Optical sensor target recognition extracts the characteristic of target to perform target recognition after having acquired its reflection and radiation (spectra) characteristics.
光传感器目标识别则是在取得目标的反射特性和辐射特性（光谱）后提取其特征进行识别。
In this paper, the design principle and characteristic of an optical critical Angle sensor based on the internal reflection effect are introduced.
文中叙述了一种基于光学内反射效应的角度传感器的设计原理和特点。
A new reflection type hybrid optical sensor is designgd which has the ability to measure stably pulse wave-forms coming from the surface of the skin.
本文介绍一种新型反射型混合光学传感器，用它能稳定地检测从体表反射的脉搏波。
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