Calibration Assembly for Terahertz Scanner Using Transmissive Plates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Terahertz radiation scanners face challenges in determining optimal intensity and resolution settings for effective security screening, as varying intensities and resolutions affect detection precision, leading to unclear images.
Innovation Solution
A calibration assembly comprising light-permeable plates of different sizes and a reflection plate with varying hole sizes, arranged to form step-shaped and layered structures, allows for the transmission and reflection of light at specific frequencies, enabling the calibration of terahertz radiation scanners by analyzing testing images produced.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the intensity of terahertz radiation is increased to improve detection precision, then the image quality improves, but the cost of calibration equipment increases
Solution Approach 1:
The patent uses simple, inexpensive light-permeable plates with different transmittances and reflection plates with different reflectivities as calibration objects. These are much cheaper than traditional photometers and can be easily replaced or adjusted to calibrate different intensity settings of the terahertz radiation scanner.
Solution Approach 2:
The patent introduces light-permeable plates and reflection plates as intermediary calibration objects that mediate between the terahertz radiation source and the detector. These plates provide known transmittance and reflectivity values that enable calibration without requiring expensive reference equipment.
2Measurement precision
If multiple calibration objects with different properties are used to calibrate intensity and resolution, then the calibration accuracy improves, but the time required for calibration increases
Solution Approach 1:
The patent combines multiple calibration functions into a single integrated calibration assembly. The light-permeable plates and reflection plates are arranged together to simultaneously provide calibration for both intensity and resolution measurements, allowing both parameters to be calibrated in one operation rather than sequentially.
Solution Approach 2:
The calibration assembly is designed to serve multiple calibration purposes simultaneously. The same light-permeable plates and reflection plates are used for both intensity calibration and resolution calibration, making the calibration system multi-functional and efficient.
3Measurement precision
If the resolution of the scanner is increased to improve image quality, then the detection precision improves, but the calibration complexity increases
Solution Approach 1:
The patent segments the calibration assembly into distinct light-permeable plates and reflection plates with specific, known properties. Each plate has defined transmittance or reflectivity values that serve as reference standards, simplifying the calibration process for high-resolution scanning by providing discrete, measurable reference points.
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 solution efficiently determines the luminous intensity, resolution, and conveyor speed of terahertz radiation scanners, improving calibration efficiency and replacing the need for expensive photometers, thereby enhancing image quality and cost-effectiveness.
Implementation Method 1
The light-permeable areas are configured to be permeable to a light having a predetermined frequency
Implementation Method 2
The reflection plate is configured to block the light having the predetermined frequency
Data Source
AI summary
The disclosure provides a calibration assembly for a scan device. The calibration assembly includes a plurality of light-permeable plates and a reflection plate. The light-permeable plates are different in size, and the light-permeable plates are arranged along thicknesses directions thereof to form a step shape. The light-permeable plates define a plurality of light-permeable areas that respectively have different numbers of layers of the light-permeable plates inversely proportional to transmittances of the light-permeable areas. The light-permeable areas are configured to be permeable to a light having a predetermined frequency. The reflection plate is disposed at a side of one of the light-permeable plates in the thickness direction thereof. The reflection plate has a plurality of first holes having different sizes, and the reflection plate is configured to block the light having the predetermined frequency. The disclosure also provides a calibration system having the calibration assembly.