Aspheres
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:
- Aspherical optics (also with high-precision mounts)
- Assemblies and
- Optical systems
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.
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.
| Standard-Quality | Precision-Quality | High-End-Finishing | Diamond-Turning | |
|---|---|---|---|---|
| Diameter | 8-300 mm | 4-250 mm | 6-300 mm | 1-420 mm |
| Center thickness | 2-60 mm | 2-60 mm | < 60 mm | from 0.5 mm |
| RMSi Irregularity | 0.75-0.3 µm | 0.09 µm | < 0.015 µm | 20 nm |
| Surface roughness | 3 nm | 1.5 nm | 0.5 nm | 1 nm |
| Surface Imperfections (Scratch/Dig) | 60 - 40 | 40 - 20 | 10 - 5 for Ø <2"; 20 - 10 for Ø >2" | |
| Full-surface interferometric measurement | optional | optional | guaranteed | guaranteed |
| Coating | customer-specific | |||
| Materials | customer-specific (almost every type of glass, silica, germanium, silicon, IR lenses, zerodur) | |||
| Mounting | customer-specific | |||
| RoHS & REACH Conformity | certified | |||
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.
Comparison
| Customized Aspheres* | Stocked Aspheres | |
|---|---|---|
| Diameter | 4-300 mm | 10 - 100 mm |
| Diameter Tolerance | +/- 0,03 mm | +/- 0,05 mm |
| RMS irregularities (RMSi) | 20 nm | ≤ 300 nm |
| Surface Imperfections (Scratch/Dig) | 20-10 | 20-20 |
| Coating | Customer specific | 4 standard coatings |
| Laser damage threshold | NA | 12 J/cm², 100 Hz, 6 ns, 532 nm** |
| Measurement (optional) | Full-surface interferometrically | Full-surface interferometrically |
| Delivery time | From 3-4 weeks | From 1 day |
| Download Data Sheet | Download 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.
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.
High precision aspherical optics with fast delivery times.
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 and customized optical systems.
asphericon GmbH
Stockholmer Str. 9
07747 Jena
phone +49 (0) 3641 3100 500
fax +49 (0) 3641 3100 501
sales[at]asphericon.com
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