1、BRITISH STANDARDBS ISO 21094:2008Optics and photonics Telescopic systems Specifications for night vision devicesICS 37.020g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g
2、44g42g43g55g3g47g36g58BS ISO 21094:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2008 BSI 2008ISBN 978 0 580 55531 2National forewordThis British Standard is the UK implementation of ISO 21094:2008.The UK participation in its pr
3、eparation was entrusted to Technical Committee CPW/172, Optics and photonics.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 contract. Users are responsible for its correc
4、t application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsReference numberISO 21094:2008(E)INTERNATIONAL STANDARD ISO21094First edition2008-02-15Optics and photonics Telescopic systems Specifications for
5、night vision devices Optique et photonique Systmes tlescopiques Spcifications pour dispositifs de vision de nuit BS ISO 21094:2008ii iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing
6、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 organizations, governmental and non-governmental, in liaiso
7、n 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 with the rules given in the ISO/IEC Directives, Part 2. The main task of tec
8、hnical 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 approval by at least 75 % of the member bodies casting a vote. Attention is dra
9、wn 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 21094 was prepared by Technical Committee ISO/TC 172, Optics and photonics, Subcommittee SC 4, Telescopic systems
10、. BS ISO 21094:2008blank1Optics and photonics Telescopic systems Specifications for night vision devices 1 Scope This International Standard applies to night vision devices such as binoculars, monoculars and goggles that are used for observation activities at night such as rescue actions under low l
11、ight conditions, urgent repairs in the dark and night time surveillance. The International Standard does not cover thermal imaging technology. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cite
12、d applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 14132-1, Optics and optical instruments Vocabulary for telescopic systems Part 1: General terms and alphabetical indexes of terms in ISO 14132 ISO 14132-2, Optics and optical inst
13、ruments Vocabulary for telescopic systems Part 2: Terms for binoculars, monoculars and spotting scopes ISO 14132-5 1), Optics and optical instruments Vocabulary for telescopic systems Part 5: Terms for night vision devices ISO 14490-8 1), Optics and photonics Test methods for telescopic systems Part
14、 8: Test methods for night-vision devices 3 Terms and definitions For terms and definitions that apply to night vision devices refer to ISO 14132-5. For terms and definitions and reference of letter symbols that apply to telescopic systems in general refer to ISO 14132-1. For terms and definitions t
15、hat apply to binocular and monocular systems refer to ISO 14132-2. 1) To be published. BS ISO 21094:20082 4 Specifications 4.1 General The tests for compliance of night vision devices to values and tolerances specified in Table 1 and Table 2 shall be carried out in accordance with ISO 14490-8. 4.2 T
16、olerances Acceptable deviations of the optical characteristics of night vision devices shall be within the limits given in Table 1. Table 1 Acceptable deviations of optical characteristics Values of tolerances Characteristics for binoculars and monoculars for goggles Magnificationa, 7 % Range of vis
17、ionb 20 % Night vision device gain 10 % Field of view in the object space 5% 10% Eye relief, in millimetres 1 to +5 Zero-setting error of dioptre scale, in dioptres 1,0 Image rotation, in degrees of arc 1,5 Disparity of image rotationsc, in minutes of arc 40 Relative difference in magnificationc2 %
18、3 % Non-parallelism of axes of beams emergent from eyepiecesc, in minutes of arc: dipvergence divergence convergence 30 100 40 aFor variable (zoom or discrete) magnification instruments this refers to minimum and maximum magnifications. bFor variable (zoom or discrete) magnification instruments this
19、 refers to the maximum magnification. cNot applicable for monoculars. BS ISO 21094:200834.3 Minimum requirements for optical characteristics Values of optical characteristics for night vision devices shall be not less of those given in Table 2. Table 2 Minimum requirements to optical characteristics
20、 Values Characteristics for binoculars and monoculars for goggles in minutes of arc ()6Limit of resolution in object spacea, bin cycles per milliradian ( )0, 6Dioptre adjustment range, in dioptres 4 to +2 5 to +2 Eye relief, in millimetres 12 15 Range of interpupillary distance adjustment, in millim
21、etres c, d60 to 70 Close distance, in metres 0,3 Imperfections in the field of view eThree spots maximum 0,1 mm in diameter are acceptable in the central area equal to 1/3 of the screen diameter. For the rest of the screen two spots maximum 0,3 mm or ten spots maximum 0,2 mm in diameter are acceptab
22、le. aFor variable (zoom or discrete) magnification instruments this refers to the maximum magnification. bThe limit of resolution is defined for the centre of the field of view under the optimal object irradiance, the optimum voltage on the image intensifier, the specified contrast and the maximum m
23、agnification. cThe range of interpupillary distance adjustment may not exist when the exit pupil diameter is large enough (above 10 mm). dNot applicable to monoculars. eThe specification of spot sizes in minutes of arc calculated under condition that the focal length of eyepiece is 25 mm and rounded
24、 off to the whole number of minutes, is acceptable. 5 Consumer information 5.1 Designation and marking Table 3 Designation and marking Designation and marking Characteristics required recommended Magnification or range of magnificationsa Name of the manufacturer or registered trade mark Country of o
25、rigin Serial number Name of the product aNot applicable for instruments with interchangeable lenses and/or eyepieces. BS ISO 21094:20084 5.2 Information about the product Table 4 Information about the product Information Characteristics required recommended Magnification or range of magnificationsa
26、Name of the manufacturer or registered trade mark Country of origin Serial number Name of the product Field of view in the object space, in degrees of arc Eye relief at 1 mm reference aperture diameter, in millimetres Alternative eye relief and reference aperture diameterb, in millimetres Range of v
27、ision, in metres Limit of resolution, in minutes of arc or cycles per milliradians Night vision device gain Range of interpupillary distance adjustmentc, in millimetres Close distance, in metresDioptre adjustment range, in dioptres Continuous work time, in hours Overall size, in millimetres Mass or
28、weight, in grams Operational temperature range, in degrees centigrade Water and moisture resistance Type of power supply Type of emitterbSafety Maximum radiance (of the scene) Spectral sensitivity Lifetime, in years aNot applicable for instruments with interchangeable lenses and/or eyepieces. bIf ap
29、plicable. cNot applicable for monoculars. BS ISO 21094:2008blankBS ISO 21094:2008BSI Group Headquarters389 Chiswick High Road,London W4 4AL, UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 Standards Institute (BSI)BSI is the independent national body responsible for preparing British Standards. It pres
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