Meniscus Lenses
Meniscus Lenses are manufactured with one convex surface and another concave surface. It can be a convergent lens or a divergent lens, which is decided together by refractive index, curvature and radius.
| Specifications | |||
|---|---|---|---|
| Material | BK7 Grade A Optical Glass |
|
|
| Dimension Tolerance | +0.0, -0.05mm | ||
| Clear Aperture | >85% | ||
| Flatness | λ/4@632.8nm | ||
| Surface Quality | 60-40 | ||
| Centration | 3 arc min | ||
| Design Wavelength | 546.1nm | ||
| Design Index | 1.5183+/-0.0005 | ||
| Paraxial Focal Length Tolerance | +/-2% | ||
| Bevel | 0.25mm x 45° | ||
| Coating | Uncoated | ||
Positive Meniscus Lens
| Part No | Φ(mm) | f (mm) | R1(mm) | R2(mm) | tc (mm) | te (mm) | fb (mm) |
|---|---|---|---|---|---|---|---|
| MLP100254 | 25.4 | 100.0 | 33.72 | 90.0 | 4.0 | 2.5 | 97.5 |
| MLP125254 | 25.4 | 125.0 | 38.47 | 90.0 | 4.0 | 2.8 | 121.8 |
| MLP150254 | 25.4 | 150.0 | 42.52 | 90.0 | 4.0 | 3.0 | 146.3 |
| MLP175254 | 25.4 | 175.0 | 46.05 | 90.0 | 4.0 | 3.1 | 171.2 |
| MLP200254 | 25.4 | 200.0 | 49.03 | 90.0 | 3.5 | 2.8 | 197.0 |
| MLP250254 | 25.4 | 250.0 | 83.96 | 235.0 | 3.5 | 2.9 | 246.5 |
| MLP300254 | 25.4 | 300.0 | 94.08 | 235.0 | 3.5 | 3.0 | 296.3 |
| MLP500254 | 25.4 | 500.0 | 123.9 | 235.0 | 3.5 | 3.2 | 495.4 |
Negative Meniscus Lens
| Part No | Φ(mm) | f (mm) | R1(mm) | R2(mm) | tc (mm) | te (mm) | fb (mm) |
|---|---|---|---|---|---|---|---|
| MLN100254 | 25.4 | -100.0 | 90.0 | 32.59 | 3.0 | 4.5 | -99.2 |
| MLN125254 | 25.4 | -125.0 | 90.0 | 37.26 | 3.0 | 4.2 | -123.7 |
| MLN150254 | 25.4 | -150.0 | 90.0 | 41.42 | 3.0 | 4.0 | -149.5 |
| MLN175254 | 25.4 | -175.0 | 90.0 | 44.86 | 3.0 | 3.8 | -174.6 |
| MLN200254 | 25.4 | -200.0 | 90.0 | 47.84 | 3.0 | 3.7 | -199.6 |
| MLN300254 | 25.4 | -300.0 | 235.0 | 93.13 | 3.0 | 3.5 | -298.3 |
| MLN500254 | 25.4 | -500.0 | 235.0 | 122.6 | 3.0 | 3.3 | -496.5 |
| MLN600254 | 25.4 | -600.0 | 600.0 | 204.08 | 3.0 | 3.2 | -596.8 |
Note: Other sizes, material and coatings are available upon request.
