Positive and negative meniscus lenses
Positive meniscus lenses are convex-concave lenses thicker at the center than at the edge. They are polished and widely used in ophthalmics, where lens power is conventionally specified in diopters. Negative meniscus lenses are convex-concave lenses thinner at the center than at the edge; their other characteristics are described as similar to plano-concave lenses.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Material [Model ULMN100254] | BK7 |
| F [Model ULMN100254] | 100 mm |
| Φ [Model ULMN100254] | 25.4 mm |
| R1 [Model ULMN100254] | 33.72 mm |
| R2 [Model ULMN100254] | 90 mm |
| Tc [Model ULMN100254] | 4 mm |
| Te [Model ULMN100254] | 2.5 mm |
| Fb [Model ULMN100254] | 97.5 mm |
| Material [Model ULMN125254] | BK7 |
| F [Model ULMN125254] | 125 mm |
| Φ [Model ULMN125254] | 25.4 mm |
| R1 [Model ULMN125254] | 38.47 mm |
| R2 [Model ULMN125254] | 90 mm |
| Tc [Model ULMN125254] | 4 mm |
| Te [Model ULMN125254] | 2.8 mm |
| Fb [Model ULMN125254] | 121.8 mm |
| Material [Model ULMN150254] | BK7 |
| F [Model ULMN150254] | 150 mm |
| Φ [Model ULMN150254] | 25.4 mm |
| R1 [Model ULMN150254] | 42.52 mm |
| R2 [Model ULMN150254] | 90 mm |
| Tc [Model ULMN150254] | 4 mm |
| Te [Model ULMN150254] | 3 mm |
| Fb [Model ULMN150254] | 146.3 mm |
| Material [Model ULMN175254] | BK7 |
| F [Model ULMN175254] | 175 mm |
| Φ [Model ULMN175254] | 25.4 mm |
| R1 [Model ULMN175254] | 46.05 mm |
| R2 [Model ULMN175254] | 90 mm |
| Tc [Model ULMN175254] | 4 mm |
| Te [Model ULMN175254] | 3.1 mm |
| Fb [Model ULMN175254] | 171.2 mm |
| Material [Model ULMN200254] | BK7 |
| F [Model ULMN200254] | 200 mm |
| Φ [Model ULMN200254] | 25.4 mm |
| R1 [Model ULMN200254] | 49.03 mm |
| R2 [Model ULMN200254] | 90 mm |
| Tc [Model ULMN200254] | 3.5 mm |
| Te [Model ULMN200254] | 2.8 mm |
| Fb [Model ULMN200254] | 197 mm |
| Material [Model ULMN250254] | BK7 |
| F [Model ULMN250254] | 250 mm |
| Φ [Model ULMN250254] | 25.4 mm |
| R1 [Model ULMN250254] | 83.96 mm |
| R2 [Model ULMN250254] | 235 mm |
| Tc [Model ULMN250254] | 3.5 mm |
| Te [Model ULMN250254] | 2.9 mm |
| Fb [Model ULMN250254] | 246.5 mm |
| Material [Model ULMN300254] | BK7 |
| F [Model ULMN300254] | 300 mm |
| Φ [Model ULMN300254] | 25.4 mm |
| R1 [Model ULMN300254] | 94.08 mm |
| R2 [Model ULMN300254] | 235 mm |
| Tc [Model ULMN300254] | 3.5 mm |
| Te [Model ULMN300254] | 3 mm |
| Fb [Model ULMN300254] | 296.3 mm |
| Material [Model ULMN500254] | BK7 |
| F [Model ULMN500254] | 500 mm |
| Φ [Model ULMN500254] | 25.4 mm |
| R1 [Model ULMN500254] | 123.9 mm |
| R2 [Model ULMN500254] | 235 mm |
| Tc [Model ULMN500254] | 3.5 mm |
| Te [Model ULMN500254] | 3.2 mm |
| Fb [Model ULMN500254] | 495.4 mm |
| Material [Model ULMN100254N] | BK7 |
| F [Model ULMN100254N] | -100 mm |
| Φ [Model ULMN100254N] | 25.4 mm |
| R1 [Model ULMN100254N] | 90 mm |
| R2 [Model ULMN100254N] | 32.59 mm |
| Tc [Model ULMN100254N] | 3 mm |
| Te [Model ULMN100254N] | 4.5 mm |
| Fb [Model ULMN100254N] | -99.2 mm |
| Material [Model ULMN125254N] | BK7 |
| F [Model ULMN125254N] | -125 mm |
| Φ [Model ULMN125254N] | 25.4 mm |
| R1 [Model ULMN125254N] | 90 mm |
| R2 [Model ULMN125254N] | 37.26 mm |
| Tc [Model ULMN125254N] | 3 mm |
| Te [Model ULMN125254N] | 4.2 mm |
| Fb [Model ULMN125254N] | -123.7 mm |
| Material [Model ULMN150254N] | BK7 |
| F [Model ULMN150254N] | -150 mm |
| Φ [Model ULMN150254N] | 25.4 mm |
| R1 [Model ULMN150254N] | 90 mm |
| R2 [Model ULMN150254N] | 41.42 mm |
| Tc [Model ULMN150254N] | 3 mm |
| Te [Model ULMN150254N] | 4 mm |
| Fb [Model ULMN150254N] | -149.5 mm |
| Material [Model ULMN175254N] | BK7 |
| F [Model ULMN175254N] | -175 mm |
| Φ [Model ULMN175254N] | 25.4 mm |
| R1 [Model ULMN175254N] | 90 mm |
| R2 [Model ULMN175254N] | 44.86 mm |
| Tc [Model ULMN175254N] | 3 mm |
| Te [Model ULMN175254N] | 3.8 mm |
| Fb [Model ULMN175254N] | -174.6 mm |
| Material [Model ULMN200254N] | BK7 |
| F [Model ULMN200254N] | -200 mm |
| Φ [Model ULMN200254N] | 25.4 mm |
| R1 [Model ULMN200254N] | 90 mm |
| R2 [Model ULMN200254N] | 47.84 mm |
| Tc [Model ULMN200254N] | 3 mm |
| Te [Model ULMN200254N] | 3.7 mm |
| Fb [Model ULMN200254N] | -199.6 mm |
| Material [Model ULMN300254N] | BK7 |
| F [Model ULMN300254N] | -300 mm |
| Φ [Model ULMN300254N] | 25.4 mm |
| R1 [Model ULMN300254N] | 235 mm |
| R2 [Model ULMN300254N] | 93.13 mm |
| Tc [Model ULMN300254N] | 3 mm |
| Te [Model ULMN300254N] | 3.5 mm |
| Fb [Model ULMN300254N] | -298.3 mm |
| Material [Model ULMN500254N] | BK7 |
| F [Model ULMN500254N] | -500 mm |
| Φ [Model ULMN500254N] | 25.4 mm |
| R1 [Model ULMN500254N] | 235 mm |
| R2 [Model ULMN500254N] | 122.6 mm |
| Tc [Model ULMN500254N] | 3 mm |
| Te [Model ULMN500254N] | 3.3 mm |
| Fb [Model ULMN500254N] | -496.5 mm |
| Material [Model ULMN600254N] | BK7 |
| F [Model ULMN600254N] | -600 mm |
| Φ [Model ULMN600254N] | 25.4 mm |
| R1 [Model ULMN600254N] | 600 mm |
| R2 [Model ULMN600254N] | 204.08 mm |
| Tc [Model ULMN600254N] | 3 mm |
| Te [Model ULMN600254N] | 3.2 mm |
| Fb [Model ULMN600254N] | -596.8 mm |
| Dimension Tolerance [Standard] | ±0.1 mm |
| Dimension Tolerance [High Precision] | ±0.05 mm |
| Center Thickness Tolerance [Standard] | ±0.1 mm |
| Center Thickness Tolerance [High Precision] | ±0.05 mm |
| Surface quality [Standard] | 60/40 |
| Surface quality [High Precision] | 20/10 |
| Surface Figure [Standard；633nm] | λ/2 |
| Surface Figure [High Precision；633nm] | λ/4 |
| Material [General capability; Does not replace individual materials/values in the model table] | Grade A optical glass or Fused Silica |
| Focal Length [General capability; Does not replace individual materials/values in the model table] | ±2% |
| Clear Aperture [General capability; Does not replace individual materials/values in the model table] | >85% |
| Centration [General capability; Does not replace individual materials/values in the model table] | 3 arc minutes |
| Bevel [General capability; Does not replace individual materials/values in the model table] | <0.25mm×45° |
| Coating [General capability; Does not replace individual materials/values in the model table] | Upon requirement |
| Effect of combination with another lens [Meniscus form with a thicker center than edge, described in question 2 in the body text; Not propagated to negative-meniscus PNs] | Shorter focal length and increased system numerical aperture |
Applications
Key Features
Datasheet
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Supplier Information
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