Dielectric Narrow Notch Filter for Raman applications
514.5-12 NNF
Notch filters are designed to block a narrow range of wavelengths while allowing high transmittance in the passband. The deep blocking at the excitation laser line (OD > 6) delivers more signal with less background noise.
In Raman spectroscopy applications, a notch filter blocks the laser line allowing for easier observations of any Stokes and Anti-Stokes transitions.
Iridian notch filters are manufactured to achieve one of the narrowest blocking ranges available. Their sputtered hard dielectric coatings ensure superior performance, reliability and cost-effectiveness when compared to holographic notch filters.
| Specifications |
| CWL - Centre Wavelength (nm) |
514.5 |
| Blocking Level (OD) |
> 6 |
| Transmittance Band (nm) |
412 to 684 (except CWL) |
| Transmittance (%) |
> 90 |
| 50% Width (nm) |
12 |
| Angle of Incidence |
0° |
| Outer Diameter of ½" or 1" optics (mm) |
12.5 +0/-0.1 or 25 +0/-0.2 |
| Clear Aperture of ½" or 1" optics (mm) |
8 or 21 |
| Thickness (mm) |
3 ±0.1 |
| Ring mounted |
Yes |
| Scratch / Dig |
60/40 |
| |
Iridian website
