Aspherical condensing lens can refract illumination light at large divergence angle (convergence angle), and is used in illumination system of high magnification microscope or optical system that needs to concentrate divergent light of light source. A large divergence angle (convergence angle) of about NAO.5 can be obtained by making one of them aspheric with a single lens. It can be used in infrared band from visible light to 2000nm.
|
Model |
Outer diameter
φD(mm) |
focal length
f(mm) |
Edge thickness
Te(mm) |
central thickness
Tc(mm) |
rear focal length
fb(mm) |
Reverse shape |
|
WNNSL2-12-8.5 |
12 |
8.5 |
1.6 |
5.5 |
5.8 |
Spherical surface |
|
WNNSL2-12-10.5 |
12 |
10.5 |
1.1 |
3.5 |
8.2 |
Plane |
|
WNNSL2-18-12 |
18 |
12 |
3.3 |
8.8 |
6.9 |
Spherical surface |
|
WNNSL2-19-17 |
19 |
17 |
1.8 |
7 |
12.4 |
Plane |
|
