Abstract:
The method and apparatus of the present invention provides a system wherein light-emitting diodes (LEDs) (162) can be tuned within a given range by selecting their operating drive current in order to obtain a precise wavelength. The present invention further provides a manner in which to calibrate and utilize an LED probe (150), such that the shift in wavelength for a known change in drive current is a known quantity. In general, the principle of wavelength shift for current drive changes for LEDs is utilized in order to allow better calibration and added flexibility in the use of LED sensors, particularly in applications when the precise wavelength is needed in order to obtain accurate measurements. The present invention also provides a system in which it is not necessary to know precise wavelengths of LEDs where precise wavelengths were needed in the past. Finally, the present invention provides a method and apparatus for determining the operating wavelength of a light-emitting element such as a light-emitting diode.
Abstract:
A system for spectral reading includes a plurality of LEDs, an interface, and a processor. The plurality of LEDs are disposed in a physical array. Light from the plurality of LEDs is enabled to be collimated at a Fabry-Perot etalon. The interface is configured to receive a gap calibration table and power characteristics of a plurality of LEDs. The processor is configured to determine an LED switch table. The LED switch table indicates a set of the plurality of LEDs with power above a threshold at a plurality of wavelengths. The processor is further configured to cause measurement of a sample using the gap calibration table and the LED switch table for a set of gap values and determine measurement results.
Abstract:
The wrist-mounted device (100) to assist pilgrims is an electronic device worn on the wrist that provides functions to assist a pilgrim, particularly a pilgrim on a pilgrimage to a holy site. The device (100) includes a heart rate monitor (202) that alerts the user when his or her heart rate is too high, a GPS unit (232) showing the location of holy sites of interest, a monitor (222) for keeping a count of the number of perambulations around a holy site, e.g., when performing a Tawaf, an audio playback device (230) that will play back a prayer or scripture, such as the Dua'a, and an annunciator for announcing prayer times.
Abstract:
본발명은로다민유도체, 이의제조방법및 이를이용한구리이온검출방법에관한것으로, 본발명의로다민유도체는아실하이드라자이드잔기의가수분해및 로다민잔기의스피로락탐개환을통한형광변화로 Cu이온을검출할수 있다. 또한, 수용액에서상기로다민유도체는 Cu이온에대한높은선택성및 민감성을가져다른금속이온으로부터 400초이내에나노몰(nM) 수준의검출한계로 Cu이온을검출할수 있다. 따라서, 본발명의로다민유도체는구리이온검출용조성물, 구리이온검출용형광화학센서또는구리이온검출용키트로화학, 생물학및 환경공학공정에활용될수 있다.
Abstract:
Bekannte Messanordnungen zur ortsverteilten Erfassung von Spektren sehen ein zentral angeordnetes Spektrometer vor, mit welchem an verschiedenen Orten aufgestellte Messköpfe über Lichtwellenleiter kommunizieren. Hierbei stellen bei größeren Anlagen die Kosten der hierfür benötigten Lichtwellenleiter, die jeweils von einem Messkopf direkt zum Spektrometer verlegt werden müssen, eine große Investition dar. Die vorliegende Erfindung soll eine Möglichkeit vorstellen, diese Kosten erheblich zu reduzieren. Dies gelingt durch einen Messkopf mit einem Multiplexer, der eine Reihenschaltung mehrerer Messköpfe ermöglicht. Hierdurch kann eine parallele Führung von teueren Lichtwellenleitern vermieden werden und es wird vielmehr nur eine Verbindung von einem zum nächsten Messkopf von den Lichtwellenleitern zu überbrücken sein.
Abstract:
The present invention relates to an apparatus for detecting photons according to an atmospheric condition, using a function of adjusting light quantity that can significantly improve reliability of an atmospheric condition analysis result by minimizing noise in a spectrum by maintaining the quantity of incident light uniform within a predetermined range regardless of atmospheric conditions and changes, and to a method of adjusting light quantity. The apparatus for detecting photons in accordance with atmospheric conditions using a function of adjusting light quantity includes: an apparatus case having a light inlet; a light quantity adjuster disposed under the light inlet and adjusting quantity of incident light such that a predetermined quantity of light travels inside; and a controller controlling operation of the light quantity adjuster in accordance with intensity of light detected by the light quantity adjuster.
Abstract:
The present invention concerns an apparatus and method for testing materials. More particularly, but not exclusively, this invention concerns an apparatus and method for testing materials which have a useable shelf-life. The invention also concerns an apparatus and method for testing materials which have a useable shelf-life dependent on the chemical degradation of the material. The invention provides a method of obtaining an indication of the lifespan of a chemically reactive material. The method comprises taking an infrared (IR) spectroscopic measurement (26) of the material. The measurement results are compared (28) to a database of previously obtained measurement results. Depending on the comparison (28) of the measurement result to the database of previously obtained measurement results, an indication (30) of a measure of the lifespan of the chemically reactive material is determined and provided. An infrared spectrometer (32) and a method of calibrating an infrared spectrometer is also provided.
Abstract:
The present invention relates generally to the field of biochemical laboratory. More particularly the invention relates to the improved and more accurate instrumental features of equipment used as e.g. fluorometers, photometers and luminometers. The object of the invention is achieved by providing an optical measurement instrument where there is an interface (218, 223, 233a, 233b, 238) for a changeable optical module (240), and excitation and/or emission beam is guided through an aperture of the optical module. This allows performing various types of measurements by changing an optical module without a problem lenses becoming unclean due to manual handling of the optical modules. The invention also makes possible to achieve an accurate measurement location and area within a sample.