Aspheric Lenses

Aspheric lenses are designed to be diffraction limited. They usually achieve a smaller spot size than both the plano-convex and positive meniscus lens. This provides the highest power density at the lens workpiece with equivalent focal length.

 

Specifications
Standards
Effective Focal Length (EFL) Tolerance
±2%
Dimensional Tolerance
Diameter: +0.000”-0.005”
Thickness: ±0.003”
Edge Thickness Variation (ETV)
<= 0.0005”
Clear Aperture (polished)
90% of diameter
Surface Figure at 0.63µm
Varies depending upon radius
Scratch-Dig
40-20
AR Coating Reflectivity per Surface at 10.6µm
<= 0.20%
Part #
Description
Diameter
(inches)
Diameter
(mm)
Focal
Length
796278
ZnSe
1.1”
27.94
1.5”
942147
ZnSe
1.1”
27.94
1.5”
684500
ZnSe
1.1”
27.94
2.5”
679268
ZnSe
1.5”
38.10
1.5”
739932
ZnSe
1.5”
38.10
5.0”

Specifications
Standards
Effective Focal Length (EFL) Tolerance
±2%
Dimensional Tolerance
Diameter: +0.000”-0.005”
Thickness: ±0.003”
Edge Thickness Variation (ETV)
<= 0.0005”
Clear Aperture (polished)
90% of diameter
Surface Figure at 0.63µm
Varies depending upon radius
Scratch-Dig
40-20
AR Coating Reflectivity per Surface at 10.6µm
<= 0.20%