Meniscus lens is a lens that has two curved spherical surfaces, one convex and the other concave. Around the middle, the meniscus lens is thicker than at the sides. Thus, with a rising beam waist and spherical aberration, the lens has a smaller beam diameter.
When a meniscus lens is paired with another lens it shortens the focal length and increases the system’s numerical aperture. This decreases the distortion of the image and increases the resolution of the image.
Meniscus Lenses
Meniscus Lenses Catalogue
Meniscus Lenses Catalogue
| Part Number | ϕ(mm) | f(mm) | Fb(mm) | R1 | R2 | Tc(mm) | Te(mm) | Material |
| LEN4220-32R3-72LAK50A | 22 | 32.325 | 18.551 | -127.945 | 7.158 | H-LAK50A | ||
| LEN4254-100-40 | 25.4 | 100 | 97.5 | 33.72 | 90 | 4 | 2.5 | |
| LEN4254-125-40 | 25.4 | 125 | 121.8 | 38.47 | 90 | 4 | 2.8 | |
| LEN4254-150-40 | 25.4 | 150 | 146.3 | 42.52 | 90 | 4 | 3 | |
| LEN4254-175-40 | 25.4 | 175 | 171.2 | 46.05 | 90 | 4 | 3.1 | |
| LEN4254-200-35 | 25.4 | 200 | 197 | 49.03 | 90 | 3.5 | 2.8 | |
| LEN4254-250-35 | 25.4 | 250 | 296.3 | 83.96 | 235 | 3.5 | 3 | |
| LEN4254-300-35 | 25.4 | 300 | 296.3 | 94.08 | 235 | 3.5 | 3 | |
| LEN4254-400-35 | 25.4 | 400 | 395.8 | 110.72 | 235 | 3.5 | 3.1 | |
| LEN4254-500-35 | 25.4 | 500 | 495.4 | 123.9 | 235 | 3.5 | 3.2 | |
| LEN4254-800-35 | 25.4 | 800 | 794.5 | 145.39 | 600 | 3.5 | 3.3 | |
| LEN4254-1500-35 | 25.4 | 1500 | 1492 | 339.05 | 600 | 3.5 | 3.4 | |
| LEN4254-2000-35 | 25.4 | 2000 | 1990.2 | 380.54 | 600 | 3.5 | 3.4 | |
| LEN4254-4000-35 | 25.4 | 4000 | 3984.5 | 466.12 | 600 | 3.5 | 3.5 | |
| LEN4254-M-100-30 | 25.4 | -100 | -99.2 | 90 | 32.59 | 3 | 4.5 | |
| LEN4254-M-125-30 | 25.4 | -125 | -123.7 | 90 | 37.26 | 3 | 4.2 | |
| LEN4254-M-150-30 | 25.4 | -150 | -149.5 | 90 | 41.42 | 3 | 4 | |
| LEN4254-M-175-30 | 25.4 | -175 | -174.6 | 90 | 44.86 | 3 | 3.8 |
Specifications
Product Details
- Material: BK7 or other optical glass, Fused Silica, ZnSe, CaF2
- Diameter Tolerance: +0/-0.15mm
- Paraxial Focal Length Tolerance: ±2%
- Centration: 3 arc minutes
- Surface Quality: 60-40 scratch and dig
- Clear Aperture: >85%
- Surface Figure: λ/4@632.8nm
- Chamfer: <0.25 mm x 45°
- Coating: Customer Specified
Applications
1. Meniscus lens Used often for Beam Focusing
2. Meniscus lens also Diminishes the Increase in Spherical Aberrations for Multi-Element Systems
