infrared millimeter terahertz waves scientific conferences

Pulsed terahertz (THz) broadband spectroscopy was applied to investigate ex vivo rabbit cornea scar tissues. Scars with different density were created on four corneal samples while untouched corneas were used as control. Time domain spectroscopy and reconstructed images illustrated the scar tissue density and give out depth variation distribution profiles. Calculated absorption coefficient displayed extra absorption peaks compared with control corneas and refractive index showed the optical property changes at the cornea scar location. THz spectroscopy and imaging demonstrated advantages in depicting spatial distribution and composition changes of corneal scar compared with hyperspectral techniques in visible and near infrared region.