Meniscus lenses have one surface convex and the other surface concave. They are used to change the focal length of another lens. Meniscus lenses can be used with another lens to produce longer or shorter focal lengths.
Specifications:
Material: | BK7 or UV fused silica |
Focal Length Tolerance: | ±1% @589nm |
Design Wavelength: | 589nm |
Centration: | ≤3′ |
Diameter Tolerance: | +0/-0.1mm |
Clear Aperture: | ＞≥ central 90% of diameter |
Center Thickness Tolerance: | ±0.1mm |
Edge Thickness: | 3.5 mm , nominal |
Surface Quality: | 20/10（UVFS）/ 40/20（BK7） |
Surface Accuracy: | ≤ 1.5λ power，λ/2 irregularity（UVFS） ≤ 1.5λ power，λ/4 irregularity（BK7） |
Chamfers: | 0-0.8mm face width×45°±15° |
Notes:
1. Material, besides BK7, fused silica and any other materials are available.
2. Surface Quality could reach 40-20 or 20-10
3. Centration such as 1’, 30” is available.
4. Please show us the size and the coating specification.
Part No. | DIA(mm) | F(mm) | Tc(mm) | MARERIALS |
INF-PML-25-100 | 25.4 | 100.0 | 3.6 | BK7 |
INF-PML-25-125 | 25.4 | 125.0 | 3.3 | BK7 |
INF-PML-25-150 | 25.4 | 150.0 | 3.1 | BK7 |
INF-PML-25-200 | 25.4 | 200.0 | 2.8 | BK7 |
INF-PML-25-250 | 25.4 | 250.0 | 2.6 | BK7 |
INF-PML-25-300 | 25.4 | 300.0 | 2.5 | BK7 |
INF-PML-25-400 | 25.4 | 400.0 | 2.4 | BK7 |
INF-PML-25-500 | 25.4 | 500.0 | 2.3 | BK7 |
INF-PML-50-100 | 50.8 | 100.0 | 9.7 | BK7 |
INF-PML-50-125 | 50.8 | 125.0 | 8.2 | BK7 |
INF-PML-50-150 | 50.8 | 150.0 | 7.3 | BK7 |
INF-PML-50-200 | 50.8 | 200.0 | 6.2 | BK7 |
INF-PML-50-250 | 50.8 | 250.0 | 5.5 | BK7 |
INF-PML-50-300 | 50.8 | 300.0 | 5.1 | BK7 |
INF-PML-50-400 | 50.8 | 400.0 | 5.0 | BK7 |
INF-PML-50-500 | 50.8 | 500.0 | 5.0 | BK7 |
INF-PML-50-1000 | 50.8 | 1000.0 | 5.0 | BK7 |
Custom designs for other sizes and coatings are also available upon request
