Abstract:
A fluorescence detection system comprises a light source configured to produce an excitation light, an optical lens and a fiber bundle. The optical lens is configured to focus the excitation light to a sample to emit fluorescence and to collect the fluorescence. The fiber bundle probe comprises a transmitting fiber configured to transmit the excitation light to the optical lens, and a first receiving fiber configured to deliver the collected fluorescence. The fluorescence detection system further comprises a first detector configured to detect the fluorescence delivered by the receiving fiber to generate a response signal, and a processing unit configured to determine information about the samples by analyzing the response signal. Additionally, a fluorescence detection method is also presented.
Abstract:
Multimodal optical spectroscopy systems and methods produce a spectroscopic event to obtain spectroscopic response data from biological tissue and compare the response data with preset criteria configured to correlate the measured response data and the most probable attributes of the tissue, thus facilitating classification of the tissue based on those attributes for subsequent biopsy or remedial measures as necessary.
Abstract:
A system and method for fluorescence excitation and detection having distinct optical paths is disclosed. A system for detecting fluorescence comprises a light source that emits an excitation light into an illumination tube; a plurality of collection optics located around an aperture in the illumination tube for collecting fluorescence; and a detector for determining the amount of fluorescence. A method for detecting fluorescence comprises emitting an excitation light from a light source into an illumination tube; directing the excitation light to an excitation filter; illuminating a sample with the excitation light to generate an emission light; and detecting the optical characteristics of the emission light using a plurality of collection optics located around the illumination tube.
Abstract:
Method and device for changing the illumination light and/or specimen light with respect to its spectral composition and/or intensity in an adjustable manner, wherein a spatial separation into the radiation components of different polarization is carried out with the first polarization means (Pol 1), a spectral spatial splitting of at least one radiation component is carried out with the first dispersion means (Disp1), and the polarization state of at least one part of the spectrally spatially split radiation component is changed, wherein a reflection of the illumination light and/or the detection light is carried out.
Abstract:
Device for controlling light radiation, which is excited in a specimen and/or which is backscattered and/or reflected and which contains one or more wavelengths, at a plurality of light outlets, wherein a separation of the light radiation into differently polarized components is carried out; and the components of the excitation radiation and/or detection radiation are affected in their polarization by means of a preferably birefringent, preferably acousto-optic or electro-optic medium, which changes the ordinary and extraordinary refractive index.
Abstract:
Multimodal/multispectral images of a population of cells are simultaneously collected. Photometric and/or morphometric features identifiable in the images are used to separate the population of cells into a plurality of subpopulations. Where the population of cells includes diseased cells and healthy cells, the images can be separated into a healthy subpopulation, and a diseased subpopulation. Where the population of cells does not include diseased cells, one or more ratios of different cell types in patients not having a disease condition can be compared to the corresponding ratios in patients having the disease condition, enabling the disease condition to be detected. For example, blood cells can be separated into different types based on their images, and an increase in the number of lymphocytes, a phenomenon associated with chronic lymphocytic leukemia, can readily be detected.
Abstract:
The present invention provides a technology called Pulse-Multiline Excitation or PME. This technology provides a novel approach to fluorescence detection with application for high-throughput identification of informative SNPs, which could lead to more accurate diagnosis of inherited disease, better prognosis of risk susceptibilities, or identification of sporadic mutations. The PME technology has two main advantages that significantly increase fluorescence sensitivity: (1) optimal excitation of all fluorophores in the genomic assay and (2) “color-blind” detection, which collects considerably more light than standard wavelength resolved detection. Successful implementation of the PME technology will have broad application for routine usage in clinical diagnostics, forensics, and general sequencing methodologies and will have the capability, flexibility, and portability of targeted sequence variation assays for a large majority of the population.
Abstract:
A fluorescence detector includes a light source being positioned so that in use, radiation emitted therefrom falls on one or more fluorescing species, and a photodetector being switchably connectable between a charge integrator device and a charge disposal device. The photodetector is positionable to detect fluorescent radiation from the fluorescing species. A controller communicates with the light source and the photodetector, and is operable in a cyclic manner to activate the light source to emit radiation and connect the photodetector to the charge disposal device for a first period of time, and connect the photodetector to the charge integrator device for a second period of time after the first period. The charge integrator device is not reset from one cycle to the next.
Abstract:
A method is proposed for detecting at least one chemical compound V contained in a medium (312). The method comprises a verification step (420) which is used to determine whether V is contained in the medium (312). The method furthermore comprises an analysis step (424) in which a concentration c of the at least one chemical compound V is determined.The verification step comprises the following substeps: (a1) the medium (312) is exposed to a first analysis radiation (316) of a variable wavelength λ, the wavelength λ assuming at least two different values; (a2) at least one spectral response function A(λ) is generated with the aid of the radiation (324) absorbed and/or emitted and/or reflected and/or scattered by the medium (312) in response to the first analysis radiation (316); (a3) at least one spectral correlation function K(δλ) is formed by spectral comparison of the at least one spectral response function A(λ) with at least one pattern function R(λ+δλ), the at least one pattern function R(λ) representing a spectral measurement function of a medium (312) containing the chemical compound V and δλ being a coordinate shift; (a4) the at least one spectral correlation function K(δλ) is examined in a pattern recognition step (418), and a conclusion is made as to whether the at least one chemical compound V is contained in the medium (312); The analysis step (424) comprises the following substeps: (b1) the medium (312) is exposed to at least one second analysis radiation (318) having at least one excitation wavelength λEX; (b2) at least one spectral analysis function B(λEX,λRES) is generated with the aid of the radiation (326) of the response wavelength λRES absorbed and/or emitted and/or reflected and/or scattered by the medium (312) in response to the second analysis radiation (318) of the wavelength λEX and the concentration c is deduced therefrom.
Abstract:
A system for detecting a predetermined wavelength of light emitted from an area on the surface of a chemical array is provided. Aspects of the system include: a beam splitter for splitting emitted light into two or more light beams and a detector for detecting photons in each of the two produced light beams. Methods of detecting light using the subject system, programming for performing the subject methods and an array reader containing the subject system are also provided.