Terahertz Imaging Scanning via Optical Beam Tracking

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current terahertz radiation imaging systems face limitations in scanning speed and image resolution due to the physical size and noise levels of detectors, requiring extensive arrays or slow mechanical scanning, which are impractical and costly.

Innovation Solution

A scanning system using a mobile component with a steering structure and actuator to steer terahertz radiation and an electromagnetic tracking beam, allowing for higher scanning speeds and eliminating the need for explicit positional data, enabling faster image capture and integration of data across multiple frames.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If a mechanical scanning system is used to deliver terahertz radiation to detectors, then scanning speed is improved, but device complexity increases due to the need for scanning mechanisms and positional data processing

Engineering Contradiction:

Improvescanning speedVSAvoidscanning mechanism complexity

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

The patent replaces mechanical scanning systems with a static detector array where the field of view is electronically scanned by computing pixel values from multiple detector readings. This eliminates physical scanning mechanisms while achieving the desired scanning speed through computational methods.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent divides the field of view into multiple virtual pixels, with each pixel corresponding to a specific location. By segmenting the imaging task into multiple detector readings that can be processed independently, the system achieves fast scanning without mechanical movement.

Inventive Principle:

Principle #1Segmentation

2Measurement precision

If multiple detectors are used to build up each pixel, then image resolution is improved, but device complexity and cost increase due to the extensive array required

Engineering Contradiction:

Improveimage resolutionVSAvoiddetector array complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent segments the imaging task by assigning different detectors to different spatial locations in the field of view. Each detector reads a specific region, and the system combines these readings to form the complete image, achieving high resolution without requiring every possible detector combination.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent uses a partial set of detector readings to construct each pixel, reading from multiple detectors but only using the necessary portions of their signals. This approach achieves sufficient resolution without the excessive complexity of using all possible detectors.

Inventive Principle:

Principle #16Partial or excessive action

3Ease of operation

If detectors are moved across the focal plane to scan the field of view, then scanning capability is achieved, but scanning speed is reduced due to the physical bulk of the detectors

Engineering Contradiction:

Improvescanning capabilityVSAvoidscanning speed

Core Design Contradiction:

Ease of operationVSSpeed

Solution Approach 1:

Instead of moving detectors across the focal plane, the patent inverts the approach by keeping detectors stationary and computationally scanning the field of view. The detectors remain fixed while the system creates a moving image by processing readings from multiple fixed detector positions.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent replaces physical detector movement with computational scanning methods. By using electronic processing to simulate the scanning effect, the system achieves scanning capability without the speed limitations imposed by mechanical movement of bulky detectors.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

This approach enables scanning at rates of 5-50 frames per second with improved resolution and reduced complexity, allowing for real-time imaging and flexible adjustment of image parameters for optimal detail capture.

Implementation Method 1

a mobile component adapted to steer terahertz radiation to provide a scanned terahertz radiation input to at least one terahertz radiation detector

Methodology Applied

Scientific EffectElectromagnetic radiation steering:

Implementation Method 2

the mobile component is also adapted to steer an electromagnetic tracking beam during scanning, for use in tracking movement of the mobile component

Methodology Applied

Scientific EffectElectromagnetic beam steering:

Implementation Method 3

at least one terahertz radiation detector... to provide a scanned terahertz radiation input to at least one terahertz radiation detector

Methodology Applied

Scientific EffectElectromagnetic energy detection:

Data Source

PatentUS8063366B2Scanning method and apparatus

Publication Date: 2011.11.22 THRUVISION LTD

AI summary

In a terahertz imaging system, a scanning component for scanning a field of view is tracked by an optical beam to obtain positional information. The optical tracking beam can be steered by the scanning component for example by reflection, refraction or diffraction. The steered tracking beam can then be detected by a spatially sensitive detector such as a charge-coupled device array. In a preferred embodiment, the output of a terahertz detector receiving terahertz radiation from the scanned field of view is used to modulate the tracking beam. This means that the spatially sensitive detector can provide an image directly derived from the scanning of the field of view by the terahertz radiation.