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Optolong UBVRI Filter Set - 31mm Unmounted - UBVRI-31U

SKU: OTL-UBVRI-31U

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List price: $740.00

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Optolong UBVRI Filter Set - 31mm Unmounted


This photometric UBVRI filter set includes five 31mm unmounted filters: ultraviolet (U), blue (B), visual (V), red (R), and infrared (I).

The Optolong 31mm Unmounted UBVRI Filter Set is made with Schott glass that has been multi-coated with an ion-assisted deposition technology to ensure scratch resistance and stability on the central wavelength, or CWL. This filter set is designed to be used in color filter wheels that accept 31mm unmounted filters.



Quality Filter Materials:



  • Schott B260 substrate material from Germany, 2.0mm 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


About Optolong



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.

Description
Description

Optolong UBVRI Filter Set - 31mm Unmounted

This photometric UBVRI filter set includes five 31mm unmounted filters: ultraviolet (U), blue (B), visual (V), red (R), and infrared (I).

The Optolong 31mm Unmounted UBVRI Filter Set is made with Schott glass that has been multi-coated with an ion-assisted deposition technology to ensure scratch resistance and stability on the central wavelength, or CWL. This filter set is designed to be used in color filter wheels that accept 31mm unmounted filters.

Quality Filter Materials:

  • Schott B260 substrate material from Germany, 2.0mm 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

About Optolong

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.

Specifications
Specifications
Model Number UBVRI-31U
Filter - Single or Set? Filter Set
Filter Size 31 mm
Filter Type Wideband Imaging
Filter Shape Round
Mounted or Unmounted? Unmounted
Filter Set Contents Ultraviolet, Blue, Visible, Red, and Infrared 31mm Unmounted Filters
Filter Warranty Two Years
What's in the Box?
What's in the Box?
  • 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 Case
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