With ultra-precise objectives, asphericon extends its product range to the area of metrology and redefines Fizeau interferometry. Discover the world-wide only aspheric Fizeau lens a|FizeriC. In addition to reduction of the number of lenses used, the use of a high-end asphere increases the measuring range...
Lenses and optical systems for non-contact measurement
Optical metrology describes the non-contact measurement of objects and physical quantities. In automation, production and testing processes, optical measuring techniques are used to determine differences in shape, speed or color - usually fully automatically, quickly and precisely. The advantages of this type of measurement include the short set-up times, even with frequent changes of the workpieces to be measured, optical measuring processes are quick and usually easy to perform. Compared to conventional measuring methods, optical measuring techniques continue to shine with high measuring accuracy down to the nanometer range. This is made possible using state-of-the-art sensors, high-quality optics and a high degree of automation in the measurement process. The non-contact methods also guarantee the integrity of the measuring surface during the measuring process, making it possible to scan very delicate, fragile and expensive objects without any problems. Complex objects can be measured in seconds and the measurement data can usually be captured in real time.
Optical measurement techniques include a variety of different measurement methods. These include light barrier systems, laser distance measurements, interferometry, optical coherence tomography or microscopy. Application examples can be found in various industries, such as the automotive industry, medical technology and above all the optical industry. In the automotive industry, for example, car body parts can be precisely assembled because they undergo optical form measurements. Thanks to optical measurement technology, medical technology is able to detect lung cancer or tuberculosis at an early stage using photoacoustic spectroscopy. The optical industry uses optical metrology, for example in the form of interferometry. Interferometry is used to measure flat, spherical and aspherical optical surfaces. The superposition of coherent light waves produces a characteristic interference fringe pattern that provides information about the optical surface of a test object to be tested.
The optical measuring methods are made possible by high-quality optics, among other things. With aspheres free of imaging errors or freeform surfaces following the trend towards miniaturization, very high demands can be made on increasingly powerful optics, for example. The most precise reference measurements can be achieved by using first-class Fizeau lenses with outstanding surface quality. Beam shaping optics from asphericon support a wide variety of measurement techniques in the realization of high-energy and powerful beams, e.g. for special laser applications. In order to ensure long-term protection of an optical system against external influences, or to shield certain wavelengths, metrological optics require special coatings such as (anti)reflection or filter coatings. Please do not hesitate to contact us!
Individual aspheres, freeforms, systems and coatings - together we will find the right solution for your optical measurement methods. Please do not hesitate to contact us!
Are you looking for a customized solution for your application? Feel free to ask us! We also develop individual transmission spheres.
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...
Looking for a custom solution? Discover our customized aspheres with unsurpassed surface quality.
Custom Aspheres at a gance
- Customized 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
Choose between asphericon a|High-NA, a|Low-NA and a|UV-grade fused silica. Thanks to CNC polishing and grinding this aspheric lens meets the highest demands on production quality and tolerance.
a|Aspheres at a gance
- Precision polished Aspheres (a|High-NA, a|Low-NA and a|FusedSilica)
- CNC grinding & polishing for superior surface roughness
- Materials: S-LAH64, N-BK7, FusedSilica
- Diameter: 10 mm bis 100 mm
- Off-the-shelf delivery for short lead times
A wide range of measuring instruments is used to achieve accurate measuring results. The specially developed and integrated database system enables measurement results from all manufacturing steps to be documented...
For many applications, various wavebands can be separated with filter coatings. We offer short pass and long pass filters based on dielectric coatings...