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%
|
CO2 LASER OPTICS
