border of the display area.

A backlight unit, comprising plural linear light sources, and an optical functional sheet, wherein a prism structure having plural prisms is formed on at least one surface of the optical functional sheet, and the values of (H_n−1+H_n)/(A_n−A_n−1) are approximately equivalent, wherein, in a brightness distribution graph that expresses a brightness distribution in the optical functional sheet, A₁ is a peak site and H₁ is a peak height of a first virtual image, A₂ is a peak site and H₂ is a peak height of a second virtual image adjacent to the first virtual image, . . . , A_n is a peak site and H_n is a peak height of (n)th virtual image adjacent to (n−1)th virtual image, and these virtual images are derived from the plural linear light sources.

The invention relates to a multi-focus array light spot generation device and method. The method comprises the following steps: S1) sending an arbitrarily-polarized laser beam; S2) converting the arbitrarily-polarized laser beam into a linearly-polarized laser beam; S3) carrying out collimation and beam expanding on the linearly-polarized laser beam; S4) carrying out phase modulation on the linearly-polarized laser beam obtained after collimation and beam expanding; S5) converting the linearly-polarized laser beam obtained after phase modulation into an azimuthally-polarized laser beam; and S6) focusing the azimuthally-polarized laser beam, and generating multi-focus array light spots in a focusing area, polarization direction and spatial position of each focus being arbitrarily adjustable. Compared with the prior art, the device and method can realize simultaneous adjustment of polarization direction and spatial position of each focus.

The invention discloses a rear naked-eye three-dimensional (3D) display and a display method. The rear naked-eye 3D display comprises an image display unit, an optical element and a backlight module, wherein the image display unit can provide a display panel of a fully-high-resolution parallax image; the optical element propagates backlight energy to different visual areas in space; and the backlight module is formed by combining a switch and small backlight units, and the brightness of each small backlight unit can be freely controlled. Light which is emitted by the backlight module passes through the optical element, penetrates through the image display unit and then is used for loading the parallax image, so different parallax images can be seen through eyes at different spatial positions, or different images can be seen at different viewpoints. Meanwhile, by controlling the specific brightness combination of the small backlight units in the backlight module, a high-resolution two-dimensional (2D) image can be played. By the invention, under the condition that 3D display is realized, adding of glasses is eliminated, the resolution of the display is prevented from being reduced, and 2D/3D bidirectional switching without resolution reduction is realized.

The invention relates to the technical field of fingerprint identification, and discloses a fingerprint identification sensor, a manufacturing method thereof and a display device so as to improve theproduct quality of the display device. The fingerprint identification sensor comprises a plurality of fingerprint identification units arranged in an array mode, and is characterized in that each fingerprint identification unit comprises a substrate base plate, an image acquisition device arranged at one side of the substrate base plate and a first grating structure and a second grating structurewhich are sequentially arranged at the other side of the substrate base plate, the first grating structure is provided with a first imaging hole opposite to image acquisition device in position, the second grating structure is provided with a second imaging hole opposite to the image acquisition device in position, and a slit extending direction of the first grating structure is perpendicular to the a slit extending direction of the second grating structure.