168 results about "Visible band" patented technology

An ultraviolet laser apparatus having a single-wavelength oscillating laser generating laser light between an infrared band and a visible band, an optical amplifier for amplifying the laser light, and a wavelength converting portion converting the amplified laser light into ultraviolet light using a non-linear optical crystal. An exposure apparatus transfers a pattern image of a mask onto a substrate and includes a light source having a laser apparatus emitting laser light having a single wavelength, a first fiber optical amplifier for amplifying the laser light, a light dividing device for dividing or branching the amplified laser light into plural lights, and second fiber optical amplifiers for amplifying the plural divided or branched lights, respectively, and a transmission optical system for transmitting the laser light emitted from the light source to the exposure apparatus.

The invention provides an ink jet printing apparatus which can prevent unwanted visible bands or stripes from appearing in a printed image. For this purpose, this invention performs a nozzle information generation step for generating nozzle information representing an ejection characteristic of each nozzle, according to a landing state on a print medium of an ink droplet ejected from each nozzle of the print head; an estimation step for estimating, based on the generated nozzle information and the print data, an effect that the ink droplet ejected from each nozzle has on the image to be formed; a correction information generation step for generating correction information to correct an ink ejection condition of each nozzle according to a result of estimation by the estimation step; and a control step for controlling a driving of the nozzles according to the correction information.

The invention provides a metasurface lens, including a plurality of sub-structures. Each sub-structure comprises a microstructure and a partial substrate supporting the microstructure. Sizes of each sub-structure on any direction are the same. The partial substrates of all sub-structures form a substrate of the metasurface lens. The microstructures of all sub-structures form a microstructure arrayof the metasurface lens. Phase corresponding to the central position of each microstructure included in the microstructure array can be determined by incident light wavelength, metasurface lens focallength, and projection distances of the center of the microstructure and the center of the metasurface lens on a phase modulation direction. The lens can effectively improve focusing efficiency of incident light in visible bands.

A form birefringence to compensate the phase retardation caused by a liquid crystal device has a retardation compensation film that is composed of alternately deposited high and low refractive index layers. The retardation compensation film is provided in at least one of the incident side and the emanation side of the liquid crystal device. The birefringence value Deltan and the total thickness d of the retardation compensation film are adjusted such that the retardation of the retardation compensation film agrees with the retardation of the liquid crystal device at least at one wavelength in the visible band.

An image sensor includes both visible pixels and infrared pixels. The visible pixels produce signals indicative of light within a visible band received by the visible pixels, and the infrared pixels produce signals indicative of light within an infrared band received by the infrared pixels. A selective infrared (SIR) filter array is integrated on the image sensor. The SIR filter array includes SIR pixel filters that are positioned to filter out light within the infrared band propagating to the visible pixels. In this way, infrared crosstalk to the visible pixels can be reduced.

A temporary visible image, such as a first down reference line, corporate logo, or text is projected onto a target surface by an orientation-stabilized, fiber-fed laser projector. The projector may include at least one cylindrical lens or at least one pair of X-Y scanners. One or more remotely located lasers, supplying optical energy at a single wavelength to the projector, accommodate projection of a monochromatic line pattern. Multi-colored images are accommodated by supplying, to the projector, the output of a plurality of lasers operating at different wavelengths within the visible band. The projector is suspended and conveyed as a unitary assembly by a suspension system adapted to maintain the projectors angular orientation and dynamically stabilize the image. If desired, two or more independently-suspended projection modules or groups of modules adapted to move in unison or independently over the length of the field may be employed.

A dual purpose iris and color camera system is described provides good iris and color image capture in either IR or visible bands depending upon which type of image is being captured at that moment. For iris imaging the iris camera is capable of imaging in the 700 to 900 nm wavelength range where the iris structure becomes visible. The iris camera is able to perform iris imaging outside with full sunlight. The iris camera requires only a low level of cooperation from the user, in that they must be within a range of distances away from the iris camera, must hold relatively still for a short period of time, and must face towards the camera. The iris capture process is fully automated once activated.

A quantum nanodot camera, comprising: a quantum nanodot camera sensor including: at least one visible pixel sensor configured to capture scenes including actors and/or objects in a visible band; and at least one IR pixel sensor configured to capture motions of at least one quantum nanodot (QD) marker tuned to emit a narrowband IR signal.

A lens compound for connecting to an interchangeable lens mount of a digital camera having a single image sensor, the lens compound including a body; a single mount connecting ring mounted on the body for connecting to the lens mount of the digital camera; at least two lenses of substantially identical focal length mounted in the body; and a different single or multi bandpass filter associated with each of the lenses, allowing the passage of at least one visible band and one non-visible band, selected from the group consisting of near infra-red bands and ultra violet bands of light, through the filters to the sensor; wherein the lenses are of substantially identical field of view and substantially identical image circle at a sensor plane of the image sensor.

The invention discloses a sub-wavelength buried type grating structure polaroid sheet which comprises a transparent substrate, a medium grating, a first metal layer and a second metal layer; wherein, the medium grating is provided with ridges and grooves, and the ridges and the grooves are periodically and alternately arranged; the first metal layer is covered on the spines of the medium grating; the second metal grating is covered on the grooves of the medium grating; and the period of the medium grating is smaller than the wavelength of incident light. The polaroid sheet is characterized in that the upper surfaces of the top parts of the first metal layer and the second metal layer are covered with medium covering layers, a high refractive index medium layer is arranged between the transparent substrate and the medium grating, and the refractive index of the high refractive index medium layer is between the range of 1.6 to 2.4. The medium covering layers can modulate the transmission efficiency of the polaroid sheet as well as protect the metal layers so as to prevent the metal layers from being oxidized and damaged in assembly. The polaroid sheet has high transmission efficiency, high extinction ratio and wide range of incident angles at the whole visible band.

A device and method simultaneously detects and enumerates two groups of microorganisms in a test sample, utilizing a single test container. In the container liquid growth media, a chromogenic substrate and a fluorogenic substrate are mixed with the test sample. The test container is incubated to allow bacterial growth and metabolism. Spectral changes of the substrates are dynamically detected using two external light sources aimed at a transparent section of the test container, and a single external photo detector. One light source operates in the visible band and the second in the long ultraviolet band. The two dynamic time patterns generated by the two substrates are analyzed in real time to determine the presence or absence of each microorganisms group and to enumerate their original concentrations in the test sample.

The invention discloses a single particle surface plasmon electrooptical modulator and a manufacturing method thereof. The electrooptical modulator realizes active modulation on scattering light intensity in a visible band. The electrooptical modulator comprises a bottom electrode, a conductive substrate, an insulating layer, and a monolayer transition metal chalcogenide. The monolayer transitionmetal chalcogenide has a metal nano structure and a top electrode which are far away from each other. The bottom electrode and the top electrode are connected with external modulating voltage, to forman anode and a cathode of the electrooptical modulator. The anode and the cathode are isolated by an insulating layer, to form a plate capacitor structure. When the external modulating voltage is applied, Fermi level of the transition metal chalcogenide moves to change optical properties of the transition metal chalcogenide, and coupling strength of the transition metal chalcogenide and the metalnano structure changes therewith, so that modulation on a scattered optical field is realized. The electrooptical modulator is the first electrooptical modulator which realizes optical field modulation on a nanoscale, and the electrooptical modulator operates in a visible band, and is characterized by high stability and fast response speed.

Methods for imaging regular patterns are provided. A multi-channel imaging head is configured in accordance with the repeat of a pre-determined regular pattern such that no swath boundaries appear within the visibly imaged features of the pattern. The imaged articles have reduced visible banding due to the elimination of swath boundaries in the imaged features.

The invention discloses a nano noble metal modified Ag/MXene/TiO2 composite material and a preparation method thereof. The preparation method comprises the following steps: firstly, preparing a two-dimensional lamellar material MXene with a good lamellar structure; ultrasonically and uniformly dispersing MXene into an AgNO3 aqueous solution; then adding a formaldehyde aqueous solution containingstannous chloride (SnCl2) and trifluoroacetic acid (CF3COOH) to obtain an MXene composite material with uniformly distributed nano-Ag, and finally, separating out TiO2 sheets on the surface of the MXene by adopting a hydrothermal method to obtain the nano-Ag modified MXene/TiO2 composite material. The nano Ag and TiO2 sheets in the composite material are uniformly dispersed, the proportion of thenano Ag and TiO2 sheets is adjustable, and the photocatalytic performance of the composite material is greatly improved compared with that of commercial TiO2(P25). The addition of nano Ag enhances theabsorption of the composite material in a visible band, and the Ag/MXene/TiO2 ternary composite material has potential application in the field of photoelectrocatalysis as a catalyst material.

The invention discloses a color vision correcting lens, color vision correcting equipment and a manufacturing method of the color vision correcting lens. The color vision correcting lens comprises a lens body, wherein an all-dielectric multilayer membrane pack with a selective spectrum transmission cutting-off feature is deposited on the front side of the lens body, a visible-band broadband antireflection multilayer membrane pack is deposited at the back of the lens body, the transmission of the band of 545-555 nanometers is not larger than 1%, the transmission of the band of 435-450 nanometers is 15-25%, and the transmission of the band of 640-655 nanometers is 25-35%. The color vision correcting lens has the advantages that appropriate high-refraction-index and low-refraction-index membrane design is selected, transmission is allowed to be cut off at specific bands while rest visible bands can transmit without obstruction, all environment representation information, brightness information and rich color information are obtained, the color vision abnormality of target groups is weakened greatly, and the quality and satisfaction of learning, work and life of the target groups are increased; the color vision correcting lens is compact in structure, simple to manufacture, low in cost and convenient in large-scale production.

The embodiment of the invention provides a pixel communication method, which comprises the following steps: acquiring information to be sent, encoding the information to be sent and packaging the information into at least one data frame; converting the data frame into a plurality of frame image information composed of pixel points, constructing video information through the frame image information, and sending the video information to a receiving end in the form of visible light; wherein the video information is transmitted through a luminous pixel point in a screen or a projected image as anoptical signal transmitting end, and the receiving end receives the video information through a camera. The method provided by the invention, in this way, a message to be transmitted is converted intovideo message and projected onto a screen, communication in the visible band can transmit a rich variety of information, not limited and affected by the Internet signal coverage environment, can alleviate the depletion of spectrum resources of mobile communications, and based on the highly directional characteristics of the short-wave spectrum of visible light, can be applied in the electromagnetic sensitive environment.

Three retardation compensators are provided for compensating the retardation of liquid crystal devices for red, green and blue light, respectively. Each of the retardation compensators is composed of plural high and low refractive index thin film layers alternately layered on a substrate. Because of the difference in the wavelength dependences of the liquid crystal device and the retardation compensator, the retardation R2 of the retardation compensator becomes much larger than the retardation R1 of the liquid crystal device in short wavelength region of the visible band. In order to match the retardation, the thickness of the retardation compensator for blue light is smaller than those for red and green light.

The invention discloses a visible-band multi-wavelength adjustable solid-state Raman laser, which belongs to the field of lasers. The visible-band multi-wavelength adjustable solid-state Raman laser is characterized by sequentially comprising a pumping source LD, a 1-3at.% doped self-Raman crystal, a BBO crystal and a concave mirror OC, wherein a high-reflectivity coating film at the pumping end of the self-Raman crystal and the OC mirror together form a self-Raman resonant cavity, thereby realizing simultaneous lasing of a fundamental frequency light and a cascade Stokes light; through adjusting a phase matching angle of the BBO crystal, intracavity frequency doubling or sum frequency is carried out on a specific wavelength combination selectively, thereby realizing output of different visible wavelengths. Output of multiple visible wavelengths is realized in one laser according to needs, material adaptability for systems such as laser processing, precise measurement and a Raman spectrometer is effectively expanded, problems of large size and high cost caused as one machine drives multiple different laser sources in the prior art can be solved, and a technical foundation is laid for truly realizing one machine with multiple abilities.

The invention provides a near-eye display device, which includes a planar waveguide array display device, an infrared emitting device, an infrared camera module and an infrared reflection and diffraction element capable of converting plane waves into spherical waves. The planar waveguide array display device includes a display output light group, a light guide substrate and at least one inclined coupling surface. The inclined coupling surface is covered with a spectroscopic film that is transparent and reflective to the visible light band. The infrared reflective diffraction element is arranged on the side of the light guide substrate close to the human eye or away from the human eye. The reflected and outgoing optical axis of the infrared reflective diffraction element is substantially parallel or coaxial with the optical axis of the infrared camera module. The infrared light emitted by the infrared emitting device covers the range of the human eye, and the infrared light reflected by the human eye is reflected and diffracted by the infrared reflection diffraction element, and the virtual image of the human eye formed by the infrared camera module is captured. The near-eye display device can obtain a clear ortho-eye image without directly facing the human eyes, does not interfere with the visual effect of the user viewing a virtual picture, and can be used for eyeball tracking, iris recognition, and the like.

The invention discloses an absorbing film structure based on visible band to near-infrared band. The absorbing film structure is characterized in that a metal film layer and a dielectric film layer successively grow on any substrate by gas phase deposition and liquid phase deposition, and then an unordered metal particle distribution layer grows on the dielectric film layer by gas phase deposition or a combination of gas phase deposition and an annealing process, wherein the thickness of the metal film layer is 80nm-1micron, the thickness of the dielectric film layer is 1nm-200nm, the average height of an equivalent film layer in the unordered metal particle distribution layer is 5nm-100nm, the average size of particles is 10nm-200nm, and the surface coverage rate of metal particles is 3%-90%. Therefore, the absorbing film structure based on visible band to near-infrared band has a near perfect absorbing characteristic that the absorptivity within visible band to near-infrared band achieves 99%. The absorbing film structure provided by the invention has the advantages that the technology is simple, the cost is low, the modification is not sensitive, the angle is not sensitive, the controllability is good, the coordination is high, the absorbing film structure can grow in a large area manner and has no requirement on a substrate, and the nanometer process technology is ripe.

The invention discloses an aluminum-silver multilayer broadband reflection film based on an aluminum oxide interlayer and belongs to the technical field of thin film deposition. The aluminum-silver multilayer broadband reflection film solves the problems that in the prior art, an aluminum film is low in reflectivity at the visible band, a silver film is low in reflectivity at the ultraviolet band, and the environmental adaptability is poor. The aluminum-silver multilayer broadband reflection film comprises a substrate, a first aluminum oxide film, a first aluminum film, a second aluminum oxide film, a first silver film, a third aluminum oxide film, a second aluminum film, a fourth aluminum oxide film, a second silver film and a fifth aluminum oxide film, wherein the substrate, the first aluminum oxide film, the first aluminum film, the second aluminum oxide film, the first silver film, the third aluminum oxide film, the second aluminum film, the fourth aluminum oxide film, the second silver film and the fifth aluminum oxide film are arranged compactly in sequence from bottom to top, cover the ultraviolet band, the visible band and the infrared band and all have high reflectivity; besides, the aluminum-silver multilayer broadband reflection film has good neutral performance even used at a large angle and also has good environmental adaptability.