Aspheric Lenses

Aspheric LensesAspheric 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”