ISO INTERNATIONAL STANDARD 15227 First edition 2000-04-01 Optics and optical instruments Microscopes Testing of stereomicroscopes Optique et instruments d'optique - Microscopes Essai des steréomicroscopes Reference number ISO 15227:2000(E) ISO @ ISO 2000 ISO 15227:2000(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ?ISO2000 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 either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56·CH-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 734 10 79 E-mail [email protected] Web www.iso.ch Printed in Switzerland ii @IsO2000-All rightsreserved ISO 15227:2000(E) Contents Page Foreword. .iv 1 Scope. 2 Normative references . 3 Terms and definitions .. 4 Accuracy of testing.... 5 Test conditions .... 5.1 Total visual magnification (Mrot vis) . 5.2 Difference in total visual magnification between left and right optical systems .... 5.3 Difference in axes between left and right optical systems.. 5.4 Difference in the centres of the image fields between left and right optical systems... 5.5 Difference in imaging rotations between right and left images..... 5.6 Axial shift of object plane by magnification change .. 5.7 Lateralshiftof imageplanebymagnificationchange. 5.8 Focus difference between left and right optical systems. 5.9 Resolutionforthehighest magnificationatthecentreofthefield.. 5.10 Difference in exit pupil heights between left and right optical systems .. 5.11 Minimum range for interpupillary distance. 5.12 Calibrationerrorifadioptrescaleisused 5.13 Minimum eyepiece dioptre adjustment range.. 6 Test methods.. 6.1 Apparatus.. 6.2 Apparatus configuration .... 6.3 Test procedures. Bibliography Iso2000-All rightsreserved ii ISO 15227:2000(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO memberbodies).Theworkof preparingInternationalStandardsisnormallycarried outthroughISOtechnica Commission(lEC)onallmattersofelectrotechnicalstandardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. sO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 15227 was prepared by Technical Committee ISO/TC 172, Optics and optical instruments, Subcommittee S 5, Microscopes and endoscopes. iv @ ISO 2000 -All rights reserved INTERNATIONAL STANDARD ISO 15227:2000(E) Optics and optical instruments Microscopes Testing of stereomicroscopes 1 Scope This International Standard specifies test conditions and recommended test methods to ensure the minimum ISO 11884-2. The test methods specified in this International Standard are recommended, but use of other test methods is permitted if the same results ar