摘要:
A system for simultaneously detecting audio-characteristics within a body over multiple body surface locations comprising a coherent light: source directing at least one coherent light beam toward the body surface locations, an imager acquiring a plurality of defocused images, each is of reflections of the coherent light beam torn the body surface locations. Each image includes at least one speckle pattern, each corresponding to a respective coherent Sight beam and further associated with a time-fag. A processor, coupled with the imager, determines in-image displacements over time of each of a plurality of regional speckle patterns according to said acquired images. Each one of the regional speckle patterns is at least a portion of a respective speckle pattern. Each regional speckle pattern is associated with a respective different body surface location. The processor determines the audio-characteristics according to the in-image displacements over time of the regional speckle patterns.
摘要:
The present invention relates to a milk deterioration detection system (1) and method (100) which detects deterioration or spoiling of milk non-invasively (without contact) via laser speckle contrast imaging. A milk sample (S) is held in a transparent container and deterioration of milk causes the roughness of a transparent surface of said container to change, said changes being monitored by laser speckle contrast imaging.
摘要:
There is described a method of imaging a fluorescent sample, the method comprising: exposing the sample to a optical speckle pattern so that the speckle pattern is imprinted on the sample; and imaging the sample, wherein the optical speckle pattern imprinted on the sample produces fluorescent speckles which can be used as fiduciary marks in imaging the sample. Also described is an apparatus for imaging a fluorescent sample using the above method.
摘要:
La présente invention concerne un procédé de caractérisation de la dynamique interne d'un échantillon (2) de matière comprenant un milieu et des éléments en suspension dans ledit milieu, comprenant des étapes (i) d'obtention d'au moins deux images / et J de l'échantillon (2), (ii) de calcul d'une matrice de covariance croisée entre les images / et J, (iii) de détermination en utilisant ladite matrice de covariance croisée de déplacements rigides des éléments en suspension, (iv) de détermination de la dynamique microscopique interne de l'échantillon sur la base d'un coefficient de corrélation corrigé de l'effet des déplacements rigides. L'invention concerne aussi un produit programme d'ordinateur agencé pour exécuter les étapes du procédé selon l'invention, ainsi qu'un dispositif d'acquisition et de traitement d'images selon ledit procédé.
摘要:
System and method for detecting and counting bacteria suspended in a biological fluid by means of light scattering measurements is provided. In accordance with the method of the invention the level of signal to noise of the measured intensities of light scattered by a sample of the biological fluid is significantly enhanced for forwardly scattered light within a range of scattering angles which are smaller compared to a predefined maximal scattering angle. The system of the invention includes a cuvette adapted to contain a sample of the biological fluid whose sidewalls and windows are suitably constructed and arranged to significantly reduce the level of reflected light obscuring the scattering patterns measured within the range of scattering angles considered.
摘要:
Exemplary systems and methods for generating information associated with at least one portion of a sample can be provided. For example, it is possible to receive from the at least one portion and/or transmit to at least one electro-magnetic radiation to the portion. At least one first wave front of the electro-magnetic radiation received from and/or transmitted to the portion can be provided to generate at least one first transmitted wave front. After the first transmitted wave front is generated, at least one characteristic of at least one second wave front of the electro-magnetic radiation received from and/or transmitted to the portion can be modified to generate at least one second modified wave front which is different from the first transmitted wave front;. Further, the information can be generated based on the first transmitted wave front and the second modified wave front.
摘要:
Apparatus for imaging an area of a surface along a viewing angle that is oblique to the surface includes an afocal optical relay (192), which is adapted to form a tilted initial image of the area by collecting optical radiation from the area along an optical axis oriented at the viewing angle. A tilt correction unit (194) is coupled to correct a tilt of the initial image so as to form a substantially undistorted intermediate image. A magnification module (198) is coupled to focus the intermediate image onto an image detector.
摘要:
Apparatus for generating optical radiation includes a laser, which is configured to operate in multiple transverse modes simultaneously so as to generate an input beam, which is characterized by a first speckle contrast. The transverse modes of the input beam are optically mixed so as to generate an output beam have a second speckle contrast, which is substantially less than the first speckle contrast.
摘要:
A method and associated system improve accuracy in objective refraction measurements by including the measured distance between the photoreceptors of a subject's eye and the scattering location of light during the objective refraction measurements. Chromatic aberrations in the objective measurements are also compensated. The distance between the photoreceptors and the scattering location may be determined by adjusting a distance between a rotating speckled light pattern and an eye until the speckled light pattern appears to be stationary, or by employing a Scheiner disk.
摘要:
A system: for determining the authenticity of an abject including a reference-image acquisition module for acquiring a reference-image, The reference-image acquisition -module Includes a light-source, an imager including an imaging-sensor, and a database coupled with the imager for storing the reference-image. The light-source directs circumferential-light toward an authentication-region on the object The circumferential-light is at least one of collimated and telecentric. The circumferential-light impinges: on the authentication-region from a plurality of different azimuthal directions and at a predetermined oblique angle relative to the normal of a plane defined by said object A portion of the circumferential-light is reflected from the authentication-region toward a -specular reflection region and another portion is scattered from the authentication-region. The imager is focused on the. authentication-region and acquires a reference-image. The reference-image is a focused image of the scattered light. The reference-image includes image features related to surface features scattering phenomena of the authentication-region.