110 results about "Focal line" patented technology

A hybrid scanning antenna including: a reflector having a focal line; a first mechanical movement to move the reflector about a first axis; a second mechanical movement to move the reflector about a second axis; a linear array fixedly disposed along the focal line to electronically scan at a scan angle about a third axis; and a controller to control the first mechanical movement, the second mechanical movement and the scan angle of the linear array to orient the hybrid scanning antenna to a look angle of a remote transceiver.

A spectacle lens design includes an aperture and at least two ring-shaped focusing structures surrounding the aperture. The aperture has a dioptric power, and the ring-shaped focusing structures surrounding the aperture provide an additional power relative to the dioptric power of the aperture. A ring-shaped diffuser is arranged between neighboring ring-shaped focusing structures. Neighboring ring-shaped focusing structures can adjoin each other with a ring-shaped contact line between them forming the ring-shaped diffuser. Neighboring ring-shaped focusing structures can also be arranged at a distance to each other and at least one of the ring-shaped focusing structures provides a ring shaped focal line. Neighboring ring-shaped focusing structures can also be arranged at a distance to each other and at least one of the ring-shaped focusing structures consists of lenslets that adjoin each other so as to form a ring of lenslets and provides a plurality of foci along a ring shaped line.

The invention discloses a low-beam broadening focal line lens, a related lens module and a related lighting module, and relates to the technical field of car lamps, the low-beam broadening focal line lens comprises a first curved surface, a first total reflection surface and a second total reflection surface which are integrally formed, and a beam of parallel light enters from the first curved surface, is converged through the first curved surface and then enters the second curved surface; the light is reflected by the first total reflection surface and the second total reflection surface and is converged on a focal line; longitudinal focusing is achieved through the integrally-formed focal line lens structure, so that transverse focusing and longitudinal focusing are separated, the longitudinal focal length is larger than the transverse focal length, and a low-beam broadening light type wide in the transverse direction and narrow in the longitudinal direction can be achieved conveniently. The integrally-formed focal line lens is a single-layer lens, Fresnel loss is effectively reduced, total reflection is utilized, a light path can be folded, the size can be shortened, the size and weight of the lens are reduced while the lighting effect is improved, and energy saving and cost saving are facilitated; meanwhile, the refraction is less, the dispersion of projected light is small, and the color uniformity is good; the lens is good in static appearance consistency, and different modeling requirements can be met.

The utility model belongs to the technical field of car lamps, and particularly relates to a semi-collimating lens with a virtual focal line and a car lamp, the semi-collimating lens comprises a lens body, the two ends of the lens body are a light outlet end and a light inlet end respectively, the light inlet end is provided with a concave cavity with an opening facing a light source, and the top of the concave cavity forms a first light inlet surface; the side face of the concave cavity forms a second incident face, a third incident face is formed on the outer side of the second incident face in the horizontal direction, the projection contour line of the first incident face in the vertical plane is provided with a real focus F1, the focus of the light source coincides with the real focus F1, the projection contour line of the emergent face in the vertical plane is provided with a virtual focus F2, and the virtual focus F2 is located below the real focus F1. And the reverse extension line of the emergent light refracted by the light emergent surface is converged at the virtual focus F2. By means of the structure, the effect that light is collimated and received in one direction and diffused in the other direction can be achieved, reasonable distribution and efficient utilization of light rays are achieved, and therefore the more uniform lighting effect is achieved.

The utility model discloses a kind of visual calibration device of astigmatism eye focal line, comprising: axial position scale board, board face is printed with E-type visual target for distant visual detection;Cross visual target disc, coaxially rotatably embedded in through-hole;Several groups of pinholes, each group is arranged along visual target line two sides straight line, pinhole center connecting line is parallel with corresponding visual target line;Fixed shaft is through cross visual target disc center, and is mechanically connected with transmission device;LED light source, set in axial position scale board back surface.The utility model has beneficial effect: the utility model can provide clear and visible and invariable measured astigmatism eye objective existence astigmatism focal line of the person being examined, and can accurately determine the clear criterion that cross visual target line coincides with the focal line, so as to maximumly improve the accuracy of astigmatism eye astigmatism axial calibration, reduce the deviation of calibration astigmatism axial direction and actual astigmatism axial direction, improve determination accuracy and determination work efficiency.

A glassless stereoscopic image display device according to an embodiment of the present invention comprises: a display panel on which a plurality of rectangular pixels are arranged in a checkerboard manner; a lenticular lens which is composed of a plurality of convex lenses inclined at a predetermined angle in a predetermined direction with respect to the vertical axis of the display panel and is arranged on the front surface of the display panel; and a processor for controlling the display panel, wherein the plurality of pixels are arranged to be inclined to be parallel to a focal line formed according to the direction and angle in which the convex lenses are inclined, and the focal line is formed to be parallel to the convex lenses and is a set of focal points for a user to view a stereoscopic image.

A method of separating a transparent workpiece comprises depositing a sacrificial layer onto a textured surface of the transparent workpiece, the sacrificial layer comprising a refractive index that is less than or equal to a refractive index of the transparent workpiece and greater than or equal to a refractive index of air. A defect-forming laser beam is generated via an optical assembly and used to form a plurality of defects in the transparent workpiece through sacrificial layer. The defect forming laser beam either comprises a pulsed laser beam forming a laser beam focal line in the transparent workpiece or an optical power of greater than or equal a critical power level to induce Kerr effect self-focusing in the transparent workpiece. The transparent workpiece is separated along the contour.

The present application relates to the technical field of laser imaging, and in particular to a high-precision dynamic coupling method and device for a variable-tapered curved crystal and an X-ray streak camera, the method comprising: under the same optical path, respectively irradiating a variable-tapered curved crystal with a visible light source and X-rays, so that the variable-tapered curved crystal forms a visible light source focal line and an X-ray focal line on an imaging plate; acquiring position information of the visible light source focal line and the X-ray focal line by means of an image acquisition device, and extracting a focal line relative deviation; coupling the variable-tapered curved crystal and the X-ray streak camera by means of a three-dimensional adjustment mechanism, and continuously irradiating the variable-tapered curved crystal with the visible light source; and adjusting the position of the variable-tapered curved crystal by means of the three-dimensional adjustment mechanism according to the image acquisition device and the focal line relative deviation, so that the X-ray focal line coincides with a cathode slit of the X-ray streak camera. The purpose is to achieve high-precision coupling of the variable-tapered curved crystal and the X-ray streak camera.

The invention relates to an automatic focusing method applied to a micro-cell chip, and the method comprises the steps: collecting a surface image of the micro-cell chip through a camera erected on a mobile platform, obtaining a position matrix of a positioning mark based on a pre-trained positioning mark recognition model, the method comprises the following steps: acquiring a positioning mark of a microcosmic cell chip, acquiring a plane position of the positioning hole in a camera coordinate system through matrix mapping and coordinate transformation based on the position of the positioning mark, controlling and moving a vertical position of a microcosmic camera at the plane position, and acquiring M high-power microcosmic images of the microcosmic cell chip so as to determine a focus position of each positioning hole, fitting based on the focal position of the positioning hole to obtain a focal broken line, a focal plane and / or a focal curved surface, and calculating based on any one of the focal broken line, the focal plane and / or the focal curved surface and the cell height to obtain the focal position of the measured cell. According to the invention, the recognition precision and speed are improved, and errors can be significantly reduced through adaptive error correction.

The invention belongs to the technical field of power generation systems, and particularly relates to an optical fiber focusing solar power generation device. The device comprises a plurality of parabolic trough reflectors, a glass light collecting tube, a steam generating device, a steam turbine generator and a plurality of transmission optical fibers, a steam output tube of the steam generating device is correspondingly connected with a steam input end of the steam turbine generator, an axis of the glass light collecting tube is arranged at a focal line of the parabolic trough reflectors, and the parabolic trough reflectors are arranged in parallel. Each parabolic groove-shaped reflector is correspondingly provided with a glass light collecting tube, a collecting end of a transmission optical fiber is correspondingly arranged in each glass light collecting tube, and an output end of each transmission optical fiber is connected to a heat source input end of the steam generating device. According to the invention, a plurality of transmission optical fibers are converged to the same heat exchange system, and the plurality of transmission optical fibers play a role in secondary light condensation, so that a high-efficiency and low-cost solar heat energy conversion scheme is realized, and new possibility is provided for progress and popularization of a photo-thermal power generation technology.

The invention discloses an optical coupling assembly, an optical system with the optical coupling assembly and a vehicle lamp. The optical coupling assembly is located in the light emitting direction of a point light source. The optical coupling assembly is a free-form surface, light rays emitted by the point light source are refracted on the surface of the optical coupling assembly, the optical coupling assembly collimates the light rays emitted by the point light source in one direction, in the other direction perpendicular to the direction, reverse extension lines of the refracted light rays are converged to a virtual focal line, and the virtual focal line is a straight line. The invention has the advantage of providing an accurate collimation basis for the light emitting assembly.

The invention discloses a nano-cavity sensor for efficiently exciting fluorescence. The nano-cavity sensor comprises a quartz substrate layer, a micro-lens layer and a metal film layer which are sequentially arranged from bottom to top, the micro-lens layer is located above the quartz substrate layer and comprises a plurality of spherical-table-shaped micro-lenses protruding upwards; and the metal film layer is positioned on the quartz substrate layer and the micro lens layer, and is provided with through nano holes which are in one-to-one correspondence with the centers of the top planes of the table-shaped micro lenses. When exciting light enters, the spherical table type micro lens can focus a light beam emitted into the lens cavity from the bottom to the bottom of the nanopore to form a zero-mode waveguide effect, and fluorescent substances in the nanopore are excited through an evanescent field. The spherical table type micro lens modulates the direction of an excitation light beam, the light beam is converted into local enhanced excitation from parallel incidence, modulation of excitation photoelectric magnetic field distribution at the bottom of a nanopore and in a nanocavity in a solution environment is achieved, and distribution of an electromagnetic field is described by using a caustics line. According to the device, the excitation efficiency of a light path system on fluorescence is remarkably improved.

Eyeglass lens, eyeglass lens kit and method of providing an eyeglass lens design. An eyeglass lens is provided comprising an aperture having a refractive power and at least two annular focusing structures surrounding the aperture, the annular focusing structures providing an additional power of at least 0.5 dpt with respect to the refractive power provided by the aperture, at least one annular focusing structure consisting of lenslets abutting each other to form a ring of lenslets and providing a plurality of foci along an annular line, adjacent annular focusing structures being spaced apart from each other, characterized in that at least one annular focusing structure provides an annular focal line, an annular diffuser being arranged between and contiguously abutting adjacent annular focusing structures, one of the adjacent annular focusing structures consisting of lenslets abutting each other to form a ring of lenslets and providing a plurality of foci along an annular line, while the other of the adjacent annular focusing structures provides an annular focal line.

The utility model discloses an optical structure used for converting parallel light into a linear light source, an illumination module and a vehicle, the optical structure comprises a collimation unit and a reflection unit, the collimation unit is suitable for collimating and correcting incident light emitted by the light source, the reflection unit is suitable for receiving the incident light collimated and corrected by the collimation unit, and the reflection unit is suitable for reflecting the incident light emitted by the light source. And the incident light is reflected by the reflection unit so as to convert the collimated and corrected incident light into a linear light source. According to the utility model, the incident light emitted by the light source can be utilized to the greatest extent after sequentially passing through the collimation unit and the reflection unit; by designing the size of the imaging unit, the light reflected by the reflection unit can be received to the greatest extent; the occupied space of the whole optical structure is small; the focal line of the imaging unit is positioned in the negative direction of the light emitting direction of the reflecting unit, so that a higher illumination value can be obtained in a smaller occupied space; dispersion is small or almost no dispersion exists; when the imaging unit is a reflector, there is almost no dispersion and the light distribution is uniform.

A system and method for solar energy concentration is provided. One embodiment has a reflective trough with a reflective upper surface that reflects incident sunlight energy towards a focal line; a solar evacuated tube heat collector defined by a transparent fluid container member that has a length that corresponds to a length of the reflective upper surface of the reflective trough, wherein the solar evacuated tube heat collector is located along the focal line associated with the reflective trough such that an interior of the transparent fluid container member encompasses the focal line; and a wave guide located above and in proximity to the solar evacuated tube heat collector having a length corresponding to the length of the solar evacuated tube heat collector, wherein a lower surface of the wave guide has a reflective lower surface that reflects incident sunlight energy downwards onto the solar evacuated tube heat collector.

The present application relates to the technical field of vehicle lamps. Disclosed are a low-beam widening focal line lens, a related lens module and a lighting module. The low-beam widening focal line lens comprises a first curved surface, a first total reflection surface and a second total reflection surface that are integrally formed. A beam of parallel light is incident on the first curved surface, converged by the first curved surface, then reflected by the first total reflection surface and the second total reflection surface, and converged to a focal line. By means of the integrally formed focal line lens structure, vertical focusing is achieved, such that horizontal and vertical focusing are separated, and the vertical focal length is greater than the horizontal focal length, thereby helping to achieve a low-beam widened light pattern that is wide in the horizontal direction and narrow in the vertical direction; the integrally formed focal line lens is a single-layer lens, which effectively reduces Fresnel loss; total reflection can be used to fold an optical path and shorten the size, which reduces the volume and weight of the lens while improving the optical efficiency, thereby facilitating energy saving and cost saving; with less refraction, the projected light pattern exhibits low chromatic dispersion and good color uniformity; and the lens has good consistency in static appearance, thereby helping to meet different styling requirements.

The utility model relates to the technical field of automobile lamps, and discloses an optical structure capable of achieving even lightening, an automobile lamp and an automobile. The optical structure capable of being lightened uniformly comprises a first optical unit, a second optical unit and a third optical unit, the second optical unit is arranged above the first optical unit, and the second optical unit is of a reflection structure; the reflected light and the incident light are converged by the first optical unit and then are reflected by the second optical unit, so that uniform light emission is realized; the first optical unit is provided with a focal point or a focal line, and the inner wall of the second optical unit is provided with patterns used for reflecting and evenly distributing light. Light rays are gathered through the light gathering structure of the first optical unit, the light distribution patterns on the inner surface of the reflection structure of the second optical unit are evenly distributed, and the light ray uniformity and the lighting effect utilization rate are remarkably improved. The automobile lamp is flexible in structure and suitable for various application scenes such as automobile lamps.

The invention provides a wireless friendly composite building material design method, device and equipment, and the method comprises the steps: building an initial building material model according to obtained target wall design information, the target wall design information comprises the size of a target wall, a bearing material, a thermal insulation material and a cylindrical convex lens structure type, the target wall body comprises a thermal insulation layer and a cylindrical convex lens embedded in the thermal insulation layer; generating section size information of the cylindrical convex lens; determining the focal length and the focal line of the cylindrical convex lens according to the section size information and the relative dielectric constant of the bearing material; according to the focal length and the section size information, path loss from the base station to each horizontal intersection point and transmission loss of each horizontal intersection point on the target horizontal plane are determined, and the horizontal intersection points are intersection points of the target horizontal plane and the incident plane of the cylindrical convex lens; and determining a target building material model according to the path loss and the transmission loss corresponding to each horizontal intersection point. Channel deep fading can be suppressed, and user fairness in a horizontal plane is improved.

The utility model provides a car lamp module and a car lamp, and relates to the technical field of car lamps, and the car lamp module comprises a high beam module, a low beam module, an outer lens and a shading plate. Wherein the outer lens comprises a high-beam area and a low-beam area, the high-beam area is a focus lens, the low-beam area is a focal line lens, and the shading plate is located between the high-beam module and the low-beam module. The high-beam module comprises a first light source and a first optical unit, at least part of a light-emitting area of the first light source responds to the high-beam control instruction to emit a first light beam, the first light beam has an anti-dazzling function, and the first optical unit receives the first light beam and enables the first light beam to be emitted from a high-beam area of the outer lens as a high-beam light beam; therefore, an anti-dazzling distance light illumination function is realized. The low-beam module comprises a second light source and a second optical unit, the second light source responds to the low-beam control instruction to send out a second light beam, and the second optical unit receives the second light beam and enables the second light beam to be emitted from the low-beam area of the outer lens as a low-beam light beam, so that the low-beam illumination function is achieved.

Provided is a display panel, including: a base substrate, a display structure, a black matrix pattern, and a cylindrical lens structure layer. The black matrix pattern includes a plurality of first openings. The display panel is provided with a plurality of sub-pixel regions arranged in rows and columns. The first openings are disposed in the sub-pixel regions. The cylindrical lens structure layer includes a plurality of strip-shaped cylindrical lens structure and has a plurality of focal lines in an orthographic projection on the black matrix pattern. The focal lines are parallel to the length direction of the cylindrical lens structures. The focal lines partition each sub-pixel region into a plurality of regions. One of the plurality of regions is a non-crosstalk region. The black matrix pattern further includes second openings in the non-crosstalk regions. The second openings are disposed outside regions where the first openings are disposed.

The application provides a sectional CPC solar concentrator and a design method thereof. A compound parabolic reflector is fixed in a frame. A flat plate receiving surface is a heat absorbing surface of a flat plate light receiving body. The compound parabolic reflector is symmetrically arranged on both sides of the flat plate receiving surface. The compound parabolic reflector is composed of multiple sub-reflectors. The sub-reflectors are sequentially connected in a head-to-tail mode. The focal lines of the sub-reflectors on the flat plate receiving surface are evenly arranged from the middle to both sides. The focal lines of the sub-reflectors are different and parallel to each other. The sectional design of the traditional trough type parabolic concentrator profile is adopted, so that the energy flow density on the flat plate receiving surface is evenly distributed in multiple focal lines. The uniformity of the energy flow density distribution on the flat plate receiving surface of the concentrator is effectively improved. The thermal stress concentration on the flat plate receiving surface is greatly reduced. The service life of the concentrator is effectively prolonged.

The invention relates to a mirror for focusing electromagnetic radiation. The essence of the invention is that a reflective mirror surface 6 is established on a supporting structure, created by the rotation of elliptical arcs, where the first foci C1 of all elliptical arcs lie on one line and the second foci C2 of all elliptical arcs lie at one fixed point. Each elliptical arc is a part of an ellipse described in a Cartesian coordinate system (x, y, z) by the following equation: y2=b21−x2b2+cz2 where z is independent of x and y, c(z) is the focal distance of the rotated elliptical arcs dependent on z, b is the minor axis of the ellipse, and each ellipse has the same position of the second focus at the point (x = -c, y = 0, z = 0). Each ellipse is rotated around the rotational line 4 (x = -c, y, z = 0), where c is the focal distance corresponding to the distance from the focus to the center of the ellipse placed in the plane {x, y, 0}. Each point in the series C1(z) of the first foci of the rotated elliptical arcs is positioned on the focal line. The invention also relates to a method for focusing electromagnetic radiation and converting it into an electrical signal. The essence of the method is that the above-defined reflective mirror surface focuses radiation from a line source placed parallel to the series of first foci of the rotated elliptical arcs to at least one point on a line parallel to the second focal line. The intensity of the electromagnetic radiation is detected at this point and converted into an electrical signal by changing the electrical characteristic of a photosensitive element in the detector, from which the course of the electromagnetic radiation in time and space is determined. The invention further relates to a device for focusing electromagnetic radiation and converting it into an electrical signal. The essence of the device is that the mirror body 7, on its supporting structure, has the above-defined reflective mirror surface 6. At least one detector 13 of electromagnetic radiation is associated with this mirror body, placed on a line parallel to the second focal line, and connected to a recording device 20.

The present description relates to a linear scanning optical coherence tomography microscopy device (200). It comprises an interferometric microscope (201) including a reference arm, an object arm configured to receive an object (10), a beam splitter (204) coupling said object and reference arms to a light source (210) and a detector (222), and a first microscope objective (202) arranged on said object arm.It further comprises a one-dimensional confocal spatial filtering device configured to cooperate with said light source to illuminate said object along a focal line located in an object space of the first microscope objective, and a one-way scanning device (235, 237) of said focal line, arranged on said object arm upstream of said first microscope objective, and configured to scan the focal line in a lateral direction (y) substantially perpendicular to an optical axis (z) of said first microscope objective. FIG. 2.

The optical system comprises an imaging unit, at least part of the contour line of the imaging unit is a parabola, and a focal point F of the parabola forms a focal line a in the normal direction; the light source corresponds to the imaging unit, and the center of the light source is arranged along the focal line a; the mirror surface is perpendicular to the focal line a and is at least arranged on one side of the light source; one part of light emitted by the light source is directly emitted after being reflected by the imaging unit, one part of the light is reflected to the mirror surface through the imaging unit and then emitted after being reflected by the mirror surface, and one part of the light is directly emitted to the mirror surface and then emitted after being reflected. According to the optical system capable of lighting uniformly and the vehicle lamp, the brightness of corners / edges can be improved, and the effect of lighting uniformly is achieved.

The utility model discloses a reflective headlamp optical system, which comprises a light source, a primary optical unit, a first imaging part and a second imaging part, the primary optical unit is located in the light emitting direction of the light source and used for adjusting the emitting angle of light emitted by the light source. The first imaging part is located in the light emitting direction of the primary optical unit, and the first imaging part is used for reflecting the light rays adjusted by the primary optical unit; the second imaging part is located in the light emitting direction of the first imaging part, and the second imaging part is used for reflecting and emitting light passing through the first imaging part; the first imaging part is provided with a first focal line in the first direction, the second imaging part is provided with a second focal line in the second direction, the first focal line and the second focal line form a focus area of the whole optical system, and the optical system has the advantages of being even in lighting and avoiding dispersion.

The utility model belongs to the technical field of car lamps, and particularly relates to a reflective optical system and a car lamp capable of achieving horizontal wide-angle irradiation, the reflective optical system comprises a light source and a reflecting unit, the reflecting unit comprises a first reflecting surface and a second reflecting surface which are arranged in an intersecting mode, and the light source is arranged at the intersection point of a first focal line and a second focal line. According to the utility model, the first reflecting surface and the second reflecting surface are arranged in a crossed manner, and a certain included angle is formed between the two reflecting curved surfaces, so that the light utilization efficiency can be improved under the condition of limited opening width, the large-angle projection of light rays is realized, and the first reflecting surface and the second reflecting surface are paraboloids or similar paraboloids, so that the light utilization efficiency is improved. The light can be freely diffused in the horizontal direction by adjusting the shape and the focus position of the paraboloid; and the intersection point obtained by intersection of the focal lines of the respective reflecting surfaces is the position of the light source, so that the design ensures that the light emitted by the light source can realize an ideal projection effect after passing through the reflecting surfaces.

Lighting device for vehicles with a light source (3, 13, 13', 23) and with a reflector unit assigned to the light source (3, 13, 13', 23), which deflects a light beam emitted by the light source (3, 13, 13', 23) in the main emission direction (H) to produce a predetermined light distribution (L V ) and with a drive unit (7) for generating a relative movement between the light source (3, 13, 13', 23) and the reflector unit, characterized in that the reflector unit has a fixed reflector (4, 14, 24) and that the light source (3, 13, 13', 23) is arranged so as to be rotatable on a circular focal line (B) of the fixed reflector (4, 14, 24) and that the drive unit (7) sets the light source (3, 13, 13', 23) in motion in such a way that a predetermined light distribution (Lv) is generated by a plurality of partial light distributions (L1, L2, L3, L n) is formed.

The present invention discloses a controllable concentrated ammonia decomposition hydrogen production system and control method, comprising a reflective assembly and an ammonia decomposition assembly. The reflective assembly includes a mirror field frame, a flexible reflector, and a curling adjustment structure. The flexible reflector is parabolically curved and arranged on the sunward side of the mirror field frame. The curling adjustment structure is respectively connected to the two ends of the flexible reflector along the parabolic direction. The curling adjustment structure drives the two ends of the flexible reflector to move along the parabolic curvature of the mirror field frame to unfold and curl the two ends of the flexible reflector. The ammonia decomposition assembly includes an ammonia decomposition reaction tube, an ammonia decomposition catalytic module is disposed within the ammonia decomposition reaction tube, and the central axis of the ammonia decomposition reaction tube is located at the parabolic focal line of the flexible reflector. In the present invention, the area of ​​the flexible reflector can be flexibly adjusted according to the different intensities of solar radiation, thereby providing a suitable reaction temperature for the ammonia decomposition reaction. When solar thermal energy is insufficient, the electricity generated by the solar panel can be used for electric auxiliary heating.

The invention discloses focus ray paraboloid detection equipment and a use method, and belongs to the field of solar reflector precision detection. The device comprises a ray source, a scale and a keel, rays of the ray source or an extension line of the rays penetrate through a paraboloid focus to be detected, a dial corresponding to the ray source is arranged on the scale, an original point of the dial and an intersection point ray source are located on the same paraboloid, and the ray source and the scale which are located on the same paraboloid are fixedly connected through a support. The focus ray paraboloid detection unit is called as a focus ray paraboloid detection unit; the number of the focus ray paraboloid detection units is two or more, the focus ray paraboloid detection units are connected through the keel, and the focus ray paraboloid detection units are arranged in parallel and are perpendicular to the keel. By adopting the paraboloid detection equipment, the system error caused by the detection according to the theoretical paraboloid focal line of the traditional paraboloid detection equipment is eliminated, and the optical interception rate of the heat collector is improved.

A spectacle lens design includes an aperture and at least two ring-shaped focusing structures surrounding the aperture. The aperture has a dioptric power, and the ring-shaped focusing structures surrounding the aperture provide an additional power relative to the dioptric power of the aperture. A ring-shaped diffuser is arranged between neighboring ring-shaped focusing structures. Neighboring ring-shaped focusing structures can adjoin each other with a ring-shaped contact line between them forming the ring-shaped diffuser. Neighboring ring-shaped focusing structures can also be arranged at a distance to each other and at least one of the ring-shaped focusing structures provides a ring shaped focal line. Neighboring ring-shaped focusing structures can also be arranged at a distance to each other and at least one of the ring-shaped focusing structures consists of lenslets that adjoin each other so as to form a ring of lenslets and provides a plurality of foci along a ring shaped line.