Custom Aspheres
Custom Aspheres
Looking for a custom solution? Discover our customized aspheres with unsurpassed surface quality and following specifications:
- Aspheric optics for UV/VIS/IR range
- Individual optical designs for for all types of applications
- Diffraction-limited quality with a Strehl ratio up to 0.99
- Outstanding surface quality with roughness values as low as 5 Å
- High-end optical coatings
Comparison
| 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 | |||
Advantages of Custom Aspheres
From prototype construction and small quantities to small and large series: asphericon convinces with precision that surpasses standards. Since 2008, the company fulfills the high demands of ISO 9001 for high-quality work processes.
... and a patented control software which is constantly being further developed allow highest quality, flexibility and economy. Convince yourself not only of asphericon's manufacturing technologies, but also of its unique High-End-Finishing processes, ultra-precise measurement capabilities and high-quality coating technologies (e.g. sputtering).
From analysis and conception to final implementation and characterization: asphericon develops the best possible optical design based on your requirements and pays particular attention to optimum development and production times – while always keeping an eye on the costs for our customers. Together we will find the right solution for your application.
Technological leadership combined with a broad range of products and services form the basis for asphericon's specific optical solutions. As a reliable partner, we are happy to advise and support you in numerous areas, such as the first optical design, manufacturing and coating, high-precision measurement, and optical characterization.
- Star tracking with aspheres
Aspheres for Sentinel-4 satellite
Customer Reference
Project Details
The Sentinel-4 satellite is part of the Copernicus programme, a joint EU-ESA project. Equipped with two high-resolution spectrometers, its mission is the complete monitoring of Europe and North Africa for high-precision real-time data for environmental management.
Project Realisation
- Developing and manufacturing lenses to withstand extreme conditions in space
- Through development work and complex test procedures with demanding materials (e.g., CaF2)
- Aspheres with diameters of 50 mm to 80 mm, a spectral resolution of 0.12 to 0.5 nm, and Ångstrom polish roughness values of 5 Å
Star tracking with aspheres
Customer Reference
Project Details
Satellite technologies are indispensable in earth observation, climate monitoring and navigation. An important factor for the success of such projects is the autonomous position determination. Together with Terma A/S, a leading supplier in the development of attitude sensors, it was possible to develop an optical system based on a novel and extremely compact optical design, which meets the highest space requirements and delivers most accurate results.
Project Realisation
- Optical design: ultra-compact system using aspheric and spherical components
- Material: radiation-resistant lenses with high-end form tolerances (≤ 0,5 fr), roughness (≤ 0,002 µm) and imperfection tolerances
- Coating: Super broadband AR-coating (ARSBB 480 - 850nm) to support thermal stability
