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GCC-20 Interference Filters


Interference filters are fabricated by a series of thin layers of various dielectric materials sandwiched by glass substrates. When multi-wavelength light passes through the filter interference occurs due to the differences in refractive index, resulting in a very high transmittance for certain wavelengths, while other wavelengths are either reflected or absorbed. For a given wavelength a very narrow bandwidth (3nm-10nm) can be obtained. Optical interference filters are angle-sensitive and should be used with normal or near normal incident light. If the incident angle exceeds 20° it is essential to specify s-polarization, p-polarization or random (the average of s and p performance) when ordering. Filters for the major laser wavelengths are available from stock. Those for other wavelengths and dimensions may be custom designed. These filters are extremely durable and withstand repeated cleaning.

Every filter comes in an anodized aluminum housing for protection against humidity and handling. The highly reflective side of the filter should generally face the source to minimize the thermal load on the absorptive glass and epoxies.


High transmittance for certain wavelengths
Narrow bandwidth
Custom UV, VIS and IR filters available

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GCC-2010 UV Interference Filters

Center Wavelength (CWL):
±2nm
Full Width at Half Maximum Transmission (FWHM):
10nm ±2mm
Out-of-Band Blocking:
<0.1% (X-ray to 700nm)
Housing Diameter:
25.4 ± 0.15nm
Thickness:
6mm max
Clear Aperture:
> 20 mm dia


GCC-2010 UV Interference Filters

Catalog No. Center Wavelength (nm) Peak Transmittance Min (%)
GCC-201001 254.0 8
GCC-201002 280.0 25
GCC-201003 340.0 30
GCC-201004 365.0 30


GCC-2020 VIS & IR Laser Interference Filters

Center Wavelength (CWL):
±2nm
Full Width at Half Maximum Transmission (FWHM):
10nm ±2mm
Minimum Peak Transmission:
410 to 515nm/50%; 520 to 1550nm/60%
Out-of-Band Blocking:
<0.01% (X-ray to Far IR)
Temperature Range:
-50° C to +80° C
Center Wavelength Shifts:
<0.02nm/°C (linearly with temperature)
Housing Diameter:
25.4 ±0.15nm
Thickness:
6mm max
Clear Aperture:
>20mm dia


GCC-2020 VIS & IR Laser Interference Filters    

Catalog No. Center Wavelength (nm) Peak Transmittance Min (%)
GCC-202001 441.6 50
GCC-202002 488 50
GCC-202003 532 60
GCC-202004 632.8 60
GCC-202005
670
60
GCC-202006 830 60
GCC-202007 980 60
GCC-202008 1064 60
GCC-202009 1550 60

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