1.1 本试验方法涵盖了在固定波长（λ）和温度下测量和比较折射率（η）的程序( T ) ( )从已知来源的玻璃中提取碎片。 1.2 本试验方法不包括光学色散测量或折射率测量( )在除钠D线以外的任何其他波长( ). 该方法在589 nm处使用窄带通滤波器，但可以使用所述方法使用其他滤波器，允许 在其他波长下确定，因此也允许计算色散值。 1.3 测定的替代方法 参考文献中列出了( 1- 5. ). 2. 1.4 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.5 本标准不能取代通过教育、培训和经验获得的知识、技能或能力，并由具有此类纪律的个人结合专业判断使用- 特定的知识、技能和能力。 1.6 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。 1.7 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====== 4.1 该测试方法有助于准确测量 从各种各样的玻璃样品中 范围为1.48–1.55。 4.2 应认识到，表面碎片的测量，特别是浮法玻璃样品的测量，可能会导致折射率值不同于同一碎玻璃源内部（例如，大块）碎片的折射率值 ( 5. ) . 4.3 本试验方法的精度应在将其作为验证方案一部分的每个实验室中确定（见第节） 9 ). 4.4 应该认识到，该技术在匹配点温度下测量玻璃的折射率，该温度将高于环境温度，因此可能会产生不同的折射率 通过其他方法获得的值，这些方法测量室温下的折射率。

1.1 This test method covers a procedure for measuring and comparing the refractive index (η) at a fixed wavelength (λ) and temperature ( T ) ( ) of glass from known sources to recovered fragments from a questioned source. 1.2 This test method does not include the measurement of optical dispersion or the measurement of refractive index ( ) at any other wavelength other than the Sodium D line ( ). This method employs a narrow band pass filter at 589 nm, but other filters could be employed using the described method, allowing the to be determined at other wavelengths, and therefore, also allowing for the dispersion value to be calculated. 1.3 Alternative methods for the determination of are listed in Refs ( 1- 5 ). 2 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 This standard cannot replace knowledge, skills, or abilities acquired through education, training, and experience and is to be used in conjunction with professional judgment by individuals with such discipline-specific knowledge, skills, and abilities. 1.6 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. 1.7 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 ====== 4.1 This test method is useful for accurate measurement of from a wide variety of glass samples, whose ranges from 1.48–1.55. 4.2 It should be recognized that measurement of surface fragments, especially from float glass samples, can result in refractive index values which are different than the refractive index values of fragments from the interior of (for example, bulk) the same broken glass source ( 5 ) . 4.3 The precision of this test method shall be established in each laboratory that employs it as part of the validation protocol (see Section 9 ). 4.4 It should be recognized that this technique measures the refractive index of the glass at the match point temperature, which will be higher than ambient temperature, and thus, may give different values from those obtained by other methods, which measure the refractive index at room temperature.