摘要:
A bead trapping device for trapping beads. The device is formed from a substrate, posts extending from the substrate; the posts being patterned to form cavities between the posts, the cavities having a diameter between 0.5 nullm and 200 nullm; and means for loading beads onto the substrate. A method of trapping microscopic beads for analysis, the method comprising the steps of contacting a fluid containing beads with a substrate having posts extending from the substrate to form bead trapping cavities, the bead trapping cavities having a diameter between 0.5 nullm and 200 nullm; and loading the beads into the bead trapping cavities.
摘要:
A method is described that includes measuring, at each of a set of W wavelength bins, a spectral response of at least one region of a sample stained with multiple stains, and determining the concentration of at least one of the stains in the region of the sample based in part on the spectral responses, the wavelength bins being chosen so that a matrix of elements that represent the responses of the stains at the wavelength bin has an inverse for which a mathematical stability is maximum relative to the inverses of other matrices of elements that represent the responses of the stains for other possible sets of wavelength bins.
摘要:
A method for the optical acquisition of characteristic quantities of an illuminated specimen, wherein a signal that is backscattered, reflected and/or fluoresced and/or transmitted from the specimen comprises the steps of detecting the signal by a spatially resolving detector in a plurality of channels in that the radiation coming from the specimen is imaged on the detector so as to be spectrally split and combining detection channels so that the quantity of measurements that are read out and further processed is less than the number of detection channels.
摘要:
The invention discloses a fluorescence microscope comprising a light source that emits excitation light for illumination of a specimen, means for defining a two-dimensional search region for the excitation and detection wavelengths, means for selecting a subregion from the search region, at least one detector that detects detected light proceeding from the specimen, and a display for displaying an image of at least a portion of the specimen. Furthermore the invention discloses a method for fluorescence microscopy.
摘要:
An aerosol lab-on-a-chip (ALOC) integrates one or more of a variety of particle collection, classification, concentration (enrichment), and characterization processes onto a single substrate or layered stack of such substrates. By mounting a UV laser diode laser light source on the substrate, or substrate stack, so that it is located down-stream of the sample inlet port and at right angle to the sample particle stream, the UV light source can illuminate individual particles in the stream to induce a fluorescence response in those particles having a fluorescent signature such as biological particles. some of said particles. A illuminated particle having a fluorescent signal above a threshold signal would trigger a sorter module that would separate that particle from the particle stream.
摘要:
An apparatus for selected measurement of in particular luminescent and/or fluorescent radiation has a plurality of measurement light paths (M1, M2, M3), which each have their own measuring devices optimized for the particular measurement mode. As a common device, a filter holder (5) is used, in which the detector and each of the measuring devices have access to each of the openings of the filter holder, and each of these openings can be equipped with an emissions filter that is expedient for the particular measurement mode involved. The result is an especially compact arrangement of a multipurpose measuring instrument with measurement properties that is largely equivalent to the measurement properties of special individual measuring instruments and that is also suitable in particular as an individual instrument for special luminescence measurements, such as BRET measurements.
摘要:
A compact and low-cost fluorescence reading apparatus capable of detecting multiple wavelengths is provided. The apparatus employs a semiconductor nanoparticle (201) as a fluorescent substance so as to enable a plurality of kinds of fluorescent substances to be simultaneously excited by a single excitation light source (220). Alternatively, the plurality of kinds of fluorescent substances are simultaneously excited by the application of a voltage.
摘要:
Methods and systems are disclosed for analyzing signals that exhibit time decay such as luminescent signals. The signal is detected using at least two predetermined integration periods that are offset by ninety degrees with respect to a fundamental excitation frequency. The characteristics of the signal are determined by processing the signals detected during the at least two integration periods. A surface comprising a plurality of signal producing features, such as an array of such features, may be analyzed in accordance with the present invention. Relatively inexpensive area sensor detectors may be employed in the analysis of such arrays.
摘要:
The invention relates to a method and measuring device for determining at least one luminescence, fluorescence, or absorption parameter of a sample, including an excitation light source supplying the excitation radiation directed onto the sample, a detector unit for detection of the emission radiation (i.e., the radiation to be measured) given off by the sample, and an acousto-optical tunable filter (AOTF) being provided in the radiation path of the excitation radiation and/or in the radiation path of the emission radiation. The ultrasonic oscillations of the acousto-optical filter are excited by a high-frequency oscillator, which is furnished with a unit for amplitude modulation in the form of a rectangular, Gaussian, Hann, or Hamming window, thus providing an optical switch with switching times in the nullsec range.
摘要:
The present invention provides a biochip reader for reading with a detector the fluorescence image information from genes to which fluorescent substances are stuck and which are poured into biochip cells, by emitting coherent light beams such as laser light onto the cells as excitation light. The present invention aims to achieve a biochip reader that is small, cheap, and highly durable.