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GB/T 45706-2025 English PDF

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GB/T 45706-2025: Uncut finished spectacle lenses - Test methods of refractive index
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Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 45706-2025	English	379	Add to Cart	4 days [Need to translate]	Uncut finished spectacle lenses - Test methods of refractive index	Valid	GB/T 45706-2025

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Basic data

Standard ID	GB/T 45706-2025 (GB/T45706-2025)
Description (Translated English)	Uncut finished spectacle lenses - Test methods of refractive index
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	Y89
Classification of International Standard	11.040.70
Word Count Estimation	18,146
Date of Issue	2025-05-30
Date of Implementation	2025-12-01
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration

GB/T 45706-2025: Uncut finished spectacle lenses - Test methods of refractive index

---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 11.040.70 CCSY89 National Standard of the People's Republic of China Test method for refractive index of eyeglass lenses Released on 2025-05-30 2025-12-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 V prism method 1 5 Abbe refractometer method 4 6 Michelson interferometry 6 7 Dielectric Immersion Method 8 Appendix A (Informative) Uncertainty of Refractive Index Test Method 11 Appendix B (Normative) Conversion between group refractive index and phase refractive index 12 Reference 13

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. 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 China Light Industry Federation. This document is under the jurisdiction of the National Technical Committee on Optometry Standardization (SAC/TC596). This document was drafted by. Donghua University, Carl Zeiss Optics (Guangzhou) Co., Ltd., Ningbo Fario Optical Technology Development Co., Ltd., Shanghai Essilor Optics Co., Ltd., Yingchang Group Co., Ltd., Zhejiang Weixing Optics Co., Ltd., Jiangsu Shike New Materials Co., Ltd. Company, Jiangsu Ruier Optical Co., Ltd., Jiangsu Quanzhen Optical Technology Co., Ltd., Shenzhen Huiming Optical Co., Ltd., National Optical Glass Glass and enamel products quality inspection and testing center. The main drafters of this document are. Wang Likun, Ouyang Liu, He Yunhui, Li Chao, Zhang Shengtao, Song Zhen, Hou Dongcai, Wang Song, Wang Minghua, Chen Zhengxiu, Li Jun, Li Zhaojiao, Ye Jiayi, and Sun Jingjie. Test method for refractive index of eyeglass lenses

1 Scope

This document describes the V-prism method, the Abbe refractometer method, the Michelson interferometer method and the dielectric immersion method for measuring the refractive index of eyeglass lenses. Emission rate. This document applies to the measurement of the refractive index of eyeglass lenses.

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 17341 Optics and optical instruments - Lensmeters GB/T 26397 Ophthalmic Optics Terminology

3 Terms and definitions

The terms and definitions defined in GB/T 26397 and the following apply to this document. 3.1 V-blockprism A prism that has been processed into a specified shape for measuring refractive index. 3.2 A transparent liquid with a refractive index close to that of the sample being measured, generally used to measure the refractive index using the V-prism method. 3.3 contacting liquid A transparent liquid with a refractive index greater than that of the sample being measured, generally used to measure the refractive index using an Abbe refractometer. 3.4 phase refractive indexphaserefractiveindex When light propagates in a medium, the ratio of the speed of light in a vacuum to the phase velocity of light in the medium. 3.5 group refractive indexgrouprefractiveindex When light propagates in a medium, the ratio of the speed of light in a vacuum to the group velocity of light in the medium.

4 V Prism Method

4.1 Test conditions Ambient temperature. 23℃±5℃; relative humidity. 30%~80%.

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