摘要:
Die Erfindung betrifft ein Verfahren zum Untersuchen einer Probe sowie eine Vorrichtung zum Ausführen eines solchen Verfahrens. Die Erfindung betrifft außerdem eine Vorrichtung, die zum Untersuchen einer Probe ausgebildet ist und die wenigstens eine Lichtquelle zum Erzeugen eines Beleuchtungslichtbündels (1), das wenigstens eine zur Fluoreszenzanregung der Probe geeignete Wellenlänge aufweist, und zum Erzeugen eines Abregungs- oder Schaltlichtbündels (6), das wenigstens eine zur Abregung der Probe geeignete Wellenlänge aufweist, beinhaltet und die wenigstens ein Objektiv zum Fokussieren des Beleuchtungslichtbündels (1) und des Abregungs- oder Schaltlichtbündels (6) beinhaltet. Die Vorrichtung zeichnet sich dadurch aus, dass das Beleuchtungslichtbündel (1) und das Abregungs- oder Schaltlichtbündel (6) derart geführt sind, dass eine zu untersuchende Probe in einer Probenebene entlang einer Probenlinie mit dem sich entlang der Probenlinie ausbreitenden Beleuchtungslichtbündel (1) beleuchtet ist und das Abregungs- oder Schaltlichtbündel (6) in der Probenebene wenigstens teilweise räumlich mit dem Beleuchtungslichtbündel (1) überlappt, und dass eine Detektionsoptik vorhanden ist, die ein Detektionsobjektiv beinhaltet und die von dem mittels des Beleuchtungslichtbündels (1) entlang der Probenlinie beleuchteten Probenbereich ausgehendes Detektionslicht in eine Detektionsebene abbildet, in der ein Detektor angeordnet ist, der den Teil des von der Probenebene ausgehenden Fluoreszenzlichts als Detektionslicht detektiert, der aus einem ersten Unterbereich (19) des Überlappungsbereichs stammt, in dem die Wahrscheinlichkeit einer Wechselwirkung der Probenmoleküle mit dem Abregungs- oder Schaltlichtbündel (6) größer als 90%, insbesondere größer 95%, ganz insbesondere größer 99%, ist, und/oder aus einem zweiten Unterbereich (20) stammt, der von dem ersten Unterbereich (19) wenigstens abschnittweise umgeben ist und/oder in dem das Abregungs- oder Schaltlichtbündel (6) eine Nullstelle aufweist, während der Detektor gleichzeitig das von außerhalb des ersten und zweiten Unterbereichs (19, 20) stammende Fluoreszenzlicht wenigstens teilweise ausgeblendet und nicht detektiert.
摘要:
The present technique presents a method for determining a characteristic of a biological corpuscular entity in a biological sample obtained from a subject. In the method, the biological sample including the biological corpuscular entity in its native morphological form is provided. To the biological sample, a reagent mixture is mixed including at least a fixative in the reagent mixture. The fixative maintains the native morphological form of the biological corpuscular entity. Subsequently, the biological sample is inspected with an interferometric microscopy device to obtain an interference pattern representing the biological corpuscular entity in the native morphological form. Finally in the method, the interference pattern is analyzed to determine the characteristic of the biological corpuscular entity in the native morphological form. Thus a volumetric and/or morphological study of the biological corpuscular entity is performed in the native morphological form.
摘要:
Systems and methods for improved interferometric imaging are presented. One embodiment is a partial field frequency-domain interferometric imaging system in which a light beam is scanned in two directions across a sample and the light scattered from the object is collected using a spatially resolved detector. The light beam could illuminate a spot, a line or a two-dimensional area on the sample. Additional embodiments with applicability to partial field as well as other types of interferometric systems are also presented.
摘要:
Appareil de tomographie optique comprenant : une source de lumière polychromatique (SLM), un capteur optique monodimensionnel (CIM), un microscope interférométrique (Ml), un système de filtrage spatial confocal monodimensionnel (FS, un système d'actionnement (PR, TR1, TR2, TR3) permettant de réaliser un balayage unidirectionnel en profondeur d'un objet à observer et un processeur (PR) pour reconstituer une image bidimensionnelle d'une section dudit objet à partir d'une pluralité d'images interférentielles monodimensionnelles acquises par ledit capteur d'image au cours dudit balayage unidirectionnel. Procédé de tomographie optique par utilisation d'un tel appareil.
摘要:
Certain aspects pertain to aperture-scanning Fourier ptychographic imaging devices comprising an aperture scanner that can generate an aperture at different locations at an intermediate plane of an optical arrangement, and a detector that can acquire lower resolution intensity images for different aperture locations, and wherein a higher resolution complex image may be constructed by iteratively updating regions in Fourier space with the acquired lower resolution images.
摘要:
At least first and second digital images of the sample are acquired having different focal heights relative to a platform on which the cells are disposed. A contrast matrix is produced having elements computed in dependence upon the difference between the values of the corresponding pixels in the first and second images. A phase matrix is produced by convolution of the contrast matrix with a predetermined distance matrix. The phase matrix is used to assess characteristics of the sample, such as the presence of cells in the sample or the heights of cells in the sample.
摘要:
Methods for correcting for aberrations in the image or three-dimensional reconstruction of a sampled region obtained by broadband interferometry. The sampled region is illuminated with a broadband beam of light, and light returned from the sample is detected, along with a reference beam, in order to derive an interference signal for pixels of a volume spanned by wavenumber and axes transverse to the beam propagation direction. An optimization procedure is performed with respect to a specified criterion so as to obtain an aberration-corrected image of at least one plane of the sampled region, either in a plane-specific manner or in a space-invariant manner throughout the sampled region. A filter function, which may be derived from the interference signal attendant to irradiating a sparsely distributed plurality of point scatterers, or otherwise, corrects for a detected aberrated point spread function. Methods of the present invention may be used for aberration correction in reading information from an optical data storage medium.
摘要:
The invention relates to a microscope and method for detecting sample light, having at least one illuminating beam which is partially phase-modulated with a modulation frequency along the cross-section thereof and a microscope objective for intensity-modulated focusing of the illuminating beam into a sample and also having a detection beam path having at least one demodulator. Advantageously at least one electro-optic modulator (EOM) is used for phase modulation of at least a part, preferably half of the illuminating beam, or different portions or halves of the illuminating beam are modulated differently, preferably anti-phase, by anti-phase control of piezoelectric elements, or acousto-optic modulators are provided for subdivision into a plurality of partial beam paths and optic elements are provided for partial phase modulation of the excitation beam. Also actuating elements are advantageously provided for setting the phase difference or at least one optic modulator, preferably an acousto-optic modulator (AOM), is used for demodulation in the detection or a change to the mode of operation of the detectors for demodulation takes place or in the case of foci distribution, produced for example by a rotating micro-lens disc or multisport generation the individual foci are subjected to an intensity modulation, either by arranging a half-space phase mask in a pupil plane of the objective or by individually manipulating each partial beam by means of the partial phase modulation of said partial beam with a modulation frequency along the cross-section thereof or by manipulating a beam by means of the partial phase modulation of said beam with a modulation frequency along the cross-section thereof and subsequent subdivision of said beam.
摘要:
A detector of light transmitted through a turbid medium, comprising: one or more Digital Optical Phase Conjugation (DOPC) devices, wherein the DOPC devices include (1) a sensor for detecting input light that has been transmitted through the turbid medium and inputted on the sensor; and (2) a spatial light modulator (SLM) for outputting, in response to the input light detected by the sensor, output light that is an optical phase conjugate of the input light.