The Optigraph technology allows to manufacture HOPG of any fancy shape


cylindrical HOPG


Monochromators constitute nowadays an essential part of modern analytical instrumentation. Two main fields of application are diffractometry and x-ray fluorescence analysis (XRF).

In diffractometry flat or bent monolithic HOPG crystals are usually used for monochromatizing primary beams.

In XRF HOPG crystals can be employed both for the primary and secondary radiation, i.e. both in the excitation and detection channels. In the first case, monochromators help to form a primary beam with spectral parameters, which are optimal for excitation. They eliminate undesirable parts of a continuous spectrum or some of the characteristic lines, thus suppressing background and increasing correspondingly sensitivity of the analytical method. Besides, application of focusing geometry can considerably increase the intensity of the excitation line due to a larger angular acceptance and create a small focal spot on a sample, enabling thus local analysis with a high spatial resolution. In the second case, monochromators are applied for collecting the secondary (fluorescence) radiation and modifying its spectral distribution in favor of the lines of interest.

Especially promising are possible applications of monochromatic radiation in medicine, both for therapy and diagnostic. In this case HOPG optics is the best candidate due to large intensity output with sufficient spectral resolution.

Additional information about HOPG applications you can find in References section.

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