Prism coupling system and method using different wavelengths

Prism coupling systems and methods include the step of using a prism coupling system to collect initial TM and TE mode spectra of a chemically strengthened article having a refractive index profile having a near-surface spike region and a deep region. The prism coupling system has a light source configured to generate a sequential measurement beam or reflected beam having different measurement wavelengths. Different measurement wavelengths produce different TM and TE mode spectra. The light source may include a plurality of light emitting elements and a filter, or a broadband light source and a filter. Optical filters may be sequentially inserted into an input optical path or an output optical path of the prism coupling system. 棱镜耦合系统和方法包括以下步骤：使用棱镜耦合系统来收集具有折射率分布的化学强化制品的初始的TM和TE模式光谱，该折射率分布具有近表面尖峰区域和深部区域。该棱镜耦合系统具有配置为产生具有不同的测量波长的顺序测量光束或反射光束的光源。不同的测量波长产生不同的TM和TE模式光谱。该光源可以包括多个发光元件和滤光器，或宽带光源和滤光器。可以将滤光器依次安插到该棱镜耦合系统的输入光路径或输出光路径中。