Calibration of tuneable laser sources (IEC 62522:2014); German version EN 62522:2014
Edition 2015-01

Lasers and laser-related equipment - Test methods for laser beam widths, divergence angles and beam propagation ratios - Part 2: General astigmatic beams (ISO 11146-2:2021); German version EN ISO 11146-2:2021
Edition 2021-11

Lasers and laser-related equipment - Test methods for laser beam widths, divergence angles and beam propagation ratios - Part 1: Stigmatic and simple astigmatic beams (ISO 11146-1:2021); German version EN ISO 11146-1:2021
Edition 2021-11

Acoustics - Measurements on silencers in situ (ISO 11820:1996); German version EN ISO 11820:1996
Edition 1997-04

Synthetic quartz crystal - Specifications and guidelines for use (IEC 60758:2016); German version EN 60758:2016
Edition 2017-04

Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-7: Examinations and measurements - Wavelength dependence of attenuation and return loss of single mode components (IEC 61300-3-7:2021); German version EN IEC 61300-3-7:2021
Edition 2022-11

Horological definitions; technical commercial definitions
Edition 1987-01

Acoustics - Determination of sound absorption coefficient and impedance in impedances tubes - Part 1: Method using standing wave ratio (ISO 10534-1:1996); German version EN ISO 10534-1:2001
Edition 2001-10

Optical amplifiers - Test methods - Part 5-1: Reflectance parameters - Optical spectrum analyzer method (IEC 61290-5-1:2006); German version EN 61290-5-1:2006
Edition 2007-03

Optical amplifiers - Test methods - Part 5-2: Reflectance parameters - Electrical spectrum analyser method (IEC 61290-5-2:2003); German version EN 61290-5-2:2004
Edition 2004-12