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GB/T 45908-2025Sodium chloride optical components (English PDF)

氯化钠光学元件

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

June 30, 2025

Implementation date

January 1, 2026

Scope

GB/T 45908-2025 is the English-translated version of 氯化钠光学元件.

GB/T 45908-2025 is the Chinese national standard covering sodium chloride optical components for the infrared — the density, melting point and thermal properties, the infrared transmittance and refractive index and its temperature coefficient, the homogeneity, striae and bubbles in the crystal, the surface figure, roughness and defects, the test methods, the inspection rules, and the packaging and storage that a salt component needs because it takes up water from the air.

First edition, under the China Machinery Industry Federation. In force from 1 January 2026. Issued on 30 June 2025, it has been in force since 1 January 2026.

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Document preview — GB/T 45908-2025

National Standard of the People's Republic of China

ICS: 31.260
Classification: N 05

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

PrefaceIII
1 Scope1
2 Normative references1
3 Terms and Definitions1
4 Technical Requirements1
5 Test methods4
6 Inspection Rules8
7 Packaging, marking, transportation and storage10

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 is required.

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document was proposed by the China Machinery Industry Federation.

This document is under the jurisdiction of the National Technical Committee for Standardization of Optics and Photonics (SAC/TC103).

This document was drafted by: Jilin Jianzhu University, Changchun University of Science and Technology, China Ordnance Industry Standardization Institute, Anhui Guangzhi Technology Co., Ltd.

Changchun Baitai Precision Optical Instrument Technology Co., Ltd., Zhejiang Weixing Optics Co., Ltd., Jiangsu Bridgeman Technology Co., Ltd.

Tianjin Botian Shengda Technology Development Co., Ltd., Jilin Province Science and Technology Innovation Research Institute Co., Ltd., Tianjin Tianguang Optical Instrument Co., Ltd., Du Guangming Optoelectronics Co., Ltd., Dongguan Yutong Optical Technology Co., Ltd., and Beijing Puxi General Instrument Co., Ltd.

The main drafters of this document are: Li Yongtao, Zhang Xuejian, Zeng Fanming, Zhao Hongkai, Chen Jianhui, Di Juqing, Liang Bingshuang, Shen Chenggang, Li Zhuangbin, Yang Limin, Yin Shiping, Liu Huisheng, Wu Chuhan, Qi Haina, Gu Yongfa, Li Wenjie, Liu Jinghe, Wang Shanxiansong, Xue Lisha, Meng Yinxia, He Jianwei, Wang Zhen.

Sodium chloride optical components

1 Scope

This document specifies the technical requirements, inspection rules, packaging, marking, transportation and storage requirements of sodium chloride optical components. Appropriate test method.

This document applies to the manufacture and inspection of sodium chloride optical components.

2 Normative references

GB/T 903

GB/T 1185

GB/T 1555

GB/T 2828.1

GB/T 2831

GB/T 7661

GB/T 7962.6

GB/T 7962.16

GB/T 19466.4

GB/T 21781

GB/T 32561.1

GB/T 32561.2

GB/T 32561.4

GB/T 32642

GB/T 34184

GB/T 36403

GB/T 42657

GB/T 44567

3 Terms and Definitions

There are no terms or definitions that require definition in this document.

4 Technical Requirements

4.1 Density

At 25°C, the density should be (2.16±0.01) g/cm3.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.

Referenced standards

Normative references

Editions of GB/T 45908

Edition	Title	Revision	Status
GB/T 45908-2025	Sodium chloride optical components	current edition	Current

This page sells the current edition, GB/T 45908-2025. Earlier editions are listed for reference only.

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