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GB/T 42222-2022: Laboratory glassware - Testing method and classification of optical uniformity
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| GB/T 42222-2022 | English | 259 |
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Laboratory glassware - Testing method and classification of optical uniformity
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GB/T 42222-2022
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Basic data | Standard ID | GB/T 42222-2022 (GB/T42222-2022) | | Description (Translated English) | Laboratory glassware - Testing method and classification of optical uniformity | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | N64 | | Classification of International Standard | 81.040.01 | | Word Count Estimation | 12,195 | | Date of Issue | 2022-12-30 | | Date of Implementation | 2023-07-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 42222-2022: Laboratory glassware - Testing method and classification of optical uniformity---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 81.040.01
CCSN64
National Standards of People's Republic of China
Test method and classification of optical uniformity of glass instruments
optical uniformity
2023-07-01 implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
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 contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by China National Light Industry Council.
This document is under the jurisdiction of the National Standardization Technical Committee for Glass Instruments (SAC/TC178).
This document is drafted by. Beijing University of Technology, Beijing Huayuda Glass Application Technology Research Institute, Beijing Xuhui Xinrui Technology Co., Ltd.,
Beijing Pharmaceutical Packaging Materials Inspection Institute, Shandong Linuo Special Glass Co., Ltd., Sichuan Tianma Glass Co., Ltd., Sichuan Huajing Glass
Co., Ltd., Qi County Comprehensive Inspection and Testing Center (National Glassware Product Quality Supervision and Inspection Center < Shanxi>).
The main drafters of this document. Tian Yingliang, Yang Jingting, Lun Xiaoyu, Yuan Chunmei, Zhang Haixiang, Wu Jian, Wen Bo, Yang Ziqing, Wang Hui, Yang Hongde,
Liu Jianzhang, Zheng Jiabin, Zhao Zhiyong, Su Wei, Zhang Cuifu, Ganlu.
Test method and classification of optical uniformity of glass instruments
1 Scope
This document describes the test method for optical uniformity of glass instruments and gives the optical uniformity classification of glass instruments.
This document is applicable to optical uniformity testing and grading of glass instrument products, and other transparent hollow glass products should be implemented as a reference.
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document.
GB/T 6682 Analytical laboratory water specifications and test methods
GB/T 29159 Glass tubes for all-glass vacuum solar collector tubes
GB/T 35599 Terminology for Appearance Defects of Instrument Glass and Its Products
3 Terms and Definitions
GB/T 35599, GB/T 29159 and the following terms and definitions apply to this document.
3.1
Interference color interferencecolor
The color change of the heterogeneous body due to the change of the optical path difference under the microscope condition of orthogonally polarized light.
3.2
Tensile stress tensile stress
The force exerted on an object by stretching.
3.3
Uniformity test uniformitytest
The state of interference color and interference fringes when orthogonally polarized light passes through a glass sample is used to evaluate the quality of glass uniformity.
3.4
The color, width, position and outer tension of the interference color and interference fringes presented by testing the stress and fringes of the glass sample section
The force shall be graded and used as the evaluation index for the uniformity of the glass sample.
4 Test Principle
When a beam of parallel polarized light is incident on a heterogeneous glass with stress and stripes, the polarized light is decomposed into vibration directions perpendicular to each other.
The two beams of light are respectively defined as the x direction and the y direction, and their propagation speeds are cx and cy respectively, because the propagation speeds of the two beams of light in the glass are different
At the same time, there will be an optical path difference δ. A full-wave plate with an optical path difference of 565nm is inserted between the cross-polarized microscope light paths, and the background color of the field of view is
The color is purple, and the stress and stripes in the glass present different colors of interference colors and interference fringes. According to the color of interference colors and interference fringes, the
And the shape, position and thickness of interference fringes are used to grade and evaluate the glass uniformity.
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