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Bi-concave glass lenses are manufactured with both surfaces concave. These
lenses have negative focal lengths.
- These lenses diverge collimated incident light and form virtual images,
which are seen through the lens.
- They are often used to expand light or increase focal lengths in existing
systems.
- They are used in laser beam expanders, optical character readers, viewers,
and projection systems.
- Antireflection coatings can be ordered as an
option.
- We will provide precision grade bi-concave lenses
with tighter manufacturing tolerances.
- Minimum Order Quantity (MOQ) ranging from 100 to 1,000 units.
General Specifications:
Parameter |
Value |
Default unit |
mm |
Material |
BK7 |
Diameter tolerance |
+0, -0.1mm |
Focal length tolerance |
+/-2% |
Center thickness tolerance |
+/-0.2mm |
Centration |
3 arc min |
Surface quality |
60-40 |
Flange width |
0.2-0.4mm |
PN: |
DVS018
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Description: |
Bi-concave lens, standard grade, D=30, EFL=-50
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Material: |
BK7
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EFL: |
-50
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Diameter: |
30
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Index: |
1.51872
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BFL: |
-50.65
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Tc: |
2
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Te: |
6.40
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Radius1: |
-52.211
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Radius2: |
52.2113309786882
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Volume Price: |
$21.60 (MOQ Range Applies) Request Volume Quote |
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