internal reflection element

基本解释

Alternatively, the first stage may be another type of lens element, such as a Fresnel lens or a total internal reflection (TIR) lens.
或者，第一级可能是另一类型的透镜元件，诸如菲涅耳透镜或全内反射（TIR）透镜。
The reference 197A signifies that the substance under examination is intimately in contact with an internal reflection element for attenuated total reflectance (ATR) analysis.
提到意味着该待检物质紧密地接触用于衰减全反射（ATR）分析的内反射元件。