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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
click for more info |
Description |
EFL |
Diameter |
BFL |
Tc |
Te |
Radius |
Volume Price |
|
DVS001
|
Bi-concave lens, standard grade, D=5, EFL=-5
|
-5
|
5
|
-5.62 |
2
|
3.20 |
-5.509
|
$11.10 (MOQ Range Applies) Request Volume Quote |
|
DVS003
|
Bi-concave lens, standard grade, D=6, EFL=-8
|
-8
|
6
|
-8.60 |
2
|
2.90 |
-8.628
|
$11.20 (MOQ Range Applies) Request Volume Quote |
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DVS006-018
|
Bi-concave lens BK7, standard grade, Dia=6, EFL=-18
|
-18
|
6
|
-18.65 |
2
|
2.48 |
-19.009
|
$11.20 (MOQ Range Applies) Request Volume Quote |
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DVS006-027
|
Bi-concave lens BK7, standard grade, Dia=6, EFL=-27
|
-27.5
|
6
|
-28.15 |
2
|
2.31 |
-28.761
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$11.20 (MOQ Range Applies) Request Volume Quote |
|
DVS005
|
Bi-concave lens, standard grade, D=12, EFL=-12
|
-12
|
12
|
-12.60 |
2
|
4.80 |
-12.782
|
$13.10 (MOQ Range Applies) Request Volume Quote |
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DVS023
|
Bi-concave lens, standard grade, D=20, EFL=-70
|
-70
|
20
|
-70.70 |
2
|
3.30 |
-72.961
|
$15.60 (MOQ Range Applies) Request Volume Quote |
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DVS013
|
Bi-concave lens, standard grade, D=20, EFL=-30
|
-30
|
20
|
-30.65 |
2
|
5.26 |
-31.461
|
$15.60 (MOQ Range Applies) Request Volume Quote |
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DVS007
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Bi-concave lens, standard grade, D=20, EFL=-20
|
-20
|
20
|
-20.65 |
2
|
7.04 |
-21.085
|
$15.60 (MOQ Range Applies) Request Volume Quote |
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DVS017
|
Bi-concave lens, standard grade, D=22.4, EFL=-40
|
-40
|
22.4
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-40.70 |
2
|
4.90 |
-41.838
|
$16 (MOQ Range Applies) Request Volume Quote |
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DVS019
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Bi-concave lens, standard grade, D=22.4, EFL=-50
|
-50
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22.4
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-50.65 |
2
|
4.43 |
-52.211
|
$16 (MOQ Range Applies) Request Volume Quote |
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DVS024
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Bi-concave lens, standard grade, D=30, EFL=-100
|
-100
|
30
|
-100.70 |
2
|
4.10 |
-104.091
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$21.60 (MOQ Range Applies) Request Volume Quote |
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DVS018
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Bi-concave lens, standard grade, D=30, EFL=-50
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-50
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30
|
-50.65 |
2
|
6.40 |
-52.211
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$21.60 (MOQ Range Applies) Request Volume Quote |
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DVS015
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Bi-concave lens, standard grade, D=30, EFL=-30
|
-30
|
30
|
-30.65 |
2
|
9.61 |
-31.461
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$21.60 (MOQ Range Applies) Request Volume Quote |
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DVS041
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Bi-concave lens, standard grade, D=42, EFL=-500
|
-500
|
42
|
-500.66 |
2
|
2.85 |
-519.061
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$31.10 (MOQ Range Applies) Request Volume Quote |
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