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EPP2000-R Spectometer
Models
Instruments for Ramen Detection
Raman spectroscopy uses a laser excitation source to
induce scattering from the targeted sample. The spectrometer is used to
detect this low-level return signal to identify the sample makeup. The
popularity of Raman is growing over the competitive IR analysis
technique because no sample preparation is required and silica fiber
optics and detectors are efficient and low cost in the VIS and NIR
wavelength regions. There are several popular laser excitation
wavelengths such as 532, 632, 670, and 785nm.
The standard StellarNet Raman spectrometer is
configured for a 785nm laser with optics to handle measurements in the
NIR range from 785-1150nm. If another range is desired, specify the
laser wavelength after the R in the spectrometer model number. This
provides a Raman shift range of 200-4000cm-1 to the right of
the laser line (Stokes). A slit is installed to set the optical
resolution and should match the laser line width. A 50um slit provides
2.4nm (~40 cm-1) resolution. A 25um slit would double that
resolution and unfortunately reduce the signal by 50%. Maximizing the
signal input, from the Raman probe, using fiber bundle circular-end to
line-end is important when a slit is used.
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Complete StellarNet Raman Systems Coming Soon!!!
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