335results about How to "Eliminate chromatic aberration" patented technology

A new and unique LED-based floodlight is provided having an LED light module and a control module. In operation, the LED light module responses to one or more control signals from the control module, and provides an LED array of light having a broad beam pattern from side-to-side with a selected lamp color, brightness, or some combination thereof; while the control module responds to one or more user inputs from a user, and provides the one or more control signals for operating the LED array module in order to provide the LED array of light having the broad beam pattern from side-to-side with the selected lamp color, brightness, or some combination thereof. The broad beam pattern of the LED array of light effectively has a lumen output of about 200 lumens that is equivalent to a 35 watt halogen floodlight output of the same angle. The selected lamp color may include white, warm white, nav red, nav blue and a “bug” light, as well as other suitable lamp colors, while the selected brightness may include different dimming levels for setting the overall brightness of the LED-based floodlight.

The invention provides a test paper reading method and a test paper reading device, which can read dry chemical test paper strips, colloidal gold immunochromatograohic assay test paper strips/cards and rapid pesticide residue test cards, are easy to operate, need no extra detection instrument and equipment, can automatically judge and read the detection result by only acquiring corresponding developing pictures through electronic equipment such as computers or mobile phones, have reliable testing accuracy and are particularly suitable for personal and household wide application. The method comprises the following steps: A. acquiring images; B. processing the acquired images; C. performing negative and positive discrimination; and D. performing concentration conversion on a sample which is discriminated to be positive in the step C through a concentration-gray scale relation to obtain a concentration value of the to-be-tested paper card/strip. The device comprises a shell and a built-in standard gray scale strip, wherein the shell is provided with a standard gray scale strip display window and is also provided with a first card slot, a second card slot and a third card slot for arranging the colloidal gold card, the rapid pesticide residue test card and the dry chemical test paper respectively.

The invention discloses a multi-task deep convolutional neural network-based vehicle color identification system. The system comprises a high-definition camera mounted above lanes on a road, a trafficcloud server and a vehicle color visual detection subsystem; the vehicle color visual detection subsystem comprises a vehicle locating detection module, a license plate locating detection module, a license plate background color identification module, a color difference calculation module, a vehicle color correction module and a vehicle color identification module; the vehicle locating detectionmodule, the license plate locating detection module and the vehicle color identification module share a same Faster R-CNN deep convolutional neural network; by adopting the deep convolutional neural network, vehicles on the road are quickly segmented; license plates on the road are quickly segmented by further adopting the deep convolutional neural network through using vehicle images; and space position information of the vehicles and the license plates in a road image is given. The multi-task deep convolutional neural network-based vehicle color identification system provided by the invention is relatively high in detection precision and relatively high in robustness.

The invention relates to a waveguide display system for eliminating chromatic aberration and based on a holographic diffraction optical element. The waveguide display system comprises an input coupler, a waveguide and an output coupler. When color light is irradiated on a transmission-type plane grating serving as the input coupler after passing a collimating lens, the plane grating exerts the dispersion characteristic and disperses the light into the light waves in different colors, the light waves enter the waveguide by different angles, and then the light continues to be transmitted in the waveguide, and when the light is transmitted to a reflection-type volume grating serving as the output coupler, the light waves are modulated through the volume grating, the light waves in which dispersion occurs are reflected out of the waveguide in the same direction and enter the eyes of people, people can see color pictures with the eyes, and therefore the chromatic aberration can be eliminated. Meanwhile, according to the waveguide display system for eliminating chromatic aberration and based on the holographic diffraction optical element, the negative effects of reduction of diffraction efficiency, the increase of the size and the weight of the system and the like cannot be caused, and the waveguide display system can be widely applied to the field of display systems.

The invention discloses an eyepiece lens assembly and a head-mounted optical system. The eyepiece lens assembly comprises four lenses, namely, a first convex lens, a second convex lens, a third concave lens and a fourth concave lens, sequentially in the direction opposite to the light incidence direction, wherein the first convex lens comprises a first surface which is a plane as well as a second surface which is convex in the light incidence direction; the second convex lens comprises a third surface which is convex in the light outgoing direction as well as a fourth surface which is convex in the light incidence direction; the third concave lens comprises a fourth surface which is concave in the light outgoing direction as well as a fifth surface which is concave in the light incidence direction; the fourth concave lens comprises a sixth surface which is a plane as well as a seventh surface which is concave in the light incidence direction. The head-mounted optical system comprises a diaphragm, the eyepiece lens assembly and a micro display screen. The large-view-field, micro-display and high-image-quality head-mounted optical system is realized through reasonable configuration and model selection of the eyepiece lens assembly and the micro display screen, the viewing experience which is higher in quality and more comfortable is brought to a user, and the demand of the user is satisfied.

The present invention facilitates improvements in laser ablation of solid samples to be analyzed by an external inductively coupled plasma (ICP) emission spectrometer, ICP/mass-spectrometer (ICP-MS), or flowing afterglow (FAG) mass spectrometer (FAG-MS) for elemental analysis (ICP and ICP-MS) or molecular analysis (FAG-MS). A novel invention mirror-with-hole beam combiner eliminates chromatic aberration in the invention sample view and allows rad-hardening the laser ablation invention for use in a radiation hot cell for analysis of high activity nuclear waste. Many other novel invention rad-hardening attributes facilitate a comprehensive rad-hardened laser ablation system (the world's first). In other embodiments, invention novelties include unusually large homogeneous focused laser spot diameters, unusually long laser objective lens focal length, wide range operationally variable laser path length with built-in re-alignment, operationally variable demagnification ratio and diameter of the focused laser spot, the use of significantly higher powered SMR lasers in a large spot diameter to facilitate high sensitivity bulk analysis of solid samples, a demountable and gravitationally self-sealing stack assembly laser ablation cell, and the world's first auto-samplers (mechanized sample changers) for analytical laser ablation.

This invention is improved laser ablation of solid samples analyzed by inductively coupled plasma (ICP), ICP mass spectrometry, or flowing afterglow mass spectrometry. A mirror-with-hole eliminates chromatic aberration in sample viewing and allows rad-hardening for radiation hot cell analysis of nuclear waste. Other attributes facilitate comprehensively rad-hardened laser ablation. Additional improvements include large, homogeneous laser spots, long-focus objective lenses, variable laser path length with built-in re-alignment, variable demagnification ratio, higher powered SMR lasers with larger spots enabling sensitive bulk solids analysis, demountable gravitationally self sealing stack assembly sample ablation cells, and laser ablation sample changers.

A dual-display module has a first display, a second display opposing the first display, and a backlight module disposed between the first display and the second display. The backlight module has at least one tunable mirror sheet, whereby one side display can be on a mirror-like state at the same time when the other side display is in an active operation state.

An image-capturing device includes: an input unit that inputs a subject image formed by an optical system manifesting axial chromatic aberration as an input image; an edge detection unit that detects edges in the input image, each in correspondence to one of color components; a focus adjustment unit that executes focus adjustment for the optical system by detecting contrast differences of the edges corresponding to individual color components having been detected and then moving a focus adjustment lens included in the optical system; and a lens moving direction determining unit that determines a moving direction along which the focus adjustment lens is to move for purposes of focus adjustment based upon the edges corresponding to the individual color components having been detected and the axial chromatic aberration. The focus adjustment unit causes the focus adjustment lens to move along the moving direction determined by the lens moving direction determining unit.

The invention relates to a chromatography control method used in the low-speed printing process of an electronic shaft intaglio printing press, and belongs to the field of printing control. According to the method, a feedforward decoupling PD control algorithm is adopted, the bad influence of the pre-chromatography control amount on a subsequent color set is eliminated in the low-speed operating process, the response speed of the system is increased, and the chromatography precision of the system is improved. Meanwhile, the decoupling depth can be set, and the effectiveness of the decoupling algorithm is guaranteed by selecting an appropriate decoupling depth. The chromatography control method used in the low-speed printing process of the electronic shaft intaglio printing press can be widely applied to practical work, and a good effect is achieved.

The invention is phosphorus crown optical glass with a medium refractive index and a high Abbe number. The invention belongs to the technical field of optical glass. The invention mainly solves the problems of poor heat stability and increased production difficulties of current phosphate system glass. The invention is mainly characterized in that the glass comprises, by weight: 60-83% of Ba(PO3)2; 3-15% of Al(PO3)3; 0.5-5% of Al2O3; 3-10% of B2O3; 2-10% of La2O3; 0-5% of Gd2O3; 0-5% of Y2O3; 2.5-10% of Sigma (La2O3+Y2O3+Gd2O3); 0-2% of ZrO2; 3-10% of BaO; 0-10% of CaO; 0-10% of SrO; 3-10% of Sigma (CaO+SrO+BaO); 0-0.5% of Sb2O3. The invention has a refractive index of 1.59-1.62, an Abbe number of 63-69, a transition temperature of less than 610 DEG C, a specific gravity of 3.50-3.80 g/cm3, and a glass Dw of grade 1 determined according to 'GB/T17129-1997 determination method of optical glass chemical stability', also has the characteristics of low tinting strength, good stability, excellent process performance, and suitability for batch production, and is mainly used for removing chromatic aberration in lens groups so as to reach the purpose of chromatic aberration correction.

The invention provides a method for carrying out relative radiometric calibration on a CCD (Charge Coupled Device) image, which is used for carrying out relative radiometric calibration on an original image obtained through push broom of a one-dimensional CCD camera. The method comprises the following steps of step A testing radiometric calibration data (formula) of each detection unit of the one-dimensional CCD camera under different integrating sphere output radiances Lj and different integral times Tk by utilizing an integrating sphere method; step B computing a relative radiometric calibration coefficient of each detection unit by the radiometric calibration data (formula) of each detection unit of the one-dimensional CCD camera under different energy levels Lj and different integral times Tk through an improved relative radiometric calibration model through; and step C carrying out radiation intensity calibration on each pixel in the original image by utilizing the relative radiometric calibration coefficient of each detection unit corresponding to a pixel so as to obtain an image after relative radiometric calibration. According to the method, the problem of obvious chromatic aberration of a splicing image of the interior of the same flight strip and an adjacent flight strip, which is caused by the difference between the integral times during processing of an airway array CCD image, is avoided.

An LCD device comprises: a light irradiating portion; a microlens array having a plurality of microlenses for collecting light emitted from the light irradiating portion; and a liquid crystal panel having a plurality of unit pixels, each unit pixel matching with the plural microlenses, for displaying an image by passing light that has been collected into the microlens array through each unit pixel. According to this, a color degradation is reduced, a viewing angle is increased, a fabrication cost is reduced, and fabrication time is shortened.

The invention provides a method for carrying out image correction on remote sensing images. The method comprises the following steps of: obtaining a remote sensing image shot by a satellite which carries a CCD camera and an image parameter thereof, and obtaining parameters of the satellite which shoots the remote sensing image and the CCD camera; carrying out radiation correction on the image; carrying out statistic on a gray value difference between odd-even line data and removing an odd-even pixel difference; removing a color difference between CCD arrays so as to finally obtain a processedremote sensing image I1. The method carrying out image correction on remote sensing images is capable of effectively improving the image quality, effectively removing stripe noises and color differences in/between chips, improving the relative radiation correction precision of images, and carrying out complete, correct and object inspection on the image correction effect.

The invention discloses high-strength aluminum alloy for electronic equipment and a preparation and extrusion method of the high-strength aluminum alloy. The high-strength aluminum alloy is Al-Mg-Si-Cu series high-strength aluminum alloy. The preparation and extrusion method comprises the following steps: fusion and preparation of aluminum alloy solution, jetting and refining in a furnace, onlinegrain refinement, online twin-stage degassing filtering, semicontinuous casting, ingot casting homogenization, heating and extruding, online quenching, stretcher straightening and artificial ageing. According to the preparation and extrusion method, through optimizing design of constituent composition and the preparation and extrusion technology of aluminum alloy, the cleanliness and constituent uniformity of aluminum alloy are improved, so that the extruded aluminum alloy obtains tiny equiaxed grains with perfect recrystallization, the defects including bank mark, piebaldness and chromatic aberration of an oxidation film are eliminated, and the quality and yield of the oxidation film are improved and increased; and the extruded aluminum alloy is suitable for manufacturing the appearance structural component of portal electronic equipment and meets the light and thin design demands of the electronic equipment.

The invention discloses a design method for a pure medium electromagnetic lens based on a meta-surface. The method includes the following steps that firstly, according to medium materials of the lens and the wavelength of working electromagnetic waves, the relation between phase changes and medium thicknesses is obtained; secondly, according to requirements for the type and focal length of the lens (a convex lens or a concave lens or a reflecting mirror), needed distribution of phase jumps is worked out; thirdly, according to phase distribution requirements, the medium lens with the corresponding thickness is established in electromagnetic simulation software, is simulated and finely adjusted and then can be manufactured, wherein the phase distribution phi is obtained according to the requirement of the lens designed in the second step, distribution of the medium thicknesses is worked out, and modeling and simulating are conducted in the electromagnetic simulation software. The design method is simple and flexible; along with reduction of incidence wavelengths, the focal length of the lens will be increased; a lens set composed of the lens and a traditional lens can eliminate chromatic aberration.

The invention relates to a zoom lens, comprising a first lens group, a second lens group, a third lens group and a fourth lens group arranged in sequence from an object side to an image side, wherein, the second lens group is suitable to move between the first lens group and the third lens group, and the fourth lens group is suitable to move between the third lens group and the image side. In addition, the first lens group has positive refraction, and comprises at least one first composite lens. The second lens group has negative refraction, and comprises at least one second composite lens. Meanwhile, the second composite lens comprises at least one aspheric lens, wherein, the adhesive surface of one of the aspheric lens is a concave face, and the adhesive surface faces the object side. The third lens group has positive refraction, and comprises at least one aspheric lens. The fourth lens group has positive refraction, and comprises at least a pair of convex lenses and a third composite lens from the object side to the image side. The zoom lens has the advantages of high rate and compact size.

A wearable display system having a display panel for outputting a signal processed a predetermined way is provided. The system includes: at least one waveguide for guiding the propagation of at least one signal output from at least one display panel; a plurality of gratings for diffracting the at least one signal propagating through the at least one waveguide; and at least one magnifying lens movable along a lengh of the waveguide, for magnifying the at least one signal diffracted by the grating. According to the system, a more light weight and compact wearable display system can be realized by minimizing the number of optical components, and the complexity and cost in manufacturing a display system can be reduced. In addition, a display system can be produced on a large scale by incorporating a waveguide, gratings and an eyepiece into one single body, and further, chromatic aberration can be removed by conjugate gratings.

The invention discloses a backward elastic scattering spectral measurement analysis system and method for online detection of size distribution of small particles in a suspension. A linear array fiber probe and an off-axis parabolic reflector are used to construct a multi-angle spectral measurement system, and a spectral analysis method based on wavelet multi-scale analysis is utilized to provide quick and accurate acquisition for the size distribution of particles. The method may be used for real-time monitoring of the production of standard particle, detection of oil-in-water pollutants, granularity detection for milk products, study on particle structure in biological cells and the like. The system is simple, and analytical results are accurate.

The invention relates to an optical system, and discloses a compact type medium wave infrared dual-viewing-field optical system. The compact type medium wave infrared dual-viewing-field optical system comprises a front set lens and a rear set lens. The front set lens comprises a first lens (1). The rear set lens comprises a second lens (2) and a third lens (3). The first lens (1) is a positive lens. The second lens (2) is a negative lens. The third lens (3) is a positive lens. According to the rear set lens of the telephoto optical system, the negative lens (germanium) and the positive lens (silicon) are combined. After the combination, a chromatic value of the rear set lens is larger. Chromatic aberration generated by the front set lens of the telephoto system can be eliminated. The diameter of the rear set lens is greatly compressed. The weight of the lenses is reduced. According to the fact that the medium wave infrared dual-viewing-field refrigerating optical system is designed, a shoot-in and shoot-out mode is adopted, the effect of zoom of the viewing field is achieved, a structure is compact, weight is light, and manufacturability is good.

The invention relates to a long-wave long-focus uncooled thermalization-free infrared optical system, belonging to the technical field of optics. The optical system comprises an aperture diaphragm, a first lens, a second lens, a third lens and a fourth lens which are sequentially and axially arranged along a light incident direction, wherein the first lens, the second lens and the third lens forma converging group used for correcting primary aberration, the lenses are in a positive-negative-negative-positive symmetrical structure, the first face of the second lens is a rotating and symmetrical diffractive face, and thermal expansion coefficients of the optical elements and the structural materials of the four lens and the intervals and the curvature radii of the four lenses all satisfy aformula. By utilizing different temperature characteristics and linear expansion coefficients of various optical materials and combining with a lens cone material, the self adaptation to the environment is realized to realize a thermalization-free function, which can effectively simplify the structure of an optical machine, reduce system weight, shorten system volume and improve the imaging quality of the optical system in different temperature environments.

Provided is a touch screen. The touch screen comprises base material, an anti-reflective film and a conductive layer, all of which are overlapped in order. The anti-reflective film comprises at least one layer with high refractive index and at least one layer of low refractive index, all of which are laminated in an alternating mode. Due to the structure of the anti-reflective film between the base material and the conductive layer, OCA/ITO and OCA/PET interfaces are avoided so that reflection is effectively reduced. The anti-reflective film comprises at least one layer with high refractive index and at least one layer of low refractive index, all of which are laminated in an alternating mode. Therefore, light transmission of the conductive layer is improved so that reflection of a visible region of the touch screen is further and effectively reduced. The color difference between the visible region and the non-visible region is eliminated so that display quality is improved. At the same time, the invention provides a manufacture method of the touch screen.

The invention discloses a fine equiaxed grain Al-Zn-Mg series aluminum alloy and a preparation method thereof. The aluminum alloy comprises elements Zn, Mg, Cu, Ti, B, and the balance Al and inevitable impurity elements. The preparation method comprises the steps of preparing materials, smelting aluminum alloy, spray blowing refining in a furnace, online grain refining, online degassing filtering,semicontinuous casting, ingot casting homogenizing, heating and extruding, online quenching and manual ageing treatment. According to the fine equiaxed grain Al-Zn-Mg series aluminum alloy and the preparation method thereof, the components of the alloy and the preparation technology parameters are optimally designed, so that an Al-Zn-Mg series aluminum alloy extruding material gains a completely-recrystallized fine and uniform equiaxed grain structure; the structure stripes and color difference of an oxide film are removed, and thus the quality of the oxide film of the Al-Zn-Mg series aluminum alloy can be improved; the oxide film is uniform in color, fine in texture, high in glossiness, outstanding in coloring effect, and applicable to manufacturing of various aluminum alloy sheets or tube-bar sections with high requirements on intensity and surface decoration, such as housings, intermediate frames and side frames of various large-screen electronic products.