638 nm Raman filters by Iridian Spectral Technologies

Aug. 15, 2013
Edge-pass optical filters for Raman spectroscopy at 638 nm from Iridian Spectral Technologies provide high transmittance (>90% absolute) and low ripple (OD 6 blocking at 638 nm.

Edge-pass optical filters for Raman spectroscopy at 638 nm from Iridian Spectral Technologies (Ottawa, ON, Canada) provide high transmittance (>90% absolute) and low ripple (<±2%) for Raman light, as well as an ultra-steep edge (cut-off < 50 cm-1) and >OD 6 blocking at 638 nm. Additional specifications include narrow bandwidth (~2 nm FWHM), high transmittance, steep roll-off, and wide blocking (3001200 nm), all reducing spectral noise without compromising transmittance at 638 nm.

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