IS 5920 : Part 12 : 2024/ISO 10110-18 : 2018 Optics and Photonics - Preparation of Drawings for Optical Elements and Systems - Part 12 Stress Birefringence, Bubbles and Inclusions, Homogeneity and Striae

ICS 37.020; 01.100.20

PGD 39

NATIONAL FOREWORD

This Indian Standard (Part 12) which is identical to ISO 10110-18 : 2018 'Optics and photonics - Preparation of drawings for optical elements and systems - Part 18: Stress birefringence, bubbles and inclusions, homogeneity, and striae' issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Optics and Photonics Sectional Committee and approval of the Production and General Engineering Division Council.

This standard specifies the indication of tolerances for four categories of imperfections within optical materials - stress birefringence, bubbles and inclusions, homogeneity, and striae. Tolerances are applied either to a finished optical part, a finished system of optical parts, or to the raw material used to manufacture an optical part.

IS 5920 (Part 1) supersedes the originally published Indian Standard IS 5920 : 1970 'Recommendation for the preparation of drawing for optical elements and system'.

This standard has been published in thirteen parts. The other parts in this series are:

Part 1 General

Part 2 Surface form tolerances

Part 3 Centering tolerances

Part 4 Surface imperfections

Part 5 Surface texture

Part 6 Surface treatment and coating

Part 7 Non-tolerance data

Part 8 Aspheric surfaces

Part 9 Wave front deformation tolerance

Part 10 Diffractive surfaces

Part 11 Laser irradiation damage threshold

Part 13 General description of surfaces and components

The text of ISO standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words 'International Standard' appear referring to this standard, they should be read as 'Indian Standard'; and

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current-practice is to use a point (.) as the decimal marker.