Abstract:
A device for use with a smart phone or tablet, the device comprising: a measurement device including a light source comprising a plurality of light emitting diodes for measuring one or more physiological parameters, the measurement device configured to generate an input optical beam with one or more optical wavelengths, wherein at least a portion of the one or more optical wavelengths is a near-infrared wavelength between 500 nanometres and 2500 nanometres; the measurement device comprising one or more lenses configured to receive and to deliver a portion of the input optical beam to a sample, wherein the sample reflects at least a portion of the input optical beam delivered to the sample; the measurement device further comprising a receiver to receive at least a portion of the input optical beam reflected from the sample; the light source configured to increase a signal-to-noise ratio of the input optical beam reflected from the sample, wherein the increased signal-to-noise ratio results from an increase to the light intensity from at least one of the plurality of light emitting diodes and from modulation of at least one of the plurality of light emitting diodes; and the measurement device configured to generate an output signal; the device configured to communicate with the smart phone or tablet, the smart phone or tablet comprising a wireless receiver, a wireless transmitter, a display, a voice input module, a speaker, and a touch screen, the smart phone or tablet configured to receive and to process at least a portion of the output signal, wherein the smart phone or tablet is configured to store and display the processed output signal, wherein at least a portion of the processed output signal is configured to be transmitted over a wireless transmission link.
Abstract:
An infrared detection system comprises the following elements. A laser source provides radiation for illuminating a target (5). This radiation is tuned to at least one wavelength in the fingerprint region of the infrared spectrum. A detector (32) detects radiation backscattered from the target (5). An analyser determines from at least the presence or absence of detected signal in said at least one wavelength whether a predetermined volatile compound is present. An associated detection method is also provided. In embodiments, the laser source is tunable over a plurality of wavelengths, and the detector comprises a hyperspectral imaging system. The laser source may be an optical parametric device has a laser gain medium for generating a pump beam in a pump laser cavity, a pump laser source and a nonlinear medium comprising a ZnGeP2 (ZGP) crystal. On stimulation by the pump beam, the ZnGeP2 (ZGP) crystal is adapted to generate a signal beam having a wavelength in a fingerprint region of the spectrum and an idler beam having a wavelength in the mid- infrared region of the spectrum. The laser gain medium and the ZnGeP2 (ZGP) crystal are located in the pump wave cavity.
Abstract:
Die Erfindung betrifft ein Spektrometer mit einer ersten Lichtquelle (12), die Lichtstrahlung (24) in einem ersten Wellenlängenbereich erzeugt, einer zweiten Lichtquelle (14), die Lichtstrahlung (26) in einem zweiten Wellenlängenbereich erzeugt, einer Spiegeleinheit (16) zur Umlenkung der Lichtstrahlung (24, 26) in eine Messstrecke (18), wobei die Strahlung (24, 26) beider Wellenlängenbereiche die Messstrecke (18) auf dem gleichen optischen Pfad durchläuft, einem Detektor (20) zum Nachweis der die Messstrecke (18) durchlaufenen Strahlung (24, 26) und mit einer Auswerteeinheit (22) zum Auswerten der auf den Detektor (20) auftreffenden Strahlung (24, 26) und Bestimmen einer Konzentration einer in der Messstrecke (18) vorliegenden Messgaskomponente. Um ein verbessertes Spektrometer bereit zu stellen, mit dem auf kostengünstige Weise eine Mehrkanaligkeit erreicht werden kann und ein entsprechendes Verfahren zum Betrieb eines solchen Spektrometers bereit zu stellen, wird vorgeschlagen, dass die Spiegeleinheit (16) als Mikrospiegelarray (32) ausgebildet ist und ein einzelner Mikrospiegel (34) nur einen Teil der Strahlung (24, 26) umlenkt.
Abstract:
An infrared LASER diode based high intensity light (100) for use as an aircraft landing light or searchlight in conjunction with night vision imaging systems. The high intensity light (100) uses infrared LASER diodes (110) installed into a heat sink (112) for temperature stability. The infrared light emitted from the LASER diodes (110) is transmitted to an optical positioning plate (106) by optical transmission means (108). The optical positioning plate (106) combines the emissions of the individual LASER diodes (110) to a single infrared light beam, which is collimated by an aspheric lens (102).
Abstract:
A method of calibrating an absorption spectroscopy measurement wherein the calibration method includes projecting laser light throu a sample of a first quantity of a gas of interest and a second irrelevant quantity of a spectroscopically identical or similar gas (10). The first and second spectroscopic absorptions of the laser light are measured over specific first and second absorption lines. A functional relationship is determined between the first and second measured spectroscopic absorptions and two unknown variables. The function relationships may then be simultaneously solved to determine one or both unknown variables and thereby obtain a measurement relati to the first quantity of the gas of interest, calibrated for the second irrelevant quantity of gas.
Abstract:
A field test-kit for analyzing arsenic concentration in water samples is provided. The kit includes a portable infrared beam photometer for measuring light absorbance in aqueous specimens. An infrared light emitting diode is configured to direct a beam of light through a specimen. A photodetector diode measures the intensity of light passing through the specimen. The photodetector output voltages relate to the light absorbed in the specimen and are displayed on a liquid crystal display screen. The kit is assembled using off-the-shelf electronic and opto-electronic components that have low power requirements. Dry cell batteries or solar cells power the kit. To test for arsenic, molybdenum based chemistries are used to selectively bind and convert arsenates and phosphates in the specimen into molybdenum-blue color complexes. The light absorbance of a specimen with both arsenates and phosphates bound in molybdenum-blue color complexes is compared to that of a reference specimen in which phosphates but not arsenates are bound and converted. The differential light absorbance of the two specimens is used to arrive at a quantitative value for the arsenic concentration in the water sample.