FIG. 01.01
Lenses · Type 05 / 11
Positive Meniscus Lenses
Convex-concave and thicker at the centre: adds focusing power with little aberration.
- Part
- Positive Meniscus Lens
- Family
- Lenses
- Fig.
- 01.05
- Coating
- In-house
- Quality
- ISO 9001
- Made in
- Roorkee
Description
A positive meniscus lens has one convex and one concave surface and is thicker at the centre than at the edge. It converges light. Added to another lens, it shortens the focal length and raises the numerical aperture while adding little spherical aberration. Uses include photography, astronomy and laser optics.
Specify yours.
Start from a catalogue part or from your own drawing, in the material, coating and tolerance grade you need.
AMaterial
- Optical glass (BK7-class crown, flint)
- Fused silica / fused quartz
- Sapphire
- CaF₂
- BaF₂
- MgF₂
- Silicon (Si)
- Germanium (Ge)
- Zinc sulphide (ZnS)
- Zinc selenide (ZnSe)
- Nd:YAG crystal
- Other UV and IR materials
BCoatingIn-house
- ARAnti-reflection
- Al · AgMetallic mirror
- HRDielectric mirror
- Filter
- Beam-splitter
- Polarizing
CTolerance grade
| Parameter | Commercial | Precision |
|---|---|---|
| Thickness | ±0.1 mm | ±0.01 mm |
| Radius | 1% | 0.5% |
| Refractive index | 0.001 | 0.0001 |
| Abbe (V-number) | 1% | 0.1% |
| Centration | 3 arc-min | 30 arc-sec |
| Tilt / wedge | 1 arc-min | 10 arc-sec |
| Surface irregularity | 1 fringe | λ/4 (0.25 fringe) |
| Surface quality (scratch-dig) | 60-40 | 10-5 |
DMade to your drawing
Send your drawing.
A drawing or a short spec is enough. We quote to it.
- Dimensions and tolerances
- Material and coating
- Surface quality
- Quantity
More lenses.
FIG. 01.02
Double-Convex Lenses
FIG. 01.03
Plano-Concave Lenses
FIG. 01.04
Double-Concave Lenses
FIG. 01.06
Negative Meniscus Lenses
FIG. 01.07
Plano-Convex Cylindrical Lenses
FIG. 01.08
Plano-Concave Cylindrical Lenses
FIG. 01.09
Positive Achromatic Lenses
FIG. 01.10
Negative Achromatic Lenses
FIG. 01.11
Cylindrical Achromatic Lenses
Quote for positive meniscus lenses.
Tell us the size, material, coating and quantity, or send a drawing. We reply with a quote.