Abstract:
A light beam is passed through a cuvette, through which flows liquid to be analyzed optically for concentration of color reacted amino acids. The emergent beam is directed through a series of dichroic beam separators and pass band filters to produce three beams of substantially three different wavelengths. Photoelectric detectors produce electrical signals corresponding to each of the three wavelengths. Two of the signals are characteristic of the substance to be detected. The third is subtracted from the other two wavelength signals to produce a pair of output signals from which base line noise has been substantially eliminated.
Abstract:
An infrared source (200) which provides a miniature, highly stable and efficient source of infrared energy for use with infrared detectors and the like. The infrared source of the invention incorporates a platinum resistance temperature detector (RTD) (302) which is integrated with the heater element (306) to provide a means of electronic servo control of the heater temperature. The heater element (306) and the RTD (302) are tightly coupled thermally to provide accurate, continuous tracking and control of the heater temperature. The infrared source design provides excellent infrared energy output with less than one watt input power to the heater.
Abstract:
An apparatus for determining the quality of meat comprising a probe (1) to be inserted into a piece of meat which is to be examined and reflection measuring means placed in the probe having a light emitter (2) and a light receiver (3). A reference light receiver (4) which controls the supply to the light emitter (2) is placed in the probe near the light emitter. The servo link formed will compensate for the fluctuating efficiency of the light emitter (2) and the light receiver (3). The intensity of the light emitter may automatically be kept at a constant level.
Abstract:
Die Erfindung betrifft eine Vorrichtung (1) zur Emission elektromagnetischer Strahlung, insbesondere UV-Strahlung, die zumindest ein Strahlungsmittel (2) aufweist, das lediglich Strahlung in sichtbaren Wellenlängen emittiert. Erfindungsgemäß umfasst die Vorrichtung eine Einrichtung zur Erkennung eines Funktionsfehlers des Strahlungsmittels. Zweckmäßigerweise ist das Strahlungsmittel (2) zur Emission von lediglich UV-Strahlung und/oder IR-Strahlung vorgesehen und durch eine Leuchtdiode gebildet. In einer Ausgestaltung der Erfindung ist die Erkennungseinrichtung (3) zur kontinuierlichen Überwachung des Strahlungsmittels (2) auf Funktionsfehler eingerichtet und die Vorrichtung (1) weist eine Steuer- oder/und Regelungseinrichtung (4) auf, die dazu vorgesehen ist, das Strahlungsmittel (2) bei Erkennung des Funktionsfehlers durch die Erkennungseinrichtung (3) automatisch außer Betrieb zu setzen und/oder den Funktionsfehler anzuzeigen.
Abstract:
A method for identifying a target polymer (20) comprises translocating a target polymer (20) having detectable elements (22), such as fluorophores (22), through an analysing device (24) comprising a nanopore (28) having a detection window (40), wherein the analysing device (24) is capable of plasmon resonance to produce a localised electromagnetic field which defines the detection window (40) detecting the detectable elements (22) as they pass through the detection window (40) to produce a distribution profile of the detectable elements (22) along the target polymer (20) and identifying the target polymer (20) by comparing the distribution profile to a reference set of distribution profiles for known polymers. In a preferred embodiment the target polymer (20) is a nucleic acid and the detectable elements (22) are oligonucleotides complimentary to at least two adjacent nucleotides therein. Exemplified is the use of 6-mer oligonucleotides.
Abstract:
A control apparatus (600) includes a data acquiring unit (600a) configured to acquire a measured signal obtained by measuring light emitted from a test object onto which light is irradiated, a processing unit (600b) configured to calculate an objective function that varies in accordance with a statistical value obtained by statistically processing the measured signal, and a controller (600c) configured to control a modulation amount of a wavefront of the light irradiated onto the test object so as to minimize the objective function.
Abstract:
A device for determining the composition of a mixture of fluids that flow along a pipe, which comprises: a radiation source for illuminating the mixture with radiation; a detector for detecting radiation that has been attenuated by the mixture; a device for monitoring the flow rate of fluid along the pipe and outputting a signal indicative of the flow rate. The device includes a device for adjusting the intensity of radiation emitted by the radiation source in response to the signal indicative of the flow rate so that the intensity of the radiation source is reduced if the flow rate reduces.