1.1 航空航天透明胶片承受由飞行、环境或其他因素引起的高应力。透明度附着点特别容易疲劳。这些疲劳区域通常受到阻碍或隐藏，无法进行正常检查。按照本规程所述技术，检查员应使用棱镜查看透明螺栓孔、空隙和分层附近的损伤，这些损伤由边缘条或框架隐藏。 1.2 本规程旨在提供可接受的方法，以对透明材料进行棱镜检查，尤其是飞机挡风玻璃和顶篷。 包括警告和经验教训，以帮助作者为特定应用编写量身定制的检查说明。 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====== 4.1 棱镜是观察正常观察中被遮挡或隐藏的区域的有用工具。例如，可以通过棱镜看到由边缘条或框架覆盖的透明螺栓孔、空洞和分层。一旦将棱镜靠在透明度上，用偶联剂润湿表面，就可以看到放置棱镜的下方区域。

1.1 Aerospace transparencies undergo high stresses induced by flight, environmental, or other factors. The transparency attachment points are especially subject to fatigue. These areas of fatigue are often obstructed or hidden from normal inspection. An inspector, following the techniques described in this practice, shall use a prism to view damage located near transparency bolt holes, voids, and delamination that are hidden by edge strips or frames. 1.2 The purpose of this practice is to provide acceptable methods for performing prism inspections of transparent materials with specific emphasis on aircraft windscreens and canopies. Caveats and lessons learned from experience are included to assist authors in writing tailored inspection instructions for specific applications. 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 ====== 4.1 Prisms are useful tools for viewing areas otherwise obstructed or hidden from normal viewing. For example, transparency bolt holes, voids, and delaminations that are covered by edge strips or frames can be seen through a prism. The prism, once put against the transparency, with a coupling agent to wet the surfaces, allows viewing of the area below where the prism is placed.