GB/T 39552.2-2020 English PDF

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GB/T 39552.2-2020: Sunglasses and sun glare filters - Part 2: Test methods
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Similar standards

GB 39800.2   GB 39800.1   GB/T 38300   GB 39800.10   GB 31420   GB 39552.1   

Basic data

Standard ID: GB/T 39552.2-2020 (GB/T39552.2-2020)
Description (Translated English): Sunglasses and sun glare filters - Part 2: Test methods
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: C73
Classification of International Standard: 13.340
Word Count Estimation: 59,590
Date of Issue: 2020-12-14
Date of Implementation: 2021-12-01
Adopted Standard: ISO 12311-2013, NEQ
Regulation (derived from): National Standard Announcement No. 28 of 2020
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 39552.2-2020: Sunglasses and sun glare filters - Part 2: Test methods

---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.
(Sunglasses and Sunglass Lenses Part 2: Test Methods) ICS 13:340 C73 National Standards of People's Republic of China Sunglasses and sunglass lenses: Part 2: Test methods (ISO 12311:2013,Personalprotectiveequipments- 2020-12-14 release 2021-12-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee

Table of contents

Preface Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 General 1 4:1 Test environment 1 4:2 Test position 1 5 Structure and materials 2 6 Transmittance 2 6:1 Sunglasses and sunglasses 2 6:2 Prescription Corrective Sunglasses and Sunglass Lenses 2 6:3 Calculation method of light transmittance τV 2 6:4 Uniformity of light transmittance 2 6:5 Calculation method of UV transmittance 3 6:6 Calculation method of solar blue light transmittance τsb 4 6:7 Calculation method of solar infrared spectrum transmittance τSIR 4 6:8 Calculation method of light reflectance ρV 5 6:9 Calculation method of relative attenuation visual factor Q 5 6:10 Scattered light 5 6:11 The transmission plane of polarized lenses and polarized sunglasses 7 6:12 Photochromic lenses 8 7 Optical properties 10 7:1 Spherical degree and astigmatism 10 7:2 Prism deviation of sunglasses or binocular lens 14 8 Mechanical properties 15 8:1 Fatigue strength of sunglasses 15 8:2 Nose bridge deformation and lens holding force 18 8:3 Resistance to light irradiation 20 8:4 Flame retardancy 21 8:5 Coating performance 22 8:6 Protection performance 23 8:7 Wear resistance 27 8:8 Nickel precipitation 27 Appendix A (Normative Appendix) Relationship between Sunglass Lens Thickness and Transmittance 28 Appendix B (Normative Appendix) The spectral distribution of standard light source D65 radiation and the spectral luminous efficiency function of daylight 29 Appendix C (Normative Appendix) Spectral functions used to calculate solar ultraviolet transmittance and solar blue transmittance 30 Appendix D (Normative Appendix) Solar spectral power distribution of infrared spectrum used to calculate solar infrared transmittance 32 Appendix E (Normative Appendix) The spectral luminous efficiency function V(λ) of the daylight of the incandescent light source signal lamp 34 Appendix F (informative appendix) Spectral luminous efficiency function V(λ) of daylight of LED light source signal lamp 37 Appendix G (informative appendix) Calibration of telescope measuring devices using variable distance method 40 Appendix H (Normative Appendix) Conversion between telescope method measurement results and focal meter method measurement results 42 Appendix I (Normative Appendix) Application of Measurement Uncertainty 43 Appendix J (informative appendix) Long-wavelength band pass filter 45 Appendix K (informative appendix) Uncertainty analysis of spectrophotometer 49 Reference 55

Foreword

GB/T 39552 "Sunglasses and Sunglass Lenses" is divided into two parts: ---Part 1: General requirements; ---Part 2: Test method: This part is Part 2 of GB/T 39552: This section was drafted in accordance with the rules given in GB/T 1:1-2009: This part uses the redrafting method to refer to the edition of ISO 12311:2013 "Test Methods for Personal Protective Equipment Sunglasses and Related Products" The degree of consistency with ISO 12311:2013 is not equivalent: This part is under the jurisdiction of the National Optical and Photonics Standardization Technical Committee (SAC/TC103): Drafting organizations of this section: China National Institute of Standardization, Guangzhou Institute of Metrology and Testing Technology, National Eyewear Product Quality Supervision and Inspection Center, Zhejiang Yingchang Glasses Industry Co:, Ltd:, National Quality Supervision and Inspection Center for Glasses and Enamel Products, Xiamen Quansheng Industry Co:, Ltd:, Chengyi Optics (Xiamen) Co:, Ltd:, Laiming Industry (Xiamen) Co:, Ltd:, Xiamen Jindahe Glasses Co:, Ltd: The main drafters of this section: Huang Shuai, Guo Dehua, Tang Lingling, Ye Jiayi, Li Yuhao, Lin Meide, Guo Ya, Sun Huanbao, Hou Dongcai, Lin Zhengmao, Wu Dangyi, Wu Jinzhong, Zhou Boyan, Sun Kaiyue, Liu Hongjun, Wang Huiping, Zhang Jie, Guo Linlin: Sunglasses and sunglass lenses: Part 2: Test methods

1 Scope

This part of GB/T 39552 specifies the test methods for flat sunglasses and sunglasses: This section applies to general-purpose sunglasses (including road and driving use), sunglasses lenses, sunglasses clips and lens sets: Prescription sun correction Refer to this section for the test methods for the transmittance performance of mirrors and sunglasses: This section does not apply to lenses that protect against artificial light sources (such as light sources used in solariums) and goggles for industrial use: It is not suitable for special lenses that can directly observe the sun (such as observing solar eclipses, etc:):

2 Normative references

The following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article Pieces: For undated references, the latest version (including all amendments) applies to this document: GB/T 6682 Analytical laboratory water specifications and test methods (GB/T 6682-2008, ISO 3696:1987, MOD) GB 10810:1-2005 Spectacle lenses Part 1: Single vision and multifocal lenses (ISO 8980-1:2004, MOD) GB 10810:5-2012 Spectacle lenses Part 5: Requirements for surface wear of lenses (ISO 8980-5:2005, MOD) GB/T 26397 Ophthalmic Optics Terminology (GB/T 26397-2011, ISO 13666:1998, MOD) GB 39552:1-2020 Sunglasses and Sunglass Lenses Part 1: General Requirements (ISO 12312-1:2013, MOD) JJF1106 Calibration specification for transmittance measuring device of glasses products ISO /T S24348:2007 Test method for simulated wearing of metal and alloy frames of ophthalmic optical spectacles and nickel precipitation (Ophthalmicoptics-Spectacleframes-Methodforthesimulationofwearanddetectionofnickelre- leasefrommetalandcombinationspectacleframes)

3 Terms and definitions

The terms and definitions defined in GB/T 26397 apply to this document:

4 General

4:1 Test environment Unless otherwise specified, all tests in this section should be in an indoor environment with a temperature of (23±5)°C and a relative humidity of 30% to 80% get on: 4:2 Test location Unless otherwise specified, all transmittance tests, optical characteristic tests, and impact resistance tests in this section should be in the position where the sample is worn If the sample does not indicate the wearing position, the test should be carried out at the reference point: ......

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