1、BRITISH STANDARD BS 7012-0: 1989 Light microscopes Part 0: General introduction UDC 681.723:.001.8BS7012-0:1989 This British Standard, having been prepared under the directionof the Laboratory Apparatus Standards Committee,was published underthe authority of the BoardofBSI and comes into effect on 2
2、8February1989 BSI 09-1999 The following BSI references relate to the work on this standard: Committee reference LBC/33 Draft for comment 87/52975 DC ISBN 0 580 16803 4 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Laboratory Apparatus
3、Standards Committee (LBC/-) to Technical Committee LBC/33 upon which the following bodies were represented: British Microscopes Manufacturers Association Department of Health and Social Security Department of Trade and Industry (National Physical Laboratory) Flat Glass Manufacturers Association Medi
4、cal Research Council Royal Microscopical Society Science Museum Amendments issued since publication Amd. No. Date of issue CommentsBS7012-0:1989 BSI 09-1999 i Contents Page Committees responsible Inside front cover Foreword ii Table 1 Summary of the contents of BS 7012 1 Publications referred to Ins
5、ide back coverBS7012-0:1989 ii BSI 09-1999 Foreword This Part of BS7012 has been prepared under the direction of the Laboratory Apparatus Standards Committee. It explains the structure of BS7012. For many years the UK has participated in the work of Subcommittee5, Microscopes, of Technical Committee
6、 ISO/TC172, Optics and optical instruments, of the International Organization for Standardization (ISO). It is now intended to implement the standards produced by, or in preparation in, ISO/TC172 as dual-numbered British Standards, except in those cases where current UK practice prevents their adopt
7、ion. The International Standards relating to light microscopes and components will be published as Parts of BS7012 and the International Standards relating to consumable accessories as Parts of BS7011. Table 1 details the Parts of BS7012 currently available or in preparation. When Part4 of BS7012 is
8、 published it will supersede BS3569:1962 which will then be withdrawn. In preparing this standard, the Technical Committee gave careful consideration to use of the term “light microscopes”, because it was recognized that in some circumstances it could be wrongly interpreted as meaning “light-weight
9、microscopes”. Use of the term “optical microscopes” was rejected as this includes electron microscopes, which are not within the scope of BS7012. In choosing the term “light microscopes” account was taken of the use of the term within the industry and the terminology recommended by the Royal Microsc
10、opical Society. For the purposes of this standard light microscopes are those which use light in the visible range (i.e.wavelengths of400nm to760nm) as the illuminating agent. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are re
11、sponsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 and 2, an inside back cover and a back cover. This standard has
12、 been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS7012-0:1989 BSI 09-1999 1 Table 1 Summary of the contents of BS 7012 Part Subject Corresponding International Standard Part 0 General introduction Pa
13、rt 1 Preferred values for magnifying power a Part 2 Description of a reference system used for polarized light microscopy a ISO 8576 a Part 3 Specification for connecting optical dimensions for tube length160mm a Part 4 Specification for microscope objective and nosepiece screw threads ISO 8038 Part
14、 5 Specification for connection dimensions of tube slides and tube slots ISO 8040 Part 6 Specification for spectral filters a Part 7 Specification for the marking of objectives and oculars a ISO 8578 a Part 8 Specification for graticules for oculars a Part 9 Specification for interfacing connection
15、a a In preparation.2 blankBS7012-0:1989 BSI 09-1999 Publications referred to BS 7011, Consumable accessories for light microscopes 1) . See alsoTable 1. 1) Referred to in the foreword only.BS 7012-0: 1989 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent
16、national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions BritishStandards are updated by amendment or revision. Users of BritishStandards should make sure that they possess
17、the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this BritishStandard would inform the Secretary of the technical committee responsible, the identity of
18、which can be found on the inside front cover. Tel:02089969000. Fax:02089967400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standard
19、s publications should be addressed to Customer Services. Tel:02089969001. Fax:02089967001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as BritishStandards, unless otherwise requested. Information on standards
20、BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Cent
21、re. Tel:02089967111. Fax:02089967048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel:02089967002. Fax:02089967001. Copyrigh
22、t Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in a
23、ny form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel:02089967070.
