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Double-Concave lenses are most suited to produce diverging light or a virtual
image where the input light is converging.
BK7 Double-Concave Lenses
Specifications:
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Material: |
BK7 grade A optical glass |
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Design Wavelength: |
546.1nm |
|
Design Index: |
1.5183 ± 0.00005 |
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Diameter Tolerance: |
-0.0, -0.15mm |
| Paraxial
Focal Length: |
± 2% |
| Centration: |
< 3 arc
minutes |
| Clear Aperture: |
>85% |
| Surface Figure: |
l/4@632.8nm |
| Surface Quality: |
60-40 scratch and dig |
| Bevel: |
0.25 mm x 45° |
Fused Silica Double-Concave Lenses
Specifications:
|
Material: |
UV graded Fused Silica |
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Design Wavelength: |
546.1nm |
|
Design Index: |
1.46008 ± 0.00005 |
|
Diameter Tolerance: |
-0.0, -0.15mm |
| Paraxial
Focal Length: |
± 2% |
| Centration: |
<3 arc
minutes |
| Clear Aperture: |
>85% |
| Surface Figure: |
l/4@632.8nm |
| Surface Quality: |
60-40 scratch and dig |
| Bevel: |
0.25 mm x 45° |
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