The development of lasers at ELOP started in the early 1970’s. For many years the Nd:YAG laser [1,2] at a wavelength of 1.06 microns dominated the Research and Development military laser market. The last two decades have seen the introduction of fiber lasers and many other exotic laser systems at different wavelengths. There are currently more than 200 laser laboratories at the ELOP facility. Most of the laboratories were designed for the development, production and maintenance of 1.06 micron designators and range finders. The laboratories had to meet the safety requirements required by the laser safety standards. Viewing portals, protective goggles, filters, curtains and many other items were acquired to meet these requirements.
The metamorphosis of laser systems and the evolution of new laser systems necessitated a constant reshuffle of laboratories and safety equipment. The obvious items such as laser safety goggles were procured and tested for the new wavelengths. Other materials used around the laboratory were overlooked.
Serendipity is defined as an unplanned fortunate discovery, in this case resulting in the detection of unexpected residual transmission of laser energy. Incorrect assumptions about the spectral transmission of laser protective equipment could result in catastrophic effects. The spectral transmission of previously certified materials was reviewed.
A calibrated Spectrophotometer was used to measure the spectral transmission of the materials from the UV to the Mid Wave IR (MWIR). Other models and methods were used to authenticate the results. The results were also compared to measurements made in previous studies.
This paper discusses the method and summarizes the results. Some interesting unexpected findings were made.