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1、INTERNATIONAL STANDARD ISO 11380 First edition 1994-10-01 Optics and Optical instruments - Ophthalmic optics - Formers Op tique et instrumen ts d optique - Optique oph talmique - Gabarits Refet-ence numbes ISO 11380:1994(E) Copyright International Organization for Standardization Provided by IHS und
2、er license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 02:03:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 11380:1994(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national S
3、tandards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Esch member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International
4、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. Draft International Standards adopted by the technical committees a
5、re 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. International Standard ISO 11380 was prepared by Technical Committee lSO/TC 172, Optics and optica! instruments, Subcommittee SC 8, Oph thal
6、mic op tics. 0 ISO 1994 All rights reserved. Unless otherwise specified, no patt of this publication may be reproduced or utilized in any form or by any means, electronie or mechanical, including photocopying and microfilm, without Permission in writing from the publisher. International Organization
7、 for Standardization Case Postale 56 l CH-l 211 Geneve 20 l Switzerland Printed in Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 02:03:38 MDTNo reproduction or netw
8、orking permitted without license from IHS -,-,- INTERNATIONAL STANDARD 0 ISO ISO 11380:1994(E) Optics and Optical instruments - Ophthalmic optics - Formers 1 Scope This International Standard specifies the character- istics of formers which are used in edging machines to edge lenses designed for ins
9、ertion into spectacle frames. lt is not applicable to separate formers required for supplementary treatment of lenses, for example facetting. 2 Types of former Lens formers shall be classed by lens size (see 2.1) or aperture size (see 2.2). Material and thickness which are dimensionally stable shall
10、 be selected. 2.1 Lens size Lens size formers are formers which are of the same size and shape as the spectacle lenses to be pro- duced. They may be furnished so as to provide a former for each size in the range of a particular frame style (System a), or may be furnished in one particular size inten
11、ded for use with a specified range of sizes (both larger and smaller) (System b). 2.2 Aperture size Aperture size formers are formers which are of the same shape as the spectacle lenses to be produced, but which are smaller than the finished lens size by an amount equivalent to a nominal bevel. They
12、 shall be capable of being fitted firmly, by hand, into the aperture of the specified frame size without altering the size or shape of the rim, as designed, and without gaps between the rim and the former being discernable with normally corrected Vision. 3 Dimensional requirements All dimensions and
13、 tolerantes given in figure 1 shall aPPlY* The dimensional differente between two formers of the same nominal size and shape shall not at any corresponding Point, on the circumference, exceed 0,2 mm. NOTE 1 The standardized System of holes is based on the Systems used worldwide, as shown in figure2.
14、 The System shown in figure2a) is considered the most suitable for future development. 4 Marking Formers shall be marked with at least the following information: a) manufacturer s or supplier s identification; b) model identification; c) letter “N” in combination with a boxing Symbol to indicate the
15、 nasal side of the formers. Formers of the type specified in 2.1 shall in addition be marked with the horizontal boxed lens size, in millimetres. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Res
16、ale, 04/26/2007 02:03:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 11380:1994(E) 0 ISO Formers of the type specified in 2.2 shall in addition be marked with the horizontal boxed lens size, in millimetres, that it it is intended to reproduce, and shall also carry t
17、he words “aperture size”. The indication of the centreline and of the vertical axis with short marks on one or on both sides of the for- mers is optional. However, if marks are applied they shall not vary more than + 1” from the nominal direc- tion. See figure3. R 1,55 -, 0 0 - tl 2) 7 00 r- - B -9
18、:g 0 0 + I M - Figure 1 - Dimensions and tolerantes Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 02:03:38 MDTNo reproduction or networking permitted without license from IHS -
19、,-,- ISO 11380:1994(E) 94 *0,025 - 2 x Q, 4,76 *0,025 +0,025 / 2 x 2,l 0 2 x 1,98 *0,05 J c 26,98 *O,l a) b) 2 x # 3,l - +0,2 # 12,l 0 - 7,94 *0,025 Figure 2 - Standardized System of holes Locating marks Spate for manufacturer s or supplier s identification Spate for dimensional information / Spate
20、for model identification Figure 3 - Preferred locations of markings 3 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 02:03:38 MDTNo reproduction or networking permitted without
21、license from IHS -,-,- This page intentionally left blank Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 02:03:38 MDTNo reproduction or networking permitted without license from
22、 IHS -,-,- This page intentionally lef? blank Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 02:03:38 MDTNo reproduction or networking permitted without license from IHS -,-,- I
23、SO 11380:1994(E) ICS 11.040.70 Descriptors: Optical equipment, ophthalmic optics, eyeglasses, correctwe lenses, Patterns, specifications, dimensions, marking. Price based on 3 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 02:03:38 MDTNo reproduction or networking permitted without license from IHS -,-,-
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