Figure 1
From: Terahertz in-line digital holography of human hepatocellular carcinoma tissue
Schematic layout of the setup for continuous-wave terahertz in-line digital holography.
An output terahertz laser beam of 11 mm in diameter was expanded to 22 mm in diameter by using two gold-coated off-axis parabolic mirrors, PM1 and PM2, with effective focal lengths of 76.2 mm and 152.4 mm, respectively.
