Lenses
Lenses are widely used at YAG-laser apparatuses for welding, cutting, drilling, and marking as well as in based on YAG-laser other applications like collimators, magnifiers, radiometers, optical transceivers, and condensers.
Tydex offers plano-convex, plano-concave, bi-convex, bi-concave, and meniscus lenses of spherical design. Cylindrical and custom-made lenses are also available.
Specification:
Substrate material:
KU-1, K8
Surface figure (irregularity) @ 633nm:
l/10
Surface quality, scr/dig:
20/10
Clear aperture:
exceeds central 85% of dimension
Dimensional tolerance, mm:
+0/– 0.25
Thickness tolerance, mm:
± 0.25
Edge thickness variation, mm:
<= 0.05
Effective focal length (EFL) tolerance, %:
± 2
Antireflection coating:
dielectric; user specified, R<=0.25% per surface (R<=0.1% is also possible on request)
Damage threshold, J/cm2:
2-5, depending on coating spec.
No.
Diameter, mm
EFL, mm
Central thickness, mm
1
4
6
2.1
2
5
10
3.9
3
10
25
4
4
12.7
50
2
5
25.4
50
5.3
6
25.4
100
4
7
38.1
100
6
Here are some examples of the lens coatings:
Fig. 1. UV Fused Silica plano-convex lens, AR (R <= 0.25%) @ 532nm.
Fig. 2 UV Fused Silica plano-convex lens, AR/AR (R <= 0.25%) @ 532nm & 1064nm.