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BK-7 Biconcave Lenses |
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These biconcave lenses are used when a very high negative power is
required. They can be used alone to produce a diverging cone of light or in
combination with other lenses. Negative lenses are often quite thick. Sharp edges, which are common
in negative lenses, are removed by beveling to reduce the likelihood of
chipping. BK7 lenses are offered uncoated or with our A55 broadband visible
(425-675nm) AR coating. In addition, a wide range of standard anti-reflection coatings for other wavelengths are available for these lenses. |
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Specifications &
Tolerances
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Focal length: |
±1% |
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Thickness: |
±0.1mm |
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Surface quality: |
20-10 |
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Material: |
BK7 grade A |
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Diameter: |
+0, -0.1mm |
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Centration: |
<1arcmin |
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Aperture: |
>90% |
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Coating: |
Optional broadband AR 400-700nm (for other
wavelengths see coatings section) |
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For
antireflection coatings append appropriate suffix. For other focal lengths or
diameters please call.
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Biconcave Lenses |
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BK-7 Biconcave
Lenses |
UNCOATED |
COATED |
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Diameter, D (mm) |
Focal Length (mm) |
Thickness |
Price |
PRODUCT NUMBER |
Price |
PRODUCT NUMBER |
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Center,tc (mm) |
Edge,te (mm) |
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2.0(LaSFN9) |
-2.0 |
0.70 |
0.85 |
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017-0022 |
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017-0022-A55 |
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3.0(LaSFN9) |
-3.0 |
0.80 |
1.05 |
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017-0023 |
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017-0023-A55 |
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4.0(LaSFN9) |
-4.0 |
0.80 |
1.20 |
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017-0024 |
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017-0024-A55 |
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- |
- |
- |
- |
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- |
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- |
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10.0 |
-9.7 |
2.0 |
4.6 |
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017-0050 |
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017-0050-A55 |
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10.0 |
-14.7 |
2.0 |
3.6 |
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017-0060 |
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017-0060-A55 |
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10.0 |
-19.7 |
2.0 |
3.2 |
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017-0070 |
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017-0070-A55 |
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10.0 |
-24.7 |
2.0 |
3.0 |
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017-0080 |
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017-0080-A55 |
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10.0 |
-29.7 |
2.0 |
2.8 |
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017-0079 |
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017-0079-A55 |
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- |
- |
- |
- |
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- |
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- |
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12.7 |
-9.7 |
2.0 |
6.3 |
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017-0081 |
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017-0081-A55 |
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12.7 |
-14.7 |
2.0 |
4.7 |
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017-0083 |
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017-0083-A55 |
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12.7 |
-19.7 |
2.0 |
4.0 |
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017-0085 |
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017-0085-A55 |
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12.7 |
-24.7 |
2.0 |
3.6 |
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017-0087 |
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017-0087-A55 |
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15.0 |
-14.7 |
2.0 |
5.9 |
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017-0090 |
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017-0090-A55 |
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- |
- |
- |
- |
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- |
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- |
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15.0 |
-19.7 |
2.0 |
4.8 |
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017-0092 |
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017-0092-A55 |
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15.0 |
-29.7 |
2.0 |
3.8 |
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017-0095 |
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017-0095-A55 |
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20.0 |
-19.7 |
2.0 |
7.1 |
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017-0110 |
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017-0110-A55 |
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20.0 |
-24.7 |
2.0 |
6.0 |
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017-0120 |
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017-0120-A55 |
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20.0 |
-29.7 |
2.0 |
5.3 |
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017-0130 |
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017-0130-A55 |
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- |
- |
- |
- |
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- |
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- |
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20.0 |
-39.7 |
2.0 |
4.4 |
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017-0140 |
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017-0140-A55 |
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20.0 |
-49.7 |
2.0 |
3.9 |
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017-0150 |
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017-0150-A55 |
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20.0 |
-69.7 |
2.0 |
3.4 |
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017-0160 |
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017-0160-A55 |
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25.0 |
-24.7 |
2.0 |
8.4 |
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017-0170 |
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017-0170-A55 |
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25.0 |
-29.7 |
2.0 |
7.2 |
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017-0172 |
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017-0172-A55 |
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- |
- |
- |
- |
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- |
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- |
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25.0 |
-34.7 |
2.0 |
6.4 |
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017-0174 |
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017-0174-A55 |
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25.0 |
-39.7 |
2.0 |
5.9 |
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017-0176 |
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017-0176-A55 |
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25.0 |
-49.7 |
2.0 |
5.1 |
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017-0180 |
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017-0180-A55 |
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25.0 |
-59.7 |
2.0 |
4.5 |
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017-0182 |
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017-0182-A55 |
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25.0 |
-79.7 |
2.0 |
3.9 |
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017-0190 |
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017-0190-A55 |
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- |
- |
- |
- |
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- |
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- |
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25.4 |
-24.7 |
2.0 |
8.6 |
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017-0250 |
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017-0250-A55 |
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25.4 |
-31.2 |
2.0 |
7.1 |
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017-0254 |
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017-0254-A55 |
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25.4 |
-41.0 |
2.0 |
5.8 |
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017-0258 |
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017-0258-A55 |
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25.4 |
-49.7 |
2.0 |
5.2 |
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017-0260 |
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017-0260-A55 |
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25.4 |
-60.8 |
2.0 |
4.6 |
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017-0264 |
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017-0264-A55 |
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- |
- |
- |
- |
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- |
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- |
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25.4 |
-70.7 |
2.0 |
4.2 |
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017-0266 |
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017-0266-A55 |
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25.4 |
-79.7 |
2.0 |
4.0 |
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017-0270 |
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017-0270-A55 |
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25.4 |
-89.7 |
2.0 |
3.7 |
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017-0275 |
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017-02750A55 |
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25.4 |
-99.7 |
2.0 |
3.6 |
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017-0280 |
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017-0280-A55 |
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25.4 |
-149.7 |
2.0 |
3.0 |
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017-0290 |
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017-0290-A55 |
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- |
- |
- |
- |
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- |
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- |
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25.4 |
-199.7 |
2.0 |
2.8 |
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017-0300 |
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017-0300-A55 |
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30.0 |
-29.7 |
2.0 |
9.7 |
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017-0340 |
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017-0340-A55 |
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30.0 |
-49.7 |
2.0 |
6.4 |
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017-0350 |
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017-0350-A55 |
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30.0 |
-79.7 |
2.0 |
4.7 |
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017-0360 |
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017-0360-A55 |
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30.0 |
-99.7 |
2.0 |
4.2 |
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017-0370 |
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017-0370-A55 |
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- |
- |
- |
- |
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- |
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- |
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30.0 |
-149.7 |
2.0 |
3.4 |
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017-0380 |
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017-0380-A55 |
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30.0 |
-199.7 |
2.0 |
3.1 |
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017-0390 |
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017-0390-A55 |
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50.8 |
-49.7 |
3.0 |
16.3 |
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017-0420 |
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017-0420-A55 |
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50.8 |
-59.7 |
3.0 |
13.8 |
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017-0425 |
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017-0425-A55 |
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50.8 |
-69.7 |
3.0 |
12.2 |
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017-0430 |
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017-0430-A55 |
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- |
- |
- |
- |
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- |
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- |
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50.8 |
-79.7 |
3.0 |
11.0 |
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017-0440 |
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017-0440-A55 |
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50.8 |
-89.7 |
3.0 |
10.0 |
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017-0445 |
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017-0445-A55 |
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50.8 |
-99.7 |
3.0 |
9.3 |
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017-0450 |
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017-0450-A55 |
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50.8 |
-149.7 |
3.0 |
7.2 |
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017-0460 |
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017-0460-A55 |
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50.8 |
-199.7 |
3.0 |
6.1 |
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017-0470 |
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017-0470-A55 |
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- |
- |
- |
- |
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- |
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- |
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50.8 |
-249.7 |
3.0 |
5.5 |
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017-0480 |
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017-0480-A55 |
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50.8 |
-299.7 |
3.0 |
6.1 |
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017-0490 |
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017-0490-A55 |
These biconcave lenses are suited to a wide variety of general
applications including diverging a collimated laser beam, spreading a beam for detector
coverage, and forming virtual images. The sizes listed are standard and we keep
most configurations in stock at all times for immediate delivery. If you don't
see exactly the biconvex lens that you need, please ask.
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Merci de contacter Infos Photon Lines pour tout renseignement complémentaire. |
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