33results about How to "Narrow field of view" patented technology

A positioning system in an optical card reading apparatus, for accurately positioning the optical card (801) relative to the probe array (102) used to read the data stored on the card. The card (801) is provided with a pattern of servo bands (800) and the sensor (103) used to read out data stored on the optical card (801) has a windowing function which is used to narrow its field of view (802) to define a region of interest (900) corresponding to one or the servo bands (800), and the output is fed to an analogue-to-digital converter. Thus, the “windowing” function of the sensor (103) is used to increase the readout speed and, therefore, the speed of detection of servo marks (800) to enable more rapid positioning of the probe array (102) relative to the optical card (801).

Methods and apparatus for combining or separating spectral components by means of a polychromat. A polychromat is employed to combine a plurality of beams, each derived from a separate source, into a single output beam, thereby providing for definition of one or more of the intensity, color, color uniformity, divergence angle, degree of collimation, polarization, focus, or beam waist of the output beam. The combination of sources and polychromat may serve as an enhanced-privacy display and to multiplex signals of multiple spectral components. In other embodiments of the invention, a polychromat serves to disperse spectral components for spectroscopic or de-multiplexing applications.

The present invention discloses a full parallax three-dimensional display device. It comprises a projector array and an orthogonal cylinder raster screen. The orthogonal cylinder raster screen comprises the first cylinder raster and the second cylinder raster. The projector array and the orthogonal cylinder raster screen are put in order. The projector array projects images on the orthogonal cylinder raster screen. The raster directions of the first cylinder raster and the second cylinder raster of the orthogonal cylinder raster screen are parallel to the x-axis and the y-axis, respectively. The advantage of the present invention is that it can generate 3D images of high image resolution and high view-field resolution. The extremely tiny view field intervals can bring completely continuous and jumping-free 3D perception for the viewer, reduce the fatigue caused by discontinuous view field in conventional 3D display, and achieve full parallax 3D display including horizontal parallax and vertical parallax.

An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially disposed on an optical axis from an object side toward an image side. A distance from an object-side surface of the first lens to an imaging plane of an image sensor is TTL, an overall focal length of an optical system including the first to sixth lenses is F, and TTL/F≤0.83. An optical axis distance between the second lens and the third lens is D23, an optical axis distance between the third lens and the fourth lens is D34, and 2.2<D23/D34<5.4.

An apochromatic imaging system has an object-side lens group having at least an object-side lens element with positive refractive power and formed from a flint glass material with deviation of relative dispersion −0.013<ΔP_g,F<+0.013 and an Abbe number less than 50. A middle lens group has at least a second lens element and a third lens element, wherein, one of the second and third lens elements has deviation of relative dispersion −0.013<ΔP_g,F<0.013 and the other of the second and third lens elements has deviation of relative dispersion 0.013<ΔP_g,F<0.04. An image-side lens group has at least a fourth lens element.

An in-vehicle alert apparatus includes an object information acquiring unit, a vehicle status information acquiring unit, a display unit, and an electronic control unit. The electronic control unit determines whether or not an alert target exists outside a field of view of a driver, and displays, as an alert screen, a single display screen when one alert target is selected, a whole display screen when two alert targets are selected and all of the two alert targets are determined to exist within the field of view of the driver, and an individual display screen when two alert targets are selected and an alert target having the highest alert degree is determined to exist outside the field of view of the driver.

A system and a method are disclosed for calibrating an image acquisition system of a farming machine. The farming machine captures images of objects in an environment as the farming machine moves through an environment. Based on the captured images, a represented three-dimensional (3D) model of the environment representing the objects in a three-dimensional space is generated. From the represented 3D model, a represented location of an object (e.g., building, lamppost, tree) is determined. The represented location of the object is compared to a reference location of the object and the comparison is used to calibrate the image acquisition system by modifying positions, orientations, or optical settings of one or more cameras in the image acquisition system.

An imaging tool which has an objective lens, a beam splitting mirror and a turning mirror. The turning mirror has a centrally integrated aperture. The turning mirror is located at a secondary focal plane in the illumination path, and thus there is no illumination at any point on the object pane which is stigmatic with the integrated aperture. The integrated aperture provides a means to inject or remove light from a small spatial portion of the object plane. An airspace waveguide is integrated into the metal substrate of the turning mirror and eases the transfer of light from an external optical port to and from the aperture, and then onto the object plane.

An apparatus and system for a display screen for use in near-eye display devices. Small light emitting devices are placed behind a plurality of light-directing beads. The light emitting devices and light-directing beads for a display device and system placed in front of a user for near-eye display. This allows a user to experience near-eye display with greater resolution, wider field of view and faster frame rate. Other embodiments are described herein.

A test apparatus for measuring strength of a specimen includes: a lower container having an opening that opens upward; an upper container having an opening that opens downward and being sized to be insertable into the opening of the lower container; a support unit that is provided in the opening of the lower container and supports the specimen; a pressing unit including an indenter that presses the specimen, and a load measurement unit that measures a load applied to the indenter; and a movement mechanism that moves the indenter closer and away relative to the support unit, in which when the specimen supported by the support unit is pressed by the indenter moved by the movement mechanism, the upper container is positioned so as to cover the specimen.

The invention provides a registration system which is suitable for registration control of a plurality of color cells. Each color cell is provided with a registration module, and each registration module can independently determine an image acquisition opportunity in combination with deformation of a printing material, so that an accumulative error of a photographing opportunity is eliminated, and it is ensured that a correct target is acquired under the condition of a small field of view; each registration module is only used for detecting a registration deviation value of the corresponding color cell relative to a reference color cell, so that registration adjustment of each color cell is independent, the situation that subsequent color cell parameters are adjusted along with adjustment of parameters of one or more color cells is avoided, and the registration system is high in detection precision of the registration deviation value of each color cell, and high in response speed; and each registration module in the registration system is provided with an embedded processor, and a unified industrial personal computer is not arranged, so that the processing speed is increased, the communication delay is reduced, the registration precision of printed matters is high, and the registration system is suitable for various printing scenes such as flexographic printing, gravure printing and digital printing.

The invention discloses an automatic registration method and device, and the method employs a trigger target and a sensor as triggers, and an image collection device is started according to a trigger signal sent by the sensor, thereby precisely controlling the image collection time; and correspondingly, the visual field range of the image collector is reduced into a single target registration target, angle errors of the target registration target are eliminated, so that the collected target registration target image has higher resolution, and a registration offset value can be calculated and updated on each printing plate periphery in combination with physical quantities such as relative stretching amount of a printing material. Overprinting parameters are adjusted in real time according to an overprinting deviation value, so that the printing precision of printed matters can be improved.

The invention provides a stable and efficient single spore isolation method for plasmodiophora brassicae woronin serving as a protist with strong parasitism. The stable and efficient single spore isolation method comprises the following steps of: preparing a relatively pure spore suspension by using an improved sucrose gradient centrifugation method, calculating the concentration of the spore suspension by using a blood counting chamber, on the basis of the spore suspension with a certain concentration, obtaining single-dormancy spores by using an agar block planar capillary imprinting method,and then inoculating the single-dormancy spores to robust root hairs of the susceptible variety ECD-05 in an ECD system for accelerating germination for 2-3 days. Compared with previous related research methods, the method disclosed by the invention mainly overcomes the problems that: single spores are tiny and not easy to position under a microscope; the visual field of a liquid droplet method is layered too much; furthermore, the single spores are easy to dry and cannot be absorbed; the single spores cannot be accurately picked through micromanipulation and the like. The combination of theplanar capillary imprinting method can greatly reduce the visual field range needing to be inspected during microscopic examination; furthermore, the blocked agar is easy to grab; in addition, advanced automatic instruments and equipment are not needed; the operability is high; and the single spore isolation efficiency can be remarkably improved.