English 
Chinese 
Material: Calcium Fluoride
Design Wavelength: 587.6nm
Surface Flatness: λ/2
Surface Quality: 60/40
Centration: ≤3 arcmin
Focal Length Tolerance: ±1%
CATEGORY
CaF2 Best Form Lenses
Model: JKLM5
| Dia | Focus | Back Focus | R1 | R2 | Center thickness | Edge Thickness | Refractive | uncoated model | AR @3~5μm model |
| 12.7 | 20 | 16.3 | 7.5 | 72.4 | 4.7 | 1.4 | 50 | JKLM5-012B-020 | JKLM5-012B-020-IR1 |
| 12.7 | 50 | 47.1 | 15 | 52.8 | 3 | 2 | 20 | JKLM5-012B-050 | JKLM5-012B-050-IR1 |
| 12.7 | 80 | 76.5 | 20 | 49.1 | 3 | 2.4 | 12.5 | JKLM5-012B-080 | JKLM5-012B-080-IR1 |
| 25.4 | 40 | 33.1 | 15 | 146.9 | 8.9 | 2.4 | 25 | JKLM5-025B-040 | JKLM5-025B-040-IR1 |
| 25.4 | 50 | 43.3 | 15.5 | 55.2 | 7.1 | 2 | 20 | JKLM5-025B-050 | JKLM5-025B-050-IR1 |
| 25.4 | 75 | 67.2 | 15.5 | 28 | 5.6 | 2 | 13.3 | JKLM5-025B-075 | JKLM5-025B-075-IR1 |
| 25.4 | 100 | 94.2 | 20 | 36.8 | 4 | 1.7 | 10 | JKLM5-025B-100 | JKLM5-025B-100-IR1 |
| 25.4 | 150 | 145 | 35 | 78.6 | 4 | 2.7 | 6.7 | JKLM5-025B-150 | JKLM5-025B-150-IR1 |
| 25.4 | 200 | 194.2 | 40 | 75.9 | 4 | 3 | 5 | JKLM5-025B-200 | JKLM5-025B-200-IR1 |
| 25.4 | 500 | 495.4 | 125 | 317.8 | 4 | 3.6 | 2 | JKLM5-025B-500 | JKLM5-025B-500-IR1 |
