Double-Concave lenses are most suited to produce diverging light or a virtual
image where the input light is converging. Read
more about Double Concave Lens
at PhotonicsKnowledge.com.
BK7 Double-Concave Lenses
Main Specifications
|
|
Material |
BK7 grade A optical glass |
Design Wavelength |
546.1nm |
Design Index |
1.5183 � 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� |
|
Fused Silica Double-Concave Lenses
Main Specifications
|
|
Material |
UV graded Fused Silica |
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� |
|
|