Spectro Analytical Instruments Gmbh

Sai Gesellschaft Fur Analytische Mebgerate Mbh

Wolfram Bohle

Heinz-Gerd Joosten

Ulrich Heynen

Rolf Friedrich Frueke

Alexander Morlang

A spectrometer may include a radiation source having a spark generator, an entrance slit, a dispersive element and a plurality of detectors, and a rotatable sector shutter having an axis of rotation and a trigger unit optically coupled to the sector diaphragm. The axis of rotation of the sector shutter is non-parallel to a connecting line between the source and the entrance slit.

Spectrometer having a mechanical shutter

A spectrometer for examining the spectrum of an optical emission source may include: an optical base body, a light entry aperture connected to the optical base body to couple light into the spectrometer, at least one dispersion element to receive the light as a beam of rays and generate a spectrum, and at least one detector for measuring the generated spectrum. A light path may run from the light entry aperture to the detector. A mirror group with at least two mirrors may be provided in a section of the light path between the light entry aperture and the at least one detector, in which the beam does not run parallel, which may compensate for temperature effects. In the mirror group, at least one mirror or the entire mirror group may be moveable relative to the optical base body and may be coupled to a temperature-controlled drive.

Optomechanically compensated spectrometer

The invention relates to a spectrometer for analyzing the optical emission of a sample by means of pulsed excitation of an optical spectral emission, having an excitation source, a gap arrangement, at least one dispersive element and having detectors for the emitted spectrum, in which two beam paths are provided with two dispersive elements, the first dispersive element of which images the spectrum of the emission onto a number of spatially resolving detectors and the second dispersive element of which images the spectrum of the emission onto a number of time-resolving detectors.

Spectrometer comprising solid body sensors and secondary electron multipliers

The invention relates to a spectrometer for analyzing the optical emission of a sample, having an excitation source, an entrance gap and a dispersive element, which fans out the spectrum of the light generated in the excitation source in a plane, and having solid body sensors with one or more lines, which are arranged in the region of the focal curve of the beam path in order to evaluate the spectral information, wherein the sensors are arranged above or below the plane and the spectral emission is deflected onto the sensors by mirrors and focused, wherein the reflecting surface of the mirrors is aspherically formed in a direction of curvature.

Optical spectrometer element having non-spherical mirrors

In order to extend the available spectral range and to optimize spectral resolution while retaining a compact spectrometer setup, two diffraction gratings are operated with congruent focal curves in a Paschen-Runge geometry. The spectrometer features only one entrance slit and allows an adequate adaptation of the covered spectral range to the demands of analytical spectrometry. Apart from photomultiplier tubes commercial solid-state linear array sensors placed tangential at the Rowland circle are used for simultaneous detection of the spectrum. By employing angular cut cylindrical mirrors the radiation is deflected by 90% upward or downward in an alternating series. In this way two effects are achieved, an almost complete detection of the spectrum firstly and secondly a gain of intensity by focusing of radiation perpendicular to the plane of dispersion.

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Kleve, Germany

Wolfram Bohle