Lasers and laser-related equipment. Test methods for laser beam widths, divergence angles and beam propagation ratios Intrinsic and geometrical laser beam classification, propagation and details of test methods

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

31-05-2006

Publisher

British Standards Institution

Foreword
Introduction
1 Scope
2 Second-order laser beam characterization
  2.1 General
  2.2 Wigner distribution
  2.3 First- and second-order moments of Wigner distribution
  2.4 Beam matrix
  2.5 Propagation though aberration-free optical systems
  2.6 Relation between second-order moments and physical beam quantities
  2.7 Propagation invariants
  2.8 Geometrical classification
  2.9 Intrinsic classification
3 Background and offset correction
  3.1 General
  3.2 Coarse correction by background map subtraction
  3.3 Coarse correction by average background subtraction
  3.4 Fine correction of baseline offset
4 Alternative methods for beam width measurements
  4.1 General
  4.2 Variable aperture method
  4.3 Moving knife-edge method
  4.4 Moving slit method
Annex A (informative) Optical system matrices
Bibliography

Specifies methods for measuring beam widths (diameter), divergence angles and beam propagation ratios of laser beams in support of ISO 11146-1.

This part of ISO11146 specifies methods for measuring beam widths (diameter), divergence angles and beam propagation ratios of laser beams in support of ISO11146-1. It provides the theoretical description of laser beam characterization based on the second-order moments of the Wigner distribution, including geometrical and intrinsic beam characterization, and offers important details for proper background subtraction methods recommendable for matrix detectors such as CCD cameras. It also presents alternative methods for the characterization of stigmatic or simple astigmatic beams that are applicable where matrix detectors are unavailable or deliver unsatisfying results.

Committee	CPW/172
DevelopmentNote	Supersedes 01/714515 DC (05/2006)
DocumentType	Standard
Pages	32
PublisherName	British Standards Institution
Status	Current
Supersedes	BS EN ISO 11146:2000 01/714515 DC : DRAFT NOV 2001

Standards	Relationship
ISO/TR 11146-3:2004	Identical

ISO 11146-1:2005	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 11146-2:2005	Lasers and laser-related equipment Test methods for laser beam widths, divergence angles and beam propagation ratios Part 2: General astigmatic beams
IEC 61040:1990	Power and energy measuring detectors, instruments and equipment for laser radiation

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PD ISO/TR 11146-3:2004

Current

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Abstract

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