ISO-8598-1996.pdf
《ISO-8598-1996.pdf》由会员分享,可在线阅读,更多相关《ISO-8598-1996.pdf(9页珍藏版)》请在三一文库上搜索。
1、STD-IS0 8598-ENGL L99b Li851903 07q2bbl TBO INTERNATIONAL STANDARD IS0 8598:1996 TECHNICAL CORRIGENDUM 1 Published 1998-05-01 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MErrmYHAPOIIHAR OPTAHH3AUHR Il0 CTAHMPTM3AUHH ORGANISATION INTERNATIONALE DE NORMALISATION Optics and optical instruments - Foc
2、imeters TECHNICAL CORRIGENDUM 1 Optique et instruments doptique - Frontofocomtres RECTIFICATIF TECHNIQUE 1 Technical Corrigendum 1 to International Standard IS0 8598:1996 was prepared by Technical Committee ISO/TC 172, Optics and optical instruments, Subcommittee SC 7, Ophthalmic optics and instrume
3、nts. This material is reproduced from IS0 documents under International Organization for Standardization (ISO) Copyright License number IHSllCC11996. Not for resale. No part of these IS0 documents may be reproduced in any form, electronic retrieval system or otherwise, except as allowed in the copyr
4、ight law of the country of use, or with the prior written consent of IS0 (Case postale 56,1211 Geneva 20, Switzerland, Fax +41 22 734 10 79), IHS or the IS0 Licensors members. Page 2 Subclause 4.4 Replace the second sentence with the following text: Translational movements of the lenses on the lens
5、support of not less than 30 mm in a direction perpendicular to the optical axis and to the adjusting rail shall be possible, starting from not more than 1 O mm below the optical axis of the instrument (see figure 1). “ l in which the phrase . starting from more than 10 mm below . “ has been correcte
6、d to “ . starting from not more than 10 mm below . n. ICs 11.040.70 Ref. No. IS0 8598:1996/Cor.l:1998(E) Descriptors: optics, opticai equipment, optical measuring instruments, frontofocometers, specifications, manufacturing requirements, accuracy, tests. (B IS01998 Printed i n Switzerland Copyright
7、International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 01:30:41 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 8598 9b m 4851903 0669386 996 W INTERNATIONAL STANDAR
8、D IS0 First edition 1996-08-01 Optics and optical instruments - Focimeters Optique et instruments doptique - frontofocomtres Reference number IS0 8598:1996(E) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/997254500
9、1 Not for Resale, 04/25/2007 01:30:41 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 8598:1996(E) IS0 8598 9b W 4851903 0669387 822 Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodi
10、es). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be rep- resented on that committee. International organizations, governmental an
11、d non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bo
12、dies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 8598 was prepared by Technical Committee ISO/TC 172, Optics and optical instruments, Subcommittee SC 7, Oph- thalmic, endoscopic, metrological
13、instruments and test methods. O IS0 1996 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. Internati
14、onal Organization for Standardization Case postale 56 CH-121 1 Genve 20 Switzerland Printed in Switzerland II Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 01:30:41 MDTNo repro
15、duction or networking permitted without license from IHS -,-,- IS8 8598 96 m 4853903 0669388 7 b m INTERNATIONAL STANDARD Q IS0 IS0 8598:1996(E) Optics and optical instruments - Focimeters 1 Scope This International Standard specifies requirements for continuously indicating focimeters and digitally
16、 rounding focimeters with which the vertex powers and prismatic powers of spherical and astigmatic lenses, including lenses mounted in frames and contact lenses, can be measured and with which lenses can be orientated and marked. NOTE 1 For the measurement of vertex powers of contact lenses, see IS0
17、 9337:-11, Optics and optical instruments - Contact lenses - Determination of back vertex power. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions ind
18、icated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid I
19、nternational Standards. IS0 7944:-2), Optics and optical instruments - Reference wavelengths. IS0 8429:1986, Optics and optical instruments - Ophthalmology - Graduated dial scale. IS0 9342:-1), Optics and optical instruments - Test lenses for the calibration of focimeters. 3 Definitions For the purp
20、oses of this International Standard, the following definitions apply. 3.1 focimeter: Instrument that is used to measure vertex powers and prismatic effects of spectacle and contact lenses, to orientate and mark uncut lenses, and to verify the correct mounting of lenses in spec- tacles frames. 3.2 co
21、ntinuously indicating focimeter: Focimeter with a continuous scale. 3.3 digitally rounding focimeter: Focimeter which displays measured values rounded to the nearest incremental value. 3.4 lens support: Aperture on the instrument against which the lens or the contact lens is placed for measurement.
22、NOTE 2 The focimeter measures the vertex power rela- tive to the surface placed against the lens support. 3.5 adjusting rail: Movable rail or bar used as the reference axis for spectacles during measurement, which is aligned perpendicularly to the optical axis of the focimeter and parallel to the ax
23、is direction O“ to 180“. NOTE 3 Also called the lens table or frame rest. 3.6 principal meridians: The two meridians of an astigmatic power lens (see 3.1 O) containing the optical axis; one of the meridians has maximum refractive 1) To be published. 2) To be published. (Revision of IS0 7944:1984) 1
24、Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 01:30:41 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 8598 96 = 4853903 Ob69389 bT5 I I VI 7 IS0
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ISO 8598 1996
链接地址:https://www.31doc.com/p-3779148.html