Optical components can be characterized by measuring the amount of light scattered at its surface and absorbed by the bulk material or by the dielectric coating. The scattering and absorption properties are limiting factors for its use in high power lasers or technical optics applications. They determine the finesse of an optical resonator or the change of reflectivity of an optical component due to temperature rise of the dielectric coating. The set-ups for measuring the scattering and absorption properties are designed for flat optical components with or without a dielectric coating. The set-up for measuring the scattering properties was built in accordance with the ISO standard ISO/DIS 13696 using a red He-Ne-laser at 633 nm wavelength. The set-up for determining the optical absorption was built following the guidelines of the ISO standard ISO/DIS 11551, but with some improvements was built following the guidelines of the ISO standard ISO/DIS 11551, but with some improvements concerning the temperature sensors and the evaluation procedure. We took part at the round robin experiments for scattering and absorption of optical components for 1064 nm.
展开▼
