
Steinheil Triplets
The Steinheil triplets are made of a low index crown element cemented in between two identical meniscus flint elements. Specially designed for 1:1 conjugation, they perform well for conjugate ratios up to 5.
These lenses make good relay optics for both on- and off-axis application and are often used as eyepieces.
| Diameter |
Dia. Tolerance |
CT Tolerance |
Centering |
Irregularity |
Surface Quality |
Bevel |
| 6.00-25.00 |
+0.00 / -0.10 |
±0.2 |
3-5 minutes |
0.5 Waves |
60-40 |
0.25 x 45° |
| Dimensions |
MM |
| Clear Aperture |
CA >= 90% of Diameter |
| Coating |
1/4wave MgF2 @ 550nm (See Coating Chart for Available Options) |
| Design Wavelength |
587.6nm |
| Focal Length Tolerance |
±2% |
| Edge Thickness |
Reference |
| * All dimensions are in mm |
|