Aspheric Focusing Lens

Aspheric Focusing Lens

 

Compared to conventional spherical lens, the most significant advantage of the aspherical lens is that it can perform spherical aberration correction. The aspheric lens allows the designer to correct the aberration with fewer optical lenses than the spherical lenses, so the optical system can be lower at cost and more compact in size.
As shown in the following figure, incident light rays focus at different points due to spherical aberration, which is unavoidable for all spherical lenses. While light rays focus to a small point for the aspherical lens.

We supply aspheric lens for fiber laser 1030-1090nm in below table, custoimized aspheric lens is also welcomed.

Specifications

Diameter Tolerance

+0/-0.13mm

Thickness Tolerance

±0.25mm

Focal Length Tolerance

±2%

Edge Thickness Variation (ETV)

≤3 arc min.

Clear Aperture

>90%

Aspheric Accuracy

≤1μm P-V 

Surface Quality

40-20 S-D

AR Coating

R<0.2% per surface@1030-1090nm

Material

Suprasil 313 or Coning 7980

 

Part No.

Diameter (mm)

EFL(mm)
BFL(mm)
ET(mm)
LFAS-1.5-100-ET4 38.1 100.0 95.2 4
LFAS-1.5-125-ET4 38.1 125.0 120.7 4
LFAS-1.5-150-ET4 38.1 150.0 146.0 4
LFAS-1.5-200-ET4 38.1 200.0 196.4 4

NOTE: High power focusing lenses of different focal lengths are available upon request.


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