ISO 11146-2:2021

Lasers and laser-related equipment — Test methods for laser beam widths, divergence angles and beam propagation ratios — Part 2: General astigmatic beams

Publication date: Jul 2, 2021

General information

Current stage: 90.20 Effective date: Jan 15, 2026

Originator: ISO

Owner: ISO/TC 172/SC 9

Type: International Standard

ICS: 31.260

Languages: English French

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Status: Published

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 11146-2:2005

NOW

PUBLISHED
ISO 11146-2:2021
90.20 Standard under periodical review
Jan 15, 2026

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