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BS ISO 15368:2021

BS ISO 15368:2021

$142.49

Optics and photonics. Measurement of reflectance of plane surfaces and transmittance of plane parallel elements

Published By Publication Date Number of Pages
BSI 2021 30
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This document provides rules for the measurement of the spectral reflectance of plane surfaces and the spectral transmittance of plane parallel elements using spectrophotometers.

This document only applies to measurements of the regular transmittance and the regular reflectance; it does not apply to those of the diffuse transmittance and the diffuse reflectance.

This document is applicable to test samples, which are coated or uncoated optical components without optical power.

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 and units
11 5 Test sample
6 Measuring apparatus
13 7 Test conditions
7.1 Dispersive type spectrophotometer
7.1.1 General
7.1.2 Optical radiation source
14 7.1.3 Monochromator
7.1.4 Detection system
7.1.5 Numerical correction
7.2 Fourier-transform type spectrophotometer
7.2.1 General
7.2.2 Optical radiation source
15 7.2.3 Interferometer
7.2.4 Detection system
7.2.5 Numerical correction
16 8 Test procedure
8.1 Measurement of reflectance
8.1.1 General
8.1.2 Direct measurement of regular reflectance
17 8.1.3 Relative measurement of regular reflectance
18 8.1.4 Measurement of relative reflectance
8.2 Measurement of transmittance
8.2.1 Regular transmittance
8.2.2 Internal transmittance of an optical plate
19 9 Common sources of error
9.1 General
9.2 Monochromator wavelength uncertainty, reproducibility and spectral resolution
20 9.3 Interferometer wavenumber uncertainty, reproducibility and spectral resolution
9.4 Fluctuation of the incident flux
9.5 Parallelism of the sample
9.6 Monochromator stray optical radiation
21 9.7 Linearity of the detection system
9.8 Inter-reflections
9.9 Misalignment of the sample
9.10 Monochromator baseline reproducibility
9.11 Beam divergence
22 10 Test report
23 Annex A (informative) Spectrophotometers
28 Annex B (informative) Refractive index of synthetic fused silica
29 Bibliography

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BS ISO 15368:2021
$142.49