GB/T 42657-2023 English PDF

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GB/T 42657-2023: Test method of temperature coefficient of infrared refractive index for infrared optical glass - Normal incidence method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 42657-2023	269	Add to Cart	3 days	Test method of temperature coefficient of infrared refractive index for infrared optical glass - Normal incidence method	Valid

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Basic data

Standard ID: GB/T 42657-2023 (GB/T42657-2023)
Description (Translated English): Test method of temperature coefficient of infrared refractive index for infrared optical glass - Normal incidence method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q37
Classification of International Standard: 81.040.30
Word Count Estimation: 14,184
Date of Issue: 2023-08-06
Date of Implementation: 2024-03-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42657-2023: Test method of temperature coefficient of infrared refractive index for infrared optical glass - Normal incidence method

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 81.040.30 CCSQ37 National Standards of People's Republic of China Infrared optical glass infrared refractive index temperature Coefficient test method vertical incidence method Published on 2023-08-06 2024-03-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Foreword

This document complies with the regulations of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Custom drafting. This document is proposed by China Building Materials Federation. This document is under the jurisdiction of the National Industrial Glass and Special Glass Standardization Technical Committee (SAC/TC447). This document was drafted by. Hubei Xinhua Optical Information Materials Co., Ltd., Ningbo University, Xi'an Institute of Applied Optics. The main drafters of this document. Zhang Qing, Honor, Yang Miling, Xu Huafeng, Xu Guangyi, Dai Shixun, Wang Lei, Liu Yongxing.

Introduction

The issuing organization of this document draws attention to the fact that when claiming compliance with this document, it may involve Chapter 4, Chapter 5, Chapter 6 and Chapter 9 and "Testing and Testing". The use of related patents on "Method for Measuring Refractive Index". The issuing organization of this document takes no position on the authenticity, validity or scope of this patent. The patent holder has committed to the issuing authority of this document that he is willing to cooperate with any applicant on reasonable and non-discriminatory terms and conditions. Negotiate patent licensing. A statement of the patent holder has been filed with the issuing authority of this document. Relevant information can be obtained through the following link Obtained by. Patent holder’s name. Hubei Xinhuaguang Information Materials Co., Ltd. Address. No. 67, Changhong North Road, Xiangyang, Hubei Province Please note that in addition to the above patents, some content in this document may still involve patents. The publisher of this document assumes no responsibility for identifying patents responsibility. Infrared optical glass infrared refractive index temperature Coefficient test method vertical incidence method

1 Scope

This document describes the testing principle of the infrared refractive index temperature coefficient of infrared optical glass, stipulates the testing instruments, samples, environmental requirements, measurement test procedures, data processing and test reports. This document is suitable for testing the refractive index temperature coefficient of infrared optical glass in the 2μm ~ 13μm band, and the refraction of other infrared optical materials. Rate temperature coefficient test can be used as a reference.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 36265-2018 Infrared optical glass

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 The change in the refractive index of a material per unit temperature when other conditions remain unchanged. Note. The temperature coefficient of refractive index is expressed by the symbol dn/dT. 3.2 Light is vertically incident on one working surface of the prism and then emerges from the other working surface. It is obtained by measuring the deflection angle of the exiting light relative to the incident light. Index of refraction method.

4 Test principle

The AC reflection image of the triangular prism exiting working surface is used to achieve precise positioning of the sample under test, so that the infrared parallel beam with wavelength λ is vertically incident It reaches the AB surface of the triangular prism with the vertex angle α, passes through the prism and exits from the AC surface, measures the deflection angle β, and calculates the refraction of the sample at this wavelength λ. Rate n. The principle of infrared refractive index testing using the vertical incidence method is shown in Figure 1. ......

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