We make use of extensive measurement techniques and develop individual measurement setups in order to ensure that our optical components, assemblies and systems comply with your specifications. We create own software to measure customer-specific parameters.
Information about the various methods for material analysis and service life tests can be found under the section Material Analysis.
We employ various highly precise interferometers (up to λ/20 WF PV) to characterize the flatness of optical surfaces as well as wavefront deformations in reflection and transmission. We possess many years of experience in optimally adapting measurement tools and processes to your product. For example, we can conduct measurements in vertical or horizontal testing configurations or take measurements in a clean room or vacuum. Optical surfaces undergo testing using in-house interferometers during the manufacturing process.
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Interferometer measuring facilities at Berliner Glas (selection) |
![]() Leitz PMM-C 700 | ![]() Measurement button configuration |
![]() OGP Smartscope Vantage 650 | |
We use a goniometer with an accuracy of 15 µrad to measure flat and wedge plates, prisms and polygons.
![]() Structure on CrN | White light interferometer
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We use the spectral reflection and transmission measurement process to consistently control and monitor our high quality standards. To measure the material properties of spectral transparency and spectral reflectivity, we employ the Perkin-Elmer Lambda 19, Lambda 900 and Lambda 950 devices.
![]() Schematic diagram of reflection measurement | ![]() Schematic diagram of transmission measurement |
The measurement accuracy of up to 50 µrad depends on the lens geometry.
Cylinder lens centering
Measurement uncertainties (accuracy) when determining the three centering errors of cylinder lenses:
Displacement of the apex line | 4 µm |
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Contortion of the apex line | 25 µrad (at 100 mm lens length) |
Wedge error of the lens | 16 µrad |
An overview of the various cylindrical lenses that we offer at Berliner Glas can be found on the page Cylinder Optics.
![]() MTF measuring system | Modulation Transfer Function (MTF) A large MTF system with a maximum aperture of 200 mm is available to measure imaging quality. In addition to MTF measurement, further characteristics like distortion, field of curvature and focal width for field angles > 90° can be measured. Object and image positions are finitely and infinitely adjustable in wide areas. |
For special demands not included in our standard processes, we develop customer- and application-specific testing areas that allow automatic evaluation using specially adapted software. Our testing processes are the result of close cooperation with the optical design experts and consider the possibility of actively adjusting optical elements in order to guarantee optimum product quality.
Das versetzt uns in die Lage, physikalisch mögliche Leistungsgrenzen zu erreichen und die optimale Qualität Ihrer Produkte zu gewährleisten.
This allows us to achieve the performance limits that are physically possible
Depending on the product and needs at hand, the performance limits physically possible are met and maintained in many cases.
Please choose your contact partner, contact us directly using our contact form or let us call you back.