Raman Spectroscopy
Raman spectroscopy enables the analysis of gases, liquids and solids. In this process, scattered light is used that is produced by irradiating a substance with monochromatic light, called Raman scattering. The aim of Raman spectroscopy is the determination of vibrational and rotational states of molecules and their characterization in groups for the determination of structure and compound of a material. In order to obtain the useful information, the Raman scattering must be filtered out of the beam path.
The Raman effect results from intensive monochromatic laser irradiation of a sample and the associated excitation of molecules. The lines in the scattering spectrum of the molecules differ in their frequency from the lines of the incident light. This circumstance is based on the interaction between electromagnetic radiation and electron sheath, which results in molecular oscillations and rotations. A large part of the laser light shines through the sample. A very small part of the laser light is scattered in all directions of space, called elastic or Rayleigh scattering. The minimal residual scattering detected by the spectroscope is the inelastically scattered Raman scattering, which contains the necessary information to the fabric sample.
For the detection of Raman scattering by a spectrometer, the blocking of simultaneously occurring scatterings - such as those of the more intense Rayleigh scattering - is necessary (see figure 1). Special filters allow unwanted scattering to be blocked and allow only the desired Raman scattering to pass through. For optimum filter results, efficient, high-quality filter coatings are required. asphericon's durable dielectric-based filter layers guarantee stress-reduced transitions in the fitting and blocking area for optimum results.
In addition to precise filters for the wavelength separation of laser light, you can also choose from a wide range of high-quality optics. For example, a completely diffraction-limited optical system that convinces not only with its best image quality but also with its compressed design. This saves space and material costs. Please do not hesitate to contact us, together we will find an optimal solution for your product.
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Looking for a custom solution? Discover our customized aspheres with unsurpassed surface quality.
Custom Aspheres at a gance
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Looking for an individual solution? Discover our customized acylinders with excellent surface quality.
Custom Acylinder at a gance
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High-end optical coatings for each application – in outstanding quality, with reasonable delivery times and the reliable asphericon service. Equipped with state-of-the-art manufacturing and measuring technologies, our experienced team of technicians can turn your coatings ideas into reality.
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The asphericon system covers a wide wavelength spectrum. Design wavelengths of 355, 532, 632 and 780 to 1064 nm. An intelligent assembly concept saves time-consuming adjustments and ensures precision and flexibility. Discover the advantages of aspherical beam expansion for your application!
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With a|TopShape and a|AiryShape asphericon expands the BeamTuning product range with two newly developed beam shapers. Based on aspheric optics, the two modular components enable uncomplicated transformation of Gaussian laser beams into different Top-Hat profiles. Thanks to the most precise production technology, the modules convince with quality at the highest level and can be used in many ways.
asphericon GmbH
Stockholmer Str. 9
07747 Jena
phone +49 (0) 3641 3100 500
fax +49 (0) 3641 3100 501
sales[at]asphericon.com
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