1、BRITISH STANDARD BS EN ISO 11551:2003 Incorporating Corrigendum No.1 Optics and optical instruments Lasers and laser-related equipment Test method for absorptance of optical laser components The European Standard EN ISO 11551:2003 has the status of a British Standard ICS 31.260 BS EN ISO 11551:2003
2、This British Standard was published under the authority of the Standards Policy and Strategy Committee on 6 January 2004 BSI 31 March 2004 ISBN 0 580 43164 9 National foreword This British Standard is the official English language version of EN ISO 11551:2003. It is identical with ISO 11551:2003. It
3、 supersedes BS EN ISO 11551:1997 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee CPW/172, Optics and optical instruments, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretar
4、y. Cross-references The British Standards which implement international or European publications referred 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
5、 or of British Standards Online. This publication does not purport to include all the necessary provisions 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 t
6、ext; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front c
7、over, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to v, a blank page, pages 1 to 13, the Annex ZA page, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Ame
8、ndments issued since publication Amd. No. Date Comments 15065 Corrigendum No.1 31 March 2004 Corrected EN ISO Foreword page and incorporation of Annex ZA.EUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO11551 December2003 ICS31.260 SupersedesENISO11551:1997 Englishversion Opticsandopticalinstrume
9、ntsLasersandlaserrelated equipmentTestmethodforabsorptanceofopticallaser components(ISO11551:2003) OptiqueetinstrumentsdoptiqueLasersetquipements associsauxlasersMthodedessaidufacteur dabsorptiondescomposantsoptiquespourlasers(ISO 11551:2003) OptikundoptischeInstrumenteLaserundLaseranlagen Prfverfah
10、renfrdenAbsorptionsgradvonoptischen Laserkomponenten(ISO11551:2003) ThisEuropeanStandardwasapprovedbyCENon1December2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatel
11、istsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguage
12、andnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ite
13、d Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO11551:2003EINESO11:1552003(E) 2 CORRECTED200
14、40303 Foreword Thisdocument(ENISO11551:2003)hasbeenpreparedbyTechnicalCommitteeISO/TC172 “Opticsandopticalinstruments“incollaborationwithTechnicalCommitteeCEN/TC123“Lasers andlaserrelatedequipment“,thesecretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherb
15、ypublicationof anidenticaltextorbyendorsement,atthelatestbyJune2004,andconflictingnational standardsshallbewithdrawnatthelatestbyJune2004. ThisdocumentsupersedesENISO11551:1997. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsof thefollowingcountriesareboundtoimplementt
16、hisEuropeanStandard:Austria,Belgium,Czech Republic,Denmark,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy, Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,Switzerlandand theUnitedKingdom. Endorsementnotice ThetextofISO11551:2003hasbeenapprovedbyCENasENISO11551:2003wit
17、houtany modifications. NOTENormativereferencestoInternationalStandardsarelistedinAnnexZA(normative). ENISO11551:2003 Reference number ISO 11551:2003(E) OSI 3002INTERNATIONAL STANDARD ISO 11551 Second edition 2003-12-01 Optics and optical instruments Lasers and laser-related equipment Test method for
18、 absorptance of optical laser components Optique et instruments doptique Lasers et quipements associs aux lasers Mthode dessai du facteur dabsorption des composants optiques pour lasers ENISO11551:2003IS:15511 O3002(E) DPlcsid Fremia ihTs PDF file mya ctnoian emdebt dedyfepcaes. In ccacnadrow eitA h
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23、T. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mial coirypthgis.o gro We bwww.is.o groii ISO 3002 Allr ihgtsser edevrENISO11551:2003IS:15511 O3002(E) I SO 3002 All irhgts seredevr iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Normative references . 1 3 Terms and definitions. 1 4 Symbols and
24、 units of measure 2 5 Preparation of test sample and measuring arrangement . 2 6 Characteristic features of the laser radiation 3 7 Test procedure 4 8 Evaluation 5 9 Test report . 7 Annex A (informative) Effects changing absorptance 9 Annex B (informative) Influence of signal distortions 10 Annex C
25、(informative) Algorithm for parameterizing the temperature data . 13 ENISO11551:2003ISO 11551:2003(E) iv I SO 3002 All irhgts seredevrForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing In
26、ternational 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
27、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 2. The main task of techn
28、ical committees is to prepare International Standards. 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. Attention is drawn
29、 to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 11551 was prepared by Technical Committee ISO/TC 172, Optics and photonics, Subcommittee SC 9, Electro-optical syst
30、ems. This second edition cancels and replaces the first edition (ISO 11551:1997), which has been technically revised. ENISO11551:2003ISO 11551:2003(E) I SO 3002 All irhgts seredevr vIntroduction To characterize an optical component, it is important to know its absorptance. When radiation impinges up
31、on a component, a part of that radiation is absorbed, increasing the temperature of the component. In this International Standard only the part of the absorbed power/energy that is converted into heat is measured. If enough energy is absorbed, the optical properties of the component may be changed,
32、and the component may even be destroyed. Absorptance is the ratio of the radiant flux absorbed to the radiant flux of the incident radiation. In the procedures described in this International Standard, the absorptance is determined calorimetrically as the ratio of power or energy absorbed by the com
33、ponent to the total power or energy, respectively, impinging upon the component. The assumption is made that the absorptance of the test sample is constant within the temperature fluctuations experienced by the component during the measurement and is independent of both the position of the irradiati
34、ng beam on the sample surface and the power density of the impinging radiation. For several bulk materials like CdTe, the absorptance depends on the position of the irradiating beam on the sample surface. Several infrared materials exhibit a strong dependence of absorptance on temperature, especiall
35、y at high temperatures. ENISO11551:2003INTENRATIONAL TSANDADR IS:15511 O3002(E)I SO 3002 All irhgts seredevr 1Optics and optical instruments Lasers and laser-related equipment Test method for absorptance of optical laser components 1 Scope This International Standard specifies procedures and techniq
36、ues for obtaining comparable values for the absorptance of optical laser components. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of t
37、he referenced document (including any amendments) applies. ISO 31-6:1992, Quantities and units Part 6: Light and related electromagnetic radiations ISO 11145:2001, Optics and optical instruments Lasers and laser-related equipment Vocabulary and symbols ISO 14644-1:1999, Cleanrooms and associated con
38、trolled environments Part 1: Classification of air cleanliness 3 Terms and definitions For the purposes of this document, the terms and definitions in ISO 11145 and ISO 31-6 and the following apply. 3.1 absorptance ratio of the radiant flux absorbed to the radiant flux of the incident radiation NOTE
39、 The definition of absorptance used for this international Standard is limited to absorptance processes which convert the absorbed energy into heat. For certain types of optics and radiation, additional non-thermal processes may result in absorption losses which will not be detected by the test proc
40、edure described here (see Annex A). ENISO11551:20031IS:15511 O3002(E) 2 I SO 3002 All irhgts seredevr4 Symbols and units of measure Table 1 Symbols and units of measure Symbol Term Unit c iThermal capacity of test sample, holder, etc. J/(kgK) d x , d yBeam width on test sample mm m iMass of test sam
41、ple, holder, etc. kg P cw power W P avAverage laser power for continuous pulse mode operation W P pkTypical peak power for repetitive pulse mode operation W t BDuration of irradiation s t Time interval s T ambAmbient temperature K T Temperature difference K Absorptance 1 Angle of incidence Rad Therm
42、al loss coefficient 1/s Wavelength nm 5 Preparation of test sample and measuring arrangement Storage, cleaning and the preparation of the test samples are carried out in accordance with the manufacturers instructions for normal use. The environment of the testing place consists of dust-free filtered
43、 air with less than 50 % relative humidity. The residual dust is reduced in accordance with cleanroom class 7 as defined in ISO 14644-1:1999. In this connection, an environment free from draughts is very important in order to keep thermal disturbances and heat loss by convection as small as possible
44、. Measurements in ambient atmosphere and vacuum may have different influences on the measured absorptance. A laser shall be used as the radiation source. To keep errors as low as possible, the laser power chosen for measurements is as high as possible but without causing any deterioration to the com
45、ponent. Wavelength, angle of incidence and state of polarization of the laser radiation used for the measurement shall correspond to the values specified by the manufacturer for the use of the test sample. If ranges are accepted for these three quantities, any combination of wavelength, angle of inc
46、idence and state of polarization may be chosen from those ranges. The sample is mounted in a suitable holder. The thermal sensors are either connected directly to the sample surface, or attached to the sample holder. Good thermal contact between sensor and sample or between holder and sample shall b
47、e achieved. Precaution shall be taken to avoid a possible drop in thermal conductance between temperature sensor and test sample. In order to increase the precision of the measurements, the sample should be mounted inside a chamber designed for thermal shielding, with apertures for the laser beam. S
48、pecial attention shall be given to ensure that the temperature measurement itself does not cause a change of the sample temperature. ENISO11551:20032IS:15511 O3002(E) I SO 3002 All irhgts seredevr 3Suitable diaphragms should be placed in the beam path in front of and behind the test sample to ensure that only
