Abstract:
A method and apparatus for automatically selecting test types for an analytical meter system based on the insertion into the meter of a test element. The test element can be an analytical element, formed by a test strip with a fluid such as blood applied thereto; a control element, formed by a test strip with control fluid applied thereto; or a standard element, or a standard strip exhibiting known optical properties. By inserting the test element into the analytical meter system, optical properties are measured and the existence of relationships between the measurements are ascertained. Based on the existence or nonexistence of certain relationships, the proper test can be automatically selected by the meter without the need for user interaction. Advantageously, the results of the test can be classified and stored according to test type.
Abstract:
In a exhaust smoke sensor a light emitter generates a light beam which passes through a region containing the exhaust gas to a first light sensor. To reduce interference the light emitter is driven by a near square wave signal produced by passing a square wave through a low pass filter.
Abstract:
Disclosed is a method for measuring the absorbance of light of a substance in a solution in a measuring cell (23; 223′), said method comprising the steps of: transmitting (S1) a first light beam (27; 27′) from a light source (25; 25′) towards a beam splitter (29; 29′); dividing (S3) the first light beam (27; 27′) into a signal light ray (31; 31′) and a reference light ray (33; 33′) by the beam splitter (29; 29′); modulating (S5) the signal light ray (31; 31′); modulating the reference light ray (33; 33′); providing (S9) the measuring cell (23; 23′) such that the signal light ray (31; 31′) passes through the measuring cell; detecting (S11) a signal in a detector (39; 39′), which signal is the combined signal intensity of the signal light ray (31; 31′) and the reference light ray (33; 33′) detected by the detector (39; 39′); performing synchronous detection (S15) of the detected signal in order to reconstruct the intensities of the signal light ray (31; 31′) and the reference light ray (33; 33′) from the combined signal detected by the detector (39; 39′), said synchronous detection being based on the modulation performed to the signal light ray and the reference light ray. Disclosed also is a measuring device for carrying out said method.
Abstract:
In the present invention, a fluorescent substance detection system (S) for detecting fluorescent substances in any environment is provided. Said detection system (S) comprises at least one illumination unit (1) which emits light to said environment in order to excite said substances; detection units (2), at least at a number equal to the number of types of fluorescent substances, for detecting emissions coming from said excited fluorescent substances and bandpass filters (3), each connected to detection units (2) one by one, wherein bandpass filters (3) have a center wavelength matched to the center emission wavelength of corresponding fluorescent substance.
Abstract:
A measurement system for measuring blood characteristics includes a controller, an emitter, a sensor, a reference photo sensor, and a mask. The emitter emits light at a plurality of wavelengths from a first side of a blood flow channel to a second side of the blood flow channel. The sensor is provided on the second side of the blood flow channel. The reference photo sensor is provided on the first side of the blood flow channel. The mask is provided on the first side blocking reflected light other than from the light from the emitter to enter the reference photo sensor. The controller compensates measurements from the sensor based upon measurements from the reference photo sensor.
Abstract:
A method for controlling a spectrometer for analyzing a product includes steps of: acquiring a measurement representative of the operation of a light source, determining, depending on the measurement, a value of supply current of the light source, and/or a value of integration time of light-sensitive cells of a sensor, disposed on a route of a light beam emitted by the light source and having interacted with a product to be analyzed, and if the integration time and/or supply current value is between threshold values, supplying the light source with a supply current corresponding to the determined supply current value, adjusting the integration time of a light-sensitive cell to the determined integration time value, and acquiring light intensity measurements supplied by the sensor, enabling a spectrum to be formed.
Abstract:
A detection system that includes an emitter, a power supply source, a receiver, a detector, and a processor. The emitter includes a light-emitting diode that emits a luminous signal. The power supply source applies a constant voltage to the light-emitting diode. The receiver senses the luminous signal emitted by the light-emitting diode and generates a first input signal representative of the luminous signal detected. The detector measures the current passing through the light-emitting diode and generates a second input signal representative of the current measured. The processor is connected to the receiver and provides an output signal as a function of the first input signal and of the second input signal.
Abstract:
The present disclosure, among other things, describes a reader system for analyzing one or more analytes in a fluid sample, comprising a casing (204) with at least one port (201) leading to a holster (301) which is configured to receive a cartridge (107) comprising a vertically oriented immunoassay device for analyzing one or more analytes in a fluid sample, an optical system (121) with excitation optics comprising a light source (302) and an excitation lens (305) configured to transmit light from the light source (302) and thereby excite a region of the vertically oriented immunoassay device when a cartridge (107) is placed in the holster (301), and collection optics comprising a photosensor (306) and a collection lens (307) configured to collect emitted light from the vertically oriented immunoassay device when a cartridge (107) is placed in the holster (301), an electromechanical motor system (106) configured to move the holster (301) in a vertical direction with respect to the optical system (121) so that the optical system (121) can interrogate different regions of the vertically oriented immunoassay device when a cartridge (107) is placed in the holster (301), and one or more digital processors (104a, 104b) and associated electronics configured to receive data from and control the optical system (121) and to control the electromechanical motor system (106).
Abstract:
An automatic analyzing apparatus which can make an adjustment to a target temperature so as to stabilize the light intensity of an LED and also can make the adjustment to that temperature in a short time is provided. The automatic analyzing apparatus in which an LED is used for a light source 114 includes a temperature adjusting mechanism 201 for the LED, and the temperature adjusting mechanism 201 includes a metal member 202 provided with the light source 114, a pair of metal pipes (water-flowing pipes) 203 buried in the metal member 202 and allowing constant-temperature bath water to flow therein, and pins (small metal piece members) 204 bringing only a heat-generating lead 252 of the light source 114 into direct contact with the metal member 202. Therefore, the temperature adjusting mechanism 201 can make an adjustment to a target temperature so as to stabilize the light intensity of the LED, and the adjustment to that temperature can be made in a short time.