GB/T 32561.4-2022Measuring methods for chalcogenide infrared optical glass—Part 4: Coefficient of optical absorption (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting.

This document is part 4 of GB/T 32561 "Test Methods for Infrared Optical Chalcogenide Glasses". GB/T 32561 has issued the following part.

--- Part 1: Uniformity;

--- Part 2: Streaks;

--- Part 3: Impurities;

--- Part 4: Light absorption coefficient;

--- Part 5: Stress birefringence.

Introduction

Infrared optical chalcogenide glasses are widely used in thermal imaging, infrared sensing, nonlinear devices, phase change storage, photovoltaics and other fields. its products During production, sales and use, performance parameters need to be obtained under standardized measurement methods. It stipulates the measurement of various optical and electrical parameters methods, ensuring the comparability and reproducibility of test results, and establishing the best order for the production, sales and use of infrared optical chalcogenide glass, It is conducive to promoting the mutual benefits of related parties. GB/T 32561 stipulates the measurement methods of various performance parameters of infrared optical chalcogenide glass, It is intended to consist of 5 parts.

--- Part 1: Uniformity. The purpose is to describe a test method for the internal homogeneity of external optical chalcogenide glasses.

--- Part 2: Streaks. The purpose of this paper is to describe the test method for the internal striae degree of infrared optical chalcogenide glass.

--- Part 3: Impurities. The purpose is to describe the test method for internal impurities of infrared optical chalcogenide glasses.

--- Part 4: Light absorption coefficient. The purpose is to describe the test method for the light absorption coefficient of infrared optical chalcogenide glass.

--- Part 5: Stress birefringence. The purpose is to describe the test method of stress birefringence of infrared optical chalcogenide glass.

The five parts of GB/T 32561 respectively correspond to the tests of five important performance parameters of infrared optical chalcogenide glass during use method. This document is the fourth part of GB/T 32561. This document is the qualitative test and On the basis of characterization, the light absorption coefficient of chalcogenide glass products was further quantitatively tested and characterized.

1 Scope

This document describes the test principle, test environment, test instruments, samples, test procedures, data processing, test uncertainty and test report.

This document is applicable to the test of mid-infrared and near-infrared light absorption coefficients of infrared optical chalcogenide glass, and the light absorption coefficient of other infrared glasses and infrared crystals.

The absorption coefficient test is carried out according to the reference.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 34184-2017 Infrared optical glass infrared refractive index test method deflection angle method

GB/T 36403-2018 Infrared optical glass infrared transmittance test method Fourier transform method

3 Terms and Definitions

The following terms and definitions apply to this document.

4 Test Principle

When the test light passes through the sample vertically, in addition to the reflection of the sample interface, the light intensity will also be attenuated by the absorption of the sample itself.