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DOUBLE CONCAVE LENSES (DCV) |
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Double Concave lenses (DCV) have two inward curved
sides and negative focal length. They are used for image reduce and to
spread light. All dimensions are in mm.
NOTES:
- Negative outer surface should have the following annulus:
annulus=(diameter - clear aperture)/2 - bevel.
- Clear Aperture Specification:
3.00 diameter CA=(diameter) - 0.50mm
3.01-12.50 diameter CA=(diameter) = 1.00mm
12.51-75.00 diameter CA=(diameter) - 1.50m
- Coating: 1/4 Wave MgF2 @ 550nm
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Diameter |
Scratch/Dig |
Diameter Tolerance |
Center Thickness Tolerance |
Centering Tolerance |
Bevel
(Note 1.) |
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1.00-3.00 |
60/40 |
+0.0/-0.05 |
+/-0.1 |
3-5 arc min |
0.1x45 deg |
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3.01-5.00 |
60/40 |
+0.0/-0.05 |
+/-0.1 |
3-5 arc min |
0.1x45 deg |
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5.01-40.0 |
60/40 |
+0.0/-0.10 |
+/-0.1 |
3-5 arc min |
0.1x45 deg |
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§¶(mm) |
f(mm) |
fb(mm) |
tc(mm) |
te(mm) |
R(mm) |
Material |
Stock Number |
Price-Uncoated |
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6.0 |
-6.0 |
-6.41 |
1.50 |
2.15 |
-9.74 |
SF11 |
B-00A-300 |
$1.65 |
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12.0 |
-12.0 |
-12.81 |
3.00 |
4.59 |
-19.47 |
SF11 |
B-00A-301 |
$2.55 |
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20.0 |
-20.0 |
-20.55 |
2.00 |
4.75 |
-31.82 |
SF11 |
B-00A-302 |
$5.6 |
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25.0 |
-50.0 |
-50.82 |
2.50 |
5.18 |
-52.10 |
BK7 |
B-00A-005 |
$6.2 |
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| (All specifications are subject to chance without notice. We reserve the right to correct misprints.) |
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