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Optolong UBVRI photometric filter set - unmounted
This photometric UBVRI set contains five filters with dimensions � 36x2mm ultraviolet (U), blue (B), visual (V), red (R) and infrared (I). The set is made from quality brand-name glass, which has been multi-coated via ion beam assisted deposition to ensure scratch resistance and precisely-located central wavelength.
Quality Materials
Brand-name glass from Germany as the substrate, 36mm diameter, 2mm thick
- Multi-layer antireflective coating applied via electron beam physical vapour deposition and ion beam assisted deposition.
Quality finish
Filter substrates optically polished on both sides down to 1/4 lambda and with under 30 arc seconds non-parallelism
Polishing quality 60/40, in accordance with MIL-O-13830
A uniform and accurate coating method which ensures both high transmission in the passbands and high optical density in the off-band ranges
Each filter comes in a small plastic box with EVA packing.
Please note that this filter must never be used as the only solar filter!
