Abstract:
A downhole system in which an agile light source is used to simulate an integrated optical element to measure one or more characteristics of a fluid in a wellbore. The downhole system is both rugged and compact and allows spectral measurements of samples using a broad spectral band with a reduced number of physical components.
Abstract:
There is provided a method and system for real time inspection of a silicon wafer. The method includes using an infrared plane polariscope to obtain an image of a bonded interface of the silicon wafer, the image showing stress patterns; and assessment of the stress patterns. The stress patterns in a form of at least one butterfly pattern indicates a presence of at least one of: at least one trapped particle, trapped gases and at least one de-bonding region. No computer/algorithm processing is carried out to locate defects/de-bondings at the bonded interface. Furthermore, the stress fields being generated can be used to approximate the size of the de-bonding region/trapped particle. The system employs the infrared plane polariscope to obtain an image of a bonded interface of the silicon wafer.
Abstract:
A measuring device comprises a first optical sensor row (200) and a second optical sensor row (202) between which a planar object (204) to be measured is placed. The direction of the first sensor row (200) and the direction of the second sensor row (202) differ from one another. Each sensor (208) of the first sensor row (200) forms data representing a distance between the object (204) to be measured and the sensor (208). Each sensor (210) of the second sensor row (202) forms data representing a distance between the object (204) to be measured and the sensor (210) in order to determine at least one property of the object (204) to be measured on the basis of said data.
Abstract:
Controlled optical sensor device (10) including an optical emitter (21) generating an optical radiation (23), in particular in the visible or infrared field, and an optical receiver (22) to detect said optical radiation (23) upon interaction with a medium to be measured (24), a driving current (Ip) of said optical emitter (21) setting the intensity of said radiation (23) being controlled by driving means (50, 40) included in said optical sensor (10). According to the invention, said driving means (50, 40) include a microcontroller (50) configured to access calibration and/or compensation parameters and to adjust said driving current (Ip) as a function of said calibration and/or compensation parameters.
Abstract:
This invention relates to apparatus and methods to detect a target analyte in a test sample by forming a fluorescent complex comprising the target analyte and a probe. The fluorescence decay and/or lifetime changes upon complex formation. The apparatus includes a pulsed light source and a digitizer to measure fluorescent decay and/or lifetime of the fluorophore in the complex
Abstract:
The invention features a method including: (i) providing spectrally resolved information about light coming from different spatial locations in a sample comprising deep tissue in response to an illumination of the sample, wherein the light includes contributions from different components in the sample; (ii) decomposing the spectrally resolved information for each of at least some of the different spatial locations into contributions from spectral estimates associated with at least some of the components in the sample; and (iii) constructing a deep tissue image of the sample based on the decomposition to preferentially show a selected one of the components.
Abstract:
This invention relates to apparatus and methods to detect a target analyte in a test sample by forming a fluorescent complex comprising the target analyte and a probe. The fluorescence decay and/or lifetime changes upon complex formation. The apparatus includes a pulsed light source and a digitizer to measure fluorescent decay and/or lifetime of the fluorophore in the complex