MKS Inc., a provider of enabling technologies that transform the world, has announced Newport™ ODiate® Raman Longpass Filters, precision optical filters specifically designed for Raman spectrographs, at Laser World of Photonics 2025 in Munich.
Built on the advanced Newport ODiate thin film coating platform, ODiate Raman Longpass Filters are designed to deliver critical performance advantages for researchers and instrument manufacturers by enhancing signal clarity and simplifying system design.
Construction of the optical filters
The hard-coated dielectric construction of the optical filters ensures long-term environmental stability
These optical filters provide ultra-high optical density blocking of Rayleigh scatter (≥ OD 6), high transmission of Stokes Raman scattering (≥ 93% Tavg), and sharp wavelength transitions (edge steepness ≤ 0.5%).
This allows for the detection of low-wavenumber Raman signals with exceptional sensitivity resulting in a high level of desired signal vs background noise.
The hard-coated dielectric construction of the optical filters ensures long-term environmental stability, durability, and high laser damage resistance.
ODiate Raman Longpass Filters
ODiate Raman Longpass Filters are ideal for confocal Raman microscopy, portable Raman systems, and industrial Raman probes in research and industrial applications.
They empower high-precision measurements for material characterization, diagnostics, and drug discovery in such areas as materials science, biotechnology and medicine, forensics, and environmental science.
ODiate Raman Edge Filters
All filter configurations work in conjunction with MKS’s Newport Richardson Gratings
The ODiate Raman Edge Filters are optimized to block 488 nm, 532 nm, 632.8 nm, and 785 nm laser lines, with additional wavelengths planned to support a broader range of Raman systems.
Both standard and custom configurations are available. All filter configurations work in conjunction with MKS’s Newport Richardson Gratings, optimized diffraction gratings that are widely used in Raman spectrometers.
Diffraction grating and optical mounting solutions
“Raman longpass spectroscopy filters are essential for separating weak Raman signals from much stronger Rayleigh scattering,” said Dr. Glenn Mitchell, General Manager Newport Components and Vibration Control Business Unit.
He adds, "Spectrograph OEMs are continuously searching for value-driven options to optimize the performance of their measurement systems, ODiate Raman Longpass Optical Filters combine value and performance, providing Raman spectrograph systems with durable, precision optical filters that improve the all-important signal-to-noise measurement at an affordable price."
Dr. Glenn Mitchell continues, "These optical filters are yet another example of MKS’ commitment to enabling science and discovery, built on decades of providing market-renowned diffraction grating and optical mounting solutions for the Raman spectrograph market."
Customization Options
MKS is a recognized pioneer in precision optical systems, delivering high-performance solutions for demanding optical applications. The company collaborates closely with customers at both the application and system levels to design and manufacture custom optical filter solutions that meet or exceed performance requirements.
By staying at the forefront of trends in Raman spectroscopy, light source innovation, and detector technology, MKS ensures its filters are optimized for evolving needs. MKS optical solutions are available as individual components or as part of fully integrated optical sub-assemblies.
