An aspheric mirror is, like the parabolic mirror, a concave mirror. The aspherical shape of the mirror allows an improved geometric-optical imaging.
The group of aspheric mirrors also includes paraboloids, hyperboloids and ellipsoids. These, as well as mirrors with a customer-specific aspherical surface, are among the specialties of asphericons product range.
Depending on the material used, both CNC technologies of grinding and polishing, as well as diamond turning, are used in the production of aspherical on- and off-axis mirrors as well as reflectors (see figures 1 and 2). The material is selected according to the customers needs, with the range covering almost all types of glass, as well as quartz, germanium, silicon, zerodur, infrared glass and calcium fluoride.
Thanks to optimized production technologies, high-end finishing such as asphericon ION-Finish TM and Magnetorheological Finishing-Technology® (MRF) as well as high-precision, full-surface and non-contact measurement asphericon manufactures aspheric and parabolic mirrors of the highest quality.
Depending on the requirements of our customers, accuracies of up to 50 nm global form deviation (irregularity) or 25 nm RMSi are achieved. The achievable roughnesses are, depending on the material and shape, up to 0.5 Rq. Learn more about our manufacturing capabilities.
Just as diverse as the possibilities for coating aspherical mirrors are also their fields of application.
Besides being used in light sources, they are e.g. used for laser applications and in material processing. What’s more, aspheric mirrors are increasingly being employed in space and astronomy (e.g. reflector telescopes). They are used in the following areas:
Whether you are looking for components for telescopes or measuring technology, asphericon offers complex solutions and the highest precision from a single source. Starting with optical design and the production of your mirrors, asphericon also produce coated elements, such as dielectric mirrors for single wavelengths, two wavelengths and the entire bandwidth as well as metallic mirror coatings made from aluminum, gold and silver. Learn more about the details of asphericon coating, too.