Access Low Wavenumber Raman Modes with New Nano-Edge Filters from Iridian
13 Sep 2013

Iridian Spectral Technologies Ltd. (Iridian), a leading global supplier of optical filter solutions, announces its new nano-edge long pass filters (nano LPFs). These edge pass filters have the steepest edge available on the market, offering unparalleled access to low frequency Raman modes.

Iridian’s nano-edge LPFs offer cut-offs of <26 cm-1, corresponding to 0.2% of the laser wavelength. This is even steeper than our market-leading ultra-steep LPF (cut-offs <40 cm-1)! These nano-edge LPFs also offer high transmittance out to 1200 nm (>90%), deep blocking at the laser line (>OD 6), and low ripple (<5%). These filters are manufactured using our state-of-the-art dielectric coating technology, producing robust and reliable thin film filters.

These extremely steep edges allow a user to access Raman modes that would be blocked by standard edge pass filters. For example, lattice modes can appear at very low Raman shifts and provide important structural information on a crystalline sample. By employing Iridian’s filters in a Renishaw InVia instrument, a mode at 15 cm-1 is clearly visible in the L-Cystine Raman spectrum.

Iridian has nano-edge LPFs at 488, 514.5, 532 and 785 nm available for purchase. Iridian is also happy to work with you to develop a solution for your specific optical filter needs. Please contact Iridian for further discussion of how our market-leading performance can benefit your Raman system.

Request Info


Company website

Tags: raman

Iridian Spectral Technologies
profile photo

Sarah Thomas
Editorial Assistant     




Write a Review

Join the Global SelectScience Community Today! It’s FREE!

Helping you make informed decisions about the latest lab products and technologies:

  • Be the first to learn about new technologies
  • 10,000+ trusted product reviews from your peers
  • Compare 500,000 products and manufacturers
  • Get exclusive buying tips from experts
  • Find solutions fast: 10,000+ Application Notes, Webinars and Videos

Connect with 250,000 scientists... All in one place!

Become a member today!