397 results about "Radiation angle" patented technology

The invention concerns a method and a device for inspecting pipelines, in particular for detecting defects in pipelines by means of ultrasound. Towards this end, measuring sensors transmit ultrasound signals during passage through a pipeline. The signals reflected on boundary regions of a pipeline wall, e.g. surfaces or defects, are then measured and evaluated. The invention is characterized in that partial regions of the measuring sensors (virtual sensors) formed of a plurality of neighboring sensor elements irradiate ultrasound signals into the pipe wall at at least one radiation angle which is inclined with respect to the normal to the pipe wall and the signals reflected at boundary regions of the pipe wall are received by same and/or other partial regions of the respective measuring sensors, wherein defects in the pipe wall are determined by evaluation of the acoustical signals reflected by different boundary regions.

A low-profile antenna has increased broad-banding capacities as well as a lower radiation angle for enhanced cellular or mobile telephone wireless transmissions. Enhancing a basic PIFA antenna, a top metal radiator is notched so as to provide additional corners and greater perimeter length thereby enhancing the bandwidth capabilities of the antenna. Both ground and tuning tabs serve to enhance operational characteristics and a dielectric cover incorporating prismatic qualities serves to lower the radiation angle of transmission from approximately forty degrees (40 DEG ) to twenty degrees (20 DEG ). The prisms provide an operating radiation angle in the range of approximately seventy degrees (70 DEG ) to twenty degrees (20 DEG ). In one embodiment, a sheet of plastic foam slightly thicker than the depth of an associated connector is secured to the underside of the bottom plate to act as a friction seal when the antenna is screwed onto a mating connector, allowing for slight variations in the curvature of the mounting surface. By making the bottom conductive plate only slightly larger than the top radiator, the antenna's resonant frequency becomes independent of ground plane mounting and may not require such a ground plane. Under such circumstances, some adjustment of the tuning parameters may be required in order to provide optimum response.

The present Invention relates to a camera system suitable for use in minimally invasive surgery (MIS), among other applications. In at least one embodiment, the camera system includes an autonomous miniature camera, a light source assembly providing features such as steerable illumination and a variable radiation angle, and a control and processing unit for processing images acquired by the camera Io generate improved images having reduced blurring using a deblurring algorithm.

A tubular LED illuminating device comprises a tubular shell, a supporting frame and a plurality of light emitting units. An inner surface of the shell forms a plurality of elongate protrusions extending along a direction parallel to an axial direction of the shell. Each of the protrusions defines at least one elongate recess extending along the axial direction of the shell. The supporting frame is received in the shell and comprises at least three supporting plates. Two opposite edges of each supporting plate are respectively embedded in the adjacent recesses of different protrusions. The light emitting units are arranged on the at least three supporting plates, and light emitted from the light emitting units emits out through the shell and has a radiation angle of 360 degrees.

A light source device has a transparent/scattering state switching element for switching the range of irradiation angles, and liquid crystal molecules and dichroic dye molecules are dispersed in a polymer matrix in the PDLC layer of the transparent/scattering state switching element. The range of irradiation angles can thereby be switched, and the color can be prevented from changing when the radiation angle is switched.

Disclosed is a laser radar apparatus. The laser radar apparatus includes: a light transmission unit configured to output a laser pulse by using a light source; a light reception unit configured to receive a reflected laser pulse in connection with the laser pulse; and a controller configured to adjust a repetition rate of the laser pulse of the light source, in which the controller adjusts the repetition rate of the laser pulse based on at least one of reception power, a target distance, a movement speed, a vertical angle, and a radiation angle.

A light source module, a backlight unit, a display apparatus, a television set, and an illumination apparatus are provided. The light source module includes: one or more light source units including a light emitting element emitting light when electricity is applied thereto; and an optical sheet disposed above the light source units and exhibiting bidirectional transmittance distribution function characteristics having first and second peaks at radiation angles less than 0° and greater than 0°.

A luminescent diode (LED) that improves brightness uniformity, a fabrication method thereof, and a backlight assembly having the same are disclosed. The LED includes an LED chip that emits light in a side surface of an LCD device; and an optical guide element on the LED chip that enlarges a radiation angle of the light. The LED may alternatively include an LED chip that emits light on a bottom surface of the LCD device; and an optical guide element on the LED chip that enlarges a radiation angle of the light. The radiation angle of light maximally enlarged to prevent hot spots caused by brightness nonuniformity. An enhanced image quality results.

A liquid crystal display with low manufacturing cost, small dark area and compact exterior is provided by utilizing a plurality of differently radiating light emitting diodes at different angles. The liquid crystal of present invention includes a thin film transistor panel for displaying image, a backlight assembly for providing light to the thin film transistor panel with a plurality of light emitting diodes with different light radiation angles and a light guiding plate, and a frame unit for encompassing the thin film transistor panel and the backlight assembly. The light emitting diodes are placed either at the mid-point of light incident surface or the corner portion of the light guiding plate.

An LED comprises a substrate, an LED chip mounted on the substrate, an encapsulation encapsulating the LED chip, and a phosphor layer containing phosphor particles disposed on an outer surface of the encapsulation. A luminous intensity I of light generated by the LED chip and a radiation angle θ are in Lambertian distribution and satisfy following formula: I=I₀×cos θ, here the radiation angle θ is not lower than 0°, and is not higher than 90°, and I₀ is a luminous intensity at a central axis of the LED chip, and the radiation angle θ is an angle between the light and the central axis. One of parameters of concentration, particle number of the phosphor particles in the phosphor layer and a thickness of the phosphor layer is also in Lambertian distribution relative to the radiation angle θ.

In one embodiment, a light emitting panel includes a base panel and a plurality of light emitting elements mounted to the base panel. Each of the light emitting elements produces an illumination pattern having a region of substantially uniform intensity that extends over a radiation angle of at least about 60°. One or more light conditioners are positioned adjacent the base panel to receive and condition light produced by the light emitting elements.

The invention discloses a setting method of a speaker group with a flexibly adjustable radiation angle. Considering the wide-directivity need, a digital signal processor is provided with a group of preset filters to control the relative amplitude and phase of each sound source channel signal output; considering the narrow-directivity need, the digital signal processor is provided with another group of preset filters to control the delay time and relative amplitude of each sound source channel signal output; and to switch between the wide-directivity need and narrow-directivity need, the real-time switch is flexibly realized through an instruction in the digital signal processor. Particularly, when ten sound sources are horizontally placed, different front-end digital filter groups are set according to different needs; when 'stereo wide directivity' is required, five right-channel sound sources are fed into the digital signal processor, processed by the filters 1-5 and fed to 5 independent power amplifiers and sound sources, thus forming right-channel wide-directivity radiation; and five left-channel sound sources form left-channel wide-directivity radiation. Through the invention, narrow-directivity replay also can be realized.

A location estimation system for estimating a location of a wireless communication terminal, the location estimation system including first to M-th wireless communication devices and a control device, wherein i-th wireless communication device includes communication circuitry, which in operation, receives a signal transmitted from the wireless communication terminal using beams in Ni directions, and control circuitry, which in operation, calculates Ni reception qualities corresponding to the beams in the Ni directions, respectively, and wherein the control device includes control circuitry, which in operation, estimates i-th arrival direction of the signal received by the i-th wireless communication device by comparing the Ni reception qualities with the radiation angle characteristics of the beams in the Ni directions, and estimates the location of the wireless communication terminal based on the first to the M-th arrival directions estimated and locations of the first to the M-th wireless communication devices.

The invention relates to a leaking coaxial cable with a grooved outer conductor. The leaking coaxial cable comprises an inner conductor and an insulating layer, an outer conductor, a packing layer and an outer sheath which are wrapped on the inner conductor in turn from inside to outside. The leaking coaxial cable is characterized in that: the outer conductor is uniformly provided with a plurality of triplex splayed groove slit groups, the triplex splayed groove slit groups consist of two columns of groove slits which are mutually symmetrically and obliquely distributed; and the groove slits form a combined structure according to different proportional sizes, different arrangement intervals and different radiation angles of the adjacent groove slits. The coaxial cable has wider communication band and more excellent voltage standing wave ratio and coupling loss value at 900MHz frequency band, has low system loss in a prescribed frequency band, excellent polarization property and about +/-5dB fluctuation of radiation intensity, improves the wireless communication quality, and realizes long-distance wireless blind area coverage. The outer conductor adopts a self-adhesive copper strip so that the consistency of longitudinally-wrapped overlapped lines of the copper strip along the length direction of the cable is ensured, the coupling loss fluctuation of the cable is lower and the polarization property is excellent.

In a display apparatus including an organic EL element utilizing the optical interference effect, and a lens, a diameter of the lens is set such that, of light radiated from the organic EL element into a protective layer, light radiated at a larger angle than an angle, at which a light intensity distribution of the light radiated into the protective layer with respect to a radiation angle of the light takes a local minimum value, is not output to the outside of the display apparatus.