THz Imaging with Amplitude-Division Interference
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Solution Overview
Problem
Current THz imaging technologies lack intrinsic 3D imaging ability, despite their capability to obtain 2D and 3D structure information through time interval analysis of THz pulses.
Innovation Solution
A device and method combining THz technology with amplitude-division interference technology, where THz pulses are split into reference and signal beams with an optical path difference less than a wave train length, allowing for interference and generation of electrical signals containing sample information, enabling intrinsic 3D imaging with high resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional THz imaging technology is used, then 2D image and 3D structure information can be obtained, but intrinsic 3D imaging ability is lacking
Solution Approach 1:
The patent combines THz technology with amplitude-division interference technology to create an imaging system that achieves intrinsic 3D imaging capability. The interferometer splits THz pulses into reference and signal beams, and their interference pattern contains encoded 3D information that can be directly imaged without complex tomographic reconstruction, thus resolving the contradiction between 3D imaging ability and system complexity.
Solution Approach 2:
The patent introduces a new dimension of interference pattern analysis to traditional THz imaging. By capturing the amplitude-division interference pattern, the system transforms 2D THz images into 3D information encoding, enabling real 3D imaging capability while maintaining relatively simple system architecture compared to tomographic methods.
2Manufacturing precision
If THz pulses are split into reference and signal beams with small optical path difference, then high resolution 3D imaging is achieved, but system complexity increases
Solution Approach 1:
The interferometer divides the THz pulse into two separate beams (reference and signal beams) with controlled optical path differences. This segmentation allows the system to encode 3D information in the interference pattern while maintaining manageable system complexity through modular beam splitting and detection.
3Measurement precision
If amplitude-division interference technology is combined with THz technology, then real 3D image with high resolution is obtained, but device complexity increases
Solution Approach 1:
The interferometer-based THz imaging system serves multiple functions: it captures 3D structural information, provides high resolution imaging, and maintains non-destructive testing capabilities. The same interference measurement process yields both 2D and 3D information simultaneously, improving measurement precision while avoiding the need for separate complex imaging systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides real 3D imaging with high resolution and signal-to-noise ratio (SNR), overcoming the limitations of prior art by enabling non-destructive, real-time, and high-resolution 3D imaging of samples.
Implementation Method 1
the reference beam and the signal beam interfere with each other, then THz pulse amplitude-division interference signals containing sample information are generated
Implementation Method 2
THz radiation can penetrate most of non-polarity dielectric, so the THz radiation can be acted as information carrier in imaging technology
Implementation Method 3
the detector receives the THz pulse amplitude-division interference signals and generates electrical signals containing the sample information
Data Source
AI summary
This invention provides a device and a method for THz imaging to obtain real 3D image of sample and achieve high resolution, by combining THz technology and amplitude-division interference technology.