The Precision People
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AL14-BK7 Double-Concave Lenses
| Material: | BK7 grade A optical glass |  |
| Design Wavelength: | 587.6nm | |
| Diameter Tolerance: | +0.0/-0.1mm | |
| Center Thickness Tolerance: | +0.2mm | |
| Surface Figure: | λ/4 @632.8nm | |
| Focal Length Tolerance: | +2% | |
| Centering Tolerance: | 3 arc minutes | |
| Surface Quality: | 60-40 scratch-dig | |
| Bevel: | 0.2mmX45o | |
| Coatings: | without coating |
| (mm) | ||||||
| Catalog No. | Dia. | EFL | BFL | R1=-R2 | Tc | Te |
| AL14-002-002 | 2.0 | -2.0 | -2.307 | -2.224 | 1.0 | 1.48 |
| AL14-002-003 | 2.0 | -2.5 | -2.810 | -2.742 | 1.0 | 1.38 |
| AL14-003-003 | 3.0 | -3.0 | -3.313 | -3.26 | 1.0 | 1.73 |
| AL14-003-006 | 3.0 | -6.3 | -6.621 | -6.672 | 1.0 | 1.34 |
| AL14-003-010 | 3.0 | -10.0 | -10.32 | -10.495 | 1.0 | 1.22 |
| AL14-004-004 | 4.0 | -4.0 | -4.317 | -4.295 | 1.0 | 1.99 |
| AL14-006-006 | 6.3 | -6.3 | -6.776 | -6.752 | 1.5 | 3.06 |
| AL14-010-010 | 10.0 | -10.0 | -10.480 | -10.577 | 1.5 | 4.01 |
| AL14-012-012 | 12.5 | -12.5 | -12.480 | -12.643 | 1.5 | 4.81 |
| AL14-016-016 | 16.0 | -16.0 | -16.49 | -16.775 | 1.5 | 5.56 |
| AL14-025-025 | 25.0 | -25.0 | -25.66 | -26.16 | 2.0 | 8.36 |
| AL14-040-040 | 40.0 | -40.0 | -40.82 | -41.74 | 2.5 | 12.71 |
| AL14-050-050 | 50.0 | -50.0 | -50.99 | -52.15 | 3.0 | 15.77 |