3657 results about "Focal length" patented technology

The invention discloses an intelligent steel pipe surface defect recognition system based on deep learning, and particularly relates to the technical field of pipe surface defect analysis. An annular polarization light source array and a high-frame-rate CMOS sensor are adopted to synchronously collect visible light and near-infrared multi-polarization images; a surface normal is calculated based on Stokes parameters, mirror surface suppression and diffuse reflection enhancement are realized, a defect candidate area is generated by fusing multi-scale Laplacian pyramid residual error and Renyi entropy segmentation threshold positioning, multi-physical quantity registration is completed through white light interference and infrared thermal imaging, a six-channel feature cube is constructed, and a three-dimensional image is obtained. According to the method, space, spectrum and thermal characteristics are jointly extracted in the multi-head attention convolutional neural network, the confidence coefficient is evaluated in combination with Jensen-Shannon divergence, and the polarization angle and the focal length are dynamically adjusted according to the confidence coefficient, so that closed-loop parameter self-optimization is realized, and the micro-scale pitting corrosion and millimeter-scale crack detection precision is remarkably improved.

A pest control system is disclosed comprising an optical, computational, and monitoring subsystem, optionally mounted on a mobile platform. The optical system may include a neutralizing laser or multi-wavelength light source, discovery and detail cameras (optionally stereo), a beam-steering mechanism, tunable focus, and optional thermal or depth sensors. The processor, such as a GPU or FPGA, identifies insect or biological targets, adjusts laser focus by depth, and controls beam activation. A monitoring system verifies safety by detecting humans or other non-target entities using environmental and thermal cameras; if detected, laser firing is inhibited. The mobile platform may use wheels, propellers, tracks, or cables, with GPS and data links for remote control. A visible light pre-flash may induce a blink reflex before firing. In some embodiments, a scouting drone transmits target coordinates to the neutralization unit, enabling coordinated, efficient, and safe laser-based pest control.

The invention provides an optical lens, which comprises nine lenses from an object side to an imaging surface along an optical axis: a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power; the seventh lens has positive focal power; the eighth lens has negative focal power; and the ninth lens has positive focal power. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the lens has one or more advantages of short focus, miniaturization, large field angle, large aperture, large target surface, low distortion and low sensitivity.

The invention discloses a self-adaptive focal length control method and system of a laser cutting machine, particularly relates to the technical field of laser processing, and is used for solving the problem of insufficient laser focus control precision caused by separation of a detection point and a processing point and geometric mutation of a curved surface in the prior art. Instantaneous distance information is continuously obtained in the moving process of a cutting head, the curvature change characteristics of the surface of a workpiece are calculated according to the instantaneous distance information, inertial load and dynamic load risks caused by geometrical morphology sudden change are comprehensively evaluated, and a path risk section and a non-path risk section are intelligently recognized. A conservative prediction mode and a conventional prediction mode are adaptively switched according to different risk sections, the normal vector of the surface of a workpiece at a laser machining point is accurately predicted, then the posture adjustment amount of the cutting head is calculated according to the normal vector, and finally real-time and smooth posture adjustment of the cutting head in the movement process is achieved through multi-axis synchronous interpolation control. And the laser beam is always vertical to the surface of the workpiece.

To achieve the above objective, the present invention provides the following technical solution: a handheld magnifier with an adjustable focal length, comprising an upper shell and a lower shell. The upper shell is equipped with a protection plate, a display screen, and a silicone key, while the lower shell contains a PVC film. A battery, a keyboard, a main board, a wave wheel, a sector gear, a lens assembly, and a light board are installed between the upper and lower shells. The lens assembly consists of an FPC cable, a chip, a guide fixing seat, a roller, a lens holder, a lens cover, and a glass sheet. Manual precise focusing is achieved through a mechanical transmission structure consisting of a wave wheel, sector gear, and spiral groove. This structure provides a wide adjustable range of clarity to accommodate observation needs at different distances.

The invention discloses a naked-eye 3D display optimization method based on real-time eyeball tracking, and particularly relates to the technical field of naked-eye 3D display, and the method comprises the steps: capturing eyeball movement data in real time through a visual angle tracking sensor, and collecting illumination information in combination with an ambient light sensor; depth perception parameters are calculated based on pupil diameter variation and frequency, and a time sequence prediction type dynamic compensation coefficient is generated in combination with eyeball movement acceleration; acquiring an initial fixation point coordinate by using an improved spherical projection mapping model, and performing compensation coefficient correction to obtain a real-time coordinate; and finally, according to the real-time coordinates, dynamically adjusting the refractive index distribution of the nanostructure layer, the rotation angle of the polarizer, the focal length of the optical lens and other optical modulation parameters. The real-time distance is calculated through the binocular parallax algorithm, the depth mapping value is generated by combining the focal length of the camera and the baseline distance, the method can adapt to the illumination change and the user view angle, and the 3D display effect is optimized.

The invention discloses a high-power microscope intelligent scanning method for a bone marrow smear, which comprises the following steps: S1, automatically dividing a scanning area: acquiring a bone marrow smear image by adopting a front camera, and selecting an optimal scanning area through a multi-dimensional quality evaluation model; s2, intelligent partitioning and focusing point distribution: dividing an optimal scanning area into N * M sub-areas, determining P focusing sampling points by adopting a layered sampling strategy, and establishing a three-dimensional coordinate mapping table; s3, multi-point focusing data acquisition: according to a preset coordinate mapping table, driving an objective table and an objective lens assembly to move to each sampling point in sequence, and constructing an N * M * P-dimensional focusing data matrix; s4, performing focal plane fitting by a least square method: performing three-dimensional plane fitting on the acquired data; and S5, intelligent scanning imaging: calculating the theoretical optimal focal length of each position in the scanning path according to the fitting function, and driving the objective lens assembly to adjust the focal length in real time for scanning imaging. According to the invention, the scanning area identification accuracy and the image definition uniformity are automatically improved in the whole process.

The invention provides an optical lens, which comprises nine lenses from an object side to an imaging surface along an optical axis: a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the fourth lens has negative focal power, and the object side surface of the fourth lens is a concave surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power, and the image side surface of the sixth lens is a concave surface; the seventh lens has positive focal power; the eighth lens has negative focal power; and the ninth lens has positive focal power. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the lens has one or more advantages of short focus, miniaturization, large field angle, large aperture, large target surface, low distortion and low sensitivity.

The invention provides a microscopic automatic focusing method and system based on image gray histogram characteristics, and the method comprises the steps: collecting an image sequence under different focal lengths, carrying out the fuzzy processing, extracting a gray histogram of each frame of image, and calculating the peak position and full width at half maximum of the histogram as the evaluation characteristics of the image definition; calculating the variance of each feature and automatically allocating a weight according to the relative response degree; and finally, comprehensively evaluating the image definition through a weighted definition scoring function, and selecting the focal length corresponding to the image with the optimal score as the optimal focusing position. The method is based on the global features of the gray histogram, is high in anti-noise capability, is adaptive to different imaging scenes through weight adaptive adjustment, is low in calculation complexity, supports real-time focusing, is especially suitable for high-noise fluorescence microscopic imaging scenes, is high in system portability, is low in operation threshold, and effectively improves the accuracy and stability of microscopic automatic focusing.

The invention provides an optical lens, which comprises eight lenses with focal power and sequentially comprises a first lens with negative focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power from an object side to an imaging surface along an optical axis, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the third lens has negative focal power, the object side surface of the third lens near the optical axis is a convex surface, and the image side surface of the third lens is a concave surface; the fourth lens has positive focal power; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has positive focal power; the seventh lens has negative focal power; and the object side surface of the eighth lens is a convex surface, and the image side surface of the eighth lens is a convex surface. The optical lens provided by the invention has one or more advantages of short focus, large field angle, high imaging quality and the like.

The application relates to the technical field of optical lenses, and provides an optical lens, a camera module and electronic equipment, which can solve the problem that the camera module occupies a large space and causes the thickness of the electronic equipment to be large in related technologies. The optical lens comprises a front lens group, a first turning element, a first rear lens group and a second rear lens group; the front lens group comprises a first front lens group and a second front lens group; when the first turning element is located at a first position, the first turning element is located on the image side of the first front lens group and is used for reflecting the outgoing light beam of the first front lens group to the first rear lens group, and the optical lens has a first effective focal length; when the first turning element is located at a second position, the first turning element is located on the image side of the second front lens group and is used for reflecting the outgoing light beam of the second front lens group to the first rear lens group, and the optical lens has a second effective focal length F2, and the second effective focal length is greater than the first effective focal length F1. The application can be used on electronic equipment such as mobile phones.

The present invention provides an automatic focusing method, an electronic device, and a readable storage medium. The automatic focusing method comprises: using a target detection model to detect a target object in an image frame acquired at an initial focal length by an optical imaging device to be focused, so as to acquire a target object detection result; on the basis of the target object detection result, determining whether a target object is present in the image frame; if yes, determining an actual object distance on the basis of the target object detection result and the initial focal length, and on the basis of the actual object distance and a mapping relationship between the object distance and an optimal imaging focal length, determining the optimal imaging focal length; and if not, using a preset search algorithm to search for a focal length until an image having the highest definition value is found, and using a focal length corresponding to the image having the highest definition value as the optimal imaging focal length. The present invention primarily employs a deep learning-based automatic focusing method, supplemented by an image definition evaluation method. Compared with traditional passive focusing methods, the present invention greatly improves the focusing efficiency. Compared with traditional active focusing methods, the present invention eliminates a need for adding an additional optical ranging component, ensuring that the imaging device has a simple structure and a low cost.

The utility model discloses a three-color micro-projection optical system, the three-color micro-projection optical system is provided with an object side and an image side which are correspondingly arranged along an optical axis direction, the three-color micro-projection optical system comprises a diaphragm, a lens group and a color combination prism assembly which are sequentially arranged from the object side to the image side; the color combination prism assembly comprises a color combination prism, a red light-emitting chip, a green light-emitting chip and a blue light-emitting chip; the focal length of the three-color micro projection optical system is f, 5.9 mlt; flt; the thickness is 6.4 mm; the distance from the diaphragm to the image surface is the total optical length TTL and TTLlt of the three-color micro-projection optical system; and the thickness is 10.2 mm. By means of the arrangement, in the environment temperature range of 20-60 DEG C, the optical system does not defocus during working, the MTF full frequency is higher than 0.5, the total length of the optical system can be controlled within 10.2 mm, and the working performance is more stable.

The embodiment of the invention provides an optical machine lens module and AR optical display equipment. The optical machine lens module sequentially comprises a first lens, a second lens, a third lens, a fourth lens, an X-cube color combination prism and a fifth lens from an object side to an image side along an optical axis, the first lens is an aspheric positive lens, the second lens is an aspheric positive lens, the third lens is an aspheric negative lens, the fourth lens is an aspheric positive lens, and the fifth lens is an aspheric negative lens. The total focal length F of the optical machine lens module is more than 4.1 mm and less than 4.8 mm; the focal length f1 of the first lens and the total focal length F meet the condition that f1 / F is larger than or equal to 2.3 and smaller than or equal to 2.9; and the focal length f2 of the second lens and the total focal length F meet the condition that f2 / F is greater than or equal to 2.1 and less than or equal to 2.4.

The invention provides an optical lens, which comprises four lenses with focal power and sequentially comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power from an object side to an imaging surface along an optical axis, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; the image side surface of the fourth lens is a convex surface; wherein the maximum field angle FOV of the optical lens and the real image height IH corresponding to the maximum field angle of the optical lens meet the following conditions: 35 degrees / mmlt; fOV / IHlt; 46 degrees / mm; the focal length f3 of the third lens and the focal length f4 of the fourth lens satisfy 0.5 lt; f3 / f4lt; and 0.8. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the lens has one or more advantages of an ultra-wide angle, a large aperture, high imaging quality, high collimation and the like.

The embodiment of the invention discloses a relative pose calibration method and device of a binocular camera, equipment and a medium, and relates to the technical field of vision measurement, and the method comprises the steps: determining an affine corresponding relation between two lenses in the binocular camera, and respectively determining Pluecker straight lines at different positions; according to the original rotation matrix and the original translation vector of the binocular camera, combining an affine corresponding relation and a Pluecker straight line to construct a generalized camera epipolar constraint model; respectively obtaining attitude information at different positions through an inertial measurement unit, aligning a Y axis of a binocular camera coordinate system to obtain an alignment rotation matrix and an alignment translation vector, and adjusting a generalized camera polar constraint model; and performing polynomial eigenvalue solution to obtain a relative pose. Through geometric model optimization, efficient and robust calibration of the relative pose of the binocular camera under the unknown focal length condition is realized, a plug-and-play calibration solution is provided for a visual system of a dynamic platform, and the technical blank in the field is filled.

According to the infrared fast patrol method based on task sequence control provided by the invention, the robot is guided to pre-adjust the pan-tilt angle and the infrared focal length during advancing through task sequence planning, and the target is intelligently positioned by synchronously utilizing the equipment template library, so that continuous temperature measurement during movement is realized; performing multi-view infrared image comparative analysis on the temperature exceeding equipment through a multi-angle abnormity rechecking strategy; abnormal equipment outside a preset point location is positioned in real time in combination with a laser point cloud map and space coordinate conversion, the parking time of the robot is eliminated, the temperature measurement efficiency is improved, environmental interference is effectively eliminated, the misjudgment rate is reduced, and a high-timeliness and high-reliability global temperature monitoring defense line is constructed for safe operation of industrial equipment.

The invention discloses a low-profile dual-circularly polarized wave beam scanning folding reflection array antenna. The low-profile dual-circularly polarized wave beam scanning folding reflective array antenna comprises a lower reflective array antenna and an upper circularly polarized selection metasurface. A circular polarization plane feed source is integrated in the middle of the reflective array antenna, and beam deflection is achieved. The circular polarization selection metasurface introduces opposite phase gradients to a left-hand circular polarization wave beam and a right-hand circular polarization wave beam through spin decoupling, and then introduces opposite wave beam deflection angles. Meanwhile, due to the polarization selection function of the circular polarization selection metasurface, the profile height of the antenna is half of the focal length of a traditional reflective array. By rotating the lower-layer reflective array antenna and the upper-layer circular polarization selection metasurface, the antenna can realize simultaneous + / -42-degree pitch angle scanning and 360-degree azimuth angle scanning of left-hand circular polarization and right-hand circular polarization dual beams, and the aperture efficiency, the axial ratio, the scanning loss and other performances are good. The low-profile dual-circularly-polarized wave beam scanning folding reflection array antenna provided by the invention can realize simultaneous scanning of two circularly-polarized wave beams, and is low in profile, compact in structure, low in cost and novel in function.

The invention relates to the technical field of optical lenses, provides an optical lens, a camera module and electronic equipment, and can solve the problem that the thickness of the electronic equipment is large due to the fact that the camera module occupies a large space in the prior art. The optical lens comprises a front lens group, a first turning element, a first rear lens group and a second rear lens group, the front lens group comprises a first front lens group and a second front lens group; when the first turning element is located at the first position, the first turning element is located at the image side of the first front lens group and is used for reflecting an emergent light beam of the first front lens group to the first rear lens group, and the optical lens has a first effective focal length; when the first turning element is located at the second position, the first turning element is located at the image side of the second front lens group and is used for reflecting an emergent light beam of the second front lens group to the first rear lens group, the optical lens has a second effective focal length F2, and the second effective focal length is larger than the first effective focal length F1. The method can be applied to electronic equipment such as a mobile phone.

A head-wearable extended reality (XR) device includes an optical assembly. The optical assembly has a display and an optical element. The display is provided to display virtual content to a user of the XR device. The optical element is provided to direct the virtual content from the display along an optical path to an eye of the user. The optical element includes a first portion and a second portion. The first portion provides a first focus distance that corresponds to a first viewing zone of the display. The second portion provides a second focus distance that differs from the first focus distance and corresponds to a second viewing zone of the display.

Lens systems for compact digital cameras having a pop-out state and a collapsed state, the lens systems comprising: an image sensor having a sensor diagonal SD, and a lens with N≥6 lens elements L1-LN arranged along a lens optical axis (OA) starting with L1 from an object side toward an image side, each lens element Li having a respective clear aperture diameter DALi 1≤i≤N, and having in the pop-out state a field of view 35 deg<FOV<50 deg, a f number (f / #), a lens thickness TLens, a back focal length BFL, an effective focal length EFL, and a total track length TTL<20 mm, the lens having in the collapsed state a collapsed total track length c-TTL, wherein c-TTL=TLens+1 mm, wherein EFL≥10 mm, wherein f / #<2, and wherein a ratio c-TTL / EFL<0.8.

The device comprises a box body and a measuring assembly arranged in the box body, the measuring assembly comprises a laser emitting unit, a lens unit, a focal length adjusting unit and a height adjusting unit, the height adjusting unit is arranged on the upper side in the box body, and the focal length adjusting unit is arranged at the bottom of the height adjusting unit. The laser emitting unit is arranged at the bottom of the focal length adjusting unit, and the lens unit is arranged at the bottom of the focal length adjusting unit and located on one side of the laser emitting unit. Through the collaborative design of the convex lens and the laser emission unit, the optical path reversibility principle of the convex lens is utilized, and dependence on a small-size and low-emission-port-height special-specification laser emitter is not needed. Even if a laser transmitter with a conventional size is adopted, refracted laser can be infinitely close to the ground, and tiny protrusions can be accurately recognized and measured.

The invention belongs to the field of ocean robots, and particularly relates to an underwater acousto-optic fusion sensing method and system based on multi-scale space-time alignment. According to the invention, environment parameter data, a target distance and a low-resolution image are acquired through the data acquisition layer; establishing an acoustic effective distance model and an optical effective distance model, and generating acoustic features, optical features and a distance-confidence mapping function; adjusting the focal length and the wavelength and generating a 4K image; carrying out acousto-optic feature fusion through the acoustic features, the optical features and a confidence coefficient function, and outputting fusion features; performing observation updating by using space-time asynchronous compensation and motion prediction; according to the method, starting point and detection are utilized, system parameters are updated in real time through a multi-target algorithm, a sensing-optimization-feedback-iteration closed loop is formed, and the full-distance environment adaptability is improved. According to the invention, the problem of data fusion fault caused by inconsistent sensing distances of acoustic and optical sensors is solved, and high-precision target identification and positioning with full-distance coverage are realized.

The invention discloses an automatic test method and device based on a camera and an electronic device, and the method comprises the steps: configuring a test environment which comprises an adjustable light source and a standard test graphic card; the brightness and color temperature of the adjustable light source and the focal length and exposure parameters of the to-be-detected camera are automatically adjusted through the control module; controlling the to-be-tested camera to acquire an image of the standard test graphic card, and transmitting the acquired image to an image processing module; the image is analyzed through an image processing module, and the resolution, the color rendition degree, the noise level and the distortion rate are calculated; and generating a test report according to an analysis result, and judging whether the to-be-tested camera is qualified or not. According to the scheme provided by the invention, the adjustable light is automatically controlled to test the camera, the cost of a test task is reduced, the test efficiency is improved, and in addition, the camera test precision is improved through various abundant test conditions.

The utility model relates to an ultra-wide-angle lens, which is arranged along an optical axis in a direction from an object side to an image side. The utility model relates to a multi-lens zoom lens, which sequentially comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with positive focal power, a fifth lens, a sixth lens with positive focal power, a seventh lens with positive focal power, an eighth lens with negative focal power and a ninth lens with positive focal power, the object side surface of the sixth lens is convex; the optical total length TTL, the total focal length f and the image height H under the maximum field angle of the ultra-wide-angle lens meet the following relation: TTL * f / H is more than or equal to 6.9 and less than or equal to 7.4. The ultra-wide-angle lens of the utility model at least has one of the characteristics of large field of view FOV > = 196 DEG optical total length, good thermal stability, high resolution, large aperture (FNO < = 1.8), high illumination and the like.

A visual optical system comprises a first optical system and a second optical system. The first optical system comprises a first lens having a positive refractive power, a reflective polarizing element, a quarter-wave plate, a second lens having a refractive power and a third lens having a positive refractive power. The second optical system comprises, sequentially along a second optical axis from the first side to the second side, first to sixth lens elements. An effective focal length f3′ of the third lens, a distance TD′ from a first-side surface of the first lens to a second-side surface of the third lens on the first optical axis, an effective focal length f1 of the first lens element and a distance TD from a first-side surface of the first lens element to a second-side surface of the sixth lens element on the second optical axis satisfy: 1.9<(f3′ / TD′) / (|f1| / TD)<5.7.

The invention discloses a compact internal focusing type standard photographic lens and a photographic device. The photographic lens sequentially comprises a first lens group with positive focal power, an aperture diaphragm, a second lens group with positive focal power and a third lens group with negative focal power from an object side to an image side, in the focusing process, the second lens group moves along the optical axis, and the first lens group and the third lens group remain unchanged relative to the position of the image plane. The first lens group, the second lens group and the third lens group satisfy the following conditional expressions: 1 < = F1 / F < = 2; 0.2 < = F2 / F < = 1; -3 < = F3 / F < = 0; wherein F1 represents the composite focal length of the first lens group, F2 represents the composite focal length of the second lens group, F3 represents the composite focal length of the third lens group, and F represents the focal length of the photographic lens. The compact internal focusing type standard photographic lens provided by the technical scheme of the invention is beneficial to optimization of optical performance, focusing mechanism, positive and negative focal power balance and simplification of design and manufacturing of the lens.

The utility model relates to an eyepiece lens, which sequentially comprises a first lens with positive focal power, a second lens with positive focal power, a third lens with negative focal power and a fourth lens with positive focal power along an optical axis from an object side to an image side, the focal length F1 of the first lens and the combined focal length F23 of the second lens and the third lens meet the following relation:-0.99 < = F1 / F23 < = 0.29. The eyepiece lens at least has one of the characteristics of large exit pupil distance, low cost, light weight, small volume, simple structure and the like.

A wide angle zoom projection lens, which from the magnifying side to the narrowing side of the lens sequentially comprising: a first lens group with negative diopter, a second lens group, a third lens group with positive diopter, a fourth lens group with positive diopter, a fifth lens group with positive diopter, a sixth lens group with positive diopter, and an aperture in the lens; during the zooming, the first lens group and the sixth lens group are fixed, the second to fifth lens groups move along the optical axis to achieve changes in focal length; The front lens of the first lens group closest to the magnifying side of the lens is an aspherical lens with negative diopter to achieve a wide angle effect.

A communication module including a primary radiator for transmitting an electromagnetic flux, and an electromagnetic flux controlling member for controlling a travelling direction of the electromagnetic flux sent from the primary radiator. The electromagnetic flux controlling member includes an incidence surface and an emission surface. The incidence surface and the emission surface are configured such that the electromagnetic flux emitted is expanded than the electromagnetic flux transmitted from a focal position of a reference lens optimized to collimate the electromagnetic flux from the primary radiator and emitted after incidence on the reference lens on a basis of an emission angle of the electromagnetic flux emitted from the primary radiator, a dielectric constant of the electromagnetic flux controlling member, and an arbitrarily set focal length of the electromagnetic flux controlling member.