69 results about "Central field" patented technology

The invention relates to a near-ground different-angle wind field laser wind measurement radar antenna and a wind measurement laser radar, and relates to the technical field of laser wind measurement, and the near-ground different-angle wind field laser wind measurement radar antenna comprises an optical lens, a channel seat, a flange adjusting assembly and an optical fiber connector. An objective lens group composed of a plurality of lenses is arranged in the optical lens, one end of the channel seat is connected with the optical lens, a flange seat mounting plate is arranged at the other end of the channel seat, the flange adjusting assembly comprises a middle flange assembly and a plurality of peripheral flange assemblies, and the middle flange assembly is arranged in the middle of the flange seat mounting plate. An optical fiber connector is arranged at the end part of the middle flange assembly to form a middle view field channel; the multiple peripheral flange assemblies are arranged at different positions of the lower portion of the flange base mounting plate in a scattered mode, the end of each peripheral flange assembly is provided with an optical fiber connector, multiple peripheral view field channels are formed, and the measurement effect of the near-ground wind field can be improved.

The invention provides a query configuration method and system, and the method comprises the steps: carrying out the personalized processing of a basic query configuration template based on the context information of a first user, and obtaining a target query configuration template; analyzing the target query configuration template into an executable structure through a strategic rendering engine, and driving a front-end component to render and generate a target query interface according to the executable structure; in response to a query request initiated by the first user on the target query interface, assembling query parameters of a uniform structure and initiating the query request to a target service; and receiving a query result returned by the target service, normalizing the query result according to a result mapping rule of the basic query configuration template, and rendering and displaying the query result on the target query interface. Large-scale multiplexing and refined management and control of configuration are realized through separate design of a configuration warehouse and a central field library, and personalized processing of query configuration is realized by combining static context and dynamic context.

The invention discloses a free-form surface imaging aberration propagation calculation and aberration control method. According to the method, on the basis of a given system light path, an object plane, an image plane, an entrance pupil and an exit pupil of each optical curved surface are calculated, and reference wave surfaces of a central view field at the entrance pupil and the exit pupil are calculated. A group of characteristic light is generated by an entrance pupil and a field of view of the sampling system, the optical path difference of the characteristic light of each field of view propagating from the entrance pupil of each curved surface to the exit pupil relative to the main light is calculated, and the aberration field of each curved surface is obtained by fitting the optical path difference of the full field of view; determining the contribution of each curved surface to the dominant aberration according to the dominant aberration of the current system and the aberration field of each curved surface, thereby determining the curved surface which is optimized first; the aberration is reduced by optimizing the curved surface parameters, corresponding to the current dominant aberration, of the curved surface, and the process is repeated until the design meets the requirements. The method can effectively guide the optimization of the free-form surface imaging system, reduces the deviation degree of the free-form surface while guaranteeing the imaging performance, and effectively reduces the processing and detection difficulty of the surface.

The present application relates to a remote operation device, a remote driving system, a remote operation method, and a computer-readable medium recording a remote operation program, the remote operation device driving a vehicle by remote operation from outside the vehicle, the remote operation device including: an image acquisition unit acquiring a surrounding image of the vehicle from the vehicle; a first display unit displaying the surrounding image of the vehicle; and a second display unit displaying an object moving from a central field of view area side toward a width direction end portion in a peripheral field of view area other than the central field of view area of the first display unit, disposed on an upper side, or a lower side, or the upper side and the lower side of the first display unit.

The invention discloses a fixed-focus optical system with focal length changing along with view field, which belongs to the technical field of optical imaging and comprises a lens group, the lens group is provided with at least one free-form surface lens, so that the focal length of the system continuously changes along with the view field angle under the condition that all lenses and an image surface are kept still, and the central view field of the system is equivalent to a long-focus camera. The edge field of view is equivalent to a short-focus camera, the field of view and the resolution of the system are improved, and large-field-of-view angle detection and small-target high-precision recognition can be met at the same time. According to the fixed-focus optical system with the focal length changing along with the view field, a focusing mechanism does not need to be additionally arranged, capturing and recognition of the system on a target and simplicity, convenience, practicability and light weight of the system can be well considered, and the application requirements of miniaturization, light weight and low cost of modern photoelectric equipment are met.

This invention relates to the field of vehicle design technology and discloses a method and apparatus for determining the display area of ​​a combination instrument cluster. The method includes: acquiring first simulated data of the steering wheel, second simulated data of the user's eye ellipse, and third simulated data of the combination instrument cluster display surface; determining a central field of view region based on the first simulated data, the third simulated data, and simulated data of the central eye point; translating the central field of view region based on the simulated data of the central eye point, at least one simulated data of an extreme eye point, and the third simulated data to obtain at least one extreme field of view region corresponding to each of the at least one extreme eye point simulated data; and determining the display area of ​​the combination instrument cluster based on the central field of view region and the at least one extreme field of view region. Applying the technical solution of this invention can meet the vision requirements of users of different body types, making the design position of the combination instrument cluster universally applicable.

The invention discloses a plasma field uniformity adjusting device which comprises a cavity cover, a coil, a first adjusting piece, an air nozzle and a second adjusting piece, and through the first adjusting piece and the second adjusting piece, when a small-size wafer is processed or the plasma concentration of a central area needs to be increased, the coil can rotate and contract centripetally so as to increase the central field intensity; the gas nozzle can be close to the center of the working cavity to increase central gas concentration; when a large-size wafer is processed or the plasma concentration of a central area needs to be reduced, the coil can be centrifugally rotated and diffused to reduce the central field intensity, and the gas nozzle can be far away from the center of the working cavity to reduce the central gas concentration; the distribution of plasmas can be improved in a targeted manner by winding and unwinding the coil or changing the radial position of the air tap; and through cooperative adjustment of the coil and the gas nozzle, dynamic matching of plasma distribution and reaction gas conveying can be realized, and improvement of process uniformity and equipment adaptability is facilitated.

The invention relates to the technical field of optical fiber design, in particular to an optical fiber arrangement optimization method, device and equipment and a storage medium, according to the method, a deviation angle is calculated by correcting light cone parameters so that angle correction can be conducted on each optical fiber, and accurate matching between an optical fiber array and light cone distribution of all points of an image plane can be achieved; a single optical fiber captures echo signals of a specific view field, the view field range can be expanded without depending on increase of the number of detectors, and therefore the detector array scale is remarkably reduced while the wide view field detection capacity is guaranteed; besides, differentiated correction is carried out on each optical fiber, so that the field curvature and distortion phenomena of the optical system can be systematically compensated, and the optical fiber coupling efficiency of an edge view field is maintained at a relatively high level of a central view field; meanwhile, a fusion correction mechanism of software simulation data and actually measured data is adopted, so that the alignment deviation of the optical fiber central axis and the center of the light cone can be effectively reduced, the optical fiber coupling efficiency is greatly improved, the light energy loss is reduced, and the detection signal-to-noise ratio of weak echo signals is further improved.

The invention provides a method and equipment for applying fuzzy stimulation to the monocular or binocular of a user, and the method comprises the steps: obtaining a fixation point corresponding to the monocular or binocular of the user to determine a fixation region corresponding to the monocular or binocular of the user, and determining a central region and a peripheral region in the fixation region; forming a training image set with a clear central area and at least partial area in a peripheral area in the gazing area, and applying fuzzy stimulation to the monocular or binocular of the user by at least one training image in the training image set; wherein the central area corresponds to a central view field determined by a monocular or binocular fixation point of the user, the peripheral area corresponds to a peripheral view field determined by the monocular or binocular fixation point of the user, and the training image set comprises at least one training image. According to the invention, fuzzy stimulation is applied to the monocular or binocular of the user based on the fixation point corresponding to the monocular or binocular of the user.

The application provides a design method of a high-uniformity Bitter coil, belongs to the field of Bitter coils, and calculates the maximum electromagnetic stress of a first Bitter coil; the thickness of a Bitter sheet is gradually increased according to a set increment on the basis of the thickness of the Bitter sheet to obtain the thickness of the Bitter sheet, a second Bitter coil is obtained, the turns of the coil in the central region of the first Bitter coil are replaced by the turns of the second Bitter coil, a new coil is obtained, the number of turns is gradually increased by 1 turn as a step from 1 turn, and the number of turns of the coil with a magnetic field uniformity less than a set value and a coil height less than a set height is obtained; the central field of the coil is calculated, and the number of turns with the highest central field is selected; and the application also provides the Bitter coil; and the workload of processing the annular conductive pad is saved.

The utility model relates to an optical lens with high efficiency and high central field-of-view image resolution and a light-emitting assembly. The optical lens comprises a first lens, a second lens, a third lens, a fourth lens and an image surface which are arranged in sequence, the surfaces of the first lens, the second lens and the third lens are aspheric surfaces, and the Abbe coefficient of the second lens is lower than that of the other three lenses; the first surface and the second surface of the second lens are bent towards one side far away from the image surface; the vignetting diaphragm is arranged on the first surface, far away from the image surface, of the fourth lens; and the aperture diaphragm is arranged on the first surface or the second surface of the first lens, and the distance between the aperture diaphragm and the vignetting diaphragm is 23-50 mm. The lighting efficiency is high; the surfaces of the first lens, the second lens and the third lens are aspheric surfaces, so that the transverse chromatic aberration is optimized, and the abbe coefficients of the other three lenses are higher than that of the second lens, so that the overall transverse chromatic aberration is reduced; by setting the distance between the aperture diaphragm and the vignetting diaphragm, the imaging quality of the central view field can be improved.

The present invention specifically relates to a method for detecting the position change of a high-voltage switch in a substation, and belongs to the technical field of substation equipment detection. When collecting electric field strength, the present invention obtains the central field strength and the edge field strength through differential conditioning of the central voltage and the edge voltage, and eliminates the interference in the substation and the interference of the conditioning itself by subtracting the central field strength and the edge field strength, so that the collected field strength is more accurate, which can be more beneficial to the position change of the high-voltage switch; the present invention uses the field strength of the current transformer and the A, B and C phases of the high-voltage switch to form a field strength array, and detects whether the high-voltage switch has changed position through the change of the field strength array. It can not only reliably judge the opening and closing of the high-voltage switch, but also judge and verify the characteristics of the high-voltage switch when opening and closing, and provide a judgment basis for the opening and closing quality of the high-voltage switch.

The invention discloses a laser communication rapid capturing method, device and equipment and a storage medium, and relates to the technical field of satellite laser communication, and the method comprises the steps: obtaining ground station geographic information, satellite attitude information and satellite orbit information; correcting and compensating a ground offset vector of a target ground station relative to an imaging center point based on the ground station geographic information, the satellite attitude information and the satellite orbit information, and determining a space pointing vector; based on the space pointing vector, mapping an angular offset of a target ground station in a corresponding target coordinate system relative to a camera center view field axis into an initial aiming pointing instruction; and driving an optical axis of the laser communication terminal to directly point to a corresponding initial aiming position according to the initial aiming pointing instruction, so that the laser communication terminal captures beacon light emitted by a ground station by taking the initial aiming position as a center.

A method is provided for visualizing optical information in the central field of vision of a driver in such a way that a display (5) in the form of a virtual image is superimposed on a real traffic environment. A position of the display (5) is dynamically variable as a function of a vehicle speed, a steering angle, and a road type. Thus a horizontal and / or vertical spread of a display range (8) between a first maximum value (9) and a second maximum value (10) within which the display (5) can be displayed is varied as a function of speed, steering angle and roadway type.

The present disclosure provides a system for optical detection of an eye, comprising: a light emitting assembly configured to form an incident light ray array comprising a plurality of incident light rays parallel to a chief ray; a half mirror configured to reflect the incident light ray array at an angle to an optical axis of the system for forming a plurality of chief rays parallel to the optical axis of the system; a first objective lens having an optical axis coinciding with the optical axis of the system for converging the plurality of chief rays formed via the half mirror reflection onto a pupil plane of a measured eye so as to form a spot array on a retina of the measured eye; and a photodetector configured to acquire a spot array image corresponding to the spot array for detecting optical performance of the retina of the measured eye. The present disclosure can simultaneously measure optical imaging quality of a central field of view of the retina along an optical axis direction and optical imaging quality of a peripheral field of view of the retina to achieve fast detection of optical quality of the eye for a wide field of view on and off the optical axis.

The invention provides a common-light-path imaging optical system and method based on visible light and infrared light, and belongs to the technical field of optical imagines.The system comprises a common-light-path receiving device, a light splitting light path, an infrared detection light path and a visible light detection light path, the light splitting light path is arranged at the light output end of the common-light-path receiving device, and the infrared detection light path is arranged at the light output end of the visible light detection light path; and the infrared detection light path and the visible light detection light path are respectively connected with the light output end of the light splitting light path. A visible light and infrared light common-path design is adopted, a common lens enables dual-band light to be transmitted along the same light path, imaging differences of a central view field, image height, geometric distortion and the like caused by different parameters of an optical axis, a focal length and the like of a traditional dual-light-path system are fundamentally eliminated, and the consistency of dual-band imaging targets is ensured. And the small focal length and large aperture design is realized through simulation matching of the lenses with different materials and curvatures, the field angle of the optical system reaches + / -30 degrees, a larger and wider irradiation and imaging range can be realized under the same optical path, and the application requirement of large-field imaging is met.

A remote machine manipulation system includes: a shooting unit that shoots an image of a remote machine that is remotely manipulated; and a visual presentation apparatus that receives the image shot by the shooting unit and presents an operator who manipulates the remote machine with the image by displaying the received image, the visual presentation apparatus including: a communication situation monitoring unit that detects a communication situation in the reception of the image; and a presented image control unit that determines a central field-of-view region and a peripheral field-of-view region in a display region in which the image is displayed and determines, on the basis of the communication situation detected by the communication situation monitoring unit, an image parameter related to a transmission rate of a central field-of-view image displayed in the central field-of-view region and a peripheral field-of-view image displayed in the peripheral field-of-view region.

For example, a Head Mounted Display (HMD) may include a central display configured to display a first image in a central Field of View (FoV) based on an image scene to be displayed to a pupil of a user; a central lens configured to direct light of the first image toward the pupil of the user, a peripheral display configured to display a second image in a temporal FoV based on the image scene; and a peripheral lens configured to direct light of the second image toward the pupil of the user, the peripheral lens is tilted at a tilt angle relative to the central lens.

This disclosure pertains to the field of optical devices, specifically relating to eyeglasses, comprising: a frame including a track extending in a predetermined direction; a first stimulation module slidably connected to the track for sliding along the track; the first stimulation module having a first defocus stimulation region; and a second stimulation module slidably connected to the track for sliding along the track; the second stimulation module having a second defocus stimulation region. When the first and second stimulation modules are installed in the same side of the frame, a blank area is formed between the first and second defocus stimulation regions. The first and second stimulation regions correspond to the peripheral field of vision of the human eye, and the blank area corresponds to the central field of vision of the human eye. By sliding the first and second stimulation modules on the track, the positions of the first and second defocus stimulation regions in the field of vision of the human eye are changed, thereby changing the position and extent of the blank area. This is intended to inhibit axial elongation and control the degree of myopia.

The invention provides an optical lens group for improving the resolutions of a central view field and a surrounding view field. The optical lens group is composed of a first lens, a second lens, a third lens, an aperture, a fourth lens, a fifth lens and a sixth lens in sequence from an object side to an image side, the optical lens group satisfies the following conditional expressions: 0.6 lt; aT12 / AT34lt, AT12 / AT34lt; 3.8); wherein AT12 is an air interval between the first lens and the second lens, and AT34 is an air interval between the third lens and the fourth lens; -1.4 lt,-1.4 lt; f5 / EFLlt; 5.7, 5.7; wherein f5 is the focal length of the fifth lens, and EFL is the effective focal length of the optical lens group; -1.7 lt,-1.7 lt; r10 / f5lt; 1.8); wherein R10 is the curvature radius of the image side surface of the fifth lens. Therefore, the resolution of the central field of view and the surrounding field of view can be improved, the refractive power of the lens can be adjusted to correct aberration, and correction of high-order aberration and astigmatism can be facilitated.

An electronic device that can easily increase the viewing angle and has a reduced screen-door effect is provided. In the electronic device, images displayed on a display panel with a low pixel density and a display panel with a high pixel density are synthesized to be seen. The electronic device includes a first display panel that has a relatively large screen size and a low pixel density, and a second display panel and a third display panel each of which has a relatively small screen size and a high pixel density. The electronic device is configured such that visual information enters the central field of view from the second display panel or the third display panel and visual information enters the peripheral field of view from the first display panel. Such a configuration can easily increase the viewing angle and reduce the screen-door effect.

The application relates to a camera stabilizing and target tracking system and method based on a robotic fish, which comprises a holder control mechanism, a camera, a fish body control mechanism, a fish head posture sensor, a fish body posture sensor, a first controller and a second controller; the second controller comprises an image processing unit, a heading target angle controller and a feedforward controller; the application calculates the rotating angle of the holder by the horizontal distance between the target and the image point collected by the camera and the shaking angle of the robotic fish, so that the camera is more stable; and the swinging angle of the robotic fish is calculated according to the horizontal distance obtained above and the actual heading angle of the fish body measured by the fish body posture sensor, so that the robotic fish swims towards the target, the field of view of the robotic fish can be adjusted, and the target is always in the central field of view of the robotic fish.

The utility model relates to the technical field of large-breadth infrared telecentric lens scanning, and discloses a large-breadth flange type telecentric field lens, and the main body of the field lens comprises a lens barrel and five lenses which are sequentially arranged along the light beam propagation direction. The first lens is of a biconcave structure, and the focal length is negative. The second lens is of a meniscus structure, and the focal length is positive. The third lens is meniscus-shaped, and the focal length is positive; the fourth lens is in a large-aperture plano-convex shape, and the focal length is positive; the fifth lens is a protective window lens and is in a large-aperture biplane shape, and the focal length of the fifth lens is infinite. And each lens is fixed in the lens cone through a threaded pressing ring. The focal length of the field lens main body is F420, the processing breadth is 200 * 200 mm, the central field angle is less than 0.5 degree, and the edge field angle is less than 3 degrees. Through reasonable optical design, combination of long focal length and large breadth processing is realized, the problems that an existing field lens is short in applicable focal length range and can only be used for small breadth processing are solved, and applicability and flexibility of the field lens in an industrial processing scene are effectively improved.

The present invention discloses a method for calculating the propagation of aberrations and controlling aberrations in free-form surface imaging. Based on a given system optical path, the method calculates the object plane, image plane, entrance pupil, and exit pupil of each optical surface, and calculates the reference wavefront of the central field of view at each entrance pupil and exit pupil. The entrance pupil and field of view of the sampling system are used to generate a set of characteristic rays, and the optical path difference of the characteristic rays of each field of view from the entrance pupil of each surface to its exit pupil relative to the principal ray is calculated. The aberration field of each surface is obtained by fitting the optical path difference of the entire field of view; the contribution of each surface to the dominant aberration is determined based on the current system dominant aberration and the aberration field of each surface, thereby determining the surface to be optimized first; the aberration is reduced by optimizing the surface parameters corresponding to the current dominant aberration of the surface, and the process is repeated until the design meets the requirements. This method can effectively guide the optimization of the free-form surface imaging system, reduce the deviation of the free-form surface while ensuring imaging performance, and effectively reduce the difficulty of surface processing and detection.

The utility model discloses a laser transmit-receive system of a laser radar and the laser radar thereof, and the system comprises a rotating mirror which rotates around a rotating shaft; the emission unit array emits M emission light beams and emits the M emission light beams to the environment through the first mirror surface of the rotating mirror, the emission unit array comprises N emission unit sub-arrays, and the N emission unit sub-arrays are arranged in the extension direction of the rotating shaft; the N groups of transmitting lenses are in one-to-one correspondence with the N transmitting unit sub-arrays, and the N groups of transmitting lenses are arranged along the extension direction of the rotating shaft; the receiving lens is used for receiving M echo light beams of the M emission light beams through the second mirror surface of the rotating mirror; and the receiving unit array is arranged corresponding to the transmitting unit array and is used for receiving the M echo light beams. According to the utility model, aberration can be improved, the size of a laser transmit-receive system is compressed, the adjustment efficiency of transmit-receive laser signal alignment is improved, and the heat dissipation efficiency is improved. The resolution ratio of the central field of view of the laser radar is doubled by means of the arrangement of the photoelectric detection array.

The present application relates to a kind of products and methods for expanding the field of view of optical waveguide, the product includes waveguide sheet, coupling-in prism, array reflection film and optical wedge array;After the incident light enters the waveguide sheet as central field of view light after the coupling-in prism, the array reflection film is arranged in the inside of the waveguide sheet;The angle between the array reflection film and the total reflection surface of the waveguide sheet is θ, by changing the angle of the coupling-in prism, so that the incident angle β of the central field of view light in waveguide sheet is >2θ;The optical wedge array is arranged at the total reflection surface of the waveguide sheet exit;The optical wedge array is used to make the light of central field of view perpendicular to the total reflection surface of the waveguide sheet when entering human eye, in line with the viewing habits of human eye;The optical wedge array is composed of multiple single optical wedges in succession.

The embodiment of the invention discloses an optical waveguide, a detection module and a near-to-eye display module, the optical waveguide comprises a waveguide substrate, a coupling-in area, a coupling-out area and a detection coupling-out area, the coupling-in area enables image light to be coupled into the optical waveguide and transmits the image light to the coupling-out area, and the coupling-out area is used for detecting the coupling-out area. The coupling-out area is used for expanding and propagating the image light and coupling out a part of the expanded image light, and the detection coupling-out area is arranged on a light path of the image light which passes through the coupling-out area and is continuously propagated in the waveguide substrate; the position where the detection out-coupling area is arranged is related to light corresponding to a central view field of an image coupled into the optical waveguide, and the detection out-coupling area is used for coupling out part of the image light for detection.

To provide an optical system with high light utilization efficiency. [Solution] The optical system includes a projection unit (120) that projects light from a display element (190) to form a first pupil (130), and a light guide element (110) that guides light from the projection unit to the eye point. The light guide element has a reflecting unit (150) that forms a second pupil (171) at the eye point. The reflecting unit comprises a plurality of pairs of reflecting surfaces (210), each consisting of a first and a second reflecting surface. In a first cross-section including the normals of the first and second reflecting surfaces, when the angle between the light incident on the first reflecting surface and the second reflecting surface is α(°), and the angle between the light reflected by the second reflecting surface and the first reflecting surface is β(°), with respect to the principal ray of the central field of view, 0 ≤ |α| ≤ 20 0 ≤ |β| ≤ 20 The conditions are met.

A wearable display system including a plurality of cameras and a processor is disclosed. A grayscale camera and a color camera may be arranged to provide a central field of view associated with the two cameras and a peripheral field of view associated with one of the two cameras. One or more of the two cameras may be plenoptic cameras. The wearable display system may acquire light field information using at least one plenoptic camera and create a world model using the first light field information and first depth information stereoscopically determined from images acquired from a grayscale camera and a color camera. The wearable display system may track a head pose using at least one plenoptic camera and a world model. When an object satisfies a depth criterion, the wearable display system may track the object in the central field of view and the peripheral field of view using one or two plenoptic cameras.

The utility model provides an irrigation drainage channel suitable for a high-standard farmland in a hilly area. The irrigation drainage channel comprises a channel bottom, channel surfaces on two sides of the channel bottom and a channel top on the top of the channel surfaces, the channel bottom is a cast-in-place concrete bottom plate, the channel surfaces are composed of multiple layers of prefabricated concrete bricks, the channel top is a prefabricated concrete brick coping, and the prefabricated concrete bricks are arranged on two sides of the cast-in-place concrete bottom plate along side slopes; a middle field ridge is arranged on the side of the irrigation drainage channel, at least one drainage opening is formed in the channel surface of the irrigation drainage channel and located at the upstream of the middle field ridge, and at least one irrigation opening is formed in the channel surface of the irrigation drainage channel and located at the downstream of the middle field ridge; a side ditch is arranged on the outer side of the water pipe of the irrigation opening, and a stilling pool is arranged at the bottom of the side ditch. The channel structure combining the prefabricated concrete bricks and the concrete cast-in-place bottom plate is adopted, the construction technology is optimized, the construction period is shortened, the construction cost is low, the roughness of a water passing section is low, the water conveying and drainage effects are obvious, and good irrigation benefits are achieved; the stilling pool is arranged to prevent water from scouring the outer slope of the field ridge and the downstream field during irrigation.