Meniscus Lenses
Meniscus Lenses
| BK7, FS, UVFS, CaF2, ZnSe |
| +0.0, -0.15mm |
| +-3% |
| <<3 arc minutes |
| >90% |
| 0,25mm@45deg |
| λ/[email protected] |
| 40-20 scratch & dig |
| 632.8 nm |
| None. Please refer to the Coating Section |
Meniscus lenses are used in applications to reduce beam distortion. They are used on focusing light beam in telescopes, collimators or condenser systems, optical transceivers or other applications. Altechna provides lens with anti-reflection coating (please refer to the
Coatings section).
Properties (Diameter D, Focal length L)
| D, mm | D, Inches | L Minimal, mm | L Maximal, mm | | 12,7 | 0.5 | +/- 25 | +/- 10.000 | | 25,4 | 1 | +/- 30 | +/- 10.000 | | 38,1 | 1.5 | +/- 50 | +/- 10.000 | | 50,8 | 2 | +/- 80 | +/- 10.000 | | 76,2 | 3 | +/- 100 | +/- 10.000 |
|
| Altechna metrology lab applies following product inspection: |
| Visual inspection – surface quality evaluation according to MIL 13830 and ISO 10110 standards |
| Dimensions – measurement of geometrical dimensions, as diameter, thickness, etc. |
| Radius of Curvature (Spherometer)* |
| Effective Focal Length (Spherometer) |
| Centering (Centration unit) |
| Irregularity (Interferometer) |
| Wavefront distortion (Interferometer) |
*(…) used equipment
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