2754 results about "Field angle" patented technology

At least one antenna array including three mutually orthogonal antennas each sharing a common center point senses an electromagnetic signal emitted by a buried object such as a utility line, pipe or sonde. A circuit at least partially mounted in a housing is connected to the array and determines a location of the buried object by measuring signal strength and field angles in three dimensions without having to align the antenna array relative to the buried object while eliminating nulls and false peaks. A graphical user interface (GUI) has user-friendly icons, symbols, menus, numbers and graphical and auditory representation of signal strength. A SEARCH view indicates signal strength by showing a rotating strength indicator, a trace mode MAP view in which line location is shown by a line that moves side-to-side, and a sonde mode MAP view in which sonde location is shown by a moving line, pole and equator.

A method for capturing a digital panoramic image includes projecting a panorama onto an image sensor by means of a panoramic objective lens. The panoramic objective lens has a distribution function of the image points that is not linear relative to the field angle of the object points of the panorama, such that at least one zone of the image obtained is expanded while at least another zone of the image is compressed. When a panoramic image obtained is then displayed, correcting the non-linearity of the initial image is required and is performed by means of a reciprocal function of the non-linear distribution function of the objective lens or by means of the non-linear distribution function.

A head-mounted camera of the present invention includes the following elements. A first image pickup device includes a first photographing optical system that can change the focal distance and a CCD for converting a subject image formed by the first photographing optical system into an image signal. A see-through image display portion displays a photographic frame indicating the photographic range as a virtual image so that it is superimposed on a subject substantially directly observed by a photographer. A remote controller includes a second operation switch for setting the visual angle of the photographic frame when viewed from the photographer. A controller/recorder includes a first CPU for setting the focal distance of the first photographing optical system so that the visual angle of the photographic frame set by the second operation switch coincides with the field angle of the first image pickup device.

A system designs a thin and relatively flat microwave focusing lens that can produce multiple simultaneous beams, using readily-available isotropic dielectric materials, and having a gradient-index (GRIN) profile. The design optimizes the lens to achieve beam scanning and/or multiple beams over a wide field of regard (FOR) with broad bandwidth and a very short focal length compared with conventional lenses. The lens can be used individually or as an element in a more complex antenna having multiple lenses in various orientations that are independently switched, selected and/or excited simultaneously as elements in a phased array. The antenna terminal incorporates such lens into an array of lenses along with one or more feeds to produce single or multiple beams covering a broad field of regard for such applications as satellite communications on-the-move, cellular, broadband point-point or point-multipoint and other terrestrial or satellite communications systems. The lens and array design support multiple simultaneous independently steerable beams as well as null placement for interference cancellation.

A display apparatus and an imaging apparatus constructed such that a high-resolution clear three-dimensional video image can be viewed from any direction. The display apparatus projects frame images, projected from a projector such as an electronic projector, to a video image projection surface of a three-dimensional screen through a polygonal mirror provided around the three-dimensional screen, thereby providing a polyhedral video image such as a three-dimensional image to a person viewing from around the video image projection surface. The three-dimensional screen has a view field angle limiting filter and a directional reflection screen. The view field angle filter limits the angle of a view field in the left/right direction, the angle being the angle of the projection on the video image projection surface (50) of the screen. The directional reflection screen has two sheets in horizontal and vertical directions. Furthermore, a projection light path between the electronic projector and the polygonal mirror is formed by refracting light through an auxiliary mirror.

The invention is a video frequency real-time displaying control device for infrared heat imaging image and visible image. The device includes a computer, an infrared heat imaging device, visible camera whose field angle can match with it; there has a video collecting card on the interface slot of the computer, the infrared image device and the visible camera are fixed on the same platform; there stores control, temperature measuring, image processing and displaying procedure model, it can remote control the platform, the infrared heat device and the visible light camera, they can be rotated synchronously, the field angles of the posterior two match, and makes the heat imaging image and the visible light image can coincided with the coordinate of the computer monitor. The invention can carry on real-time memorization, displaying, imaging, and playbacks the heat imaging image and the visible light image, it also can display the temperature valve and position coordinates of the object, it also has merits of infrared imaging and visible light image.

The invention discloses a method for taking photos through different field angle cameras and a terminal to acquire high-quality photos. The method comprises the steps that the imaging amplifying multiple required by a user at present is judged, one camera in the different field angle cameras is started to carry out shooting according to the relation between the imaging amplifying multiple required by the user at present and the multiple threshold, and the taken photos are output after digital zoom is carried out. According to the method, one camera in the different field angle cameras is started to carry out shooting according to the relation between the imaging amplifying multiple required by the user at present and the multiple threshold, and then digital zoom is carried out on the taken photos. Due to the fact that the field angles of the cameras are different and the obtained photos are different in definition, when the different field angle cameras are selected to take photos according to the difference of the photo amplifying multiple of the user, the photos are good in photo quality, and the high-quality photos can be obtained.

A method and a device for airborne laser scanning flying height change real-time compensation can eliminate adverse effect of flying height change to a laser scanning point cloud distribution area and cloud density of a laser scanning point. When the flying height of an airborne platform is changed, a flying height change value is acquired by a global position system(GPS)/ inertial navigation system(INS)integrated measurement device, the value of a scan field angle which can keep the width of a scanning stripe unchanged and the value of a laser pulse frequency which can keep the laser scanning point cloud density unchanged are calculated in a flying height compensation controller. A rotating prism photoelectric shaft angle encoder measures and obtains a real time rotating angle of a rotating prism and offers the real time rotating angle of the rotating prism to the flying height compensation controller, a square signal which is identical with an expect laser pulse frequency value is outputted only within a scope of the required scan field angle and offered to a laser pulse transmitter, thus a laser transmitter can launch a laser pulse of the corresponding frequency. By using the compensation method, the flying height change of the airborne platform can not affect the laser scanning point cloud distribution area and cloud density of a laser scanning point permanently.

Visual-field information including information on sight-line direction (theta, phi) and on field angle (gamma) in visual-field area of input fish-eye image is input in real-time. From the input visual-field information, a drawing area of a plane is calculated in real-time that is orthogonal to the sight-line direction and has an extent determined by the field angle. A pixel position in the fish-eye image that corresponds to each pixel position in the calculated drawing area is determined. This forms in real-time a dewarped image from the fish-eye image with its distortion removed.

The invention discloses a camera lens. From the object side to the image side, the camera lens sequentially comprises a first lens with positive refraction power a convex object side surface, a second lens, a third lens, a fourth lens, a fourth lens with a concave object side surface, a fifth lens with positive refraction power, a sixth lens, and a seventh lens with negative refraction power; the camera lens also comprises a diaphragm arranged between an object to be shot and a second lens. The camera lens meets relation expressions of TTL/Img H<2.4 and 1.5<CTl/CT2<4, wherein TTL is the total length of the camera lens, Img H is a half of the diameter of the effective pixel area of the camera lens on an imaging surface, CT1 is the central thickness of the first lens, and CT2 is the central thickness of the second lens. Meeting the expressions above, the camera lens has the advantages of wide field angle (wide angle), miniaturization, high imaging quality and the like.

A light emitting diode system includes a housing including a light emission opening and a light emitting diode disposed within the housing. A first film layer covers the light emission opening and includes a uniaxial collimating film configured to direct light from the light emitting diode along a first axis.

The invention discloses a super wide-angle lens, which, from an object side to an image side, successively comprises a first lens having negative refractive power, a second lens having negative refractive power, a third lens having positive refractive power, a fourth lens having positive refractive power, fifth lens having negative refractive power and a sixth lens having positive refractive power, wherein the object side of the second lens is a convex surface and the image side of the second lens is a concave surface, the object side of the third lens is a convex surface, and the image side of the sixth lens which is close to the axis is a concave surface. The super wide-angle lens satisfies the following relation: the absolute value of tan (HFOV)/TTL>0.9; and -2.0& absolute value of t;f1/f<0, wherein the HFOV is half of the biggest vision field angle of the super wide-angle lens, TTL is the overall length of the super wide-angle lens, f1 is the effective focal length of the first lens, and the f is the effective focal length of the super wide-angle lens. The super wide-angle lens can improve the vision field angle while guaranteeing the miniaturization, realizes the characteristics of the wide angle, corrects various image differences and improves the image quality.

The invention provides a robot automatic charging method and system and relates to the technical field of robots. The method comprises steps that a planar map of a robot movement area is established, and positions of charging piles are labeled on the planar map; the current position of a robot on the planar map is obtained, a path is planned according to the current position of the robot and the positions of the charging piles on the planar map, and the robot is enabled to move toward a charging pile according to the planned path; when the charging pile appears in a field angle of a top camera of the robot, the robot detects a vision positioning identifier on the charging pile via the camera, and orientation information of the robot relative to the charging pile is calculated according to the detected vision positioning identifier; the robot automatically adjusts the position and angle according to the orientation information until a charging slot in the bottom of the robot is fully matched with a contact point of the charging pile. The invention enables the robot to rapidly and accurately position the position of the charging pile, and improves the robot automatic charging efficiency.

It is sought to provide an indicator lamp, which is excellent not only in short distance visual recognition property but also in long distance one, as well as being further excellent in sight field angle property.

An indicator lamp comprising a light-emitting element 1 and a light-emitting element lens 2 having a light-emitting element mounting cavity 3 form at the bottom is disposed, in which the light-emitting element disposed in the cavity 3 emits light to be fully reflected by the peripheral surface of the lens 1 and proceeds as emission light flux forwardly of the lens 1. The slope angle of the peripheral surface with respect to the lens axis is reduced progressively from the bottom toward the lens front surface 5 in three stages, thus forming circumferential corners 7 and 8 as boundaries between adjacent ones of the three stages. The circumferential corners scatter light emitted from the light emitting element 2 to provide concentric emission light fluxes as viewed from the side of the lens front.

The invention provides a laser radar and a working method thereof. The laser radar comprises a transmitting device, a beam splitting device, a galvanometer and a receiving device, wherein the transmitting device is used for transmitting a first laser beam to a to-be-detected object; the beam splitting device is used for splitting the first laser beam into a plurality of second laser beams, and thepropagation directions of the multiple second laser beams are different; the galvanometer comprises a first reflecting surface, the first reflecting surface is used for reflecting the second laser beams, the galvanometer is provided with a first rotary shaft and is rotated around the first rotary shaft, and an included angle between the first rotary shaft and a normal line of the first reflectingsurface is greater than zero; the receiving device is used for receiving echo beams reflected by the to-be-detected object. The laser radar has the advantage that the larger field angle can be obtained through smaller rotation angle of the galvanometer.