Abstract:
A spectrometer according to this disclosure includes optical means for receiving radiation from a region which may or may not contain particular materials to be monitored. Spectrum display means is provided for displaying the spectrum of received radiation. A first output means having first apertures is disposed to pass an image of absorption lines associated with the particular material being monitored, and second output means having second apertures is disposed to pass an image of continuum associated with the particular material.
Abstract:
There is provided a method for referencing and correcting the beating spectrum generated by the interference of the components of a frequency comb source. The proposed method allows monitoring of variations of a mapping between the source and the beating replica. This can then be used to compensate small variations of the source in Fourier transform spectroscopy or in any other interferometry application in order to overcome the accuracy and measurement time limitations of the prior art. Constraints on source stability are consequently reduced.
Abstract:
A system and method is provided for improved fluorescence decay time measurement. A digital heterodyning technique is disclosed in which a photon detector is sampled at a rate slightly faster than a digitally pulsed excitation signal. A resulting cross correlation frequency is low enough to be read by inexpensive electronics such as by a field programmable gate array. Phase information in the signal provides correlation with corresponding photon detections.
Abstract:
A correlation interferometric spectroscopy devices are described that detect the spectral characteristics of a sample wherein device consists of an electromagnetic radiation source for exciting a sample with photons; and a detector adapted to detect an arrival time of a photon at the detector and further adapted to detect a delay between the arrival time of different photons. The device may further consist of an autocorrelator adapted to analyze the between the arrival of photons at the detector. The device may also be used together with other spectral detection and characterizing systems, such as Raman spectroscopy and attenuated total reflectance spectroscopy. Also provided herein are methods, systems, and kits incorporating the correlation interferometric spectroscopy device.
Abstract:
Application of digital light processor (DLP) systems in monochromotor, spectrophotometer or the like systems to mediate selection of individual wavelengths, and/or to image elected regions of a sample in an imaging ellipsometer, imaging polarlmeter, imaging ref lectometer, imaging spectrophotometer, and/or to provide chopped beams.