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Lens
BK7 Lenses
| Specifications | |
|---|---|
| Material: | BK7 |
| Design Wavelength: | 546.1nm |
| Design Index: | 1.5183 ± 0.0005 |
| Diameter Tolerance: | +0.0, -0.15mm |
| Paraxial Focal Length Tolerance: | ±2% |
| Centration: | 3 arc minutes |
| Clear Aperture: | >85% |
| Surface Figure: | λ/4@632.8nm |
| Surface Quality: | 60/40 scratch/dig |
| Bevel: | 0.25 mm x 45° |
| Coating: | Uncoated |
BK7 Double Concave Lens
| Part No. | f (mm) | dia (mm) | R1=R2 (mm) | t c (mm) | t e (mm) | t b (mm) | Illustration |
|---|---|---|---|---|---|---|---|
| DCV1201 | -25.0 | 12.7 | 26.25 | 2.0 | 3.6 | -25.7 |  |
| DCV1202 | -30.0 | 12.7 | 31.44 | 2.0 | 3.3 | -30.7 | |
| DCV1203 | -40.0 | 12.7 | 41.80 | 2.0 | 3.0 | -40.7 | |
| DCV1204 | -50.0 | 12.7 | 52.17 | 2.0 | 2.8 | -50.7 | |
| DCV1301 | -25.0 | 25.0 | 26.25 | 2.0 | 8.6 | -25.7 | |
| DCV1302 | -35.0 | 25.4 | 36.62 | 2.0 | 6.5 | -35.7 | |
| DCV1303 | -50.0 | 25.4 | 52.17 | 2.0 | 5.1 | -50.7 | |
| DCV1305 | -75.0 | 25.4 | 78.09 | 2.0 | 4.1 | -75.7 | |
| DCV1306 | -100.0 | 25.4 | 104.00 | 2.0 | 3.6 | -100.7 |