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BS ISO 13142:2021

BS ISO 13142:2021

$142.49

Optics and photonics. Lasers and laser-related equipment. Cavity ring-down method for high-reflectance and high-transmittance measurements

Published By Publication Date Number of Pages
BSI 2021 26
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This document specifies measurement procedures for the precise determination of the high reflectance or high transmittance (>99 %) of optical laser components.

The methods given in this document are intended to be used for the testing and characterization of high reflectance of both concave and plane mirrors or high transmittance of plane windows used in laser systems and laser-based instruments. The reflectance of convex mirrors or transmittance of positive or negative lenses can also be tested by taking into consideration the radius of curvature of the mirror surface or the focal length of the lens. This document is complementary to ISO 15368 which specifies the measurement procedures for the determination of reflectance and transmittance of optical components with spectrophotometry. ISO 15368 is applicable to the measurements of reflectance and transmittance in the range from 0 % to 100 % with a typical accuracy of ±0,3 %, and is therefore not applicable to the precise measurements of reflectance and transmittance higher than 99,9 %.

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Symbols used and units of measure
5 Test principles
5.1 General
5.2 Decay time of initial cavity and reflectance of cavity mirrors
12 5.3 Decay time of test cavity and reflectance/transmittance of test sample
13 5.4 High reflectance/transmittance measurement with an optical feedback CRD technique
14 6 Preparation of test sample and measurement arrangement
6.1 Test sample
6.2 Laser source
15 6.3 Ring-down cavity
6.4 Detection unit
6.5 Data acquisition and processing
16 6.6 Environment
7 Test procedure
7.1 General
7.2 Measurement of decay time of initial cavity
17 7.3 Calculation of reflectance of cavity mirrors
7.4 Measurement of decay time of test cavity
7.5 Calculation of reflectance/transmittance of test sample
7.6 Assessments of the measurement
18 8 Main error factors
8.1 Influence of the instrumental response time on reflectance/transmittance measurement
8.1.1 General
8.1.2 Multi-parameter fitting method
19 8.1.3 Data truncation method
8.2 Measurement error of the reflectance of cavity mirrors
20 8.3 Measurement error of the reflectance/transmittance of test sample
9 Test report
22 Annex A (informative) Reflectance/transmittance reliability check experiment
23 Annex B (informative) Test report
25 Bibliography

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BS ISO 13142:2021
$142.49