1、BSI Standards PublicationBS ISO 19055:2015Microscopes Minimumrequirements for binoculartubesBS ISO 19055:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 19055:2015.The UK participation in its preparation was entrusted to TechnicalCommittee CPW/172, Optics
2、and Photonics.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2015. Published b
3、y BSI StandardsLimited 2015ISBN 978 0 580 84940 4ICS 37.020Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 September 2015.Amendments issued since publicationDat
4、e Text affectedBS ISO 19055:2015 ISO 2015Microscopes Minimum requirements for binocular tubesMicroscopes Exigences minimales pour tubes binoculairesINTERNATIONAL STANDARDISO19055First edition2015-09-01Reference numberISO 19055:2015(E)BS ISO 19055:2015ISO 19055:2015(E)ii ISO 2015 All rights reservedC
5、OPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet,
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7、rgBS ISO 19055:2015ISO 19055:2015(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Requirements 2Annex A (normative) Test methods for binocular tubes . 4 ISO 2015 All rights reserved iiiContents PageBS ISO 19055:2015ISO 19055:2015(E)ForewordISO (the International Organiza
8、tion 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
9、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.The
10、 procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the ed
11、itorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn 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. Details of any patent r
12、ights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an e
13、xplanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this d
14、ocument is ISO/TC 172, Optics and photonics, Subcommittee SC 5, Microscopes and endoscopes.iv ISO 2015 All rights reservedBS ISO 19055:2015INTERNATIONAL STANDARD ISO 19055:2015(E)Microscopes Minimum requirements for binocular tubes1 ScopeThis International Standard specifies the minimum requirements
15、 regarding image quality and viewing ergonomics for binocular tubes for compound microscopes when used with eyepieces as specified by the manufacturer. This International Standard makes a distinction between binocular tubes with and without dioptre adjustment.2 Normative referencesThe following docu
16、ments, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 15227:2000, Optics and
17、 optical instruments Microscopes Testing of stereomicroscopes3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1interpupillary distanceIPDdistance between the exit pupils of the left and right optical system3.2optical axisaxis given by the central
18、ray of the pencil exiting the eyepiece for an object point in the centre of the object plane3.3convergencedescribes the situation when the optical axis for the left and right optical systems meet at a position further away from the eye than the eyepieceNote 1 to entry: Binocular tubes for compound m
19、icroscopes usually have parallel optical axes for the left and right optical systems.3.4imaging rotationorientation of the image with respect to the optical axis as the axis of rotation3.5relative brightnessbrightness of the darker of the two optical systems divided by the brightness of the lighter
20、of the two optical systemsNote 1 to entry: The requirement in Table 3 shall be fulfilled for any state of polarization.Note 2 to entry: It is expressed in percentage (%). ISO 2015 All rights reserved 1BS ISO 19055:2015ISO 19055:2015(E)4 RequirementsThe requirements specified in Tables 1, 2, and 3 ar
21、e the minimum requirements for opto-mechanical and radiation specifications of binocular tubes.Table 1 makes a distinction between tubes for general use and high-performance tubes.NOTE Tubes for general use fulfil the basic criteria for microscopic applications. High-performance tubes provide increa
22、sed viewing ergonomics when used over prolonged time periods.The values shall be met by any individual tube which claims compliance with this International Standard.For the specified minimum adjustment range for IPD, all requirements shall be met.Tubes with dioptre adjustment shall meet the requirem
23、ents in Table 1, 2, and 3.Tubes without dioptre adjustment shall meet the requirements in Table 1 and Table 3.Table 1 Opto-mechanical requirementsCriterionRequirement for general useRequirement for high performance tubesTest methodMinimum adjustment range for IPD 55 mm to 75 mm A.1Indication error o
24、f IPD scale 1 mm A.2Difference in optical axis between left and right optical systems Vertical 15ISO 15227:2000, 6.3.3.1HorizontalConvergence 45Divergence 10 3Difference in centres between left and right imageVertical 0,20 mmA.3HorizontalConvergence0,40 mmDivergenceDifference in axial position betwe
25、en left and right image0,3 mm A.4Difference in imaging rotation between left and right image2ISO 15227:2000, 6.3.5Difference in exit pupil position between left and right optical system1 mm A.52 ISO 2015 All rights reservedBS ISO 19055:2015ISO 19055:2015(E)Table 2 Additional opto-mechanical requirem
26、ents for tubes with dioptre adjustmentCriterion Requirement Test methodMinimum range of dioptre adjustment 5 D to +5 DISO 15227:2000, 6.3.13Difference in axial position between left and right image at 0 D 0,5 mm A.6Table 3 Radiation requirementsCriterion Requirement Test methodRelative brightness 65
27、 % A.7 ISO 2015 All rights reserved 3BS ISO 19055:2015ISO 19055:2015(E)Annex A (normative) Test methods for binocular tubesA.1 Minimum adjustment range for IPDThe IPD shall be measured as the distance of the centres of the exit pupils of the two eyepieces.A.2 Indication error of IPD scaleThe indicat
28、ion error is the difference between the quantity measured in A.1 and the marked IPDs on the binocular tube.A.3 Difference in centres between left and right imageA reference eyepiece with crosshairs is inserted into the left eyepiece sleeve and a specimen with crosshairs is focused. The specimen is l
29、aterally adjusted so the crosshairs of the eyepiece and the specimen are aligned.The reference eyepiece is then inserted into the right sleeve and the distance between the eyepiece crosshairs and the specimen crosshairs in vertical and horizontal direction is measured.A.4 Difference in axial positio
30、n between left and right imageA focusable reference eyepiece set to its nominal focus position is inserted in the left eyepiece sleeve and a specimen is focused.The reference eyepiece is then inserted into the right sleeve. The eyepiece is axially adjusted until the specimen is focused and the resul
31、ting axial adjustment is measured.A.5 Difference in exit pupil position between left and right optical systemThe exit pupil position shall be measured perpendicular to the surface defined by the eyepiece location flange of the left optical system.For tubes with dioptre adjustment, this quantity shal
32、l be measured at 0 D at the dioptre scale.A.6 Difference in axial position between left and right image at 0 DThe eyepiece sleeve with dioptre adjustment is set to 0 D and the same measurement as in A.4 is performed.A.7 Relative brightnessThe brightness shall be measured with a light source of type
33、D65 located in the nominal entrance pupil of the tube. The light source shall be of circular shape and be at least 8 mm in diameter. The measurements shall be carried out in the exit pupils of the eyepieces.4 ISO 2015 All rights reservedBS ISO 19055:2015BS ISO 19055:2015ISO 19055:2015(E) ISO 2015 Al
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