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BS ISO 19740:2018

BS ISO 19740:2018

$142.49

Optics and photonics. Optical materials and components. Test method for homogeneity of infrared optical materials

Published By Publication Date Number of Pages
BSI 2018 26
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This document specifies the principle, apparatus, condition, sample, procedure and data processing of measuring homogeneity of infrared optical materials.

It is applicable to the determination of homogeneity of infrared optical materials, such as infrared optical glass, infrared crystals and infrared ceramics, which are opaque to visible wavelengths and whose transmission optical spectra are beyond 0,78 µm.

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
7 1 Scope
2 Normative references
3 Terms and definitions
8 4 Principle
9 5 Apparatus
5.1 Apparatus arrangement
10 5.2 Optical module of interferometer
5.3 Reference flat
5.4 Standard mirror
5.5 Image sensor
5.6 Computer data collecting, processing and displaying system
5.7 Thickness measurement equipment
6 Test conditions
6.1 Temperature
6.2 Relative humidity
6.3 Vibration isolation
11 6.4 Airflow
7 Sample
7.1 Outline
7.1.1 Wedge shaped sample
7.1.2 Parallel plane sample
7.2 Thickness
7.3 Wedge angle
12 7.4 Polished surfaces
7.4.1 Wedge shaped sample
7.4.2 Parallel plane sample
8 Procedure
8.1 Four-step method
13 8.2 Two-step method
9 Data processing
9.1 Calculation of refractive index error distribution with the four-step method
14 9.2 Calculation of refractive index error distribution with the two-step method
9.3 Calculation of the PV value and the standard deviation value of refractive index
10 Calculation of measurement value and measurement uncertainty
10.1 Calculation of measurement value
15 10.2 Calculation of measurement uncertainty
10.3 Frequency of measuring sample
11 Expanded uncertainty of the measurement
12 Test Report
17 Annex A (informative) Infrared interferometer
20 Annex B (informative) Temperature stability for homogeneity measurements
22 Annex C (informative) Flatness of sample
24 Annex D (informative) Test record for homogeneity of infrared optical materials
25 Bibliography

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BS ISO 19740:2018
$142.49