1、 ISO 2015 Optics and photonics Vocabulary for telescopic systems Part 4: Terms for astronomical telescopes Optique et photonique Vocabulaire relatif aux systmes tlescopiques Partie 4: Termes pour tlescopes astronomiques INTERNATIONAL STANDARD ISO 14132-4 Second edition 2015-03-01 Reference number IS
2、O 14132-4:2015(E) ISO 14132-4:2015(E)ii ISO 2015 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2015 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopyin
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4、mail copyrightiso.org Web www.iso.org Published in Switzerland ISO 14132-4:2015(E)Foreword iv 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 1 ISO 2015 All rights reserved iii Contents Page ISO 14132-4:2015(E) Foreword ISO (the International Organization for Standardization) is a wo
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10、O specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information The committee responsible for this document is ISO/TC 172, Optics
11、and photonics, Subcommittee SC 4, Telescopic systems. This second edition cancels and replaces the first edition (ISO 14132-4:2002), of which it constitutes a minor revision. ISO 14132 consists of the following parts, under the general title Optics and photonics Vocabulary for telescopic systems: Pa
12、rt 1: General terms and alphabetical indexes of terms in ISO 14132 Part 2: Terms for binoculars, monoculars and spotting scopes Part 3: Terms for telescopic sights Part 4: Terms for astronomical telescopes Part 5: Terms for night vision devicesiv ISO 2015 All rights reserved Optics and photonics Voc
13、abulary for telescopic systems Part 4: Terms for astronomical telescopes 1 Scope This part of ISO 14132 applies to astronomical telescopes and gives terms and definitions for astronomical telescopes only. The alphabetical indexes of terms that are common for all published parts of ISO 14132 are publ
14、ished in ISO 14132-1. The definitions can be changed, if required, by introducing derivative attributes into them, revealing the meanings of the terms used, showing the objects covered by the scope of the notion being defined. These changes will not to affect the scope and contents of this part of I
15、SO 14132. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including
16、 any amendments) applies. ISO 14132-1: 1) , Optics and photonics Vocabulary for telescopic systems Part 1: General terms and alphabetical indexes of terms in ISO 14132 3 T erms a nd definiti ons 3.1 astronomical telescope telescopic instrument intended for observations of celestial objects 3.2 clear
17、 aperture of objective D in the object space, the largest diameter of an incident bundle of rays, the axis of said bundle being parallel to the optical axis, that passes unrestricted by the objective mount Note 1 to entry: In this definition, “objective” may mean either refracting objective or refle
18、cting objective. Note 2 to entry: The clear aperture is equal to the entrance pupil diameter of the telescope. 3.3.1 angular resolution Rayleigh criterion capability of an optical system to discriminate two points as separate points Note 1 to entry: It is expressed as the visual angle (in radians or
19、 seconds of arc) in the object space. 1) To be published. INTERNATIONAL ST ANDARD ISO 14132-4:2015(E) ISO 2015 All rights reserved 1 ISO 14132-4:2015(E) 3.3.2 limit of angular resolution quantity based on Rayleigh criterion given in radians by D where is the wavelength of the radiation used for the
20、observation, in millimetres; D is the clear aperture of telescope, in millimetres. SOURCE: ISO 14132-1:, 4.2.13, modified 3.3.3 diffraction limited telescope telescope whose limit of angular resolution complies with Rayleigh criterion 3.3.4 resolving power reciprocal of the angular resolution 3.4 f
21、i nder t e le s c o p e auxiliary telescope attached to the housing of the main telescope and aligned parallel to its axis that facilitates locating a target, such as a star, more readily due to its wider field of view 3.5 diagonal prism right angle prism that redirects the optical viewing axis at a
22、n angle of 90 to the main axis of the telescope for the purpose of allowing easier observation of certain objects 3.6 Barlow lens negative focal length lens or lens system placed between the objective and its focal plane for providing an increase in effective focal length of the objective 3.7 solar
23、projection plate projection screen on which an image of the Sun is projected by the eyepiece or a special projection lens 3.8 Herschel wedge wedge-type prism that is oriented at 45 to the optical axis of a telescope for the purpose of reducing the brightness of the reflected image of the Sun Note 1 to entry: The optical viewing axis is redirected at an angle of 90 to the main axis of the telescope by a Herschel wedge.2 ISO 2015 All rights reserved ISO 14132-4:2015(E) ISO 2015 All rights reserved IC S 01.040.37; 37.020 Price based on 2 pages
