Acquisition of Raman Spectra at Low Wavenumbers

WITec’s Rayshield Coupler is now available for the alpha300 and alpha500 microscope series. It allows the acquisition of Raman spectra at wavenumbers down to below 10 rel. cm-1. This high-transmission coupler system includes a specialized narrow- band filter set which is optimally aligned to detect Raman lines extremely close to the Rayleigh line while maintaining ideal Rayleigh shielding.

Thus additional spectral information from Stokes and Anti-Stokes Raman signals can be obtained. The coupler is available for a variety of laser wavelengths from 488 to 785 nm.