Abstract:
A method and apparatus for measuring color coordinates of a light emitting device. The color coordinate measuring apparatus includes a rail on which a substrate is mounted, the substrate having a plurality of light emitting devices (LEDs) formed thereon, a transfer device disposed under the rail and configured to move toward or away from a target region of the substrate, a plurality of electrode pins disposed on the transfer device and configured to respectively contact electrodes of the plurality of light emitting devices in the target region at the same time when the transfer device approaches the target region, a controller configured to sequentially supply electric power to the plurality of electrode pins, and a measurement unit disposed above the rail and configured to be placed above the target region in which the plurality of electrode pins is brought into contact with the electrodes of the plurality of light emitting devices.
Abstract:
Provided are patterned nanoporous gold (“P-NPG”) films that may act as at least one of an effective and stable surface-enhanced Raman scattering (“SERS”) substrate. Methods of fabricating the P-NPG films using a low-cost stamping technique are also provided. The P-NPG films may provide uniform SERS signal intensity and SERS signal intensity enhancement by a factor of at least about 1×107 relative to the SERS signal intensity from a non-enhancing surface.
Abstract:
A fluorescence hyperspectral microscopy system featuring structured illumination and parallel recording includes a light projection sub-system, a detection sub-system, and an electrical controller. The light projection sub-system includes a digital light processing (DLP) module for generating linear excitation light, a first lens set, an optical path allocation element, and an objective lens. The detection sub-system includes a second lens set, a frequency-dividing reflection element, a two-dimensional light detector, and a light collection element. With the detection sub-system performing detection in conjunction with the light projection sub-system, and the electrical controller controlling the DLP module, a two-dimensional moving platform, and the two-dimensional light detector, the fluorescence hyperspectral microscopy system provides increased resolution and can obtain accurate information in spatial and spectral dimensions and hence a four-dimensional hyperspectral image of the object under detection.
Abstract:
A sample cell for IR spectrophotometric analysis of a liquid sample is provided. The sample cell comprises two substantially parallel transparent plates enclosing a cavity for holding the liquid sample, and a temperature control loop for controlling a temperature of the liquid sample in the cavity. The temperature control loop comprises at least one temperature sensor for measuring a temperature in or close to the cavity, at least one heating element for increasing a temperature of the liquid sample, and control means, coupled to the temperature sensor and the heating element for controlling the heating element in dependence of the temperature in or close to the cavity. The heating element comprises at least one heating foil which is attached to or thermally coupled to a first one of the transparent plates in such a way to allow an IR light beam to pass through the transparent plates and the cavity without being hindered by the heating foil.
Abstract:
In some aspects, a device for apportioning granular samples includes a sample feeder defining a conduit, the conduit including a first opening to receive the granular samples and a second opening. The device includes a shuttle operably coupled to the sample feeder to receive the granular samples from the conduit via the second opening. The shuttle is configured to apportion the granular samples to incrementally enter a sample chamber to be analyzed. The device includes an outlet conduit fluidly coupled to the sample chamber and configured to permit the sample chamber to be evacuated.
Abstract:
There are procedures typically used in auto body shops to assist in matching a proposed paint mix with that on undamaged portions of the vehicle. A test panel is taped to a stick and arranged next to the panel to be matched at a couple of angles. The present procedures are unrepeatable and often utilize two individuals. According to embodiments of the present disclosure, a wand has a test panel portion with embedded magnets. The test panel is attracted to the test panel portion via the magnets and the wand holds onto the vehicle panel also via the magnets. The lower side of the test panel portion that sits against the vehicle has at least two flat surfaces at different angles so that the wand can be placed on the surface of the vehicle, or other surface, to assess the paint match from the different angles.
Abstract:
An optical fluid analyzer tool may have an evaluation flowline which receives a flow of fluid from a geotechnical formation and may have a cleanup flowline which receives another flow of fluid from the geotechnical formation. A flow routing system may be connected to the evaluation flowline and may be connected to the cleanup flowline. The flow routing system may establish isolated flow or commingled flow for the evaluation flowline and may establish isolated flow or commingled flow for the cleanup flowline. A sample chamber may be connected to the evaluation flowline and may be connected to the cleanup flowline. A first pump module may draw the fluid from the geotechnical formation, and an optical fluid analyzer connected to the cleanup flowline and the evaluation flowline may analyze the fluid.
Abstract:
Various embodiments relate to a substrate for optical sensing by Surface Enhanced Raman Spectroscopy (SERS). The substrate comprises a support, a first layer consisting of a plurality of metal nanoparticles attached to the surface of the support, and a second layer consisting of a plurality of metal nanoparticles attached to the surface of the metal nanoparticles of the first layer, wherein the mean diameter of the metal nanoparticles of the first layer is greater than the mean diameter of the metal nanoparticles of the second layer. Various embodiments also refer to methods for forming the substrate. In a further aspect, various embodiments refer to a biosensor comprising the inventive substrate for the detection of an analyte in a sample by SERS, a method for the detection of an analyte in a sample by SERS using the biosensor, and use of the biosensor in SERS detection methods.
Abstract:
A cuvette comprising at least one insert with two measuring surfaces, wherein the insert is a measurement tip, which has the two measuring surfaces on one end, which is distanced from another end of the measuring tip, and an adapter for insertion in a cuvette shaft of an optical measuring device and means of insert and adapter for releasably holding the at least one insert in the adapter with the measuring surfaces at a separation distance from each other for the positioning of a sample between the measuring surfaces in a beam path of the optical measuring device passing through the cuvette shaft.
Abstract:
A shuttering and sealing device is disclosed. In one embodiment, the device includes an aperture through which light may pass to an optical sensor, a seal surrounding the aperture, and a shutter movable between an open position in which the shutter does not cover the aperture and a closed position in which the shutter covers the aperture and the seal seals the shutter around the aperture.