Description
Positive
meniscus lenses is convex-concave lens thicker at the center than at the edges,
which frequently used for beam focusing applications.
Negative
meniscus lenses is convex-concave lens thinner at the center than edges,
which frequently used for beam expanding applications.
Optical Meniscus Lens Specification:
|
Material: |
Fused Silica or other optical glass |
|
Dimension Tolerance: |
±0.1mm(Standard), ±0.05mm(High Precision) |
|
Center Thickness Tolerance: |
±0.1mm(Standard), ±0.05mm(High Precision) |
|
Paraxial Focal Length: |
±2% |
|
Surface quality: |
60/40(Standard), 20/10(High Precision) |
|
Clear Aperture: |
>85% |
|
Surface Figure: |
λ/2(Standard), λ/4(High Precision) @633nm |
|
Centration: |
3 arc minutes |
|
Bevel: |
<0.25mm×45° |
|
Coating: |
Upon requirement |
