ISO/TR 11146-3:2004 PDF

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

First page of standard ISO/TR 11146-3:2004

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Title (English):

ISO/TR 11146-3:2004

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 22
Publication date:: January 22, 2004
Edition:: ISO TR 11146 edition 1 version 1
ICS:: 31.260

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Description (English):

ISO/TR 11146-3:2004 specifies methods for measuring beam widths (diameter), divergence angles and beam propagation ratios of laser beams in support of ISO 11146-1. 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.

Technical details

Technical committee: ISO/TC 172/SC 9 - Laser and electro-optical systems
SKU: ISO/TR 11146-3:2004

Abstract

Overview

ISO/TR 11146-3:2004 - part of the ISO 11146 series - provides the theoretical and practical background for characterizing laser beams by their beam widths, divergence angles and beam propagation ratios. It supports ISO 11146-1 and complements ISO 11146-2 by describing beam classification (intrinsic and geometrical) based on the second-order moments of the Wigner distribution, the 4×4 beam matrix, and practical details for acquiring reliable measurements with matrix detectors (e.g., CCD cameras).

Key topics

Second-order moment theory: formal description of beam characterization using the Wigner distribution and ten independent second-order moments that describe spatial extent, divergence and phase properties.
Beam matrix and propagation: collection of second-order moments into a beam matrix and rules for propagation through aberration-free optical systems using system matrices.
Geometrical and intrinsic classification: criteria for identifying stigmatic, simple astigmatic and more general beam types based on moment analysis.
Background and offset correction: recommended procedures for background subtraction and baseline offset correction specific to matrix detectors (CCD cameras) to improve measurement accuracy.
Alternative measurement methods: indirect methods for stigmatic or simple astigmatic beams when matrix detectors are unavailable or yield unsatisfactory results - including variable aperture, moving knife-edge, and moving slit approaches.
Practical measurement dependencies: guidance on when reduced-parameter descriptions apply (e.g., symmetric beams requiring fewer than ten parameters).

Applications

Laser manufacturers and component suppliers: design validation and production testing of beam quality and propagation behavior.
Optical engineers and system integrators: prediction of beam behavior through lenses and optical systems using beam matrix propagation.
Metrology and test laboratories: standardized measurement procedures for reporting beam widths, divergences and beam propagation ratios (M² / beam quality).
R&D groups and quality assurance: troubleshooting detector preprocessing (background subtraction) and choosing suitable measurement methods when matrix detectors are limited.

Who should use this standard

Optical and photonics engineers
Laser test laboratories and calibration services
Product compliance and QA teams in laser-related industries
Researchers working on beam characterization or laser system design

Related standards

ISO 11146-1: Stigmatic and simple astigmatic beams (measurement methods)
ISO 11146-2: General astigmatic beams (measurement of all second-order moments)

ISO/TR 11146-3:2004 is primarily informative and provides essential theoretical context and detector-preprocessing guidance to ensure consistent, reproducible laser beam measurements across industry and research.

Related standards

Mentioned in the description and other ISO standards

Abstract

Overview

Key topics

Second-order moment theory: formal description of beam characterization using the Wigner distribution and ten independent second-order moments that describe spatial extent, divergence and phase properties.
Beam matrix and propagation: collection of second-order moments into a beam matrix and rules for propagation through aberration-free optical systems using system matrices.
Geometrical and intrinsic classification: criteria for identifying stigmatic, simple astigmatic and more general beam types based on moment analysis.
Background and offset correction: recommended procedures for background subtraction and baseline offset correction specific to matrix detectors (CCD cameras) to improve measurement accuracy.
Alternative measurement methods: indirect methods for stigmatic or simple astigmatic beams when matrix detectors are unavailable or yield unsatisfactory results - including variable aperture, moving knife-edge, and moving slit approaches.
Practical measurement dependencies: guidance on when reduced-parameter descriptions apply (e.g., symmetric beams requiring fewer than ten parameters).

Applications

Laser manufacturers and component suppliers: design validation and production testing of beam quality and propagation behavior.
Optical engineers and system integrators: prediction of beam behavior through lenses and optical systems using beam matrix propagation.
Metrology and test laboratories: standardized measurement procedures for reporting beam widths, divergences and beam propagation ratios (M² / beam quality).
R&D groups and quality assurance: troubleshooting detector preprocessing (background subtraction) and choosing suitable measurement methods when matrix detectors are limited.

Who should use this standard

Optical and photonics engineers
Laser test laboratories and calibration services
Product compliance and QA teams in laser-related industries
Researchers working on beam characterization or laser system design

Related standards

ISO 11146-1: Stigmatic and simple astigmatic beams (measurement methods)
ISO 11146-2: General astigmatic beams (measurement of all second-order moments)

ISO/TR 11146-3:2004 PDF

Technical details

Abstract

Overview

Key topics

Applications

Who should use this standard

Related standards

Related standards

Abstract

Overview

Key topics

Applications

Who should use this standard

Related standards

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