Optolong UBVRI Filter Set - 31mm Unmounted
This high-performance UBVRI filter set by Optolong features five 31mm unmounted filters. These filters include ultraviolet (U), blue (B), visual (V), red (R), and infrared (I).
The Optolong 31mm Unmounted UBVRI Filter Set is produced using multi-coated Schott glass with an ion-assisted deposition technology to maintain stability and scratch resistance on the central wavelength (CWL). This filter set is designed to be used in color filter wheels that accept 31mm unmounted filters in a round format.
Quality Filter Materials:
- Schott B260 substrate material from Germany, 3.0mm thick
- Multiple layers of anti-reflection non-cementing coatings applied via electron-beam gun evaporation with Ion-assisted deposition
Optolong Filter Manufacturing Processes and Parameters
- Filter substrate is fine-optically polished to 1/4 wave and <30 parallelism over both surfaces
- Surface quality, according to MIL-O-13830, is 60/40
- Optolong’s planetary rotation system is a homogenous and precise coating procedure that ensures both high transmission of pass-band and optical density of off-band
- Each filter comes with a plastic case with high-pressure EVA case lining
Optolong is the Astronomy Filters division of Yulong Optics, an optical filter design, and processing company out of Kunming, China that has provided filters for over 700 optical companies since 1999. All Optolong filters pass European Union RoHS requirements and have been certified by TUV Rheinland and Bureau Veritas.
Optolong 31mm Ultraviolet (U) Filter
- Optolong 31mm Blue (B) Filter
- Optolong 31mm Visible (V) Filter
- Optolong 31mm Red (R) Filter
- Optolong 31mm Infrared (I) Filter
- Filter Cases
Dimensions & Specifications
Filter Size: 31 mm
Filter Type: Wideband Imaging
Filter Shape: Round
Mounted or Unmounted: Unmounted
Filter Set Contents: Ultraviolet/Blue/Visible/Red/Infrared 31mm Unmounted Filters
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At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.
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