idw – Informationsdienst Wissenschaft

Nachrichten, Termine, Experten

Grafik: idw-Logo
Science Video Project

idw-News App:


Google Play Store

Share on: 
01/10/2023 14:20

LZH expands test methods to modern high-performance optics with partners from practice

Lena Bennefeld Kommunikation
Laser Zentrum Hannover e.V.

    The development of new laser systems and optics requires established testing methods for optics to be reviewed and adapted. In the cw-LIDT research project, the Laser Zentrum Hannover e.V. (LZH) is working together with LASEROPTIK GmbH and RAYLASE GmbH to be able to reliably examine high-power laser optics.

    A limiting factor in developing new laser systems is the optical resilience of the components with which the laser radiation is generated and guided. These are necessary to achieve ever higher optical outputs. At the same time, there is a growing demand for low-weight optical components, for example, for use in galvanometer scanners in material processing.

    Ensure performance compatibility of innovative optics

    The scientists at the LZH are therefore developing measurement routines in the project to test and consequently guarantee the performance compatibility of such optics. In this context, the previous findings of the established optics tests cannot be transferred without further ado to modern optics with reduced geometry and therefore lower weight. For example, according to ISO standard 21254, the optics is irradiated at 100 positions. This is not possible with smaller surface areas, since the measuring points influence each other, for example through thermal conduction or thermal stresses.

    With the new measurement routine, the Photonic Materials group of the LZH investigates different optics and uses the results to create models to make optics even more robust in the future. In doing so, they take into account different materials, geometries, and different manufacturing processes. LASEROPTIK develops optics coatings of the highest destructive strength adapted to special geometries. These components are then inserted into a deflection unit manufactured by RAYLASE and tested by the LZH close to the application, i.e. in the finished module and with parameters similar to the later application. The aim is to develop more stable scanner modules.

    About cw-LIDT

    In the project "Standardized test method for high-performance optics in continuous wave operation (cw-LIDT)”, the LZH is working together with LASEROPTIK GmbH, Garbsen, and RAYLASE GmbH, Wessling. The project is funded by the German Federal Ministry for Economic Affairs and Climate Action.


    The LZH adapts together with partners procedures of destruction threshold measurements to be able to test also smaller optics reliably.
    The LZH adapts together with partners procedures of destruction threshold measurements to be able to ...

    Photo: LZH

    Criteria of this press release:
    Business and commerce, Journalists, Scientists and scholars
    Physics / astronomy
    transregional, national
    Research projects


    The LZH adapts together with partners procedures of destruction threshold measurements to be able to test also smaller optics reliably.

    For download



    Search / advanced search of the idw archives
    Combination of search terms

    You can combine search terms with and, or and/or not, e.g. Philo not logy.


    You can use brackets to separate combinations from each other, e.g. (Philo not logy) or (Psycho and logy).


    Coherent groups of words will be located as complete phrases if you put them into quotation marks, e.g. “Federal Republic of Germany”.

    Selection criteria

    You can also use the advanced search without entering search terms. It will then follow the criteria you have selected (e.g. country or subject area).

    If you have not selected any criteria in a given category, the entire category will be searched (e.g. all subject areas or all countries).