Abstract:
A spectroscopic system may include: a probe having a probe tip and an optical coupler, the optical coupler including an emitting fiber group and first and second receiving fiber groups, each fiber group having a first end and a second end, wherein the first ends of the fiber groups are formed into a bundle and optically exposed through the probe tip; a light source optically coupled to the second end of the emitting fiber group, the light source emitting light in at least a first waveband and a second waveband, the second waveband being different from the first waveband; a first spectrometer optically coupled to the second end of the first receiving fiber group and configured to process light in the first waveband; and a second spectrometer optically coupled to the second end of the second receiving fiber group and configured to process light in the second waveband.
Abstract:
This relates to systems (600) and methods for measuring a concentration and type of substance in a sample (620) at a sampling interface. The systems (600) includes a light source (602), one or more optics (606, 610, 612), one or more modulators (634, 636), a reference (608), a detector (630), and a controller (640). The systems and methods disclosed can be capable of accounting for drift originating from the light source, one or more optics, and the detector by sharing one or more components between different measurement light paths. Additionally, the systems can be capable of differentiating between different types of drift and eliminating erroneous measurements due to stray light with the placement of one or more modulators between the light source and the sample or reference. Furthermore, the systems can be capable of detecting the substance along various locations and depths within the sample by mapping a detector pixel and a microoptics to the location and depth in the sample.
Abstract:
A multi-mode imaging spectrometer that incorporates two orthogonally positioned entrance slits and is configurable between a first mode in which the system produces images of relatively wide spatial coverage with moderate spectral resolution, using a first one of the two slits, and a second mode in which the system produces images of a smaller spatial area with fine spectral resolution, using the other one of the two slits.
Abstract:
Eine Spektrometer-Anordnung (10) mit einem Spektrometer zur Erzeugung eines Spektrums von Strahlung aus einer Strahlungsquelle auf einem Detektor (34), enthaltend eine abbildende, optische Littrow-Anordnung (18, 20) zur Abbildung der in die Spektrometer-Anordnung eintretenden Strahlung (16) in eine Bildebene, eine erste Dispersionsanordnung (28, 30) zur spektralen Zerlegung eines ersten Wellenlängenbereichs der in die Spektrometer-Anordnung eintretenden Strahlung, eine zweite Dispersionsanordnung (58, 60) zur spektralen Zerlegung eines zweiten Wellenlängenbereichs der in die Spektrometer-Anordnung eintretenden Strahlung, und einen gemeinsamen in der Bildebene der abbildenden Optik angeordneten Detektor (34), ist dadurch gekennzeichnet, dass die abbildende optische Anordnung (18, 20) ein zwischen zwei Stellungen (20, 50) bewegliches Element (20) umfasst, wobei die in die Spektrometer-Anordnung eintretende Strahlung in der ersten Stellung über die erste Dispersionsanordnung und in der zweiten Stellung über die zweite Dispersionsanordnung geleitet wird.
Abstract:
A spectrometer system includes a thermal light source for illuminating a sample, where the thermal light source includes a filament that emits light when heated. The system additionally includes a spectrograph for measuring a light spectrum from the sample and an electrical circuit for supplying electrical current to the filament to heat the filament and for controlling a resistance of the filament. The electrical circuit includes a power supply that supplies current to the filament, first electrical components that sense a current through the filament, second electrical components that sense a voltage drop across the filament, third electrical components that compare a ratio of the sensed voltage drop and the sensed current with a predetermined value, and fourth electrical components that control the current through the filament or the voltage drop across the filament to cause the ratio to equal substantially the predetermined value.
Abstract:
This invention relates to a spectroscopic apparatus for measuring at least two spectrally shifted spectral distributions of a light beam, said apparatus comprises a dispersive element adapted to generate a spatial dispersion of the spectral components in a light beam when said dispersive element is being illuminated by said light beam; and a detector adapted to measure the intensity of at least a part of said dispersed spectral components where said apparatus further comprises an optical shifting means adapted to illuminate said dispersive element in at least two different ways, such that said light beam hits said dispersive element differently, and whereby said dispersive element generates at least two spatially shifted spatial dispersions of the spectral components in said light beam. The invention further relates to a probing system comprising said spectroscopic apparatus for measuring at least two spectrally shifted spectral distributions of a light beam, and a method for measuring at least two spectrally shifted spectral distributions of a light beam.
Abstract:
A multiphoton pumped fluorescence lifetime imaging system in which inexpensive and easy-to-use deep part tomography lifetime imaging is realized through a combination of an ultrashort pulse laser, a laser scan fluorescence microscope, and high speed gating units. The multiphoton pumped fluorescence lifetime imaging system comprises an ultrashort light pulse laser generator (1), a laser scan fluorescence microscope (4), and high speed gating units (9, 11) disposed in front of the fluorescence detectors (10, 12) of the laser scan fluorescence microscope (4) wherein the ultra high speed shutters of the high speed gating units (9, 11) are pressed in synchronism with a pumping optical pulse from the ultrashort light pulse laser generator (1) and fluorescence is subjected to time resolution before being introduced to the fluorescence detectors (10, 12).
Abstract:
The invention provides a slit mechanism for an optical device, the slit mechanism comprising: one or more slits comprising a first slit defined by first and second slit jaws; a first displaceable portion configured for commanded displacement in an optical device, wherein forward and reverse displacements of the first displaceable portion respectively open and close the first slit jaw; a second displaceable portion, wherein forward and reverse displacements of the second displaceable portion respectively close and open the second slit jaw; a rotatable portion coupled to the first and second displaceable portions, wherein forward and reverse displacements of the first displaceable portion are translated via a rotation of the rotatable portion to respectively produce reverse and forward displacements of the second displaceable portion; and at least one stabilising flexure coupling the rotatable portion to an immobile anchor point; wherein the at least one stabilising flexure constrains movement of the rotatable portion to the rotation for translating the displacements.