1.1 本试验方法包括测量由平坦透明部件（如商用或军用飞机挡风玻璃、顶篷或客舱窗户）施加的光线的光学角度偏差。 1.2 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。 1.2.1 例外情况- 括号中给出的值仅供参考。此外，打印尺寸以英寸-磅为单位。 1.3 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。 1.4 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 使用这些方法可以测量平坦透明部件（如飞机挡风玻璃、顶篷、座舱窗户和遮阳板）的光学角度偏差。挡风玻璃或遮阳板中的角度偏差可能会导致物体出现在与实际位置不同的位置。角度偏差的变化可用于表征透明零件中的变形和放大。此外，从挡风玻璃或其他透明介质的典型右眼和左眼位置进行的角度偏差测量可用于确定双眼视差差（见测试方法 F1181 ).

1.1 This test method covers the measurement of the optical angular deviation of a light ray imposed by flat transparent parts such as a commercial or military aircraft windshield, canopy, or cabin window. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.2.1 Exceptions— The values given in parentheses are for information only. Also, print size is provided in inch-pound measurements. 1.3 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. 1.4 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 The optical angular deviation of flat transparent parts, such as aircraft windshields, canopies, cabin windows, and visors, can be measured using these methods. Angular deviation in a windscreen or visor can cause objects to appear at a location different from where they actually are. Variations in angular deviation can be used to characterize distortion and magnification in transparent parts. Also, angular deviation measurements made from the typical right and left eye positions for a windscreen or other transparent medium can be used to determine binocular disparity differences (see Test Method F1181 ).