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QB/T 2506-2017 English PDF (QBT2506-2017)

QB/T 2506-2017 English PDF (QBT2506-2017)

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QB/T 2506-2017: Uncut finished spectacle lenses. Optical hard resin lenses

This Standard specifies the terms and definitions, classification, requirements, test methods, inspection rules, marking, package, transportation, storage of optical hard resin lenses. This Standard is applicable to the spectacles lenses made of polymer materials with optical property.
QB/T 2506-2017
QB
NATIONAL LIGHT INDUSTRY STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
ICS 11.040.70
Classification No.. Y 89
Record No.. 57027-2017
Replacing QB 2506-2001
Uncut Finished Spectacles Lenses ?€?
Optical Hard Resin Lenses
???????????? ??????????????????
ISSUED ON. JANUARY 09, 2017
IMPLEMENTED ON. JULY 01, 2017
Issued by. Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 5
4 Classification ... 7
5 Requirements ... 7
6 Test Methods ... 11
7 Inspection Rules ... 14
8 Marking and Package ... 15
9 Transportation and Storage ... 17
Appendix A (Normative) UV Transmittance and Blue Light Transmittance
Calculated Spectral Function ... 18
Appendix B (Normative) Spectral Distribution of Spectral Radiation in the Infrared Band ... 20
Appendix C (Normative) Spectral Luminous Efficacy Function in Visible Light Band ... 22
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard replaced QB 2506-2001 Optics Resin Spectacles Lenses.
Compared with QB 2506-2001, besides the editorial modifications, this Standard has the major technical changes as follows.
--- Increase the material properties of photochromic spectacles lenses and progressive power spectacles lenses;
--- Add lens transmittance and classification, lens blue light transmittance, lens infrared transmittance;
--- Add the lens light-resistant irradiation performance;
--- Adjust the lens tolerance of refractive index into ??0.005;
--- Adjust the lens abbe number tolerance into ??5%.
This Standard was proposed by China Light Industry Council.
This Standard shall be under the jurisdiction of National Center for Standardization of Glasses.
Drifting organizations of this Standard. Carl Zeiss Optical (Guangzhou) Co., Ltd., Donghua University, China National Inspection and Testing Center for Ophthalmic Optics Glass and Enamel Products, Shanghai Yishilu Optical Co., Ltd., Shanghai Conant Optics Co., Ltd., Bizhen Optical (Shanghai) Co., Ltd., Jiangsu Wanxin Optical Co., Ltd., Shanghai Leez Optical Glasses Co., Ltd., Shanghai Mingyue Optics Glasses Co., Ltd., Rodenstock Trading (Shanghai) Co., Ltd., and Riccino (Xiamen) Optical Inc. Chief drafting staff of this Standard. Tang Lingling, Nie Xiaoling, Huang Hongliang, Zhang Peng, Cao Genting, Ouyang Xiaoyong, Tian Ling, Ye Jiayi, Xie Gongxing, Jin Xiang, Gao Qi, Wu Guoqing, and Zhou Xianjian.
The historical edition replaced by this Standard is as follows.
--- QB 2506-2001.
Uncut Finished Spectacles Lenses -
Optical Hard Resin Lenses
1 Scope
This Standard specifies the terms and definitions, classification, requirements, test methods, inspection rules, marking, package, transportation, storage of optical hard resin lenses.
This Standard is applicable to the spectacles lenses made of polymer materials with optical property.
2 Normative References
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document.
GB/T 2828.1 Sampling Procedures for Inspection by Attribute - Part 1. Sampling Schemes Indexed by Acceptance Quality Limit(AQL) for Lot-by-Lot Inspection GB/T 8427 Textiles - Tests for Color Fastness - Color Fastness to Artificial Light. Xenon Arc Fading Lamp Test
GB 10810.1 Uncut Finished Spectacle Lenses - Part 1. Single-Vision and
Multifocal Lenses
GB 10810.2 Uncut Finished Spectacle Lenses - Part 2. Progressive Power
Spectacle Lenses
GB 10810.3 Spectacle Lenses and Related Eye Wear-Transmittance
Specifications and Test Methods
GB 10810.4 Uncut Finished Spectacle Lenses - Part 4. Specifications and Test Methods for Anti-Reflective Coatings
GB 10810.5 Uncut Finished Spectacle Lenses ?€? Part 5. Requirements of
Abrasion-Resistant for Spectacle Lends Surface
GB/T 26397 Ophthalmic Optics ?€? Terminology
such mark and the actual polarized surface direction shall be ??3??.
5.4.2.4 Claimed transmittance
5.4.2.4.1 When the lens claims that its visible light transmittance is of x%, then its visible light transmittance ??v shall be no less than (x-0.5)%.
5.4.2.4.2 When the lens claims that its UV absorption ratio is x%, then its UV transmittance ??SUV shall be no greater than (100.5-x)%.
5.4.2.4.3 When lens claims that its UV transmittance is less than x%, then its UV transmittance ??SUV shall be no greater than (x+0.5)%.
5.4.2.4.4 When lens claims that the cut-off wavelength characterizes its UV- protection properties; the transmittance ??(??) in the spectral range below its cut-off wavelength (including the cut-off wavelength) shall be no greater than 2.0%. NOTE. generally, the manufacturer shall use UV380, UV400 to indicate the cut-off wavelength. If the UV380 is marked, namely, the transmittance ??(??) in the spectral range of 280nm~380nm is required to be no greater than 2.0%.
5.4.2.5 Blue light property
5.4.2.5.1 When lens claims that it has blue light protection function.
For Class-0 lens, the blue light transmittance ??sb shall be no greater than 0.93??v; For Class-1~Class-4 lenses, the blue light transmittance ??sb shall be no greater than ??v.
5.4.2.5.2 When lens claims that its blue light absorption ratio is x%, then its blue light transmittance ??sb shall be no greater than (100.5-x)%.
5.4.2.5.3 When lens claims that its blue light transmittance is less than x%, then its blue light transmittance ??sb shall be no greater than (x+0.5)%.
5.4.2.5.4 When lens claims that it has infrared radiation protection function, then its infrared spectral transmittance ??SIRA shall be no greater than ??v.
5.5 Refractive index
The tolerance between the measured value and nominal value shall be ??0.005. 5.6 Abbe number (dispersion coefficient)
The tolerance between the measured value and nominal value shall be ??5%. 5.7 Light irradiation proof
provisions of GB 10810.2.
6.3 Anti-reflective film property
The anti-reflective film property of lenses shall be inspected as per the provisions of GB 10810.4.
6.4 Surface wear resistance
The surface wear resistance of lenses shall be inspected as per the provisions of GB 10810.5.
6.5 Transmittance property
The transmittance property of lenses shall be inspected as per the provisions of GB 10810.3.
6.6 Refractive index, Abbe number (dispersion coefficient)
6.6.1 Device
The V prism refractor with measurement accuracy no less than 5??10-5, the measuring device that is equivalent to the method described in this section can also be used. 6.6.2 Steps
The test steps are as follows.
a) Process the sample, so that at least two sides are perpendicular to each other the right-angle accuracy is of 90????1?€?;
b) Put the standard block with the same materials as the V prism into the V-shaped groove;
c) Turn the telescope so that the optical axis is aligned with the direction of the outgoing light; read the zero-angle value ??1 from the micro-reading system; d) Replace with the sample, turn the telescope again to align with the beam direction; read the angle value ??2;
e) The difference between two angles ???? (???? =??2 - ??1); then check the conversion table between angle ?? and refractive index; the refractive index of the sample can be obtained;
f) Introduce the corresponding refractive indexes of different bands into the formula to calculate the corresponding Abbe number.
6.7 Light radiation proof
b) heat source;
c) Thermocouple;
d) Temperature display.
6.8.2 Test steps
The test steps are as follows.
a) Heating one end of the steel bar to (650??20) ??C, the heating length is at least 50mm; measure the temperature at a distance ...

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