Other

Columbia University

Mettler-toledo Autochem, Inc.

Christopher J Manning

Peter Alfred Blacklin

Alexander Van Geen

Nilesh Shah

Benjamin Bostick

An assembly of a closure with a container, for sealing of the container, comprises the container having an inner container surface defining a cavity opening to ambient through an opening, the closure comprising an upper portion and a lower portion, the lower portion having a lower lateral surface, the lower portion being adapted to be inserted into the opening of the container and two grooves provided on the lower lateral surface and adapted to receive two respective sealing members, the two grooves being separated by a predetermined distance, the two sealing members provided in the two respective grooves, the two sealing members being adapted to provide sealing between the lower lateral surface and the inner container surface, wherein the lower lateral surface, the inner container surface and the two auxiliary sealing members together define an annular space and a barrier sealant in the annular space.

Closure and an assembly of the closure with a container

An interferometer wherein an incident beam from a radiation source hits a beam splitter at a first oblique angle of incidence and is split into a first, reflected partial beam, and a second, transmitted partial beam, that subsequently travel along separate arms of the interferometer. The first and second partial beams are respectively intercepted, reflected, and re-split to form returning beam portions and reflected and transmitted exit beam portions. A second terminal mirror and a folding mirror, which intercepts the second partial beam at a second oblique angle of incidence, are associated with the second interferometer arm and positioned orthogonal to the reference plane and on opposite sides of the exit path, so that a section of the second partial beam from the folding mirror to the terminal mirror and back to the folding mirror crosses the exit beam twice.

Interferometer for Fourier transform infrared spectrometry

A groundwater sampling tool that includes an elongated hollow coring tube having a proximal end and a distal end for collecting groundwater and sediment; a Peltier element located in close proximity to a wall of the elongated hollow coring tube adapted to freeze groundwater and sediment collected by the elongated hollow coring tube.

Peltier freeze-shoe sampler to recover aquifer sediment and groundwater

A novel tilt-compensated interferometer geometry is described. The design uses tilt- and shear-compensation optics to simultaneously maintain high throughput and precise interferometric alignment, even in the presence of non-ideal scanning motions. The tilt-compensation mechanism consists of a novel beamsplitter/reflector assembly that produces two anti-parallel beams. A variety of enhancements to the basic design are described, providing a family of related interferometer designs. These interferometers have applications in spectrometry, spectral imaging and metrology.

Fourier-transform spectrometers

The tilt-compensated interferometers of the present invention are novel variations of Michelson's interferometer that use tilt- and shear-compensation to provide excellent photometric accuracy even when there are imperfections in the scanning motion used to produce variation of path difference. The tilt-compensation mechanism of the present invention consists of antiparallel reflections from a beamsplitter element and a roof reflector element, which elements are held rigidly in alignment. Several particularly useful embodiments of the invention are described. Other advantages of the present invention include photometric stability and reduced cost because manual alignment is not required. This interferometer has applications in spectrometry, spectral imaging and metrology.

Tilt-compensated interferometers

A novel variation of Michelson's interferometer uses tilt- and shear-compensation optics to allow various mirror motions to produce variation of path difference. The tilt-compensation mechanism consists of two complementary reflections from a single plane mirror and, in some cases, the beamsplitter, to produce a beam having a constant angle of propagation, typically the same as the input beam. Using a retroreflector to invert the image of a single plane mirror or a sequence of plane mirrors before the second reflections produces complementary reflections. A particularly efficient embodiment of the present invention uses one or more balanced disk-shaped mirrors to effect very rapid variation of path difference by nutation or precession. Other advantages of tilt-compensation include photometric stability. This interferometer has applications in spectrometry, spectral imaging and metrology.

Three or more frequency components are used as deformation waveforms to perturb a sample during spectroscopic measurement. Simultaneously measuring more than one frequency allows for multiplexing. Further, many frequencies insure that the optimal perturbation frequencies for a particular measurement are present. The multiplex advantage of a particular spectroscopic instrument may accrue simultaneously with a multiplex advantage in the characterization of the time dependence of the sample response.

Method and device for multiplexed spectro-rheological measurements

A spectrometer includes an actuator assembly, a mobile mirror assembly responsive to the actuator assembly, a balancing element responsive to the mobile mirror assembly, and a suspension mechanism operatively connected between the mobile mirror assembly, the balancing element and an optical support element in a relative position that isolates substantially all forces arising out of the actuation by the actuator assembly of the mobile mirror assembly and the balancing element.

Methods and apparatus for performing very rapid scan spectrometry using

A novel variation of Michelson's interferometer uses tilt- and shear-compensation optics to allow various mirror motions to produce variation of path difference. The tilt-compensation mechanism consists of two complementary reflections from a single plane mirror to produce a beam having a constant angle of propagation, typically the same as the input beam. Using a retroreflector to invert the image of the single plane mirror before the second reflection produces the complementary reflections. A particularly efficient embodiment of the present invention uses a balanced disk-shaped mirror to effect very rapid variation of path difference by nutation or precession. Other advantages of tilt-compensation include photometric stability. This interferometer has applications in spectrometry, spectral imaging and metrology.

Growing community of inventors

Moscow, ID, United States of America

Christopher J Manning