Products
Spherical Lenses
BK7 Bi-concave Spherical Lenses
Material:BK7
Design Wavelength:632.8nm
Focal Length Tolerance:±1%
Diameter Tolerance:+0.0/-0.1mm
Thickness Tolerance:±0.1mm
Surface Accuracy:λ/4@632.8nm
Surface Quality:40-20
Centration:<3'
Clear Aperture:>90%
Bevelling:<0.2×45°
A:350-650nm
B:650-1050nm
C:1050-1580nm
A:350-650nm
B:650-1050nm
C:1050-1580nm
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BK7 Bi-concave Spherical Lenses
| NO. | EFL(mm) | Dia(mm) | R1=R2(mm) | Tc(mm) | Te(mm) | BFL(mm) |
| 11D1569R | -25.00 | 12.70 | -26.17 | 2.50 | 4.10 | -25.81 |
| 11D1903R | -30.00 | 12.70 | -31.41 | 3.00 | 4.30 | -30.97 |
| 11D1357R | -50.00 | 12.70 | -52.10 | 3.50 | 4.30 | -51.15 |
| 11D1464R | -50.00 | 25.40 | -52.01 | 3.00 | 6.10 | -50.98 |
| 11D1170R | -75.00 | 25.40 | -77.86 | 3.50 | 5.60 | -76.15 |
| 11D1613R | -100.00 | 25.40 | -103.69 | 4.00 | 5.60 | -101.31 |
