Abstract:
A far-infrared image is directed onto a transducer having a planar array of absorbing discs on one side. The discs are supported by a thin membrane ich expands and bulges as the discs heat up. The discs thus change their spacing with respect to a partially reflective mirror. The nominal spacing between the discs and mirror is about 1/4 wavelength of the infrared radiation, such that absorption is enhanced. The mirror is supported on a transparent substrate through which visible or near-infrared light is shown, and carries a perforated mask atop an insulating layer and in registration with the discs. The mirror/discs thus establish a Fabry-Perot cavity for the visible or near-infrared light, whereby a visible or near-infrared image may be observed or detected as the various discs establish various spacings in accordance with incremental variations in the infrared image. An electrostatic field is established between the mirror and the shield by a voltage source. This field induces an electrostatic field in the discs to pre-bias the discs toward the mirror and thus to tune or adjust the sensitivity of the transducer.
Abstract:
A cavity ring-down system for performing cavity ring-down spectroscopy (CRDS) using optical heterodyne detection of a ring-down wave E.sub.RD during a ring-down phase or a ring-up wave E.sub.RU during a ring up phase. The system sends a local oscillator wave E.sub.LO and a signal wave E.sub.SIGNAL to the cavity, preferably a ring resonator, and derives an interference signal from the combined local oscillator wave E.sub.LO and the ring-down wave E.sub.RD (or ring-up wave E.sub.RU). The local oscillator wave E.sub.LO has a first polarization and the ring-down wave E.sub.RD has a second polarization different from the first polarization. The system has a combining arrangement for combining or overlapping local oscillator wave E.sub.LO and the ring-down wave E.sub.RD at a photodetector, which receives the interference signal and generates a heterodyne current I.sub.H therefrom. Frequency and phase differences between the waves are adjustable.
Abstract:
The collection of spectral information is enhanced through the formation of multiple zones of excitation and emission. In one embodiment, a plurality of the zones are located within a sample substance, thereby increasing the efficiency of sample spectrum collection. In another embodiment, a reference substance is positioned so as to enclose at least one of the excitation/collection zones. The reference substance adds a known spectrum to the collection path, enabling analytical instrumentation to compare the sample and reference spectra for calibration purposes. In a further embodiment, one of the zones may be positioned within a sealed volume, and compositional changes in the sealed volume may be detected and used for leak-detection purposes.
Abstract:
A scanning optical microscope or mapping system for spectrally-resolved measurement of light reflected, emitted or scatttered from a specimen is disclosed, in which the spectrally-resolving element is integrated into the detection arm of the microscope or mapping system to result in good photon collection efficiency as well as good spectral and spatial resolution. A confocal version of the microscope is disclosed which will be of particular interest in fluorescence microscopy, and the non-confocal mapping system will be of particular interest in photoluminescence mapping of semiconductor wafers.
Abstract:
A light source device includes light sources, a light output unit, optical filters, temperature sensors detecting current temperatures of the sources, light quantity sensors detecting current light quantities of light beams before traveling through the filters, a storage, and a processor. The storage stores first correlation information between the temperatures of the sources and spectral information and second correlation information between the spectral information and light quantity of light at the unit. The processor is configured to calculate a variation in the spectral information based on each current temperature and the first information, calculate a variation in the light quantity of the light at the unit caused by a change in the spectral information based on the variation in the spectral information and the second information, and calculate a light-quantity correction amount for each of the sources based on the variation in the light quantity and the current light quantity.
Abstract:
A chemical processing system for removing carbon dioxide from a gas mixture using a multicomponent amine-based scrubbing solution includes a spectroscopic evaluation system with a liquid contact probe for spectroscopic investigation, an energy source connected with the liquid contact probe to provide the spectroscopic stimulation energy to the probe, a spectrometer connected with the liquid contact probe to detect the spectroscopic response energy to the probe and to output spectral data corresponding to the spectroscopic response energy, and a machine learning spectral data analyzer connected to the spectrometer for evaluation of the spectral data to determine a concentration value for each of water, amine component and captured carbon dioxide in the scrubbing solution, the machine learning spectral data analyzer being trained for each such component over a corresponding trained concentration range, and optionally over a trained temperature range to provide a temperature-compensated concentration value.
Abstract:
The present disclosure relates to a method for calibrating an optical sensor, an optical sensor and a related electronic device. The method includes: acquiring a plurality of spectral detection values of ambient light collected by the optical sensor; acquiring a plurality of first parameter detection values of the ambient light and the corresponding plurality of second parameter detection values according to the plurality of spectral detection values, a type of the first parameter detection values being different from a type of the second parameter detection values; determining at least one effective detection value from the plurality of first parameter detection values according to the plurality of second parameter detection values; and calibrating the optical sensor according to the at least one effective detection value.
Abstract:
A spectrometer including: a spectral dispersion mechanism of an initial light beam; and a photodetector. The spectral dispersion mechanism includes at least three reflective diffraction gratings parallel to consecutive sides of a convex polygon, arranged such that a portion of the initial light beam is diffracted once by each diffraction grating in turn and is diffracted at least a second time by at least one of the diffraction gratings.
Abstract:
According to an exemplary embodiment of the present disclosure, apparatus and process for providing at least one radiation can be provided. For example, with at least one multi-mode waveguide, it is possible to transmit the radiation(s). In addition, with a shape sensing arrangement, it is possible To dynamically measure a shape of the multi-mode waveguide(s). Further, with a specifically programmed computer arrangement, it is possible to control a light modulator arrangement based on the dynamically-measured shape to cause the radiation(s) transmitted through the multi-mode waveguide(s) to have at least one pattern.