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BS EN ISO 11146-2:2021

BS EN ISO 11146-2:2021

$142.49

Lasers and laser-related equipment. Test methods for laser beam widths, divergence angles and beam propagation ratios – General astigmatic beams

Published By Publication Date Number of Pages
BSI 2021 26
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This document specifies methods for measuring beam widths (diameter), divergence angles and beam propagation ratios of laser beams. This document is applicable to general astigmatic beams or unknown types of beams. For stigmatic and simple astigmatic beams, ISO 11146-1 is applicable.

Within this document, the description of laser beams is accomplished by means of the second order moments of the Wigner distribution rather than physical quantities such as beam widths and divergence angles. However, these physical quantities are closely related to the second order moments of the Wigner distribution. In ISO/TR 11146-3, formulae are given to calculate all relevant physical quantities from the measured second order moments.

PDF Catalog

PDF Pages PDF Title
2 National foreword
4 European foreword
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
14 4 Coordinate system
5 Test principles
5.1 General
5.2 Spatial second order moments of the Wigner distribution
5.3 Second order moments of the Wigner distribution
5.4 Derived quantities
6 Measurement arrangement and test equipment
6.1 General
6.2 Preparation
15 6.3 Control of environment
6.4 Detector system
6.5 Beam-forming optics and optical attenuators
16 7 Measurement of the second order moments
7.1 General
7.2 Measurement of the second order moments of power density distributions
18 7.3 Measurement of all second order moments of the Wigner distribution
20 8 Determination of effective beam propagation ratio
9 Determination of intrinsic astigmatism
21 10 Determination of the twist parameter
11 Test report
24 Bibliography

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BS EN ISO 11146-2:2021
$142.49