Advances in CODE V design in terahertz imaging system

Abstract

 The band of terahertz (THz) spans from microwave to infrared bands, which belongs to the transition band from macro-electronics to micro-photonics, possessing peculiarities different from electromagnetic waves in other bands. THz technology with the characteristics of high penetration, broadband, high resolution and transient are employed in various fields, such as space remote sensing, nondestructive detection biomedical imaging and near-field microscopy. These broad applications, in turn, provide incentive to further improve the basic performance of THz technology. Aiming at the application of terahertz technology in the imaging field, this novel mainly discussed the basic principle, key devices, system composition, technical advantages and future development trend of terahertz imaging system. The application status of CODE V optical design software in designing scanning lens systems for terahertz imaging, such as free-form surfaces, non-free surfaces and multi-lens groups are further discussed in this paper.