Upper Air FAQs
What kind of optical interference filters do the MFR, UVMFR, and SPUV use?
The MFR, UVMFR, and SPUV all use new technology "Ion Assisted Deposition" interference filters. The slit width and effective center wavelength are exceptional and stable. However, while the throughput/transmission of IAD filters is far superiror compared with previous generations of optical filter technologies, we still recommend that yearly factory calibrations.