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Publication No: IN202411023767 [India] Application No: IN202411023767
Title: A portable terahertz imaging system for non-destructive evaluation applications
Publication Date: 31-10-2025 File Date: 26-03-2024
Inventor(s): A Mercy Latha; Rishi Ranjan; N T Ravi; Vishant; Niraj Kumar
IPC Classification: H01S5/12, G01N21/3581, G01N21/3563, G01N21/01, H01S5/024
Abstract:
A portable terahertz (THz) imaging system having two laser modules (1, 2), fiber splitter-combiner (3), signal generation module (4), terahertz continuous wave source  (5), in-house developed and optimized - terahertz optics module (6), terahertz detector (7), lock-in amplifier (8), microcontroller (9), touch-screen display (10), sample  holder (11), two-dimensional motorized translation stages (12), distributed feedback (DFB) laser (13), a heat sink (14), laser driver (15), thermoelectric (TEC) controller  (16), first pair of lenses (17), another pair of plano-convex lenses (18), packaged terahertz non-destructive system (19), optical window (20), single point on the sample  (21). All system components are electronically controlled through a user-friendly graphical interface. The reflected intensities are plotted in real-time as a terahertz  image. The system is rugged and suitable for a wide range of applications spanning from industrial non-destructive evaluation, security screening, postal inspection,  food quality testing, cancer margin assessment, biological imaging, microplastic identification, porosity estimation, etc.
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