136 results about "Horizontal field" patented technology

A panoramic annular lens system (PAL), a unitary video camera and a PC-based software system that unwraps a 360° video image into a seamless, distortion free horizontal image image in real time. The PAL system of the preferred embodiment has a 360° horizontal field of view and a 90° vertical field of view in a 40 mm diameter compact package. The invention is not limited to any particular type of lens system. In fact, there are numerous lens systems for providing a 360° panoramic view. The video camera may be a CCD or CMOS based device having a pixel resolution of either 1280×1024 (high resolution) or 720×480 (NTSC). The unwrapping system is a radiometric ray tracing program carried out using a computer's graphics card capabilities to produce highly efficient regional transformation while minimizing software overhead. The result is real time, high resolution 30 fps conversion from a spherical distorted image to a flat panoramic image in Cartesian coordinates.

The invention provides integrated HEMT and a combination, a method as well as a system of a horizontal field effect rectifier. The invention discloses an integrated highly efficient field effect rectifier and a device of HEMT based on GaN or other similar semi-conductor material, a method for manufacturing the integrated device and a system comprising the integrated device. The horizontal field effect rectifier is provided with an anode which comprises short-circuit ohmic contact and Schottky contact, a cathode which comprises an ohmic contact; while HEMT preference is provided with a grid comprising Schottky contact. Two zones provided with fluorine ion are respectively formed right beneath the Schottky contact of the rectifier and HEMT, in order to pinch off a (electron gas) groove of hetero-junction interface between epilayers of two structures.

A human-portable utility locator system for locating and tracing a buried utility line characterized by an electromagnetic field emission. The locator may include a horizontal spaced sensor pair for detecting the horizontal field asymmetry of the emitted field in one or more independent frequency bands, which is employed to assist in determining an accurate “virtual depth” measurement for producing detection events. An event detector may be disposed to detect events corresponding to extremum in the B-field gradient with respect to time and a user interface (UI) coupled to the event detector signals the detected event to a user. In a preferred embodiment, one pair of spaced-apart 3D magnetic sensor arrays is disposed substantially orthogonal to another intermediate spaced-apart pair of sensors.

A wide field of view night vision system is described. The system comprises a head attachment apparatus configured to attach to a user's head and a night vision subsystem. The night vision subsystem comprises one or more night vision image sensors attached to the head attachment apparatus. Each sensor receives input light and produces a digital image of the input light. A processor processes the digital image(s) to produce a wide-field image. The wide-field image spans at least 60 degrees of a user's horizontal field of view. A display and eyepiece attached to the head attachment apparatus receives and displays the wide-field image. The eyepiece is positionable between the display and the user's eye to image the wide-field image into the user's eye.

The invention discloses a plant root system monitoring system based on a hyperboloidal mirror, which comprises a micro root canal, a hyperboloidal mirror and a digital camera unit, wherein the micro root canal is arranged in a field where a monitored plant grows, the hyperboloidal mirror is arranged inside the micro root canal, and the digital camera unit is arranged inside the micro root canal and positioned above the hyperboloidal mirror and connected with an image acquisition card. In the invention, a CCD (Charge Coupled Device) camera can obtain a 360-degree horizontal field integral image around the reflector through each acquisition, the camera is only controlled to move up and down along the canal wall of the micro root canal without rotating; and in the post-stage image processing, the image can be vertically spliced only. Therefore, according to the technical scheme, the root system image is acquired by adopting the plant root system monitoring system, the complexity of mechanical design and post-stage image processing is reduced, and the image acquiring efficiency is improved.

A pixel structure for a horizontal field LCD comprises a plurality of pixel units. Each of the pixel units comprises a gate line corresponding to the pixel unit, a data line corresponding to the pixel unit, and at least one TFT, wherein the TFT is electrically connected with the gate line and the data line, the gate line and the data line divide the pixel unit into four sub-pixels, the sub-pixel is provided with a pixel electrode which is electrically connected with the TFT, and the pixel electrode is provided with a plurality of slits in a predetermined direction.

The invention discloses an onboard 3D imaging solid state laser radar system, and relates to the field of onboard laser radars. The system herein can address the technical problems of slow scanning, large size, low receiving signal to noise ratio and low safety factor of conventional mechanical scanning laser radars. The system herein includes a laser device, a plurality of TR assembles and a central processing unit. The laser device includes an optoisolator, a pre-amplifier, a beam splitter, a main amplifier array, and a beam expanding collimated light path. Each TR assembly includes a transmitting system and an echo receiving system. The transmitting system includes a unidirectional glass array and a liquid crystal polarized grating array. The echo receiving system includes an optical filter array, a gathering lens array photoelectric detector array and a plurality of playback circuits. According to the invention, a radar has no mechanical rotary parts, which can greatly reduce the size of a laser radar system; a single TR assembly has no processor, and all the TR assemblies are under uniform control of a central processing unit of the laser radar system, which facilitates integration; and the arrangement of the plurality of TR assemblies can cover a 360 degree horizontal field of view and a 20 degree vertical field of view.

The invention relates to a liquid crystal panel and a manufacturing method thereof. The liquid crystal panel comprises two display substrates capable of being perfectly bonded together, wherein raster scanning lines and data lines are formed on the first display substrate, and enclose to form a pixel unit; a thin film transistor (TFT) is arranged in the pixel unit; a pixel electrode and a common electrode are respectively formed in each pixel area of the second lining substrate; a first pad object containing a conducting material is formed between the first display substrate and the second display substrate, and connects the pixel electrode on the second display substrate and a drain electrode exposed through a first hole; and a common electrode line is formed on the first lining substrate or the second lining substrate, and is electrically connected with the common electrodes. A technical means of separately arranging the pixel electrodes and the common electrodes forming a horizontal field and the data lines on the two display substrates is adopted, and the parasitic capacitance between the pixel electrodes and the data lines cannot be improved when adjacent pixel electrodes are close to each other.

An image display system for surrounding a horizontal field of view of a viewer with images. The image display system comprises a portion of a sphere having a concavity defining an inner surface. A projection device is adapted to project images from a center of a radius of curvature of the portion of a sphere so as to project images on the inner surface of the portion of a sphere. The image display system is adapted to partially receive viewers in the concavity such that at least a horizontal field of view of the viewers is surrounded by an image projected from the center on the inner surface of the portion of a sphere.

A vision system for a vehicle includes a light source generating an illumination beam, a receiver having a pixel array for capturing an image in response to at least a reflected portion of the illumination beam, the image corresponding to a first horizontal field of view (FOV) angle, and a controller coupled to the light source and the receiver. The controller receives a vehicle speed input and, in response, selects a portion of the image as a non-linear function of the vehicle speed to generate a second horizontal FOV angle for displaying to the vehicle operator. The displayed angular FOV decreases, non-linearly, as the vehicle speed increases.

In a read-write head, the shields can serve as magnetic flux conductors for external fields, so that they direct a certain amount of flux into the recording medium. This problem has been overcome by the addition to the shields of a pair of tabs located at the edges closest to the ABS. These tabs serve to prevent flux concentrating at the edges so that horizontal fields at these edges are significantly reduced. Said tabs need to have aspect ratios of at least 2 and may be either triangular or rectangular in shape. Alternatively, the tabs may be omitted and, instead, outer portions of the shield's lower edge may be shaped so as to slope upwards away from the ABS.

In a first preferred embodiment, this invention provides a low cost means for reliably producing an auto-stereoscopic 3D front project display screen. The screen is engineered to distribute discrete portions of light across a range of discrete horizontal on and off axis viewing angles corresponding with perspective correct 3D images. The screen also distributes each of these pixels concurrently through a wide vertical range to enable users in vertical on axis and off axis viewing positions to see the pixels within their narrow horizontal field of vie yet through a wide vertical field of view. In a second embodiment, a 3D filter is provided that enables a display to automatically switch between displaying 3D media of a first 3D resolution and to display 3D media of a second 3D resolution. Both embodiments also enable multiple users to concurrently watch different programs on the same display at the same time.

The invention relates to a low-frequency-stage magnetic sensor background noise measuring method which is applicable to measuring the background noise of a low-frequency-stage magnetic sensor in a wild environment or a big shielding room. The method comprises the following steps that: response characteristics of amplitude frequencies and phase frequencies of two magnetic sensors are respectively adjusted to be accordant; the two sensors are horizontally arranged in parallel with a distance of 2-2.5m; two ends of the sensors are in parallel and level; the sensors sense identical natural horizontal field signals which belong to relevant signals; natural field signals can be eliminated by using a differentiation method; however, the background noise of the two sensors refers to an irrelevant random signal; and signal energy after the differentiation is the sum of noise energy of the two sensors. An average power spectrum of the signals after the differentiation is calculated, the average power spectrum is divided by 2 and is subjected to extraction of a root, and the background noise of a single sensor is calculated according to the output sensitivity of the magnetic sensors. The background noise of the low frequency stage magnetic sensor in a response bandwidth is accurately measured, and compared with a theoretical analysis method, the actual noise level of the magnetic sensor is relatively accurately reflected.

Several unique hardware configurations and methods for freeform optical display systems are disclosed. A freeform display system includes primary freeform optical element(s) and secondary freeform optical element(s) in tiled arrangements to expand the horizontal field of view (FOV) or the vertical field of view. The system may include a variable focusing system that produces intermediate pupil and changes the focal distance of a single focal plane or switches among multiple focal planes for rendering objects in focus while resolving accommodation-convergence conflict. The system may map light samples to appropriate light rays in physical space and use a cluster of projectors to project the mapped light rays to produce the light field of the virtual display content. Methods for making tiled freeform optical display systems and methods for producing virtual content with variable focus freeform optics and rendering light fields are also disclosed.

The present invention relates to a design of a radiofrequency (RF) receive coil (also commonly referred to as an imaging coil) for magnetic resonance imaging (MRI) in a horizontal field MRI system of a patient's shoulder region.