FLI Research Grade Filters
Our high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. We offer a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.
Features:
AR: Durable AR coatings on both exterior surfaces over applicable transmission range
Scratch Dig: 60/40 or better (max scratch width 0.006mm, max dig 0.40mm)
Transmitted wavefront @ 633nm: Better than 0.25 wave/inch
Wedge: Better than 30 arcsec
Thickness: 5 +/- 0.05mm, par focal +/- 0.2mm, (filters start par focal +/- 0.1mm per recipe)
- Filter Specifications
- Transmission curves
- U
- B
- V
- R
- I
- Lum
- Red
- Green
- Blue
- Ha
- SII
- OIII
These filters are A/R coated Johnson/Bessell filters that are blocked up to 1200nm

These filters are A/R coated Johnson/Bessell filters that are blocked up to 1200nm

These filters are A/R coated Johnson/Bessell filters that are blocked up to 1200nm

These filters are A/R coated Johnson/Bessell filters that are blocked up to 1200nm

These filters are A/R coated Johnson/Bessell filters that are blocked up to 1200nm









