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IR optical filters, Custom Optical Interference Filters
Optical Bandpass filters isolate specific regions of the spectrum, simultaneously providing high transmission of desired energy, and deep rejection of unwanted energy. Available in wide or narrow bandwidths, they can be tailored to suit your specific requirements. Optical Bandpass Filters are ideal for a variety of applications, spectroscopy, imaging. These filters are typically used in the life science, industrial, or R&D industries.
Alkor Technologies can design and fabricate custom bandpass filters to suit your particular requirements. Every phase of the process is performed in-house, including thin-film coating design, mechanical design, substrate fabrication and polishing, coating, inspection.
We can coat a variety of substrate materials, including Germanium, Sapphire, Silicon, Zinc Sulfide, and Zinc Selenide.
1. Different types of cut-off filters
Short-wavelength blocking filters are designed and manufactured to pass the long-wave radiation and to block short-wavelength radiation.
Long wavelength blocking filters block longwave radiation and transmit short wavelengths of the spectral working range.
2. Narrow band filters
Narrow band filters for 3.06 and 3.4microns
Narrowband filters are designed and manufactured to pass light in a narrow spectral range (Δλ0.5 <0.25λmax) and block all other wavelengths in the work area.
Narrow band filter for 7.73microns
3. Custom IR Bandpass filters
Bandpass filters transmit radiation with a wavelength in a wide spectral range (Δλ0.5> 0.25λmax) and block all other wavelengths in the spectral region of the working
Broadband filter on Si substrate
Broadband filter on Germanium substrate
All transmission curves are given as examples. We make custom solution by your specifications. Transmission and refelection measured on IR Fourie spectrometer FSM1201.
Optical Bandpass Filters are angular sensitive, so care should be taken when mounting or integrating into an optical system.