1.1 本试验方法涉及建筑玻璃光学各向异性的测量。 1.2 本试验方法是测量光学延迟的试验方法。它不是建筑玻璃规范。 1.3 光学延迟值可用于计算/预测热处理玻璃中存在的可见图案的数量，通常称为各向异性或彩虹色。 1.4 本试验方法适用于整体热处理（热强化和完全回火）透明、着色和涂层玻璃。 1.5 本试验方法不适用于: 1.5.1 漫射光的玻璃（即图案玻璃、喷砂玻璃、酸蚀玻璃等），或 1.5.2 非光学透明玻璃（即镜子、搪瓷或烧结玻璃）。 1.6 光学测量通过玻璃厚度进行集成，因此不能用于评估回火水平。它不提供有关表面应力或中心张力的信息。 1.7 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的值仅供参考，不被视为标准值。 1.8 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.9 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 可通过热处理或回火过程有意施加应力，以增加机械强度并改善玻璃板的安全特性。该工艺本身几乎不可能在全玻璃面板上实现均匀的残余应力分布。这些变化是由于玻璃类型（透明、着色、涂层等）、制造、板材几何形状、加热、淬火和冷却的变化。尽管不均匀性水平可能不会干扰玻璃样品的整体机械性能，但它可以产生称为各向异性的光学图案（通常称为豹斑）。 今天，为了评估这种应力均匀性，人们可以使用主观的、非标准化的方法，通过极化滤波器或使用偏光镜进行观察。本试验方法提供了在每个热处理玻璃板的多个位置测量物理参数的指南，即与局部残余应力直接相关的光学延迟。 5.2 通过该测试方法，可以以无损方式在线获得所有玻璃的延迟值图。 然后可以使用这些信息: 5.2.1 由回火操作员调整热处理过程的设置，以优化/调整热处理玻璃板上的光学延迟水平及其均匀性。 5.2.2 提供一种标准化方法来测量每个玻璃面板的光学延迟值，可以在需要时存档和通信。 5.2.3 由客户和其他利益相关者制定/编写可独立验证的光学延迟值（而非图案可见性）规范。 5.3 该测试方法也可用于离线评估任何热处理玻璃的光学延迟水平和均匀性，用于质量保证或其他目的。

1.1 This test method addresses the measurement of optical anisotropy in architectural glass. 1.2 This test method is a test method for measuring optical retardation. It is not an architectural glazing specification. 1.3 The optical retardation values may be used to calculate/predict the amount of visible pattern, commonly known as anisotropy or iridescence, present in heat-treated glass. 1.4 This test method applies to monolithic heat-treated (heat-strengthened and fully tempered) clear, tinted and coated glass. 1.5 This test method does not apply to: 1.5.1 Glass that diffuse light (that is, patterned glass, sand blasted glass, acid etched, etc.), or 1.5.2 Glass that is not optically transparent (that is, mirrors, enameled or fritted glass). 1.6 The optical measurement is integrated through the glass thickness, and therefore cannot be used to assess the level of tempering. It does not give information on the surface stress or center tension. 1.7 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.9 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Stress may be applied intentionally through a heat treatment or tempering process to increase mechanical strength and improve safety characteristics of glass sheets. The process itself makes it practically impossible to achieve a homogenous residual stress profile over a full glass panel. These variations are due to variations in type of glass (clear, tinted, coated, etc.), the fabrication, sheet geometry, heating, quenching, and cooling. Even though the level of inhomogeneity may not interfere with the global mechanical property of the glass sample, it can produce optical patterns called anisotropy (often commonly referred to as leopard spots). Today to evaluate this stress homogeneity people may use the subjective, non-standardized method of viewing through a polarized filter or employing a polariscope. The present test method provides guidelines for measuring a physical parameter, the optical retardation, directly linked to the local residual stress, at many locations on each heat-treated glass sheet. 5.2 Through this test method one can obtain in a non-destructive manner, on-line to the tempering furnace equipment, a map of the retardation value of all glasses. That information can then be used: 5.2.1 By the tempering operator to adjust the settings of the heat treatment process to optimize/tune both the levels optical retardations and its homogeneity on heat treated glass sheets. 5.2.2 To provide a standardized way to measure optical retardation values for each glass panel that can be archived and communicated when desired. 5.2.3 By customers and other stakeholders to develop/write specifications for the optical retardation values (not the visibility of the pattern) that are independently verifiable. 5.3 This test method can also be used off-line to evaluate the optical retardation level and homogeneity of any heat-treated glass, for quality assurance or other purposes.