摘要:
A method for determining a localization parameter of an object includes generating a plurality of estimates of a first frequency-domain amplitude of a baseband signal from the object, each estimate corresponding one of a plurality of temporal segments of the baseband signal. The method also includes determining the first frequency-domain amplitude as most common value of the plurality of estimates, and determining the localization parameter therefrom. A localization system includes a memory and a microprocessor. The memory stores instructions and is configured to store a baseband signal having a temporal frequency component and a corresponding first frequency-domain amplitude. The microprocessor is adapted to execute the instructions to: (i) generate a plurality of estimates of the first frequency-domain amplitude each corresponding to a respective one of a plurality of temporal segments of the baseband signal, and (ii) determine the first frequency-domain amplitude as the most common value of the estimates.
摘要:
Apparatus for the determination of the position of an object comprises a radiation sensor (16) sensitive to spatial variations, in at least one direction, of intensity of radiation received from a region of observation (6). A mask (14) attenuates the radiation in a random spatially-variant manner whilst sampling (18) and calculating means (20) determine the autocorrelation function of the received pattern with previously stored values to sense the position of an object (8).
摘要:
The present invention discloses a system that measures the position of a light source in space using an imager and transparent surface with a pattern on top. The pattern consists of a repetitive pattern and a distinctive element. The system achieves sub-micron precision. It also handles the measurement of several light sources simultaneously, and the measurement of the position of a retroreflector instead of the light.
摘要:
A sun azimuth sensor comprises a housing and a photo detector (200a). A slit allowing sunlight to pass through is provided on the top of the housing. The photo detector includes a first and a second photoelectric detective elements (201,202) in the same shape. The two photoelectric detective elements are made of the same photosensitive base, and are able to respond to the sunlight from the slit respectively and produce an electric signal. There is a given relationship between the output electric signal and the azimuth angle of the solar panel, so that the adjustment precision of the solar panel is improved.
摘要:
The invention relates to spectral analysis and laser location. The inventive method is characterised in that recording of systems of interference uniform thickness fringes obtained by means of Fabry-Perot wedge interferometers is carried out in the form of spatial frequencies whose periods correspond to a light emission wavelength and angles of incidence thereof by projecting the images of said systems on periodical systems provided with photocells, wherein the thus obtained electric signals are subsequently analysed. Said method is carried out by means of an optical system consisting of three interferometers. The inventive method for determining the direction and wave length of a coherent light emission and the optical system for carrying out said method make it possible to simultaneously determine the direction of incidence of several laser beams having equal or different light wavelengths, to measure said beams in a wide spectral range in a high-accuracy manner and can be used for the spectral analysis of a light emission and for orienting different actuating mechanisms with the aid of laser beams.
摘要:
A sensor for determining a component of a location of a radiation source within a three dimensional volume includes a mask having a series of openings that has a predetermined mathematical relationship among the openings within the series of openings and defines a mask reference line; a detector surface spaced from the mask where radiation passing through the mask creates a mask image on the detector surface having a series of peaks and an image reference line within the mask image that can be located and where at least 50% of the mask image is projected onto the detection surface; and a calculating unit to determine a location of the image reference line within the mask image and the component of the location of the radiation source from the calculated location of the image reference line within the mask image. A method and system for using this sensor are also disclosed.
摘要:
A light tracking system includes at least one emitter and at least one receiver array. The receiver array receives a light signal from a source by at least one receiver module of the array. The difference between the intensity of the light signal arriving at receivers of the receiver array is used to determine the approximate angular deviation from the direction of the light source. The position of the receiver array is adjusted so as to reduce the difference between the intensity of light arriving at receiver modules of the receiver array. Signal encoding is used to synchronize the receiver array to the emitter so as to allow for the transmission of binary commands from the emitter to the receiver array by way of the light signal produced by the emitter.
摘要:
Contrast imaging apparatus and methods with wavefront coding aspheric optics and post processing increase depth of field and reduce misfocus effects in imaging phase objects. The general interference contrast imaging system (300) is modified with a special purpose wavefront coding optical element (324) and image processing (326) of the detected image (320) to form the final image. The wavefront coding optical element can be fabricated as a separate component, or can be constructed as an integral component of the imaging objective, tube lens, beam splitter, polarizer or any combination of such.
摘要:
Die Vorrichtung zur Ermittlung des Einfallwinkels einer Strahlung, insbesondere von Licht und vorzugsweise von Sonnenstrahlung, innerhalb eines detektierbaren Strahlungseinfallwinkelbereichs auf eine Strahlungseinfallfläche, ist mit einem Gehäuse (110) versehen, das eine Oberseite (112) mit einer Strahlungseinfallöffnung (114) aufweist, welche von einem Öffnungsrand im Gehäuse (110) begrenzt ist. Ferner weist die Vorrichtung ein in dem Gehäuse (110) angeordnetes strahlungssensitives Bauteil (116) auf, das eine Strahlungseinfallfläche (118) aufweist, die aufgrund der Strahlungseinfallöffnung (114) des Gehäuses (110) zumindest teilweise freiliegt, wobei die Strahlungseinfallfläche (118) bezogen auf die Oberseite (112) des Gehäuses (110) zu dessen Inneren hin um einen Versatz versetzt angeordnet und wobei der Öffnungsrand im Gehäuse (110), der mindestens ein Paar von gegenüberliegenden, Randinnenflächen definierende Randabschnitte (122) aufweist, von der Strahlungseinfallfläche (118) bis zu einer durch den Versatz definierenden Höhe aufragt. Das strahlungssensitive Bauteil (116) weist eine Vielzahl von zwischen dem Paar von Randabschnitten (122) aufeinanderfolgend angeordneten Sensorelementen (120, 130, 132) auf, mittels derer jeweils verschiedene Strahlungseinfallwinkel oder Strahlungseinfallwinkelbereiche innerhalb des detektierbaren Strahlungseinfallwinkelbereichs detektierbar sind. Diejenigen Sensorelemente (130,132), die für Strahlung repräsentativ sind, welche in einer sowohl orthogonal zur Strahlungseinfallfläche (118) verlaufenden als auch in einer die beiden gegenüberliegenden Randabschnitte (122) schneidende Strahlungseinfallebene unter dem jeweils flachsten noch detektierbaren Einfallwinkel einfällt, sind benachbart zu demjenigen Randabschnitt (122) angeordnet, dessen Randinnenfläche der einfallenden Strahlung zugewandt ist.