1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58stereomicroscopes Part 2: High performance microscopes ICS 37.020Optics and photonics Minimum requi
2、rements for BRITISH STANDARDBS ISO 11884-2:2007BS ISO 11884-2:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2007 BSI 2007ISBN 978 0 580 50646 8Amendments issued since publicationAmd. No. Date Commentscontract. Users are responsib
3、le for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard was published by BSI. It is the UK implementation of ISO 11884-2:2007. It supersedes BS 7012-10.2:1997 which is withdrawn.The UK participation in its
4、 preparation was entrusted by Technical Committee CPW/172, Optics and photonics, to Subcommittee CPW/172/5, Microscopes.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a Ref
5、erence numberISO 11884-2:2007(E)INTERNATIONAL STANDARD ISO11884-2Second edition2007-02-01Optics and photonics Minimum requirements for stereomicroscopes Part 2: High performance microscopes Optique et photonique Exigences minimales pour les stromicroscopes Partie 2: Microscopes hautes performances B
6、S ISO 11884-2:2007ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Requirements 1 5 Test methods. 4 6 Accompanying documents 4 7 Marking 4 BS ISO 11884-2:2007iv Foreword ISO (the International Organization for Standardization) is a worldwide federat
7、ion of national standards 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 committe
8、e. International 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. International Standards are drafted in accordance
9、with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires app
10、roval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 11884-2 was prepared by Technical Com
11、mittee ISO/TC 172, Optics and photonics, Subcommittee SC 5, Microscopes and endoscopes. This second edition cancels and replaces the first edition (ISO 11884-2:1997), which has been technically revised. ISO 11884 consists of the following parts, under the general title Optics and photonics Minimum r
12、equirements for stereomicroscopes: Part 1: Stereomicroscopes for general use Part 2: High performance microscopes BS ISO 11884-2:20071Optics and photonics Minimum requirements for stereomicroscopes Part 2: High performance microscopes 1 Scope This part of ISO 11884 specifies minimum requirements for
13、 high performance stereomicroscopes. It is not applicable to operation microscopes. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of th
14、e referenced document (including any amendments) applies. ISO 7944, Optics and optical instruments Reference wavelengths ISO 9022-2, Optics and optical instruments Environmental test methods Part 2: Cold, heat and humidity ISO 9022-3, Optics and optical instruments Environmental test methods Part 3:
15、 Mechanical stress ISO 11883, Optics and optical instruments Microscopes Marking of stereomicroscopes ISO 10934-1, Optics and optical instruments Vocabulary for microscopy Part 1: Light microscopy ISO 15227, Optics and optical instruments Microscopes Testing of stereomicroscopes IEC 61010-1:2001, Sa
16、fety requirements for electrical equipment for measurement, control and laboratory use Part 1: General requirements 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 10934-1 apply. 4 Requirements All the indications given below are minimum requirements
17、. They apply to the reference wavelength in accordance with ISO 7944. 4.1 Optical and mechanical specifications The specifications given in Table 1 shall apply. BS ISO 11884-2:20072 Testing shall be done in accordance with 5.1. Table 1 Requirements for optical and mechanical specifications Criterion
18、 Requirements Tolerance of total magnification 7,5 % Difference in magnification between left and right optical systems u 1,5 % vertical u 15 convergence u 45 Difference in axis between left and right optical systemsahorizontalbdivergence u 10 Horizontal difference in the centre of the primary image
19、 between left and right optical systemsc u 0,33 mm vertical u 0,2 mmd divergence u 0,4 mmdDifference in centres of eyepiece diaphragm between left and right optical systems horizontaleconvergence u 0,4 mmdShift of focussing planes axial object plane Sou 3 DFf gby magnification change lateral image p
20、laneh u 0,4 mm diameter Focus difference between both optical systems DL/R 1,5 DFf The resolution in the centre of the field shall be a minimum of 2 500 NA line pairs/mm Difference in imaging rotation between right and left image u 2 Difference in exit pupil height between left and right optical sys
21、tems u 1,5 mm at 0 D on the dioptre scale Calibration error if a dioptre scale is used 0,25 D at 0 D on the dioptre scale Minimum range for interpupillary distance 55 mm to 75 mm Eyepiece Minimum adjustment range + 5 D to 5 D aIncluding a 10 eyepiece and 0 D adjustment. bThis requirement does not ap
22、ply to those stereomicroscopes where the mechanical axes of the eyepieces are not parallel to each other due to the design. cThis requirement is only valid if the horizontal difference in axis does not apply. dTo be measured on the image plane of the stereomicroscope to be tested. eThis requirement
23、applies to those stereomicroscopes where the mechanical axes of the eyepieces are not parallel due to the design. fDepth of field, in millimetres (in object space) F2TOT VIS17NA2NADM=+where: is the wavelength, in millimetres; NA is the numerical aperture; MTOT VIS is the total visual magnification.
24、gSois the shift of object plane. hThe displacement of a centred structure shall be inside a centred circle of 0,4 mm diameter in the primary image plane. BS ISO 11884-2:200734.2 Environmental conditions Testing shall be done in accordance with 5.2. 4.2.1 Conditions of use The functioning of stereomi
25、croscopes, given in the relevant instrument specifications, shall be ensured under the environmental conditions given in Table 2. Under these conditions, all optical and mechanical requirements, in particular the accuracy requirements, apply, if necessary, with the inclusion of correction tables. Ta
26、ble 2 Conditions of use Criterion Environmental condition Temperature + 10 C to + 40 C Relative humidity u 85 % Atmospheric pressure 700 hPa to 1 060 hPa Shock 10 g duration 6 ms 4.2.2 Storage conditions After being exposed to the conditions given in Table 3, stereomicroscopes have to meet the instr
27、ument specification under the conditions of use according to 4.2.1. Table 3 Storage conditions Criterion Environmental condition Temperature 10 C to + 55 C Relative humidity u 95 % Atmospheric pressure 700 hPa to 1 060 hPa 4.2.3 Transport conditions The transport clause is recommended for all packin
28、g requirements, but the following conditions shall apply when the use of this part of ISO 11884 is claimed by the manufacturer. After exposure of the stereomicroscopes in their original packing to the conditions given in Table 4, the stereomicroscopes shall meet the instrument specifications under t
29、he conditions of use according to 4.2.1. Table 4 Transport conditions Criterion Environmental condition Temperature 40 C to + 70 C Relative humidity u 100 % Atmospheric pressure 500 hPa to 1060 hPa Sinusoidal vibration 10 Hz to 500 Hz: 0,5 g Shock 30 g duration 6 ms Bump 10 g duration 6 ms BS ISO 11
30、884-2:20074 4.3 Safety Testing shall be done in accordance with 5.3. IEC 61010-1 shall apply. 5 Test methods All tests specified in this part of ISO 11884 are type tests. Compliance with the requirements in accordance with 4.1 shall be tested in accordance with ISO 15227. 5.1 Testing of optical and
31、mechanical specifications Compliance with the requirements in accordance with 4.1 are checked with measuring devices whose measuring error shall be smaller than 10 % of the value to be determined. Measurements shall be carried out according to general rules of statistical evaluation. 5.2 Testing of
32、environmental conditions The requirements of 4.2 shall be tested in accordance with the test methods of the relevant part of ISO 9022 given in Table 5. 5.3 Testing of safety Tests in accordance with IEC 61010-1 shall apply. 6 Accompanying documents The stereomicroscope shall be accompanied by docume
33、nts containing instructions for use, cleaning and maintenance. 7 Marking Marking shall be in accordance with ISO 11883. BS ISO 11884-2:20075Table 5 Environmental tests Conditions Test code Reference according to ISO 9022 Part Remarks ISO 9022-11-01-2 (10 2) C / 16 h dry heat ISO 9022-11-01-2 (40 2)
34、C / 16 h Environmental conditions of use ISO 9022-12-01-2 (40 2) C / 90 % to 95 % RH / 24 h 2 damp heat ISO 9022-10-01-1 ( 10 3) C / 16 h cold ISO 9022-11-02-1 (+ 55 2) C / 16 h dry heat Storage conditions ISO 9022-12-01-1 (+ 40 2) C / 90 % to 95 % RH / 16 h 2 damp heat ISO 9022-10-05-0 ( 40 3) C /
35、16 h cold ISO 9022-11-04-0 (+ 70 2) C /16 h dry heat ISO 9022-16-01-0 + 23 C / 80 % to 85 % RH / + 40 C / 90 % to 95 % RH / 5 2 damp heat, cyclic ISO 9022-30-03-0 30 g / 6 ms shock ISO 9022-31-01-0 Bump 10 g / 6 ms / 1 000 bump Transport conditions ISO 9022-36-02-0 1 g / 10 Hz to 2 000 Hz / 2 3 sinu
36、soidal vibration NOTE 1 The environmental test-code designation reads as follows: NOTE 2 The numbers used in the test code to represent conditioning methods have the following meaning: 10: cold 11: dry heat 12: damp heat13: condensed water 14: slow temperature change 16: damp heat, cyclic 30: mechan
37、ical stress shock 31: mechanical stress bump 36: mechanical stress sinusoidal vibration NOTE 3 Severity grades are given in the relevant part of ISO 9022. NOTE 4 The figures of the state of operation mean: 0: Specimen in its normal transport and/or storage container as provided by the manufacturer.
38、1: Specimen unprotected, ready for operation, power supply not connected. 2: Specimen in operation during the test, as specified in the relevant specification. BS ISO 11884-2:2007BS ISO BSI389 Chiswick High RoadLondonW4 4AL11884-2:2007BSI British Standards InstitutionBSI is the independent national
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