FIG. 01.01
Lenses · Type 09 / 11
Positive Achromatic Lenses
Two glasses of different dispersion, combined to bring colours to one focus.
- Part
- Positive Achromatic Lens
- Family
- Lenses
- Fig.
- 01.09
- Coating
- In-house
- Quality
- ISO 9001
- Made in
- Roorkee
Description
A positive achromatic lens, or achromat, pairs two glasses with different dispersion, typically a crown and a flint element. Together they bring two wavelengths to a common focus, sharply reducing chromatic aberration (colour fringing) and also lowering spherical aberration. Use it for sharp, colour-true imaging in microscopy, photography and precision optical systems.
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. 01.05
Positive Meniscus Lenses
FIG. 01.06
Negative Meniscus Lenses
FIG. 01.07
Plano-Convex Cylindrical Lenses
FIG. 01.08
Plano-Concave Cylindrical Lenses
FIG. 01.10
Negative Achromatic Lenses
FIG. 01.11
Cylindrical Achromatic Lenses
Quote for positive achromatic lenses.
Tell us the size, material, coating and quantity, or send a drawing. We reply with a quote.