224 results about "Facet" patented technology

Techniques for implementing image rotation control using reflective waveguide facets in an AR eyewear display system are disclosed. A facet (602) is disposed in a light propagation path located between a first surface (S1) and a second surface (S2) of a waveguide (600) and is arranged to guide propagation of light for a display through the facet from the first surface to the second surface. Using this configuration, light is transmitted through the facet as it guides propagation of the light from the first surface to the second surface, which reduces the amount of image rotations or inversions that would otherwise be induced in the waveguide using conventionally oriented facets and thus simplifies or optimizes the design of other aspects of an AR eyewear display system, such as display source placement or orientation or form-factor bulkiness.

A method and system for determining a pupil profile for imaging a pattern on a substrate in a lithographic process is disclosed. Data indicative of a relationship between a lithographic performance change and a source change throughout the pupil plane is obtained, based on which the first pupil profile is optimized to generate a second pupil profile. The second pupil profile is a discrete pupil profile corresponding to a desired free-form pupil profile that can be used to print a pattern on a substrate using a lithographic apparatus. An illumination system (e.g., a field facet mirror) may be configured based on the second pupil profile to print a pattern on the substrate.

A method for operating a projection exposure system (1) comprises the following steps: providing a projection exposure system (1) with a radiation source (1) for generating illumination radiation (3), an illumination optic (11) for transferring the illumination radiation (3) from the radiation source (2) to an object field (8) extending in a scan direction (y) and a cross-scan direction (x), wherein the illumination optic (11) has at least one faceted mirror (6, 7) with a plurality of individual mirrors, and wherein at least a subset of the individual mirrors is configured such that they only partially illuminate the object field (8) in the scan direction (y), and a projection optic (10) for imaging a reticle (12) arranged in the object field (8) of the illumination optic (11) onto a wafer (19) arranged in an image field (17) of the projection optic (10), and specifying a set of at least one element of field-dependent aberrations. (Ai(x, y);i=(1..M)), specification of a target vector (Z(x) = (Z1(x), ..., Z; M (x) T ) for the target values ​​Z i (x) of the aberrations Ai(x, y) after averaging over the scan direction (y), dividing the extent of the object field (8) in the scan direction (y) into j ≥ 2 intervals ([y0; y1], ..., [y j-1 ; y j ]) and determining scan weights (gi(x, y)) which characterize a dependence of an illuminance at a location x in the cross-scan direction in the object field () on a position in the scan direction (y) such that a deviation of a weighted aberration vector A weighted ( x ) → : = ∑ gi A l → is reduced from the target vector (Z(x)).

A field facet mirror for an illumination optic for EUV projection lithography is designed for arrangement in the area of ​​a field plane of the illumination optic. The field facet mirror has a plurality of field facets (25 T ) for the reflective transfer of illumination light (16) from a light source to an object field with a predetermined distribution of illumination light intensity over a field height of the object field. At least some of the field facets are designated as partial field illumination facets (25 T ) executed. These have a partial field illumination facet reflection section (31) for the reflective transfer of the illumination light (16) TF ) as useful illumination light from the light source towards a partial object field section of the object field that is smaller than the object field. Furthermore, the respective partial field illumination facet (25 T) an output-coupling facet reflection section (32) for the reflective transfer of the illumination light (16 AK ) as output illumination light from the light source to at least one output coupling component. The partial field illumination facet reflection section (31) on the one hand and the output coupling facet reflection section (32) on the other hand are fixed components of the respective partial field illumination facet (25). T ) represents. This results in a field facet mirror, which allows for a demanding specification of an illumination intensity distribution over at least one object field coordinate without undesirable side effects.

The invention is suitable for the field of three-dimensional printing, and provides a method for generating a slice map and a 3D printing method. A method of generating a slice map includes providing a three-dimensional model including a plurality of facets, each facet associated with a surface feature; outputting a plurality of slice images through a plurality of tangent planes intersected with the three-dimensional model, wherein each slice image comprises a first intersection point of the tangent plane and the plurality of facets; through a plurality of straight lines perpendicular to the tangent plane, determining second intersection points of the plurality of straight lines and the plurality of patches; and determining an association attribute of the slice map at least based on the surface feature associated with the first intersection point and the surface feature associated with the second intersection point. According to the method, the accuracy of the obtained slice image can be improved.

The utility model provides a silicon carbide crystal growth device for improving the spiral dislocation defect. The silicon carbide crystal growth device comprises a crucible body and a plurality of graphite partition plates arranged in the crucible, and the graphite partition plates are arranged at the bottom of a raw material area of the crucible at equal intervals; the graphite clapboards are inserted into the silicon carbide powder at intervals, the heights of the graphite clapboards are in an arithmetic progression, so that the heights of the silicon carbide powder are also in an arithmetic progression, and the heights of the graphite clapboards and the silicon carbide powder in the corresponding areas are gradually reduced in the direction from the small surface area of the seed crystal to the direction far away from the small surface area. In the single crystal growth process, the silicon carbide powder in the graphite partition interlayer is heated to sublimate, and the distance between the surface of the silicon carbide powder and the growth surface of the seed crystal is reduced due to the height advantage of the silicon carbide powder in the graphite partition area with higher height, so that the growth component forms the component density advantage at the surface of the seed crystal in the area; the conversion and movement processes of screw dislocation in the crystal are effectively promoted, and the crystal quality is improved.

A Kaleidoscopic Geometric Vision Platform (KGVP) that transforms three-dimensional (3D) machine vision through an optical system that creates multiple virtual laser projectors from a single moving component. A spindle mirror mechanism (SMM) rotates a reflective surface to sweep collimated laser beams in circular patterns. These beams strike a series of kaleidoscopic mirror facets (KMFs) arranged concentrically around the SMM in a concave configuration. Each KMF redirects the rotating beam, creating a virtual projector with a distinct origin point and sweep direction. As the SMM completes one rotation, it generates N distinct laser trajectories (where N equals the number of KMFs), each sweeping from a different virtual origin point. Event-based cameras / sensors positioned strategically around the KMFs detect laser light reflected from object surfaces with microsecond precision. The KGVP triangulates 3D surface coordinates by determining correspondence between detected light and specific virtual projectors based on precise timing information. This approach eliminates the computational complexity typically required for multi-view feature matching, as the KGVP can unambiguously identify which virtual projector created each detected event. With calibration, the KGVP can establish the exact 3D positions of all virtual projector origins and their beam trajectories and build look-up tables that optimize triangulation accuracy. The KGVP enables real-time 3D surface reconstruction with high precision while using far fewer mechanical components than conventional machine vision systems.

The invention relates to an optical measuring arrangement (100) for detecting a distance between a first component and a second component by measuring the length of at least one measuring path (101), wherein the measuring path (101) is spanned between at least two facets (102, 103) forming a measuring head, which are directly or indirectly connected or connectable to the first component, and a measuring target (104) arranged in the measuring path (101), which is directly or indirectly connected or connectable to the second component and is configured to deflect a measuring beam (105) back and forth in the measuring path (101) between the facets, wherein the second facet (103) is formed as a reflecting facet (103). The center of curvature of one of the facets (102, 103) of the measuring head is located on the measuring target (104) or at most 20% of the distance between the facet (102, 103) and the measuring target (104). The invention further relates to a projection exposure system, a lithography system, an inspection system and a coordinate measuring machine.

The application discloses a wallboard fixing device first-level installation method for diamond cutting surface modeling, which comprises square steel, U-shaped guide rails, an adjusting assembly and an installation pipe, the adjusting assembly comprises a connecting pipe, first and second connecting blocks are fixedly connected to two ends of the connecting pipe, sliding blocks and connecting plates are arranged on opposite surfaces of the first and second connecting blocks respectively, and a rotating shaft is installed on the outer side of the connecting plate through a fixing plate. By adjusting the length of the connecting pipe, the overall length of the adjusting assembly can be adjusted, and then the inclination angle of the honeycomb aluminum plate and the stone plate can be adjusted. Meanwhile, by using the sliding cooperation between the adjusting assembly and the U-shaped guide rails, the honeycomb aluminum plate and the stone plate can be quickly installed without the need of holding and fixing installation, so that the operation is simple, time and labor are saved, the stone plate is not prone to being damaged, and the adjacent two honeycomb aluminum plates can be tightly butt-jointed together, so that the best splicing effect is achieved.

The present disclosure provides a Group II-VI core-shell quantum dot and a preparation method therefor. A quantum dot shell having a gradient alloy structure is gradually grown by using a precursor that has a reactivity gradient. The gradient alloy structure has a band gap that gradually increases from inside to outside, thereby solving the problem of difficulty in epitaxial growth caused by a decrease in the surface activity of a quantum dot along with an increase in the size thereof. By using zinc halide and octanethiol to regulate crystal facets, the proportion of polar facets on the surface of the quantum dot is increased, and the stability of the quantum dot is significantly improved. Moreover, provided is a low-cadmium quantum dot core. A hot-injection method is used to perform nucleation and growth of ZnSe at a high temperature, a cadmium precursor is then added after the stable nucleation of ZnSe, and cadmium / zinc ion exchange is performed by utilizing the binding energy of selenium / cadmium that is stronger than that of selenium / zinc, thereby forming a CdZnSe ternary core, which can solve the problem of it being difficult for blue-light quantum dots that use CdZnSe as a light-emitting core to cover the pure blue band.

The invention relates to a jewelry metal surface treatment process which comprises the following steps: S1, after jewelry is processed into a blank, carrying out primary processing and polishing, and after the surface is flattened, carrying out secondary fine polishing until the surface is smooth and free of recesses and scratches; s2, the polished jewelry is put into a sulfuric acid solution to be subjected to acid pickling so as to remove impurities on the surface, and then the jewelry is washed with clear water; s3, carrying out sand blasting treatment on the washed jewelry by adopting glass quartz sand of 53-150 microns and glass quartz sand of 150-220 microns, so that an antique visual effect is generated on the surface; s4, the jewelry subjected to sand blasting is subjected to wire drawing on a wire drawing machine of a tungsten steel wire drawing needle or a diamond wire drawing needle, so that uniformly-distributed wire bottom textures are generated on the surface; s5, acid pickling and water washing in the step 2 are repeated; and S6, the jewelry subjected to wire drawing is subjected to sand blasting treatment through diamond powder of 40-220 micrometers, impact concave facets which are evenly distributed are generated on the surface, and the surface generates the starlight shining effect under natural light.

According to a first aspect, the present disclosure relates to a distributed feedback (DFB) laser configured to control a wavelength of emitted light from the DFB laser, the DFB laser comprising a planar substrate, a substantially planar front facet with an anti-reflective coating, the front facet substantially perpendicular to the planar substrate, a substantially planar rear facet with a high reflectivity coating, the rear facet substantially perpendicular to the planar substrate, a laser section positioned between the rear facet and the front facet, the laser section comprising: a first ensemble of substantially planar layers configured to produce, with said planar substrate, a first PIN junction, the first ensemble of substantially planar layers comprising: a first top layer substantially parallel to the planar substrate; an active layer substantially parallel to the planar substrate and configured to emit light through the front facet, the active layer arranged between the planar substrate and the first top layer; a grating layer arranged substantially parallel to the active layer, the grating layer arranged between the planar substrate and the first top layer in proximity to the active layer; a Bragg grating arranged in said grating layer and configured to reflect light towards said front facet; and a phase section positioned between the rear facet and the laser section, the phase section comprising: a second ensemble of substantially planar layers comprising: a second top layer substantially parallel to the planar substrate, the second top layer substantially coplanar with the first top layer; an optical layer arranged between the planar substrate and the second top layer, the optical layer substantially coplanar with the active layer and optically coupled with the active layer; a non-grating layer substantially coplanar with the grating layer; and an element in electrical or thermal contact with the optical layer, the element configured, under application of a current or voltage, to change a refractive index of the optical layer so as to change the wavelength of the emitted light.

1. Name of the product in this design: Emulsion Jar (Acrylic Diamond Facet). 2. Purpose of this design: Container for holding emulsion. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model. 5. This product is made of transparent material.

A fixed blade, two-blade broadhead for use on a hunting arrow that employs multiple, flat surface facets that automatically hold the correct bevel angle for edge sharpening when the broadhead is placed upon a sharpening stone.

The application discloses a cavity surface coating method for a non-airtight packaged semiconductor laser, and is suitable for the technical field of semiconductor lasers. The film system structure obtained by the cavity surface coating method for the non-airtight packaged semiconductor laser has a SiN film layer stress of only 100 Mpa, which is 14 times lower than that of the existing SiN film layer, and a corrosion resistance to hydrofluoric acid solution which is 12 times slower than that of the SiN grown by PECVD. The stress defects are released, and the compactness is further enhanced on the basis of the original compactness. The refractive index of the material in the near-infrared waveband is about 2.0, which meets the requirement of the theoretical parameter of the optical thin film design of the laser, and the SiN film layer is compact, well matched with the bar strip lattice, low in defect density, small in stress, firmly combined with the bar strip cleavage surface, and can effectively prevent the external water and oxygen from penetrating the contact cleavage surface, so that the stability of the laser in the high-temperature and high-humidity environment is ensured.

A coated article is described herein with a substrate having a major surface that comprises a first portion and a second portion that is curved or faceted; and an optical coating on the major surface that forms an anti-reflective surface. A first direction is normal to the first portion and is not equal to a plurality of second directions that are normal to the second portion, and the angle between the first direction and each of the second directions is from about 10 degrees to 60 degrees. Further, the coated article exhibits at the first and second portion a hardness of about 8 GPa or greater at an indentation depth of about 100 nm or greater. Further, the coated article exhibits a single side maximum reflectance of about 3% or less as the first and second portion, wherein the reflectance is measured in a range from about 425 nm to about 950 nm.

The present invention relates to a glazing system comprising a vehicle glazing (100), the glazing having a transmission window (111) in a near-infrared range and a diverging lens (20) having a first surface (21) and a second surface (22), opposite the first surface, the second surface (22) being intended to be oriented towards the outside of the glazing, at least one of said first and second surfaces, the diverging lens (20) having a first surface (21) and a second surface (22) being structured, the structured surface comprising a set of structures, in relief, concentric around said optical axis, and according to a radial section of the structured surface, the set of structures form an alternation of facets (210) and counter-facets (211).The diverging lens (20) is arranged and configured so as to receive said emission beam (70) from the LIDAR on the facets of the structures and all or part of the structures, called reference structures, each have facets at an angle Ak with respect to said plane of the diverging lens, the angle Ak of ​​the facets in absolute value increases with the radial distance, each having a height which varies with distance from the optical axis such that the external vertical angular aperture VFOV2 is greater than the initial vertical angular aperture VFOV1 and the external horizontal angular aperture HFOV2 is greater than the initial horizontal angular aperture HFOV1. Figure for the abbreviation: Fig. 1.

A method of Selective Area Epitaxy (SAE) on a semiconductor wafer is disclosed. A dielectric mask is deposited on the wafer surface to define an opening for epitaxial growth. The mask includes a zigzag edge formed by successive straight facets oriented to avoid crystallographic directions associated with unintentional growth enhancement. During SAE, a semiconductor layer is grown in the opening such that edge-growth enhancement at the zigzag edge is suppressed relative to straight edges aligned with [011] or [0 11] directions. By replacing straight mask edges with zigzag geometry, fragile linear overgrowth is avoided, reducing particulate contamination and improving device reliability. The zigzag edge may be tailored by pitch, amplitude, or facet orientation, including angles such as 34°, 56°, 124°, or 146° relative to [011]. The method is applicable to III-V materials, including InP-based photonic integrated circuits, lasers, modulators, and amplifiers.

The invention discloses a diamond cutting processing technology, and relates to the technical field of diamond processing, a table top, eight first facets and eight kite faces are cut on the crown part of a diamond, and two pairs of upper waist facets are cut between every two kite faces; the diamond pavilion part is cut into a regular hexadecagonal cone, two bottom reverse faces are cut at the position, close to the pavilion tip, of each conical face of the regular hexadecagonal cone, the positions of the high points of the two bottom reverse faces coincide, and a heart shape is formed at the pavilion tip; and eight petal surfaces are cut in the circumferential direction of the diamond waist. Compared with the prior art, the method has the advantages that the optical performance is remarkably improved, the diamond is endowed with unique appearance, and the cutting precision is accurately controlled.

The utility model discloses a high-glossiness flat-bottom hot-fix rhinestone, which comprises a bottom plate (1), a support body (2) is adhered to the middle of the top surface of the bottom plate (1), and a hot-fix rhinestone main body (3) is sleeved on the support body (2); a reflective aluminum electroplating film (4) adhered to the outer side surface of the support body (2) is arranged between the hot-fix rhinestone main body (3) and the support body (2), and a broken rhinestone layer (5) is filled between the reflective aluminum electroplating film (4) and the hot-fix rhinestone main body (3); a plurality of first facets (6) are arranged on the outer surface of the hot fix rhinestone main body (3), and a second facet (7) is arranged right above the joint of every two adjacent first facets (6). The LED lamp not only can improve the glossiness, but also has the advantages of being high in use flexibility and use stability, long in service life and good in light and shadow effect.

The fancy concave cutting gemstone faceting attachment device is a device that allows concave type faceting of gemstones by means of mounting this device to an existing faceting machine. This may be accomplished utilizing the existing machines drive motors and hardware. This device prevents the need to purchase completely separate concave faceting machines to accomplish the same task of concave faceting. This is preferably a universal machine design allowing this device to mount to many makes of faceting machines in the current marketplace.

The application discloses a kind of facet angle parameter automatic calculation and process parameter mapping method and system, it is related to digital parameter processing technical field;Method includes: the angle difference of each facet junction of lens is acquired in advance;For each facet junction, in the minimum transition bandwidth reference data acquired in advance, according to the corresponding angle difference, form transition bandwidth lower limit list;Based on the optical sensitivity distribution data acquired in advance, form transition bandwidth upper limit list;Based on transition bandwidth lower limit list and transition bandwidth upper limit list, conflict determination and solution are carried out, and form final transition bandwidth list;Based on facet angle matrix and final transition bandwidth list, transition band geometry is generated for each facet junction, and new lens surface model is obtained;The application can consider the dual needs of facet angle keeping and step elimination, so that transition bandwidth adapts to the optical and processing requirements of different regions.

The present application relates to the field of anti-counterfeiting technology, and discloses an anti-counterfeiting element, comprising: a dynamic pattern, the dynamic pattern comprising at least one bright line, the movement area of the bright line being a feature area; the feature area comprising a plurality of curved surface structures, the curved surface structure having a plurality of light coordinates parallel to the surface of the feature area, each light coordinate comprising a first direction and a second direction, and each light coordinate corresponding to a line segment on the bright line having a different curvature; the curved surface structure being curved along the first direction, and the bending degree of the curved surface structure along the second direction being less than the bending degree of the curved surface structure along the first direction. By curving the curved surface structure along the first direction, the emergent light of the curved surface structure can be emitted in a sector direction under the incidence of light in a predetermined direction, and the angle distribution of the emergent light is more uniform, so that a single curved surface structure can obtain a combined effect equivalent to a plurality of reflective facets in the prior art, and the dynamic effect of the bright line movement can be clearer.

One aspect relates to a plastic lens or lens blank for the manufacture of a plastic lens with a first surface (12) and a second surface (14) opposite the first surface (12), wherein the plastic lens or lens blank has an annular central region (10) and a plano-steep facet (20) surrounding the central region, wherein the plano-steep facet comprises a plano-facet (22) surrounding the central region (10) and a steep facet (24) adjoining and surrounding the plano-facet (22), the plano-facet (22) being formed as a projection of the central region (10), wherein at least one of the surfaces (12, 14) in the region of the plano-facet (22) is arranged substantially perpendicular to a central axis (16) of the plastic lens or lens blank, and the steep facet (24) being formed as a projection of the plano-facet having at least one tip (240).which points away from at least one of the surfaces (12, 14) of the plastic lens or the lens blank in the area of ​​the planar facet (22). Further aspects concern a casting package and a manufacturing process.

To provide a mechanism capable of setting an accurate cutting direction in gem polishing.SOLUTION: There is provided a gem polishing apparatus that facilitates centering of a workpiece, fixes an orientation of the workpiece using a single index, and does not require experience and skill of an operator by using an analog rotary type angle gauge.SELECTED DRAWING: Figure 0006

A stack has first and second faces and multiple LOEs that each has two parallel major surfaces and a first plurality of parallel internal facets oblique to the major surfaces. A first block has third and fourth faces and a second plurality of parallel internal facets. The first block and the stack are bonded such that the second face joins the third face and the first and second facets are non-parallel, forming a second block. The second block is cut at a plane passing through the first face, forming a first structure having an interfacing surface. A third block has fifth and sixth faces and a plurality of parallel internal reflectors. The third block and the first structure are bonded such that fifth face joins the interfacing surface and the internal reflectors are non-parallel to all the facets, forming a second structure. Compound LOEs are sliced-out from the second structure.

The application relates to a virtual reality-based intangible cultural heritage immersive experience method, device, equipment and medium. The method comprises the following steps: acquiring multidimensional data of a target intangible cultural heritage scene; performing grid processing on original three-dimensional point cloud data to obtain an initial three-dimensional geometric model; performing spatial registration on a spectral reflection curve and the initial three-dimensional geometric model to obtain a three-dimensional geometric model containing material spectral properties; analyzing a facet spectral emission curve in combination with a scene space-time cultural database to generate a parameterized physical material library; generating a basic light image in combination with the parameterized physical material library and the scene space-time cultural database according to experience space-time information selected by a user; fusing environmental special effect physical description parameters and the basic light image to obtain a synthesized visual picture result; and generating an immersive experience instruction based on the synthesized visual picture result and environmental special effect data. The method can dynamically adapt to material characteristics and space-time changes of different intangible cultural heritage scenes, and improves the restoration degree of the intangible cultural heritage scene and the user immersion.