| Specifications: |
| Precision Achromatic Doublet Lenses |
| 1. Material: Optical crown and flint glasses or equivalent |
| 2. Surface Quality: 40/20 |
| 3. Surface Accuracy: ΔN<λ/4@633nm |
| 4. Focal Length Tolerance: ±2% |
| 5. Centration:<3 arc min |
| 6. Clear Aperture: >central 90% of diameter |
| 7. Product Code: LAM+Materia(1+2)-Size-Surface Quality-Surface Accuracy-Centration-Center Wavelength |
