Abstract:
Devices, methods and systems for making optical measurements of a fluid at elevated pressures and temperatures are disclosed. A cell is designed for the optical spectroscopic measurements of fluids or gas using light from ultra violet (UV) to far infrared wavelengths, among other wavelengths. A cell is described that is well suited for applications using very small fluid volumes, on the order of micro liters, such as microfluidic systems. Some described embodiments are suited for very high pressure and temperature environments (for example, 20 kpsi or greater at 175 degree C. or greater). Such conditions, for example, may be found in oilfield downhole environments. Some embodiments provide are inexpensive, and make use of replaceable lenses that are used as a pressure barrier and for collimation of the optical beam path for spectroscopic measurements.
Abstract:
The invention relates to a sensor for a spectrometer, comprising optical means onto which an excitation light source beam is directed and from which a target beam is emitted towards a sample to be analysed. The invention is characterised in that the optical means can move, thereby enabling the direction of the target beam to be varied.
Abstract:
The present invention relates to methods and systems for performing sample assays, and for producing and measuring optical responses and signatures. According to various embodiments, a system is provided that includes one or more LED (111), a temperature sensor (118), and a temperature regulator (122). The temperature sensor can be in thermal contact with the LED (111), can be capable of measuring an operating temperature, and can be capable of generating an operating temperature signal. The temperature regulator can be capable of receiving an operating temperature signal of the LED and regulating the operating temperature based on the operating temperature signal. According to various embodiments, a method for illuminating a reaction region (108) with excitation beams is provided. The method can include providing a system (100) that includes an LED (111) and a reaction region (108). The method can include generating excitation beams with LED; directing the excitation beams toward the reaction region measuring an operating temperature of the LED; and regulating the operating temperature by transferring heat away from and/or into the LED, based on the measured operating temperature. The reaction region includes a sample.
Abstract:
Systems and methods for operating, particularly in the field, a Raman spectroscopy device that includes a laser, a spectrograph, an intensified charge coupled device (ICCD), and an autofocus subsystem. Before spectral data acquisition commences a series of ancillary data checks is performed to monitor operating conditions of at least the laser, the ICCD, and the autofocus subsystem. Further, after each Raman spectrum acquisition, a series of data quality checks is performed to enhance confidence in the just collected data. Only spectral data that passes the data quality checks are further processed. However, all spectral data are stored in a log file. When the log file reaches a predetermined capacity, the log file is closed, and a new round of ancillary data checks is performed to again monitor the status of the Raman spectroscopy device.
Abstract:
An infrared spectrophotometer, which is capable of preventing measurement data measured from being adversely affected by moisture vapor. An internal space of an attachment receiving therein an optical element is sealed and isolated from ambient air by providing a tube and others, and a dehumidifier is provided in the internal space of the attachment for an optical path. Thus, the dehumidifier is disposed in a relatively narrow space, so that the internal space of the attachment can be efficiently dehumidified within a short period of time so as to reduce humidity in the internal space to suppress absorption of moisture vapor which would otherwise occur on the optical path in the internal space of the attachment. This makes it possible to prevent a negative influence of moisture vapor on measurement data, while reducing a standby time due to the dehumidification.
Abstract:
Die Erfindung betrifft eine Vorrichtung zur extrakorporalen Blutbehandlung mit einem Dialysator (10), der durch eine semipermeable Membran (11) in eine erste und zweite Kammer geteilt ist, wobei die erste Kammer (12) in einem Dialysierflüssigkeitsweg angeordnet ist und die zweite Kammer (13) mittels einer Blutzuführleitung (14) und einer Blutabführleitung (15) mit dem Blutkreislauf eines Patienten (1) verbindbar ist, einem Zulauf (20) für frische Dialysierflüssigkeit, einem Ablauf (30) für verbrauchte Dialysierflüssigkeit, einer in dem Ablauf (30) angeordneten Messeinrichtung (40) zur Bestimmung der Absorption der durch den Ablauf (30) fließenden verbrauchten Dialysierflüssigkeit, wobei die Messeinrichtung (40) wenigstens eine Strahlungsquelle (41) für im Wesentlichen monochromatische elektromagnetische Strahlung sowie ein Detektorsystem (42) zur Detektion der Intensität der elektromagnetischen Strahlung aufweist, wobei Mittel (50) vorgesehen sind, um auftretende Änderungen der Intensität der elektromagnetischen Strahlung der Strahlungsquelle (41) und/oder der Empfindlichkeit des Detektorsystems (42) zu kompensieren.
Abstract:
Increasing signal to noise ratio in optical spectra obtained by spectrophotometers. An interferometer introduces interference effects into a source light beam. A dual beam configuration splits the source beam having the interference effects into a reference beam and a sample beam. The reference beam interacts with a reference substance and is detected by a reference detector. The sample beam interacts with a sample substance and is detected by a sample detector. An optical spectra of the sample is based on the difference between the detected reference beam and the detected sample beam.
Abstract:
Time -resolved analysis of a spectrum is performed by illuminating a one -dimensional array of charge-transfer device light-sensitive pixel cells and periodically non-destructively copying charges in the light-sensitive cells to respective storage cells ('row storage registers') co-located with the light-sensitive cells in an integrated circuit. Information about the charges stored in at least some of the storage cells is provided to a component external to the integrated circuit.