T-LB5864-E - Ø1/2" CaF2 Bi-Convex Lens, f = 40.0 mm, AR-Coated: 2 - 5 µm
T-LB5864-E - Ø1/2" CaF2 Bi-Convex Lens, f = 40.0 mm, AR-Coated: 2 - 5 µm
Features
- Vacuum-Grade Calcium Fluoride Substrate
- Ø1/2" and Ø1" Versions Available
- Broadband AR Coating for the 2 - 5 μm Range
- Focal Lengths from 15.0 mm to 200.0 mm
-
Diameter 1/2" (12.7 mm)
- Focal Length 40.0 mm
- Diopter +25.0
- Radius of Curvature 34.2 mm
- Center Thickness 3.2 mm
- Edge Thickness 2.0 mm
- Back Focal Length 38.9 mm
- Reference Drawing
| AR Coating Range | 2 - 5 μm |
| Reflectance over Coating Range (Avg.) | <1.25% |
| Diameter Tolerance | +0.00/-0.10 mm |
| Thickness Tolerance | ±0.1 mm |
| Focal Length Tolerance | ±1% |
| Surface Quality | 40-20 (Scratch-Dig) |
| Spherical Surface Powerb | 3λ/2 |
| Spherical Surface Irregularity (Peak to Valley) |
λ/2 |
| Centration | <3 arcmin |
| Clear Aperture | >90% of Diameter |
| Design Wavelength | 588 nm |