1、BRITISH STANDARDBS EN ISO 12005:2003Incorporating Corrigendum No. 1Lasers and laser-related equipment Test methods for laser beam parameters PolarizationThe European Standard EN ISO 12005:2003 has the status of a British StandardICS 31.260g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g
2、44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS ISO 12005:2003This British Standard was published under the authority of the Standards Policy and Strategy Committee on 1 May 2003 BSI 14 July 2003ISBN 0 580
3、41658 5National forewordThis British Standard is the official English language version of EN ISO 12005:2003. It is identical with ISO 12005:2003. It supersedes BS EN ISO 12005:2000 which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee CPW/172, Optics and opt
4、ical instruments, to Subcommittee CPW/172/9, Electro-optical systems, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications ref
5、erred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provi
6、sions of a contract. Users are responsible for its correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation,
7、or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN ISO titlepage, the EN ISO foreword page, the ISO title page, pages i
8、i to v, a blank page,pages 1 to 11, the Annex ZA page, an inside back cover and a back cover.The BSI copyright date displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date Comments14580 Corrigendum No. 114 July 2003 Correction to EN ISO
9、 foreword page and addition of Annex ZA pageEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 12005April 2003ICS 31.260 Supersedes EN ISO 12005:1999English versionLasers and laser-related equipment - Test methods for laserbeam parameters - Polarization (ISO 12005:2003)Lasers et quipements associ
10、s aux lasers - Mthodesdessai des paramtres du faisceau laser - Polarisation(ISO 12005:2003)Laser und Laseranlagen - Prfverfahren frLaserstrahlparameter - Polarisation (ISO 12005:2003)This European Standard was approved by CEN on 21 February 2003.CEN members are bound to comply with the CEN/CENELEC I
11、nternal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member
12、.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the
13、 national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE
14、NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2003 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 12005:2003 ECORRECTED 2003-07-02ForewordThis document (EN ISO 12005:2003) has
15、been prepared by Technical Committee ISO/TC 172“Optics and optical instruments“ in collaboration with Technical Committee CEN/TC 123 “Lasersand laser-related equipment“, the secretariat of which is held by DIN.This European Standard shall be given the status of a national standard, either by publica
16、tion ofan identical text or by endorsement, at the latest by October 2003, and conflicting nationalstandards shall be withdrawn at the latest by October 2003.This document supersedes EN ISO 12005:1999.According to the CEN/CENELEC Internal Regulations, the national standards organizations ofthe follo
17、wing countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland andthe United Kingdom.Endorsement noticeTh
18、e text of ISO 12005:2003 has been approved by CEN as EN ISO 12005:2003 without anymodifications.NOTE Normative references to International Standards are listed in Annex ZA (normative).EN ISO 12005:2003INTERNATIONALSTANDARDISO12005Second edition2003-04-01Reference numberISO 12005:2003(E)Lasers and la
19、ser-related equipment Test methods for laser beam parameters PolarizationLasers et quipements associs aux lasers Mthodes dessai des paramtres du faisceau laser PolarisationEN ISO 12005:2003ISO :50021(3002)Eiiid FDPscalimerThFDP si fam eliy ctnome niat deddebyepfa.sec In cacnadrociw eth sebodA snecil
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24、22 14 0 94774 9Eam-il ocpyrithgios.ogrWeb wwwi.soo.rgEN ISO 12005:2003iiiContents Page1 Scope 12 Normative references 13 Terms and definitions 14 Test method for state of polarization . 34.1 Principle of measurement 34.2 Equipment arrangement . 34.3 Components 44.4 Test procedure . 54.5 Analysis of
25、the results 65 Test report 7Annex A (informative) Complete description of the polarization status of a monochromaticlaser beam 9Bibliography . 11EN ISO 12005:2003ivForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies(ISO member bodie
26、s). The work of preparing International Standards is normally carried out through ISOtechnical committees. Each member body interested in a subject for which a technical committee has beenestablished has the right to be represented on that committee. International organizations, governmental andnon-
27、governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the InternationalElectrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
28、The main task of technical committees is to prepare International Standards. Draft International Standardsadopted by the technical committees are circulated to the member bodies for voting. Publication as anInternational Standard requires approval by at least 75 % of the member bodies casting a vote
29、.Attention is drawn to the possibility that some of the elements of this document may be the subject of patentrights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 12005 was prepared by Technical Committee ISO/TC 172, Optics and optical instruments, Subcommittee
30、SC 9, Electro-optical systems.This second edition cancels and replaces the first edition (ISO 12005:1999), which has been technicallyrevised.EN ISO 12005:2003vIntroductionThis International Standard specifies a relatively quick and simple method, requiring minimum equipment, fordetermining the state
31、 of polarization of a laser beam.This method is for well-polarized laser beams, including those emitted by lasers with a high divergence angle.However, if more completeness in the determination of the polarization status is required, the use of a moresophisticated analysing device is necessary. Alth
32、ough not within the scope of this International Standard, theprinciple of operation of such devices is given in Annex A, together with a description of the Stokes parameterswhich are needed in that case.EN ISO 12005:2003.iv ANRETNIITOTS LANDNADRA ISO 00213002:5)E(Lasers and laser-related equipment T
33、est methods for laser beam parameters Polarization1ScopeThis International Standard specifies a method for determining the polarization status and, whenever possible,the degree of polarization of the beam from a continuous wave (cw) laser. It can also be applied to repetitivelypulsed lasers, if thei
34、r electric field vector orientation does not change from pulse to pulse.This International Standard also specifies the method for determining the direction of the plane of oscillation inthe case of linearly polarized (totally or partially) laser beams. It is assumed that the laser radiation is quasi
35、-monochromatic and sufficiently stable for the purpose of the measurement.The knowledge of the polarization status can be very important for some applications of lasers with a highdivergence angle, for instance when the beam of such a laser shall be coupled with polarization dependentdevices (e.g. p
36、olarization maintaining fibres). This International Standard also specifies a method for thedetermination of the state of polarization of highly divergent laser beams, as well as for the measurement ofbeams with large apertures.2 Normative referencesThe following referenced documents are indispensab
37、le for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenced document(including any amendments) applies.ISO 11145:2001, Optics and optical instruments Lasers and laser-related equipment Vocabulary andsymbol
38、sIEC 61040:1990, Power and energy measuring detectors, instruments and equipment for laser radiationCIE 59-1984, Definitions and Nomenclature, Instrument Polarization3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 11145:2001, IEC 61040:1990,CIE 59-198
39、4 and the following apply.3.1polarizationrestriction of oscillations of the electric field vector to certain directionsNOTE This is a fundamental phenomenon which can be explained by the concept that electromagnetic radiation is atransverse wave motion, i. e. the vibrations are at right angles to th
40、e direction of propagation. It is customary to considerthese vibrations as being those of the electric field vector.3.2state of polarizationclassification of polarization as linear, random, circular, elliptical or unpolarizedEN ISO 12005:20031 3.3direction of polarizationdirection of the electric fi
41、eld vector of an electromagnetic wave3.4plane of polarizationplane containing the electric field vector and the direction of propagation of the electromagnetic radiation3.5ellipticityg162elliptically polarized radiationg178 ratio of the minor semiaxis of the ellipse to the major semiaxis of the elli
42、pseNOTE The ellipse is described by the motion of the terminal point of the electric field vector in a transverse plane to thedirection of radiation propagation (see Annex A).3.6ellipticity angleangle whose tangent is the ellipticityNOTE The ellipticity angle is constrained to . When the polarizatio
43、n is circular and whenthe polarization is linear (see Annex A).3.7azimuthangle between the major axis of the instantaneous ellipse and a reference axis perpendicular to the direction ofpropagationNOTE See Annex A.3.8linear polarizeroptical device whose output is linearly polarized, without regard to
44、 the status and degree of polarization of theincident radiation3.9extinction ratiog162linear polarizerg178 measure of the quality of the linear polarizerNOTE If perfectly linearly polarized radiation is incident on a polarizer, then the extinction ratio of the polarizer is given bywhereis the maximu
45、m transmittance (reflectance)is the minimum transmittance (reflectance) of power (energy) through (of) the linear polarizer.3.10quarter wave plateoptical device which resolves an incident totally polarized beam of radiation into two orthogonally polarizedcomponents and introduces a phase shift betwe
46、en themb/abaepsilon145lessorequalslantepsilon1lessorequalslant+45epsilon1=45epsilon1= 0extinction ratio =minmaxorminmaxmax(max)min(min)90EN ISO 12005:20032 3.11stokes parametersset of four real quantities, which completely describe the polarization state of monochromatic or quasi-monochromatic radia
47、tionNOTE The parameters are, collectively, known as the Stokes vector, a vector (see Annex A for a completedescription and formulae for Stokes parameters).4 Test method for state of polarization4.1 Principle of measurementThe first test for laser beam polarization determines whether the beam is line
48、arly polarized. This involvesrecording the maximum and minimum levels of the transmitted radiation while the angular orientation of thelinear polarizer is varied, as shown in Figure 1.If the beam is not linearly polarized (according to the criteria given in 4.5), it is tested for elliptical or circularpolarization. For this test the beam is measured after transmission by both a quarter-wave plate and a linearpolarizer, as shown in Figure 2.If not in either of these states, it is only partially polarized or unpolarized.4.2 Equipment arrangement4.2.1 GeneralThe experimental set-up is
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