ISO TR 11146-3-04激光及相关设备—激光束宽、发散角和束传播比试验方法3：固有和几何激光分类、涉及和试验方法的细节.pdf

TECHNICAL ISO/TR REPORT 11146-3 First edition 2004-02-01 Lasers and laser-related equipment — Test methods for laser beam widths, divergence angles and beam propagation ratios — Part 3: Intrinsic and geometrical laser beam classification, propagation and details of test methods Lasers et équipements associés aux lasers — Méthodes dessai des largeurs du faisceau, des angles de divergence et des facteurs de limite de diffraction — Partie 3: Classification intrinsèque et géométrique du faisceau laser, propagation et détails des méthodes dessai Reference number ISO/TR 11146-3:2004(E) ii Contents Page Foreword iv Introduction v 1 Scope 1 2 Second-order laser beam characterization 1 2.1 General 1 2.2 Wigner distribution 1 2.3 First- and second-order moments of Wigner distribution 2 2.4 Beam matrix 3 2.5 Propagation though aberration-free optical systems 4 2.6 Relation between second-order moments and physical beam quantities 4 2.7 Propagation invariants 8 2.8 Geometrical classification 9 2.9 Intrinsic classification 9 3 Background and offset correction 10 3.1 General 10 3.2 Coarse correction by background map subtraction 10 3.3 Coarse correction by average background subtraction 11 3.4 Fine correction of base