High-speed terahertz color imaging using a 100 kHz line scan camera

Area of Science:

• Optics and Photonics
• Spectroscopy
• Imaging Technology

Background:

• Terahertz (THz) imaging offers non-destructive inspection capabilities.
• Conventional 2D THz imaging methods are slow, limiting practical applications.
• Spectral information within THz images can provide detailed material characterization.

Purpose of the Study:

• To develop a high-speed two-dimensional (2D) terahertz (THz) color imaging system.
• To significantly reduce imaging acquisition time compared to existing methods.
• To enable practical, rapid, non-destructive inspection using THz spectral data.

Main Methods:

• Implemented a system performing 1D spatial scans for 2D image acquisition.
• Utilized THz time-domain spectroscopy (THz-TDS) for spectral data collection at each pixel.
• Achieved simultaneous spectral data acquisition across spatial dimensions.

Main Results:

• Developed a high-speed 2D THz color imaging system.
• Acquired images with 750 × 1000 pixels (13 mm × 25 mm) with 1.5 mm spatial resolution.
• Achieved imaging acquisition in under 10 seconds, two orders of magnitude faster than conventional methods.

Conclusions:

• The developed system offers a significant speed improvement for 2D THz color imaging.
• This high-speed imaging technology is suitable for practical, real-time applications.
• Potential applications include non-destructive and non-invasive inspection of industrial products and biological tissues.