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Meniscus lenses allow minimal spherical aberrations when a parallel beam enters the convex surface. This results in a minimum focal spot size for the incoming collimated light source. All meniscus lenses shown have positive focal lengths. Negative focal lengths are available upon request.
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All series LM lenses are coated and optimized for use at 10.6 microns.
| Specifications: | Meniscus Lenses | | Diameter Tolerance: | + 0.000" / - 0.005" | | Thickness Tolerance: | +/- 0.010" | | Centering Tolerance: | 3 Arc Minutes Maximum | | Sphericity: | < 1/40th wave at 10.6 microns | | Surface Quality: | 40-20 Scratch-Dig | | Focal Length Tolerance: | +/- 0.5 % | | Absorption: | 0.25 % total | | AR Coating Reflectivity: | R < 0.5 % at 10.6 microns |
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