Common path terahertz reflection/ATR imaging and its application

In this work, the common path imaging system was proposed by theoretically investigating the effect of incident angle on reflected and attenuated total reflection (ATR) imaging. On this basis, the reflection window and the ATR prism were designed with a suitable incident angle. The common path THz imaging system based on a THz gas laser was constructed by rapidly switching the imaging windows. Water droplets and glioma samples were experimentally tested by continuous common path THz imaging system. The results showed that the advantages of different imaging modes can be integrated by combining reflection and ATR imaging modes. The common path THz imaging system with high sensitivity and resolution shows great potential in biological application.