Focusing Lens - Glass Aspheric Lens

Aspheric Lenses

Compared to conventional spherical lenses, the most significant advantage of aspherical lenses is that they can perform spherical aberration correction. Aspheric lenses allow the designer to correct the aberration with fewer optical lenses than spherical lenses, so the optical system can be lower at cost and more compact in size.


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Part NumberWavelength (nm)EFL (mm)Dia (mm)MaterialET (mm)CT (mm)BFL (mm)
LFAS-35-40-ET5.43 *NEW*107540.035.0Fused Silica5.4313.630.6
LFAS-35-50-ET3.82 *NEW*107550.035.0Fused Silica3.8210.242.2
LZSE-25.4-12.7Uncoated12.725.4Zinc Selenide---
LZSE-25.4-25.4Uncoated25.425.4Zinc Selenide---
LZSE-25.4-50.8Uncoated50.825.4Zinc Selenide---

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 60/40
AR Coating: R<0.2% per surface @ 1030-1090nm
Material: Fused Silica, Suprasil 313, Corning 7980, Si, Ge, ZnS, ZnSe, Chalcogenides
Coating: Options Available

Aspherical Lens & Spherical Lens Diagram

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What is an aspheric lens?

An aspheric lens is a type of optical lens that has a non-spherical surface. Unlike traditional spherical lenses that have a constant curvature across their surface, aspheric lenses have a varying curvature that allows them to correct for aberrations and improve image quality.

One advantage of aspheric lenses is that they can reduce the number of lenses needed in an optical system, making them lighter and more compact. Additionally, aspheric lenses can be designed to have a wider field of view.

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