EN ISO 12005:1999
(Main)Lasers and laser-related equipment - Test methods for laser beam parameters - Polarization (ISO 12005:1999)
Lasers and laser-related equipment - Test methods for laser beam parameters - Polarization (ISO 12005:1999)
This Standard defines a method for determining the polarization status and, whenever possible, the degree of polarization of laser beams.
Laser und Laseranlagen - Prüfverfahren für Laserstrahlparameter - Polarisation (ISO 12005:1999)
Diese Internationale Norm legt ein Verfahren zur Bestimmung des Polarisationszustandes und, soweit möglich, des Polarisationsgrades für den Strahl eines Dauerstrich-Lasers fest. Sie kann auch auf repetitiv gepulste Laser angewandt werden, wenn sich deren Ausrichtung des elektrischen Feldvektors von Puls zu Puls nicht ändert. Diese Internationale Norm definiert ebenfalls das Verfahren zur Bestimmung der Richtung der Schwingungsebene für den Fall (vollständig oder teilweise) liner polarisierter Laserstrahlen.
Lasers et équipements associés aux lasers - Méthodes d'essai des paramètres des faisceaux laser - Polarisation (ISO 12005:1999)
L’IEC 61191-4:2017 donne des exigences relatives à l'assemblage de bornes par brasage. Les exigences de la présente spécification s'appliquent aux ensembles entièrement constitués d'après des structures d'interconnexion borne/fil et aux portions borne/fil de ces ensembles incluant d'autres techniques associées (par exemple montage en surface, montage par trous traversants, montage à puce).
Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
Mise à jour des exigences pour satisfaire aux critères d’acceptation décrits dans l’IPC‑A‑610F.
Laserji in laserska oprema – Preskusne metode za parametre laserskega žarka – Polarizacija (ISO 12005:1999)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 12005:2000
01-januar-2000
Laserji in laserska oprema – Preskusne metode za parametre laserskega žarka –
Polarizacija (ISO 12005:1999)
Lasers and laser-related equipment - Test methods for laser beam parameters -
Polarization (ISO 12005:1999)
Laser und Laseranlagen - Prüfverfahren für Laserstrahlparameter - Polarisation (ISO
12005:1999)
Lasers et équipements associés aux lasers - Méthodes d'essai des parametres des
faisceaux laser - Polarisation (ISO 12005:1999)
Ta slovenski standard je istoveten z: EN ISO 12005:1999
ICS:
31.260 Optoelektronika, laserska Optoelectronics. Laser
oprema equipment
SIST EN ISO 12005:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 12005:2000
INTERNATIONAL ISO
STANDARD 12005
First edition
1999-07-15
Lasers and laser-related equipment — Test
methods for laser beam parameters —
Polarization
Lasers et équipements associés aux lasers — Méthodes d'essai des
paramètres des faisceaux laser — Polarisation
A
Reference number
ISO 12005:1999(E)
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SIST EN ISO 12005:2000
ISO 12005:1999(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
member bodies). The work of preparing International Standards is normally carried out through ISO technical
committees. Each member body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, governmental and non-governmental, in
liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
International Standard ISO 12005 was prepared by Technical Committee ISO/TC 172, Optics and optical
instruments, Subcommittee SC 9, Electro-optical systems.
Annex A of this International Standard is for information only.
© ISO 1999
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
or mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet iso@iso.ch
Printed in Switzerland
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ISO 12005:1999(E)
Introduction
This International Standard defines a relatively quick and simple method, requiring minimum equipment, for
determining the state of polarization of a laser beam.
This method is suitable for most of the current needs with well-polarized laser beams. However, if more
completeness in the determination of the polarization status is needed, the use of a more sophisticated analysing
device is necessary. Although not in the scope of this International Standard, the principle of operation of such
devices is given in annex A, together with a description of the Stokes parameters which are needed in that case.
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SIST EN ISO 12005:2000
INTERNATIONAL STANDARD © ISO ISO 12005:1999(E)
Lasers and laser-related equipment — Test methods for laser
beam parameters — Polarization
1 Scope
This International Standard defines a method for determining the polarization status and, whenever possible, the
degree of polarization of the beam from a cw laser. It can also be applied to repetitively pulsed lasers, if their electric
field vector orientation does not change from pulse to pulse.
This International Standard also defines the method for determining the direction of the plane of vibration in the case
of linearly polarized (totally or partially) laser beams. Unless otherwise stated, it is assumed that the laser radiation
is quasi-monochromatic and sufficiently stable for the purpose of the measurement.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this International Standard. For dated references, subsequent amendments to, or revisions of, any of these
publications do not apply. However, parties to agreements based on this International Standard are encouraged to
investigate the possibility of applying the most recent editions of the normative documents indicated below. For
undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC
maintain registers of currently valid International Standards.
ISO 11145:1994, Optics and optical instrument — Lasers and laser-related equipment — Vocabulary and symbols.
IEC 61040:1990, Power and energy measuring detectors — Instruments and equipment for laser radiation.
CIE 59:1984, Definitions and Nomenclature, Instrument Polarization.
3 Terms and definitions
For the purposes of this International Standard, the terms and definitions given in ISO 11145, IEC 61040 and
CIE 59 and the following apply.
3.1
polarization
restriction of electromagnetic wave motion to certain directions
NOTE This is a fundamental phenomenon which can be explained by the concept that electromagnetic radiation is a
transverse wave motion, i.e. the vibrations are at right angles to the direction of propagation. It is customary to consider these
vibrations as being those of the electric field vector.
3.2
state of polarization
classification of polarization as linear, random, circular, elliptical or unpolarized
3.3
direction of vibration
direction of the electric field vector of an electromagnetic wave
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3.4
plane of vibration
plane containing the electric field vector and the direction of propagation of the electromagnetic radiation
3.5
ellipticity
b/a
^elliptically polarized radiation& ratio of the minor semiaxis b of the ellipse to the major semiaxis a of the ellipse
NOTE The ellipse is described by the motion of the terminal point of the electric field vector in a transverse plane to the
direction of radiation propagation (see annex A).
3.6
ellipticity angle
e
angle whose tangent is the ellipticity
NOTE The ellipticity angle is constrained to 245° < e < + 45°. When e = ±45° the polarization is circular, and when e = 0°
the polarization is linear (see annex A).
3.7
azimuth
FF
angle between the major axis of the instantaneous ellipse and a reference axis perpendicular to the direction of
propagation
NOTE See annex A.
3.8
linear polarizer
optical device whose output is linearly polarized, without regard to the state and degree of polarization of the
incident radiation
3.9
extinction ratio
^linear polarizer& measure of the quality of the linear polarizer
NOTE If perfectly linearly polarized radiation is incident on a polarizer, then the extinction ratio of the polarizer is given by:
t r
min min
extinction ratio = =
t r
max max
where
t (r) is the maximum transmittance (reflectance) and
max max
t (r) is the minimum transmittance (reflectance)
min min
of power (energy) through (of) the linear polarizer.
3.10
quarter-wave plate
optical device which resolves an incident totally polarized beam of radiation into two orthogonally polarized
components and introduces a 90° phase shift between them
3.11
Stokes parameters
set of four real quantities which completely describe the polarization state of monochromatic or quasi-
monochromatic radiation
NOTE The parameters are, collectively, known as the Stokes vector, a 4 3 1 vector (see annex A for a complete
description and formulae for Stokes parameters).
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4 Test method for state of polarization
4.1 Principle of measurement
The first test for laser beam polarization determines whether the beam is linearly polarized. This involves recording
the maximum and minimum levels of the transmitted radiation while the angular orientation of the linear polarizer is
varied. See Figure 1.
If the beam is not linearly polarized (according to the criteria given in 4.5), it is tested for elliptical or circular
polarization. For this test the beam is measured after transmission by both a quarter-wave plate and a linear
polarizer. See Figure 2.
If not in any of these states, the laser beam is only partially polarized or unpolarized.
4.2 Equipment arrangement
See Figures 1 and 2 for the experimental set-up.
Key
1 Laser
2 Reference axis
3 Polarizer
4 Detector
5 Laser beam
a) Rotation 180°
Figure 1 — Schematic arrangement of the test for linear polarization
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Key
1 Laser
2 Reference axis
3 Polarizer
4 Detector
5 Laser beam
6 Quarter-wave plate
a) Rotation 180°
Figure 2 — Schematic arrangement of the test for elliptical or circular polarization
4.3 Components
4.3.1 Radiation detector
The provisions of IEC 61040:1990 apply to the radiation detector; clauses 3 and 4 are particularly important with the
exception that only relative measurements a
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