177 results about "Optical quality" patented technology

The invention discloses an integrated injection molding method for transparent and opaque materials of an automobile lampshade, and aims to solve the problems of infirm interface bonding, low production efficiency and unstable product quality in the prior art. The method comprises the steps of material pretreatment, staged injection molding, interface fusion enhancement, gradient cooling and the like. By optimizing temperature control, viscosity matching and compatilizer adding, efficient fusion of a transparent material and an opaque material is achieved, and the mechanical performance and optical quality of a product are improved. The method is simple in process, high in production efficiency and suitable for large-scale production of automobile lampshades, and has wide application prospects.

Methods for actively managing remnant voltage on backplane electrodes when driving an electrophoretic display, especially with short waveforms, such as used for scrolling, pinch-zoom, pulldown menus, and even video. The methods track the remnant voltage changes for each backplane electrode during a series of image updates and use same color transitions to either improve the optical quality state of the display pixel or to decrease the remnant voltage at the display pixel. Thus, it is not necessary to employ full reset pulses, which typically drive a backplane electrode to both extreme voltage states and appear very “flashy” to a user.

An electroactive lens with raised resistive bridges is disclosed. The resistive bridges can connect many ring electrodes in an electroactive lens with a relatively small number of bus lines. These resistors are typically large to prevent excessive current consumption. Typically, they are placed in the same plane as the ring electrodes, which means that the ring electrodes are further apart or made discontinuous to accommodate the resistors. But further separating the ring electrodes or making them discontinuous degrades the optical quality of the lens. Placing the ring electrodes and resistors on layers separated by an insulator allows the ring electrodes to be closer together and continuous and have a high enough resistance to limit current consumption. It also relaxes the constraints on feature size and placement during processing to make the lens. And because the resistors and electrodes are on different planes, they can be formed of materials with different resistivities.

The invention discloses a one-kiln two-line production process for energy-saving glass, and relates to the technical field of energy-saving glass plate production. A shunting pressure stabilizing chamber, a central partition wall and an electromagnetic-platinum combined stirring device are arranged at the tail end of a melting furnace, and are matched with prolonging of clarification residence time and a microbubble bubbling device, so that a highly uniform temperature field and component distribution can be obtained before molten glass enters a feeding channel, and bubbles and inclusions are fully eliminated. By means of the collaborative measure, the melt cleanliness is remarkably improved, optical defects such as stripes, stones and white points in the subsequent forming process are greatly reduced, and the appearance and the physical strength of a finished product are more reliable. By means of the Y-shaped double feeding channels and the independent temperature control tin bath, ultra-thin glass and medium-thickness glass can be produced at the same time in the same melting furnace and do not interfere with each other. The main line focuses on the flatness and the optical quality of the energy-saving glass of the building curtain wall, and the branch line focuses on the thickness control and the surface smoothness of the ultrathin energy-saving glass.

The utility model relates to a two-shaft rotating motor framework for improving optical quality. The two-shaft rotating motor framework comprises a base, a first prism support, a first driving part, a second prism support and a second driving part, the first prism support is matched with the first fulcrum element through the first supporting groove so that the first prism can be rapidly installed and positioned, and meanwhile the rotation precision and stability of the first prism support are guaranteed. Through the arrangement of the first plane, the installation distance between the first plane and the third magnet is closer, so that the stronger suction force between the first fulcrum element and the third magnet is ensured, and the degree of freedom of the prism in the non-required movement direction is favorably limited; furthermore, the space occupation of the prism module formed by the first prism support and the second prism support in the Y direction can be reduced, and miniaturization of the voice coil motor is facilitated.

The invention relates to a method for optical quality control (Q) during the manufacture (1) of circuit boards (L), comprising: capturing (S3) an image (P1) of a circuit board (L); determining (S4) a first defect indicator (F1) by means of optical image processing on the basis of the captured image; determining (S5) a second defect indicator (F2) by means of a trained adaptive algorithm (ML) on the basis of the captured image (P1), wherein, if the first defect indicator (F1) determined by means of the optical image processing (OR) indicates that the circuit board (L) is defective (S41), the second defect indicator (F2) is determined by means of the trained adaptive algorithm (ML) (S5); outputting (S6) the second defect indicator (F2) instead of the first defect indicator (F1) as the result of the quality control (Q).

The invention provides a diamond substrate screening method, which can be applied to the technical field of single crystal diamond material preparation, and comprises the following steps: carrying out crystal quality screening on diamond substrates, and selecting substrates meeting preset crystal quality to obtain a first screened substrate; performing stress state screening on the first screening substrate, and selecting a substrate meeting a preset stress state to obtain a second screening substrate; performing optical quality screening on the second screening substrate, and selecting a substrate meeting the preset optical quality to obtain a third screening substrate; performing surface quality screening on the third screening substrate, and selecting the substrate meeting the preset surface quality to obtain a fourth screening substrate; and crystal face deviation angle screening is conducted on the fourth screening substrate, the substrate meeting the preset crystal face deviation angle is selected, the target diamond substrate is obtained, and screening is completed. The epitaxial crystal quality of the CVD monocrystal diamond is improved by comprehensively evaluating substrate attributes such as crystal quality, stress state, defect distribution and surface quality.

The invention discloses a method for preparing high-transparency yttrium iron garnet ceramic by combining a chemical synthesis way with pressureless sintering. The method comprises the following steps: synthesizing submicron alpha-iron oxide powder; forming the powder; and carrying out pressureless sintering in an oxygen atmosphere. The YIG transparent ceramic prepared in the invention has very high transmittance (the highest transmittance is 40% at 1.5 m) in an infrared band, and the YIG transparent ceramic with high optical quality (the transmittance is as high as 75% at 1.5 m) can be obtained by combining oxygen hot isostatic pressing sintering. And the preparation process is simple, the synthesis conditions are easy to control, the material synthesis period is short, energy and cost are saved, and the requirements of industrial production are met.

The invention discloses a method for preparing YAG transparent ceramic by two-step sintering, which comprises the following steps: 1) weighing yttrium oxide powder and aluminum oxide powder according to a stoichiometric ratio, mixing, and carrying out solid-phase reaction to synthesize YAG powder; 2) performing dry grinding and wet grinding on the obtained YAG powder to obtain mixed slurry; 3) drying the obtained mixed slurry to obtain powder, and performing compression molding and cold isostatic pressing to obtain a ceramic biscuit; and 4) pre-sintering the obtained ceramic biscuit in an oxygen-containing atmosphere, embedding the pre-sintered ceramic with oxide particles, and carrying out hot isostatic pressing sintering to prepare the YAG transparent ceramic. On the basis of obtaining the YAG transparent ceramic with high optical quality, a microstructure with a fine grain size can be obtained, and good mechanical properties are considered; the preparation method is simple, the equipment cost and energy consumption are low, the traditional annealing step can be omitted, and a new thought can be provided for preparation of the high-performance YAG transparent ceramic.

This invention belongs to the field of optical glass manufacturing technology. It provides a dynamic optimization control method for furnace parameters in continuous melting of optical glass, comprising: analyzing the mapping relationship between kiln pressure and spurious liquid level responses based on historical and step test data, determining dynamic critical thresholds for each operating condition, and constructing a decoupling discrimination criterion library. Secondly, monitoring kiln pressure and liquid level, when exceeding the threshold, using multi-source sensors and time-series correlation analysis, distinguishing between spurious and real fluctuations, and outputting the true liquid level change. Then, analyzing the mapping law between liquid level deviation and adjustment parameters, forming a matching rule library of operating conditions, liquid level ranges, and adjustment strategies. Finally, constructing a coupled model of adjustment amount and liquid level change based on random forest, inputting the true liquid level change, and outputting the target value of the adjustment parameter. This invention achieves accurate online distinction between spurious and real fluctuations, avoids erroneous adjustments during material feeding, and improves liquid level control accuracy and product optical quality.

The utility model discloses high-precision transfer printing mould pressing equipment for an optical lens, which belongs to the technical field of optical lens processing and comprises a base, an upper mould is slidably connected to the upper surface of the base, a workbench is fixedly connected to the upper surface of the base, and a control console is fixedly connected to the lower end of the right side of the base. The upper end of the rear side of the base is fixedly connected with a motor; the output end of the motor is fixedly connected with a rotating shaft, the rotating shaft is rotationally arranged in the upper mold, and the front side of the upper end of the base is fixedly connected with a fixing plate; a limiting rod is fixedly connected into the fixing plate, and the limiting rod is connected with a connecting rod in a sliding and penetrating mode. According to the high-precision transfer printing mold pressing equipment for the optical lens, through arrangement of the sweeping strip and the moving plate, residues of chippings on the surface of the workbench are reduced, the purity and optical quality of the lens are guaranteed, the yield of products is improved, abrasion of the chippings to the equipment is reduced, the service life of a mold is prolonged, and the maintenance cost and downtime of the equipment are reduced.

Methods and systems for measuring the optical quality of an eye based on laser ray tracing are provided herein. Generally, the method uses the steps of temporally detecting the human eye with one or more laser beams in a set of points within the pupil of the eye, detecting projections of the laser beams reflected and scattered from the retina, and processing an image of the detected laser spots. In one embodiment, the components of the system include, but are not limited to, a laser having a dual-axis acousto-optic deflector and a dual-output generator of a digitally synthesized sinusoidal voltage, a collimating optical system, a conjugate telescope system, a polarizing beam splitter, and first and second photosensitive detectors, each component being in operable communication with a processing unit. Another embodiment uses a multi-laser block that does not require laser beam scanning.

The invention discloses a low infrared absorption coefficient Y2O3 transparent ceramic and a preparation method thereof, and the preparation method comprises the following steps: carrying out dry pressing molding on Y2O3 powder, and carrying out cold isostatic pressing treatment to obtain a ceramic biscuit; the ceramic biscuit is subjected to glue discharging at the temperature of 600-1250 DEG C; carrying out vacuum heat treatment on the biscuit subjected to glue removal under the conditions that the vacuum degree is less than or equal to 10 Pa and the temperature is 400-1550 DEG C so as to remove residual hydroxyl; pre-burning the sample subjected to vacuum heat treatment in air or oxygen; and carrying out hot isostatic pressing sintering on the pre-sintered sample to realize ceramic densification so as to obtain the Y2O3 transparent ceramic. By adopting the preparation method disclosed by the invention, an expensive high-vacuum sintering furnace does not need to be arranged, and pre-sintering of the Y2O3 transparent ceramic can be completed by using a simple atmosphere sintering furnace, so that the Y2O3 transparent ceramic with high optical quality is obtained.

In an aspect of the present invention, a new active optic is provided, namely, a photo-magnetically actuated deformable mirror (PMADM) made of a magnetic composite structure and an optical quality substrate layer. The magnetic layer is composed of Polydimethylsiloxane (PDMS) and powdered ferromagnetic CrO2. A magnet may be used to deform the mirror surface. The powdered CrO2 has a low Curie temperature (preferably around 395 K) which allows changing the magnetization of the magnetic layer using a laser heating source, thus providing control over the deformation. In one embodiment, the structure has an overall dimension of 1.2 inch 1.2 inch 175 μm with an optical pupil diameter of 8 mm. The PMADM is estimated to deform to a maximum stroke of 8.7731 μm before failure with a 3 safety factor.

To provide optical-quality mirrors having an energetically bonded oleophobic / hydrophobic (O / H) coating, and methods of manufacturing and using such coatings and mirrors.SOLUTION: An O / H coating is a thin-film coating that causes water and oil to form beads and become easily removable from a mirror surface, and thus improves cleanability, contamination resistance, and usable life of a mirror.SELECTED DRAWING: Figure 2A

This invention relates to a method for characterizing an optical lens, the method comprising the steps of: measuring the optical transfer function (OTF) of an optical objective lens for at least one of the following illumination types: green light, blue light, and red light; and, for at least one of the illumination types: comparing the measured OTF with at least one predetermined threshold OTF to determine whether the optical quality of the lens is satisfactory. The invention also relates to a system for implementing this characterization method for characterizing optical objectives, and a method and system for manufacturing optical objectives for implementing this characterization method and system.

Optical-quality mirrors having an energetically bonded oleophobic / hydrophobic (O / H) coating are provided, as are methods for making and using such coatings and mirrors. The O / H coating is a thin-film coating that causes water and oils to form beads and become easily removable from the mirror surface, and thus improves the cleanability, contamination resistance, and usable life of the mirror.

The invention discloses an optical lens which sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side. An optical axis region forming the object side surface of the first lens is a concave surface, the second lens has a positive refractive index, a circumferential region forming the image side surface of the second lens is a convex surface, an optical axis region forming the image side surface of the fourth lens is a concave surface, an optical axis region forming the image side surface of the fifth lens is a convex surface, and at least two conditional expressions are met. Therefore, the optical lens provided by the invention has the advantages of reduced overall volume, large field angle and excellent optical quality.

The application discloses a two-dimensional material growth method based on countercurrent non-metal source supply, and belongs to the technical field of two-dimensional materials. In the preparation, a non-metal source is placed in a single-port quartz test tube and arranged downstream of a tube furnace by using countercurrent supply of a chemical vapor deposition system. After the non-metal source is gasified at high temperature, the non-metal source is diffused to the surface of a substrate by using a concentration gradient, and the flow rate of a carrier gas can be regulated to regulate the non-metal source gas phase concentration on the surface of the substrate. Compared with a conventional chemical vapor deposition method, the method solves the problems of surface "deactivation" of a metal source and substrate pollution caused by diffusion of the non-metal source to the metal source and the substrate before the growth process. The preparation method provided by the application has strong controllability, the morphology, domain size and optical quality of the obtained two-dimensional transition metal chalcogenide are uniform, and the two-dimensional transition metal chalcogenide has excellent optical and electrical properties and wide application prospect.

The invention discloses a preparation method of a cladding laser single-crystal optical fiber, which comprises the following steps of: punching a central axis of a single-crystal crystal bar by adopting a punching technology, and punching the central axis of the single-crystal crystal bar to obtain a single-crystal optical fiber cladding; the method comprises the following steps: vertically inserting a single-crystal optical fiber cladding into a rare earth ion doped oxide single-crystal melt or a rare earth ion doped fluoride single-crystal melt, and filling the rare earth ion doped oxide single-crystal melt or the rare earth ion doped fluoride single-crystal melt into the single-crystal optical fiber cladding by utilizing a capillary phenomenon in an inert atmosphere, so as to obtain the rare earth ion doped oxide single-crystal melt or the rare earth ion doped fluoride single-crystal melt. Meanwhile, the melt is crystallized in a single direction by changing the temperature gradient in the temperature field and solidified into a laser single crystal optical fiber core in the single crystal optical fiber cladding, and then the cladding laser single crystal optical fiber is obtained after cooling, annealing and end face treatment. The cladding laser single-crystal optical fiber prepared by the method is uniform in diameter, not easy to crack and better in optical quality, and can further promote the preparation of a single-crystal optical fiber laser with high light beam quality and high power.

Method for evaluating the optical appearance of a driving route (28, 29, 30), wherein - from at least one motor vehicle (3) that is driving or has driven on the route (28, 29, 30), video data (6) containing an image sequence (13) of the route (28, 29, 30) which is transmitted to a computing device (4) via a respective communication link (7) and received - by an analysis device (12) on the basis of the video data (6) to images (14) of the image sequence (13) a correspondence value (15) concerning a degree of correspondence of the image (14) with a predetermined attractiveness criterion is determined and - the agreement values ​​(15) of the images (14) are combined to form an evaluation signal (10) for the image sequence (13) and - the evaluation signal (10) is provided as a description of the appearance of the route (28, 29, 30) and - a maximum range (16) of the evaluation signal (10) is detected in which at least one of the agreement values ​​(15) of the evaluation signal (10) is greater than a predetermined threshold (17), and - from the image sequence (13) at least one image (14) corresponding to the maximum range (16) of the image sequence (13) is determined and output, and - for each of the images (14) of the image sequence (13) a quality value (18) of an optical quality of the image (14) is generated based on a predetermined quality measure, wherein the quality measure specifies a signal-to-noise ratio and / or an image sharpness, and - the quality values ​​(18) are combined to form a quality signal (11) and - that at least one corresponding image (14) is determined from the maximum range (16) depending on the quality signal (11) and wherein - a playback duration of that part of the image sequence (13) for which the evaluation signal (10) has the maximum range (16) is determined and - depending on the playback duration either a video signal or only a single image (14) is output, whereby - for a route evaluation, each evaluation signal (10) is summarized by forming a mean value to obtain a single overall value (31) in order to obtain a compact statement about a journey route, and - the total value (31) for a journey and the extracted images are provided by the computing device (4) and - a navigation system (21) of a vehicle (5) and the computing unit (4) establish a communication link (22) and - the vehicle (5) obtains the extracted images and total values ​​from the computing unit (4) and graphically returns them to the driver as a route preview and route evaluation.

The invention provides an SLM metal 3D printing liftable field lens adjusting device which comprises a box body, a linear guide rail sliding table is arranged on the box body, the linear guide rail sliding table is connected with a galvanometer support through a lifting adjusting assembly, a galvanometer is fixed to the galvanometer support, and a field lens is arranged at the bottom of the galvanometer. When the laser focus is adjusted, the first hand wheel part is rotated to drive the first lifting lead screw and the second sliding seat to be in engaged transmission, so that the second sliding seat and the first sliding seat slide in a lifting manner along the guide of the linear guide rail, the lifting of the galvanometer and the lifting of the field lens arranged at the bottom of the galvanometer are adjusted, and the laser focus is accurately and reliably adjusted; and finally, the first locking device is used for limiting, beam expanding devices are reduced, the cost is reduced, and the optical quality is stable and reliable.

A photosensitive element module, a camera module and an electronic device, the photosensitive element module having an optical path and including a photosensitive element, a reflective element, an optical multilayer deposition structure layer and a nano rough surface. The photosensitive element corresponds to the light path. The reflecting element faces and is adjacent to the photosensitive element, and the reflecting element turns the light path. The optical multilayer deposition structure layer is farther from the photosensitive element than the reflective element along the optical path. The nanometer rough surface is arranged on one side, facing the reflecting element, of the photosensitive element, the nanometer rough surface comprises a plurality of nanometer protruding structures, and the nanometer protruding structures are irregular in shape and are arranged adjacently. Therefore, optical quality reduction can be avoided, and the industrial utilization rate is improved.

This invention provides an optical lens assembly, comprising, from a first side to a second side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially along the optical axis. The first side is the light-emitting side, and the second side is the light-receiving side. The optical lens assembly is used for projection, and multiple imaging rays pass sequentially through the sixth, fifth, fourth, third, second, and first lenses from the second side, generating multiple imaging rays that exit from the first side. The first lens has a negative refractive index, and the optical axis region of the first side of the first lens is concave. The second, third, and fourth lenses all have positive refractive indices. The optical lens assembly contains only the aforementioned first to sixth lenses. This optical lens assembly has the advantages of small size, large field of view, good thermal stability, and the ability to maintain good optical quality even when allowing light of different wavelengths to pass through.

The present invention relates to the technical field, and particularly to an optical lens injection mold and an injection method thereof. An optical lens injection mold includes a core structure, an upper mold structure, and a lower mold structure. The core structure includes an upper core, an inner lower core, and an outer lower core. The upper mold structure includes an upper template, an upper mold base plate, an upper demolding structure, and a sprue bushing. The lower mold structure includes a lower template, a support plate, a lower mold base plate, a first ejecting structure, a second ejecting structure, and a driving mechanism. By changing the demolding method of the optical lens from the core ejection that controls the surface shape to the core ejection that controls the outer diameter, during the entire demolding process, under the action of the upper demolding structure, the first ejecting structure, and the second ejecting structure, only the outer lower core that controls the outer diameter moves relative to the lower template to achieve demolding, which further improves the eccentricity accuracy of the upper and lower optical surfaces of the lens, thereby improving the optical quality of the lens.

The invention relates to an optical focusing module, a driving device, a camera and electronic equipment, the optical focusing module comprises a main shell, a movable shell, a fixed lens group, a movable lens group, at least two guide columns parallel to the optical axis direction and a focusing power unit, and the main shell and the movable shell are oppositely arranged along the optical axis direction; the fixed lens group comprises at least two optical lenses which are rigidly fixed in the optical axis channel of the main shell; the movable lens group comprises at least two optical lenses which are rigidly fixed in the optical axis channel of the movable shell; the guide column is installed on the main shell and is in sliding fit with the movable shell. And the focusing power unit is used for driving the movable shell to move along the axial direction of the guide post so as to realize internal focusing operation. According to the optical focusing module, the focusing operation is implemented by adopting an inner focusing mode, so that a precise automatic focusing function can be achieved, and the optical quality is further optimized and improved.

A method for simulating the effects of the optical quality of windshield onto the image recording quality of a digital image recording device, in particular a digital image recording device for an advanced or automated driver-assistance system. The method is based on a combination of an adapted stochastic ray tracing method and of an adapted machine learning method to simulate the effects of the optical distortions of a windshield on the image recording quality of a digital image recording device. The simulation is performed from a measured optical quality function of the windshields related to those optical distortions.

A projection lens includes a first optical lens group and a second optical lens group. The first optical lens group transmits an image beam to the second optical lens group. The second optical lens group projects the image beam out of the projection lens. The second optical lens group includes first and second reflective elements and an optical component. The optical component is disposed between the first and second reflective elements. The optical component includes a light-transmitting area and a reflective area. The first reflective element reflects the image beam from the first optical lens group and transmits it to the light-transmitting area. The light-transmitting area allows the image beam from the first reflective element to pass through and be transmitted to the second reflective element. The second reflective element reflects the image beam from the light-transmitting area and transmits it to the reflective area. The reflective area reflects the image beam from the second reflective element. A projection device equipped with the projection lens is also provided. The projection lens and projection device of the present invention have a foldable optical path to reduce the size of the projection lens, simplifying the manufacturing difficulty of the projection lens while maintaining good optical quality.

This invention provides a diazobiphenyl dye for thin-film polarizers, which is an analog of AD1. Thin-film polarizers prepared using this dye exhibit good optical quality, such as low light scattering, high dichroism ratio, broadband absorption, and / or stability to heat and light irradiation. This invention also provides a method for preparing the diazobiphenyl dye from two different monoazo dyes via a cross-coupling reaction. This method is eco-friendly because it does not use toxic benzidine as a raw material. The product (diazobiphenyl dye) obtained by this method can be purified in a simple and convenient manner, and the diazobiphenyl dye prepared by this method can have a symmetrical or asymmetrical structure. Furthermore, this invention provides a thin-film polarizer comprising the diazobiphenyl dye and an apparatus for display applications comprising the thin-film polarizer.

An imaging optical system, camera module, and electronic device are disclosed. The imaging optical system sequentially includes an infrared light-absorbing element, an infrared light-reducing film, and a flat panel element along a central optical path. The infrared light-absorbing element is an infrared light-absorbing plastic element used to refract light. The infrared light-reducing film is positioned closer to an imaging surface of the imaging optical system than an incident surface of the infrared light-absorbing element. The flat panel element is integrally formed and disposed between the infrared light-reducing film and the imaging surface. The flat panel element includes a light-transmitting portion and a support portion, wherein the light-transmitting portion is correspondingly disposed to the imaging surface, and the support portion surrounds the light-transmitting portion, keeping the light-transmitting portion at a specific position on the central optical path. This improves optical quality.