Both sides are concave, which can effectively refract light in a narrow space. Used to focus collimated light in the shortest possible distance, or to focus as much light as possible from a point source.
|
Model |
Outer diameter
φD(mm) |
focal length
f(mm) |
Edge thickness
Te(mm) |
central thickness
Tc(mm) |
rear focal length
fb(mm) |
radius of curvature
r(mm) |
|
WNSL4K9-6-6 |
6 |
-6 |
3 |
1.5 |
-6.7 |
6.75 |
|
WNSL4K9-10-10 |
10 |
-10 |
4.6 |
2 |
-10.3 |
10.38 |
|
WNSL4K9-10-15 |
10 |
-15 |
3.6 |
2.0.. |
-15.3 |
15.57 |
|
WNSL4K9-10-20 |
10 |
-20 |
3.2 |
2 |
-20.3 |
20.76 |
|
WNSL4K9-12.7-15 |
12.7 |
-15 |
4.7 |
2 |
-15.4 |
15.57 |
|
WNSL4K9-12.7-25 |
12.7 |
-25 |
3.6 |
2 |
-25.4 |
59.95 |
|
WNSL4K9-15-15 |
15 |
-15 |
5.9 |
2 |
-15.3 |
15.57 |
|
WNSL4K9-15-20 |
15 |
-20 |
4.8 |
2 |
-20.3 |
20.76 |
|
WNSL4K9-15-50 |
15 |
-50 |
3.1 |
2 |
-50.3 |
51.9 |
|
