Aspheres - best imaging properties

Aspheres have much better imaging properties than spherical lenses thanks to the surface geometry that deviates from a sphere. The main benefit is the ability to correct spherical aberrations. The total number of optical elements in an optical system can be reduced by using an aspheric lens. This enables a significantly more compact and efficient setup than is the case for a comparable system with spherical lenses.

The main benefit of an aspheric lens is its radius of curvature that varies radially from the center of the lens. These properties allow the correction of aberrations, which arise from the shape of a sphere. Incoming light is refracted in such a way that the rays meet at one focal point on the optical axis. The result are clear, sharp images. Learn more about avoiding aberrations, the benefits and applications of aspherical lenses.

Based on an unique technology, asphericon is able to produce aspherical optics with a surface form deviation (RMSi) from up to 0,01 µm. In cooperation with our customers we are developing and producing suitable solutions for a big variety of optical lenses – from the prototype to series. Choose an individual Custom solution or use the innovative diversity of our stocked aspheric lens from the StockOptics product line. a|Aspheres are available in our web shop with surface form deviations of RMSi ≤ 0.5 μm and RMSi <0.3 μm. Due to precise focusing properties, all optics and components from asphericon are suitable for a wide variety of applications.

Discover our extensive range of individual and stocked products:

as well as our services in the field of optical coating for the spectra:

asphericon manufactures according to RoHS and REACH regulations which is guaranteed by appropriate certificates.

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CNC processing, diamond turning or High-End Finishing - asphericon offers aspheres made of various materials (e.g. glass, fused silica, PMMA, metals, IR crystals) with best quality and highest accuracy. We are focused on optimized development and production times without ever losing sight of our customers’ economic interests.

Diameter8-300 mm4-250 mm6-300 mm1-420 mm
Center thickness2-60 mm2-60 mm< 60 mmfrom 0.5 mm
RMSi Irregularity0.75-0.3 µm0.09 µm< 0.015 µm20 nm
Surface roughness3 nm1.5 nm0.5 nm1 nm
Surface Imperfections (Scratch/Dig)60 - 4040 - 2010 - 5 for Ø <2";
20 - 10 for Ø >2"
Full-surface interferometric measurementoptionaloptionalguaranteedguaranteed
Coating customer-specific
Materials customer-specific (almost every type of glass, silica,  germanium, silicon, IR lenses, zerodur)
Mounting customer-specific
RoHS & REACH Conformity certified


Download data sheet production capabilities

You can find out all about aspheres and their benefits in our “Utilizing Aspheres” optics poster. We would be more than happy to send you a free copy.

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 Customized Aspheres*Stocked Aspheres
Diameter4-300 mm10 - 100 mm
Diameter Tolerance+/- 0,03 mm+/- 0,05 mm
RMS irregularities (RMSi)20 nm≤ 300 nm
Surface Imperfections (Scratch/Dig)20-1020-20
Coating Customer specific4 standard coatings
Laser damage thresholdNA12 J/cm², 100 Hz, 6 ns, 532 nm**
Measurement (optional)Full-surface interferometricallyFull-surface interferometrically
Delivery timeFrom 3-4 weeksFrom 1 day
 Download Data SheetDownload Data Sheet

*Best-fit-specifications | **100 Hz, 6ns, 532 nm

Custom Aspheres

asphericon manufactures aspheric optics with diameters of between 1 mm and 420 mm and with a roughness value of up to 0.5 Rq. Our experienced team works together with you to develop customised optical designs and manufactures aspheres as per the required specifications. We would be pleased to develop the right aspheric solution for you. We look forward to receiving your enquiry.

Production capabilities

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StockOptics Aspheres

You are searching for aspherical optics with short delivery times and excellent optical properties?
In our Webshop you will find precision-polished aspheres (a|High-NA, a|Low-NA, a|UV-grade fused silica) with diameters between 10 mm and 100 mm. Benefit from surfaces with outstanding quality (RMSi up to < 0.3 µm) available in different standard coatings and delivery direct from the warehouse.

StockOptics Catalog Europe 2023

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High precision aspherical optics with fast delivery times.

asphericon webshop

Learn more about our product range of aspherical optics. asphericon also manufactures high-precision axicons, aspheric cylinders, mirrors and reflectors as well as mounted optics, beam expanders, beam shapers, optomechanical components and customized optical systems.

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