1、BRITISH STANDARD BS 7012-6: 1998 ISO 8577:1997 Light microscopes Part 6: Specification for spectral filters ICS 37.020BS7012-6:1998 This British Standard, having been prepared under the directionof the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board
2、 and comes into effect on 15April1998 BSI 04-1999 ISBN 0 580 29654 7 National foreword This British Standard reproduces ISO8579:1997 and implements it as the UK national standard. It supersedes BS7012-6:1990 which is withdrawn. The UK participation in its preparation was entrusted to Technical Commi
3、ttee LB1/33, Microscopes, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European de
4、velopments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Ca
5、talogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for thei
6、r 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, theISO title page, pageii, pages1 and2 and a back cover. This standard has been updated
7、(see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBS7012-6:1998 BSI 04-1999 i Contents Page National foreword Inside front cover Foreword ii Introduction 1
8、1 Scope 1 2 Normative references 1 3 Requirements 1 4 Marking 1 Table 1 Spectral filter diameters, permissible material defects and processing faults 2ii blankBS7012-6:1998 ii BSI04-1999 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards
9、 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 has the right to be represented on that committee. International organiza
10、tions, 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 are circu
11、lated to the member bodies for voting. Publication as an International Standard requires approval by atleast75% of the member bodies casting a vote. International Standard ISO8577 was prepared by Technical Committee ISO/TC172, Optics and optical instruments, Subcommittee SC5, Microscopes andendoscop
12、es. Descriptors: Optics, optical equipment, microscopes, optical microscopes, optical filters, specifications, materials specifications, dimensions, diameters, marking, interchangeability.BS7012-6:1998 BSI 04-1999 1 Introduction The objective of this International Standard is to define the diameters
13、 of spectral filters used in microscopes in order to make an exchange of these filters possible. In addition, qualitative specifications are given for the optical properties of two kinds of filters: filters which can be used in the observation light path, and others with larger optical tolerances wh
14、ich are used in the illumination light path. By choosing appropriate filters, optical microscope illumination can be modified in order to make it possible to view specific details or to improve their observation. 1 Scope This International Standard specifies recommended diameters to allow the interc
15、hangeability of spectral filters used in microscopes, as well as permissible filter material defects and processing faults. This International Standard differentiates between two forms of spectral filters: Form A: Filters to be used both in the observation light path and in the illumination light pa
16、th; Form B: Filters to be used solely in the illumination light path. 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 indicated were valid. All stan
17、dards 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 ISO maintain registers of currently valid International Standards. ISO
18、10110-3:1996, Optics and optical instruments Preparation of drawings for optical elements and systems Part3:Material imperfections Bubbles and inclusions. ISO10110-4: 1) , Optics and optical instruments Preparation of drawings for optical elements and systems Part4:Material imperfections Inhomogenei
19、ty and striae. ISO10110-5:1996, Optics and optical instruments Preparation of drawings for optical elements and systems Part5:Surface form tolerances. ISO10110-7:1996, Optics and optical instruments Preparation of drawings for optical elements and systems Part7:Surface imperfection tolerances. ISO10
20、110-8: 1) , Optics and optical instruments Preparation of drawings for optical elements and systems Part8:Surface texture. 3 Requirements The requirements for interchangeable spectral filters for microscopes are given in Table 1. 4 Marking Filters of form A shall be marked with the indication “ISO85
21、77A”. The marking shall be placed on the filter itself or on the packaging. Marking of filters of form B is not required. 1) To be published.BS7012-6:1998 2 BSI 04-1999 Table 1 Spectral filter diameters, permissible material defects and processing faults Parameter Parameter value Filter form A Filte
22、r form B Recommended diameter d mm 20 25 20 25 32 45 Tolerance on d mm 0 0,13 0 0,13 0 0,16 Diameter of test region for permissible defects mm d1 d1 Impurities ain accordance with ISO10110-7 5/2 0,10 5/4 0,16 5/2 0,25 5/4 0,25 5/3 0,40 5/5 0,40 Striae bin accordance with ISO10110-4 2/;4 2/;1 Surface
23、 form tolerance cin accordance with ISO10110-5 3/3(0,5) 3/20(10) Surface quality din accordance with ISO10110-8 Bubbles ein accordance with ISO10110-3 1/2 0,10 1/2 0,25 1/3 0,40 Parallelism tolerance # 59 # 209 Permissible deflection f # 2,59 # 109 NOTEThe currently used diameters18mm,30mm,40mm and5
24、0mm should be avoided in new designs. Data for diameters apply only to unmounted filters. a This indicates the code number for surface imperfections (5) followed by the number of permissible defects multiplied by the square root, expressed in millimetres, of the area of the maximum allowed defect. E
25、XAMPLE 2 0,10 stands for2 defects with a maximum area of0,01 mm 2(the sum for both sides of the filter). b This indicates the code number for striae(2), the specification for inhomogeneity () and the striae class, i.e.referred to the diameter of the filter, the following permissible effective area o
26、f striae: For filter diameters20mm,25mm,32mm and45mm, permissible effective areas of class4 striae are, respectively,# 3,0mm 2 , # 4,5mm 2 , # 7,5mm 2and# 15mm 2 ; for class1 striae the areas are, respectively,# 30mm 2 , # 45mm 2 , # 75mm 2and# 150mm 2 . c In accordance with ISO10110-5, the first nu
27、mber represents the code number for surface form tolerance(3), followed by the number of interference fringes; the number in brackets indicates the permissible deviation from rotational symmetry. d This indicates that a polished surface is required with less than16 (P3) or80 (P2) microdefects per10m
28、m linear scan. e This indicates the code number for bubbles(1), the permissible number of bubbles, multiplied by the square root, in millimetres, of the area of the largest permissible bubble. f In some cases, pound filters, it may be advisable to state the permissible deflection instead of the para
29、llelism tolerance.blankBS 7012-6: 1998 ISO8577:1997 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is incorporat
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