
Material: Calcium Fluoride
Design Wavelength: 587.6nm
Surface Flatness: λ/2
Surface Quality: 60/40
Centration: 3-5 arcmin
Focal Length Tolerance: ±2%

Material: Calcium Fluoride
Design Wavelength: 587.6nm
Surface Flatness: λ/2
Surface Quality: 60/40
Centration: 3-5 arcmin
Focal Length Tolerance: ±2%
| Dia | Focus | Back Focus | R1 | Center Thickness | Edge Thickness | uncoated model | AR@3~5μm model |
| 12.7* | 20 | 16.45 | 8.19 | 5 | 7.4 | JKL55-012-020 | JKL55-012-020-IR1 |
| 12.7* | 50 | 47.87 | 20.48 | 3 | 6 | JKL55-012-050 | JKL55-012-050-IR1 |
| 12.7* | 80 | 78.22 | 32.77 | 2.5 | 6 | JKL55-012-080 | JKL55-012-080-IR1 |
| 25.4* | 50 | 45.74 | 20.48 | 6 | 7.9 | JKL55-025-050 | JKL55-025-050-IR1 |
| 25.4* | 75 | 71.8 | 30.72 | 4.5 | 7 | JKL55-025-075 | JKL55-025-075-IR1 |
| 25.4* | 100 | 97.15 | 40.96 | 4 | 7 | JKL55-025-100 | JKL55-025-100-IR1 |
| 25.4* | 200 | 197.52 | 81.93 | 3.5 | 6.3 | JKL55-025-200 | JKL55-025-200-IR1 |