Plano/Concave & Plano/Convex Lenses
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Plano/Convex-Spherical lenses have a positive focal length and converges the incident light. This type lens forms both real and virtual images. Real image-focused, virtual image-magnified.
Plano/Concave- Spherical lenses have a negative focal length and diverges incident light, this forms a virtual image seen through the lens.
RMI has many standard lenses in stock or lenses can be designed at customer’s requirements.
Both sides can be coated with an RMI high effeciency narrowband, anti-reflective coating or any other coating required by customer's design.
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RMI Standard Specifications
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| Materials: |
BK7, UVFS, FS, CaF2, MgF2, BaF2, Sapphire, Si, ZnSe, Ge, Cleartran, All Glass, All Crystals
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Surface Figure:
BK7, UVFS, FS:
CaF2, MgF2, BaF2:
ZnSe, ZnS, Ge, Si, Cleartran:
Sapphire (2 grades):
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Both Surfaces
λ/10 at 633 nm
λ/4 at 633 nm
λ/40 at 10.6 µm
λ/10, or λ/4 at 633 nm
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Surface Quality:
BK7, UVFS, FS:
CaF2, MgF2, BaF2:
ZnSe, ZnS, Ge, Si, Cleartran:
Sapphire (2 grades):
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Both Surfaces
10-5
20-10
40-20
20-10 or 60-40
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| Diameter Tolerance: |
+ 0.000", – 0.025" |
| Thickness Tolerance: |
± 0.025" |
| Focal Length Tolerance: |
± 0.5% |
| Centration Error: |
< 3 arc minutes |
| Bevels: |
0.010" – 0.030" at 45º |
| Clear Aperture: |
Central 85% of diameter
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