368 results about "Concave surface" patented technology

An image capturing optical system includes seven lens elements which are, in order from an object side to an image side along an optical path: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. Each of the seven lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The third lens element has negative refractive power. The object-side surface of the fifth lens element is concave in a paraxial region thereof. The sixth lens element has positive refractive power. The seventh lens element with negative refractive power has the object-side surface being convex in a paraxial region thereof and the image-side surface being concave in a paraxial region thereof and having at least one inflection point.

The utility model discloses a unit building block pixel piece and building block pixel picture, unit building block pixel piece includes the square block part, the upper end surface of square block part is used as the pixel point of building block pixel picture, and the lower end surface of square block part is equipped with first joint boss, second joint boss, first joint boss is equipped with inner arc concave surface, outer arc convex surface and the end arc surface that is connected with inner arc concave surface and outer arc convex surface, and first joint point is equipped with inner arc concave surface, and second joint point is equipped with end arc surface, and third joint point is equipped with outer arc convex surface. The unit building block pixel piece of the utility model adopts the special structure design, and it can be jointed with the single buckle convex point at building block flat board, can be jointed between two buckle convex points at building block flat board, also can be jointed between four buckle convex points, thereby can be assembled according to the curve edge of pattern Smooth arc, and the pattern assembled is more flexible and lively, and has artistic expressiveness more.

The application discloses a kind of linear cutting continuous processing methods of seat body large aperture parallel group hole, belong to mechanical manufacturing technical field.This method is first with seat body A face as reference, planing, planing seat body shape and concave surface to drawing size;Again, workpiece is once clamped and aligned, and linear cutting molybdenum wire is used along preset trajectory to continuously cut, and all large aperture through hole is simultaneously processed, and 45° chamfer bevel is reserved at cutting place;Finally, intermittent welding is used to cutting seam, and workpiece temperature is strictly controlled not to exceed 80 DEG C to prevent thermal deformation, and after welding, weld is ground flat to make surface flush with concave surface.The application is characterized by linear cutting without mechanical cutting force, solves the problem that tool is easily appeared in traditional boring machine processing, through hole taper is big, parallelism is poor, effectively guarantees the size and shape accuracy of through hole.Workpiece is only single clamping, and it is free from dependence on high-skilled operators, processing efficiency and product consistency are significantly improved, and it is suitable for batch processing of large-size seat body parallel deep hole of 45 steel.

The present application relates to the field of display and lighting technology, and discloses a LED photoelectric glass arc-shaped lamp bead patching device, wherein the patching plate is centered on the protruding point position of the "convex" shape, and the left and right surfaces of the glass are curved in an arc shape, and the middle of the patching plate can also be curved downward to attach lamp beads to the concave surface of the "concave" glass; the lamp beads are elastically attached to the two kinds of glass with "concave" and "convex" shapes, which can flexibly adapt to the glass surfaces with different radii, avoid the difficulty in attaching lamp beads to the arc-shaped glass, and symmetrically support the left and right sides of the "concave" arc-shaped glass sinking downward; the left and right ends of the "convex" arc-shaped glass are respectively inserted into the inclined support base along the arrangement, and the position of the blocking block on the surface of the metal plug-in plate is adjusted according to the width of the arc-shaped glass, so that the arc-shaped glass can be accurately placed on the support base for support, prevent the arc-shaped glass from shaking during transmission, and avoid inaccurate lamp bead attachment operation.

According to one embodiment, a display device includes a first insulating substrate including a first surface, a second surface on an opposite side to the first surface and a concave portion located in the second surface, and a first light-emitting element and a second light-emitting element, located in the concave portion, and an inner wall of the concave portion includes a first inclined area and a second inclined area opposing the first inclined area, the first light-emitting element being located on the first inclined area, and the second light-emitting element being located on the second inclined area.

This disclosure discloses an optical imaging lens system comprising seven lenses. The seven lenses, arranged sequentially from the object side to the image side along the optical path, are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. Each of the seven lenses has an object-side surface facing the object side and an image-side surface facing the image side. The object-side surface of the third lens is concave near the optical axis. The image-side surface of the sixth lens is convex near the optical axis. The image-side surface of the seventh lens has at least one inflection point. The optical imaging lens system also includes an aperture, which is positioned between the fourth and fifth lenses. Under certain conditions, the optical imaging lens system can simultaneously meet the requirements of wide viewing angle, miniaturization, large aperture, and high image quality. This disclosure also discloses an image-capturing device having the above-described optical imaging lens system and an electronic device having the image-capturing device.

This application discloses an optical lens. The optical lens, along its optical axis from the object side to the image side, sequentially comprises: a first lens with negative optical power, its object side being convex and its image side being concave; a second lens with negative optical power, its object side being convex and its image side being concave; a third lens with negative optical power, its object side being concave and its image side being concave; a fourth lens with positive optical power, its object side being convex and its image side being concave; a fifth lens with positive optical power, its object side being convex and its image side being convex; a sixth lens with negative optical power, its image side being concave; a seventh lens with positive optical power, its object side being convex and its image side being convex; and an eighth lens with positive optical power, its object side being convex. The effective focal length F1 of the first lens and the effective focal length F of the optical lens satisfy: -8.8 ≤ F1 / F ≤ -7.7.

Proposed is a small lens system including a first lens, a second lens, a third lens, and a fourth lens arranged along an optical axis from an object. The iris diaphragm is located between the first lens and the second lens. The first lens has a negative refractive power and includes a surface concave surface on an object side and a convex surface on an image side. The second lens has a positive refractive power and includes convex surfaces on both sides. The third lens has a positive refractive power and includes convex surfaces on both sides. The fourth lens has a negative refractive power and includes concave surfaces on both sides. All surfaces of the first to fourth lenses are aspherical.

The utility model discloses a kind of projection lamp lens assemblies with annular luminous effect, which aims to solve the technical problem that the luminous effect of the lens assembly for projection lamp under prior art is usually limited to solid geometric figure, and cannot directly form annular luminous effect. The lens assembly comprises an assembly housing, a reflector and a lens body. The inner side of the assembly housing is connected with the reflector. One side of the assembly housing is provided with the lens body. The inner wall of the assembly housing is installed with a bearing seat. The lens assembly first moves the concave lens downward by the driving motor, the driving bevel gear, the driven bevel gear, the threaded rod and the movable block to the same horizontal line when the center of the concave lens and the center of the lens body. At this time, the light cannot pass through the concave lens when it shines on the surface of the light-shielding coating. The light that shines on the inner wall of the concave lens will be refracted outward. Then, the light will be emitted to the external environment through the lens body. In this way, annular luminous effect can be formed.

The application discloses an optical imaging lens, which comprises first, second, third, fourth, fifth and sixth lenses in sequence from the object side to the image side. A circumferential area of the object side of the first lens is concave; a circumferential area of the image side of the second lens is concave; a circumferential area of the image side of the third lens is convex; an optical axis area of the object side of the fifth lens is convex; the first, fourth and sixth lenses have positive refractive power, and satisfy 28.000≤HFOVD21t42 / (D11t21+D42t62), so that the advantages of large field of view, small aperture value and good imaging quality can be achieved. HFOV represents the half field of view of the optical imaging lens, D21t42 represents the distance on the optical axis from the object side of the second lens to the image side of the fourth lens, D11t21 represents the distance on the optical axis from the object side of the first lens to the object side of the second lens, and D42t62 represents the distance on the optical axis from the image side of the fourth lens to the image side of the sixth lens.

An optical system disclosed in the embodiment of the invention includes a first lens to an eighth lenses which are sequentially arranged along an optical axis in a direction from the object side to the sensor side, wherein the first lens has a positive refractive power and has a convex object-side surface, the second lens has a negative refractive power and a concave sensor-side surface, at least one of an object-side and sensor-side surfaces of the sixth lens has an inflection point, the seventh lens has positive refractive power and has a convex sensor-side surface, the eighth lens has negative refractive power, and the object-side surface and the sensor-side surface of the eighth lens have at least one an inflection point, and a center thickness of the seventh lens may be the thickest among center thicknesses of the first to eighth lenses.

This disclosure discloses a photographic optical system comprising five lenses. The five lenses, arranged sequentially from the object side to the image side along the optical path, are a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. Each of the five lenses has an object-side surface facing the object side and an image-side surface facing the image side. The first lens has positive refractive power. The object-side surface of the second lens is concave near the optical axis. The fifth lens has negative refractive power, and its image-side surface is concave near the optical axis. Under certain conditions, the photographic optical system can simultaneously meet the requirements of miniaturization and high image quality. This disclosure also discloses an image-capturing device having the above-described photographic optical system and an electronic device having the image-capturing device.

A photographing lens assembly includes five lens elements which are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. Each of the five lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The first lens element has positive refractive power. The third lens element has negative refractive power, the object-side surface of the third lens element is convex in a paraxial region thereof, and the image-side surface of the third lens element is concave in a paraxial region thereof. At least one of the object-side surface and the image-side surface of at least one lens element of the photographing lens assembly is aspheric.

This invention relates to the field of AR device technology, providing an AR optical lens and an AR device. The lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged sequentially along the optical axis from the object side to the image side. The first lens has positive optical power, with a convex surface on the object side and a concave surface on the image side; the second lens has positive optical power, with a convex surface on the object side and a concave surface on the image side; the third lens has negative optical power, with both the object side and the image side being concave; the fourth lens has positive optical power, with a concave surface on the object side and a convex surface on the image side; and the fifth lens has negative optical power, with a concave surface on the object side and a convex surface on the image side. All lenses are aspherical lenses. This invention, through a positive-positive-negative-positive-negative optical power arrangement of lenses, can simultaneously correct various aberrations such as spherical aberration, field curvature, and distortion, effectively achieving a large field of view, low distortion, and high resolution imaging effect, enhancing the immersiveness and clarity of AR displays.

A display device comprises pixel electrodes disposed on a substrate and spaced apart from one another, a pixel-defining film disposed on the substrate and including openings, which are spaced apart from one another and overlap the pixel electrodes, organic light-emitting layers disposed in the openings of the pixel-defining film, a common electrode disposed between the pixel-defining film and the organic light-emitting layers, an encapsulation layer disposed on the common electrode, a light-blocking layer disposed on the encapsulation layer and including holes, which overlap the openings and are spaced apart from one another, and color filters disposed in the holes of the light-blocking layer and overlapping the openings. Sides of each of the openings have concave-convex patterns including convex portions that protrude outwardly and concave portions that are inwardly depressed. The color filters are disposed to partially overlap one another on the light-blocking layer.

A building frame structure comprising an above-ground base structure, characterised in that the above-ground base structure has at least two ballast blocks (2) and the frame structure comprises a frame structure (4) rigidly fixed to the ballast blocks (2), each ballast block (2) is supported at least in two places by levelling feet (1), and at the support the levelling foot (1) comprises a convex surface (12) and the ballast block (2) comprises a corresponding concave surface (8), which surfaces are formed facing each other.

The invention describes a sphere measuring device (10) for optically determining at least one shape parameter (F) of an at least partially reflective sphere (12), wherein the sphere measuring device (10) comprises: a light source (14) for emitting coherent light (16) with a first central wavelength (λ1), a beam splitter (22) arranged to generate measuring light (16.M1) and reference light (16.R1), a measuring arm mirror (24) arranged to reflect at least a portion of the measuring light (16.M1) onto at least a portion of the sphere (12), and a reference arm mirror (30) configured to reflect at least a portion of the reference light (16.R1), wherein the sphere measuring device (10) is configured to superimpose at least a portion of the light (16.R2) reflected by the reference arm mirror (30) with at least a portion of the light reflected by the measuring arm mirror (24). (16.M2) in an interference area (34) such that interference occurs, a detector (40) which is arranged to detect at least one measurement brightness value (I. n ) in at least part of the interference range (34) and is designed such that, based on the measured brightness value (I n ) the at least one shape parameter (F) of the sphere (12) is determinable, wherein the measuring arm mirror (24) has a concave rotational ellipsoid section (26) which is designed such that the sphere (12) can be placed within the rotational ellipsoid section (26) with its center point (M) in a first focal point (B1) of the rotational ellipsoid section (26), namely in a measuring position, and the light source (14) is designed such that a light source point (20) of the light source (14) is located in the second focal point (B2).

The application relates to a plurality of curved surface integrally-formed myopia glasses lenses, and belongs to the technical field of glasses lenses. The plurality of curved surface integrally-formed myopia glasses lenses are of an integrally-formed structure, are more practical, and are of a light-transmitting structure. The side of the myopia glasses lenses close to the human eye is an inner arc surface, and the side far from the human eye is an outer arc surface. The outer arc surface is a smooth mirror surface, the mirror surface can realize a large-curvature mirror surface, and is more beautiful than a traditional mirror surface. In the inner arc surface, concave surfaces are uniformly distributed on the left and right sides to perform diopter compensation. The myopia glasses lenses can be a plurality of curved surface lenses, a spherical myopia lens or a double-curved surface myopia glasses lens or a cylindrical myopia glasses lens, and the whole is more practical and beautiful.

This invention relates to a method for assembling and adjusting a holographic concave grating monochromator, belonging to the field of optical instrument assembly and adjustment technology. It solves the problems of existing monochromator assembly and adjustment methods being cumbersome, time-consuming, labor-intensive, or having high theoretical requirements and low efficiency. The method involves leveling the holographic concave grating monochromator and laser; recording the initial spot height of the laser; directing the laser perpendicularly to the entrance slit of the monochromator to the center of the grating; measuring and recording the heights of the 0th and ±1st order diffraction spots; plotting the trajectories of the multi-order spectral spots; adjusting the pitch and / or tilt angle of the grating according to the trajectory until the center of each diffraction spot is collinear with the initial spot height; rotating the grating to allow the 0th order light to exit from the exit slit; using a right-angle fixture to adjust the grating shaft lever to be perpendicular to the drive screw and locking it; placing an external light source at the entrance slit; observing the clarity of the spectral lines at the exit slit using a microscope; and adjusting the thickness of the shim at the exit slit to achieve precise conjugate matching between the entrance and exit slits. This invention is simple to operate, quick to assemble and adjust, and highly accurate.

The present application provides an optical imaging lens, which comprises a lens barrel, a lens set arranged in the lens barrel and a plurality of spacer elements; the lens set is sequentially arranged along the optical axis from the object side to the image side as a first lens with negative focal power, the first lens image side is concave; a second lens with positive focal power, the second lens object side is convex; a third lens with negative focal power, the third lens object side is concave; a fourth lens with positive focal power, the fourth lens object side and image side are both convex; a fifth lens with negative focal power, the fifth lens image side is concave; a sixth lens with positive focal power, the sixth lens object side is convex, and the sixth lens material is glass; there is at least one spacer element between any two adjacent lenses, and the spacer element is in contact with the lens part adjacent to its object side.

This invention provides a five-element glass lens for automotive headlight projection, belonging to the field of automotive lighting technology. The five-element glass lens comprises a first positive biconvex lens, a negative biconcave lens, a first positive meniscus lens, a second positive biconvex lens, and a second positive meniscus lens, arranged sequentially along the optical axis from the object plane to the image plane. The image plane side surface of the first positive meniscus lens is convex, and the object plane side surface is concave. Similarly, the object plane side surface of the second positive meniscus lens is convex, and the image plane side surface is concave. This invention's automotive headlight projection lens features a large relative aperture, high transmittance, low distortion, and strong high and low temperature stability, meeting the dual requirements of illumination and imaging in automotive projection headlights.

This invention provides an optical lens comprising seven lenses of optical power, arranged sequentially along the optical axis from the object side to the image plane: a first lens with negative optical power, its object side being convex and its image side being concave; a second lens with optical power; a third lens with positive optical power, its image side being convex; a fourth lens with positive optical power, its object side being convex and its image side being convex; a fifth lens with negative optical power, its image side being concave; a sixth lens with positive optical power, its image side being convex; and a seventh lens with negative optical power, its image side being concave. The effective focal length f, the maximum field of view (FOV), and the true image height IH corresponding to the maximum field of view satisfy the following condition: 27° < (f × FOV) / IH < 32°. The optical lens provided by this invention, through the rational configuration of the lens surface shapes and the appropriate combination of optical powers, can effectively improve the imaging quality and enhance the image performance of the optical lens.

This invention provides an imaging lens that can effectively correct aberrations even in close-up photography, and a camera device incorporating the imaging lens. The imaging lens, from the object-side to the image-side, comprises: a front lens group having positive refractive power that remains constant during focusing; an aperture, continuously arranged with the front lens group; a first focusing lens group having positive refractive power; a second focusing lens group having negative refractive power; and a final lens group, arranged on the image-side and having positive refractive power that remains constant during focusing. When focusing from an object at infinity to a closer object, the first and second focusing lens groups move by increasing their spacing from each other. The lens surface of the first focusing lens group on the object-side is concave, and the lens surface of the front lens group on the image-side is concave.

This utility model discloses a broadband imaging lens, comprising a lens group disposed inside the lens barrel. The lens group, arranged sequentially along the optical axis from the object plane to the image plane, includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, all of which are positive diopter glass spherical lenses. The first lens has a convex object-side surface and a concave image-side surface; the second lens has a convex object-side surface and a concave image-side surface; the third lens has a convex object-side surface and a concave image-side surface; the fourth lens has a convex object-side surface and a concave image-side surface; and the fifth lens has a convex object-side surface and a convex image-side surface. This broadband imaging lens has an EFL of 50mm, a spectral range of 400–1000nm, weighs less than 100 grams, has a center MTF of 32lp / mm > 0.5, and an edge MTF of 32lp / mm > 0.3. It exhibits high image quality, small size, low cost, and the lens head is also waterproof and dustproof.

The application provides a visible light band optical fiber SPR liquid refractive index linear measurement device and method, the device comprises a broadband light source, a first lens and a second lens, a polarizer, a third lens and a fourth lens, a pinhole, a fifth lens, an optical fiber SPR, a sixth lens, a diffraction grating, a concave mirror, a linear array CCD and a data processing unit; the data processing unit is used for extracting the resonance wavelength corresponding to the normalized light intensity minimum value from the wavelength-intensity spectrum curve, and calculating the refractive index of the liquid medium to be measured according to the linear relationship between the refractive index and the resonance wavelength which is calibrated in advance. The device is not only intuitive in optical path debugging and easy to operate, but also has a rigorous theoretical model and high measurement precision, and is very suitable for rapid and accurate refractive index screening and analysis of a large number of low-concentration liquid samples, and has wide application prospect and industrial value.

A lighting system and method controls light to prioritize different elements of a light beam output by a luminaire. An LCD surface acts as a color occlusion filter that provides pixel-level control over the light beam transmitted by the layer. An internal LED light source is projected perpendicular to a concave reflector that can be moved on an axis, thereby scaling to widen or narrow the light that is emitted forward as a light beam. The system also includes certain cooling features.