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GB/T 39552.2-2020 (GBT 39552.2-2020)

GB/T 39552.2-2020_English: PDF (GBT39552.2-2020)
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GB/T 39552.2-2020English1099 Add to Cart 7 days Sunglasses and sunglare filters -- Part 2: Test methods GB/T 39552.2-2020 Valid GB/T 39552.2-2020

Standard ID GB/T 39552.2-2020 (GB/T39552.2-2020)
Description (Translated English) Sunglasses and sunglare filters -- Part 2: Test methods
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard C73
Classification of International Standard 13.340
Word Count Estimation 59,518
Date of Issue 2020-12-14
Date of Implementation 2021-12-01
Adopted Standard ISO 12311-2013, NEQ
Drafting Organization China National Institute of Standardization
Administrative Organization Spectacle Optics Branch of National Optics and Photonics Standardization Technical Committee
Regulation (derived from) National Standard Announcement No. 28 of 2020
Issuing agency(ies) State Administration for Market Regulation, National Standardization Administration

GB/T 39552:2-2020
(Sunglasses and Sunglass Lenses Part 2: Test Methods)
ICS 13:340
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
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 Ji