PaLaSi – Passive Laser Safety for High-power Lasers in Industrial Applications

The aim of the research project is to regulate the dimensioning of passive laser safety barriers due to measured values, that are statistically confirmed and taken under standardized conditions.

Motivation

Passive laser safety barriers still represent the most important type of protection against laser beam power in material processing. Previous safety barriers can not ensure safety anymore, because of the development and the application of brilliant, high-energy laser beam sources. The not ensured safety is the reason for the need to devise new safety concepts. Due to the fact, that Germany has a lot of exportation, it wants to rise to the challange, producing products as economical as possible to remain competitive on the inernational market. In contrast to this aim, the appropriate safety barriers are currently selected by trial and error, what makes the application of modern laser beam sources for material processing  expensive and in certain cases unprofitable for small and medium-sized businesses.

Purpose

It is the purpose of this research project, to regulate the construction of passive laser safety barriers due to measured values, that are statistically confirmed and taken under standardized conditions. This is to be the enabler not to select future laser safety barriers by trial and error, but by deterministic methods. Procedure In a first step a standardized test method is to be developed, based on given statutory provisions and technical frame conditions. An experimental setup for safety barriers has to be designed, constructed and built afterwards suitable for this test method. Experiments on all already used safety barriers run by means of this experimental setup. Experiments are carried out on novel material and innovative wall-geometires in addition to this. The experimental results are used in tables, that enables the estimation of the optimal safety barrier due to the expected maximum exposure (EME).

Results

Lots of protection time experimemts were carried out with different material first. Than the characteristics of several material was simulated and a method was developed to construct passive laser safety barriers. 

Acknowledgement

The iwb thanks the Research Association on Welding and Allied Processes of the DVS Aachener Str.172, 40223 Düsseldorf for the IGF-project Nr. 15.594 N’s sponsoring. The project was supported by the AiF within the framework of the programme to encourage the cooperative industrial research (IGF) of the Federal Ministry of economics and Technology based on a resolution of the German Bundestag.