Abstract:
Ein Handgerät zur Erfassung photometrischer Daten verfügt über einen Meßkopf (4) zur Beleuchtung einer Meßfläche und zur Erfassung des remittierten Lichtes. Das vom Meßkopf (4) aufgefangene Meßlicht wird mit Hilfe eines ein Beugungsgitter (55) enthaltenden Monochromators spektral zerlegt. Mit Hilfe eines Photodetektors (62) wird die Intensität des durch eine Austrittsblende (61) austretenden Lichtes erfaßt. Die spektrale Lage des Meßlichtes wird mit Hilfe eines Antriebsmotors (31), der eine mit der Halterung (60) des Beugungsgitters (55) verbundene Gitterwelle (30) dreht, eingestellt. Aus den erfaßten Spektren werden mit Hilfe eines Rechners (63) densitometrische und farbmetrische Größen errechnet, die ebenso wie die erfaßten Spektren auf einem Anzeigefeld (10) darstellbar sind.
Abstract:
To provide sufficient sensitivity, spectral resolution and speed of measurement for field environmental measurements in a portable spectroradiometer, a silicon photodiode receives light: (1) having a bandwidth in the range of between 2 and 15 nm (nanometers) from a pivotable concave holographic diffraction grating within the wavelength range of between 250 and 1150 nm at a scanning rate in the range of 20 to 100 nm per second; (2) having stray light of high intensity and undesired frequencies and the shorter wavelength harmonics of the selected frequency range blocked by filters; and (3) having flux of a least 10 microwatts per square meter of diffuser plate for each nanometer of bandwidth. Automatic electrical zeroing is obtained by blocking all light once at the beginning of each scan, obtaining an electrical drift-related signal and using the drift signal to ad- just the measured signal during the scan. Several different sensing interfaces can be used, including a quartz, light fiber probe having at least a 50% packing density and a cone angle of at least 24 degrees. The data and the programming storage is at least 30K bytes but the instrument uses no more than two watts of power when the instrument is not scanning.
Abstract:
The present disclosure describes an optically powered transducer with a photovoltaic collector. An optical fiber power delivery method and system and a free space power delivery method are also provided. A fabrication process for making an optically powered transducer is further described, together with an implantable transducer system based on optical power delivery.
Abstract:
A lighting module with variable colors (1, 2) includes an elastic portion (11), a pressure sensor (12), a color detecting unit (13), and a light emitting unit (14). The elastic portion has an internal space. By applying a force (F), the elastic portion can be deformed so as to generate a pressure change of the internal space. The pressure sensor is coupled to the internal space of the elastic portion, and detects the pressure change of the internal space to output a color transformation signal (S 1 ). The color detecting unit is coupled to the pressure sensor. The color detecting unit receives the color transformation signal and is initiated based on the color transformation signal for detecting a color of a target to generate a color signal (S 2 ). The light emitting unit is disposed in the elastic portion, and emits a light corresponding to the color signal. In addition, a lamp (L) with the lighting module with variable colors is also disclosed.
Abstract:
A method for analyzing a mixture includes identifying a plurality of possible components of the mixture (402), calculating at least one feature for at least a portion of the plurality of possible components (404), and calculating a probability value for at least a portion of the plurality of possible components (408) based on the at least one feature and at least one transfer function
Abstract:
A hand-held, self-contained, battery-powered test instrument for analyzing composition of a sample includes an exciter for exciting at least a portion of the sample, a compact cross-dispersed spectrometer for receiving an optical signal from the excited portion of the sample and a processor for processing spectral data about the optical signal from the spectrometer. The exciter may include a spark generator and a counter electrode, a laser or other device for generating the optical signal from the sample portion. The spectrometer has a wavelength range broad enough to enable the test instrument to detect and determine relative quantities of carbon, phosphorous, sulfur, manganese, silicon, iron and other elements necessary to identify common alloys. The spectrometer includes a structural member made of a light-weight material having a small coefficient of thermal expansion (CTE). The spectrometer is dimensionally stable over a range of expected ambient temperatures, without controlling the temperature of the spectrometer.