Terahertz Imaging Focus and Illumination Angle Control by Distance
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Solution Overview
Problem
Handheld terahertz imaging apparatuses face challenges in adjusting illumination angles and focus due to varying distances from the subject, leading to time-consuming manual adjustments and blurred images.
Innovation Solution
An imaging apparatus with orientation changing units for the illumination and imaging elements, and a focus changing unit, controlled by a processor to automatically adjust angles and focus based on set distance information, allowing simultaneous adjustment of illumination and focus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual adjustment of illumination angle and focus is performed, then the user can adapt to different distances, but the time required for image capture increases significantly
Solution Approach 1:
The system pre-calculates and stores the optimal illumination angle and focus position for various subject distances. When a distance is input, the corresponding pre-computed parameters are immediately applied, eliminating the need for real-time manual adjustment while maintaining adaptability to different shooting scenarios.
Solution Approach 2:
The patent replaces manual mechanical adjustment with an automated computational system. The processor calculates the required illumination angle and focus position based on input distance, substituting the manual trial-and-error adjustment process with automatic computational control.
2Ease of operation
If the illumination angle is adjusted first, then the subject becomes visible, but the focus cannot be set in advance requiring additional adjustment time
Solution Approach 1:
The system pre-calculates both the illumination angle and focus position simultaneously based on the subject distance before image capture begins. This allows both parameters to be set in advance rather than sequentially, eliminating the waiting time between illumination adjustment and focus setting.
3Adaptability or versatility
If the distance between imaging apparatus and subject varies, then imaging flexibility is improved, but the illumination angle must be readjusted each time
Solution Approach 1:
The patent replaces manual illumination angle adjustment with an automated system. The processor calculates the appropriate illumination angle based on the subject distance and automatically controls the illumination unit's orientation, substituting manual mechanical adjustment with computational control.
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
Facilitates rapid and accurate image capture by automatically adjusting illumination angles and focus without the need for manual recalibration, reducing the time required to obtain clear images.
Implementation Method 1
Since terahertz waves have a relatively longer wavelength than the surface irregularities of the subject, terahertz waves irradiated onto the subject surface do not scatter but undergo specular reflection
Implementation Method 2
an image forming optical system configured to include a focus lens and form an image of a terahertz wave reflected by a subject on the imaging element
Data Source
AI summary
An imaging apparatus includes a light emitting element that irradiates a subject with a terahertz wave, an imaging element that detects a reflected terahertz wave, an image forming optical system that includes a focus lens and forms an image of a terahertz wave on the imaging element, a support member that supports the light emitting element; an orientation changing unit that changes an orientation of the support member, a focus changing unit that changes the position of the focus lens; an input unit to which set distance information is input, and an execution unit that executes the change of the orientation of the support member and the change of the position of the focus lens based on the set distance information.