25mm Infared Beam Expanding Telescope
MODEL BET-25IR optimized for 3.39µm
| Type: | 25mm expander with spatial filter |
| Input: | f-1 positive meniscus |
| Diameter: | 12mm |
| Material: | Zinc Selenide |
| Transmission: | 97% @ 3.39 microns |
| Focal Length: | 12mm |
| Spatial Filter: | 15 micron pinhole with X-Y micrometer adjustments |
| Output Element: | f-6 positive meniscus |
| Diameter: | 25mm |
| Material: | Zinc selenide |
| Transmission: | 97% @ 3.39 microns |
| Focal Length: | 150mm (5.9″) |
| Overall Expansion: | 12.5x |
| Overall Length: | 216mm (8.5″) |
| Weight: | 2lbs. |
| Mounting Provisions: | 1/4-20 tapped hole on spatial filter body. |