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Optics
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Bi-Concave lenses
Bi-concave is a divergent lens with two inward curved surfaces, It’s
used to produce divergent light of virtual image where input beam
is converged.
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BK7/UV
Fused silica Bi-Concave Lenses
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Specifications |
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Material |
BK7 |
UV Fused silica |
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Diameter tolerance |
±0.1mm |
±0.1mm |
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Design wavelength |
546.1nm,
n=1.5187 |
546.1nm,
n=1.46008 |
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Focal tolerance |
±2% |
±2% |
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Centration |
3
arcmin |
3
arcmin |
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Surface quality |
60-40 S/D |
60-40 S/D |
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Surface flatness |
l/4@632.8nm |
l/4@632.8nm |
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Clear aperture |
>90% |
>90% |
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Bevel |
Protective bevel |
Protective bevel |
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Item# |
Material |
f(mm) |
F(mm) |
R(mm) |
Tc(mm) |
Te(mm) |
Fb(mm) |
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LB11-12-25 |
BK7 |
12.7 |
-25.0 |
26.30 |
2.0 |
3.56 |
-25.68 |
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LB11-12-30 |
BK7 |
12.7 |
-30.0 |
31.48 |
2.0 |
3.29 |
-30.67 |
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LB11-12-40 |
BK7 |
12.7 |
-40.0 |
41.88 |
2.0 |
2.97 |
-40.70 |
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LB11-12-50 |
BK7 |
12.7 |
-50.0 |
52.24 |
2.0 |
2.78 |
-50.68 |
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LB11-25-35 |
BK7 |
25.4 |
-35.0 |
36.62 |
2.0 |
6.5 |
-35.7 |
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LB11-25-50 |
BK7 |
25.4 |
-50.0 |
52.17 |
2.0 |
5.1 |
-50.7 |
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LB11-25-75 |
BK7 |
25.4 |
-75.0 |
78.09 |
2.0 |
4.1 |
-75.7 |
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LB11-25-100 |
BK7 |
25.4 |
-100.0 |
104.00 |
2.0 |
3.6 |
-100.7 |
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LB11-25-200 |
BK7 |
25.4 |
-200.0 |
207.66 |
2.0 |
2.8 |
-200.7 |
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LB11-25-250 |
BK7 |
25.4 |
-250.0 |
259.49 |
2.0 |
2.6 |
-250.7 |
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LB11-25-300 |
BK7 |
25.4 |
-300.0 |
518.64 |
2.0 |
2.5 |
-300.7 |
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LB11-25-500 |
BK7 |
25.4 |
-500.0 |
259.49 |
2.0 |
2.3 |
-500.7 |
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LB11-25-1K |
BK7 |
25.4 |
-1000.0 |
518.64 |
2.0 |
2.2 |
-1000.7 |
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LB11-38-100 |
BK7 |
38.0 |
-100.0 |
104.17 |
3.0 |
6.5 |
-100.7 |
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LB12-12-25 |
Fused silica |
12.7 |
-25.0 |
23.32 |
2.0 |
3.7 |
-25.7 |
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LB12-12-30 |
Fused silica |
12.7 |
-30.0 |
27.92 |
2.0 |
3.5 |
-30.7 |
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LB12-12-40 |
Fused silica |
12.7 |
-40.0 |
37.12 |
2.0 |
3.1 |
-40.7 |
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LB12-25-50 |
Fused silica |
25.4 |
-50.0 |
46.32 |
2.0 |
5.6 |
-50.7 |
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LB12-25-75 |
Fused silica |
25.4 |
-75.0 |
69.33 |
2.0 |
4.3 |
-75.7 |
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LB12-25-100 |
Fused silica |
25.4 |
-100.0 |
92.33 |
2.0 |
3.8 |
-100.7 |
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LB12-25-150 |
Fused silica |
25.4 |
-150 |
138.34 |
2.0 |
3.2 |
-150.7 |
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LB12-25- | | |
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