Interference Filter (50mm)- 656nm C Line

SKU: 365C

Interference filters transmit only a narrow band of the spectrum and thus are essentially monochromatic filters. Three transmit at wavelengths 656nm, 589nm and 486nm corresponding to the C, D and F spectral lines respectively. The fourth filter transmits near 546nm (green) and is necessary for quantitative interference microscopy such as Berek or Senarmont compensation


Diameter (mm) 50.00
Diameter Tolerance (mm) +0.0 / -0.1
Thickness (mm) 5.00
Thickness Tolerance (mm) ±0.10
Center Wavelength CWL (nm) 656.00
Center Wavelength CWL Tolerance (nm) ±2.00
Full Width-Half Max FWHM (nm) 10.00
Full Width-Half Max FWHM Tolerance (nm) ±2.00
Minimum Transmission (%) ≥85
Blocking Wavelength Range (nm) 200 – 1200
Optical Density OD ≥4.00
Surface Quality 80 – 50
RoHS Compliant

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