Electron Beam Detection Data via Photocathode Light Feedback
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Solution Overview
Problem
The adjustment of detection sensitivity in electron beam applicators is typically manual and requires a large dynamic range, which can be challenging when capturing entire images or performing adjustments like enlarging partial images.
Innovation Solution
A method that adjusts the quantity of light reaching the photocathode to set the signal intensity of the detection signal to a preset value, allowing for the creation of detection data and image composition even with a small dynamic range of detector sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual adjustment of detection sensitivity is performed, then detection results can be obtained, but a large dynamic range of detector sensitivity is required which increases device complexity
Solution Approach 1:
The patent changes the parameter being adjusted from detector sensitivity to light source intensity. By varying the quantity of light emitted by the light source, the system achieves different detection sensitivities without requiring the detector to have a large dynamic range. This resolves the contradiction by moving the adjustment point to a different component (light source rather than detector).
Solution Approach 2:
The system uses feedback control where the detection result is used to automatically adjust the light source intensity. The control unit monitors the detection signal and adjusts the light quantity to maintain optimal detection conditions, eliminating the need for manual adjustment and reducing the required detector dynamic range.
2Measurement precision
If detection sensitivity is adjusted manually, then image capture can be performed, but the process requires operator intervention which reduces productivity
Solution Approach 1:
The system performs self-adjustment of detection sensitivity through automatic feedback control. The control unit automatically adjusts the light source intensity based on detection results without requiring operator intervention, enabling the system to serve itself and maintain optimal detection conditions continuously.
Solution Approach 2:
Automatic feedback control loops continuously monitor detection signals and adjust light source intensity accordingly, eliminating manual intervention and improving productivity while maintaining measurement precision.
3Area of stationary object
If high detection sensitivity is used to capture entire images, then complete coverage is achieved, but signal intensity varies across regions making image composition difficult
Solution Approach 1:
The system dynamically adjusts the light source intensity during the imaging process. By varying the light quantity in response to detection results, the system compensates for signal intensity variations across different regions of the irradiation target, enabling accurate image composition while maintaining complete coverage.
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
Enables the acquisition of detection data on the irradiation region with a small dynamic range of detector sensitivity, reducing costs and preventing irradiation target damage, while maintaining accurate image composition.
Implementation Method 1
a photocathode configured to generate releasable electrons in response to receiving light from the light source
Implementation Method 2
an anode configured to form an electric field between the photocathode and the anode and extract the releasable electrons by the formed electric field to form an electron beam
Data Source
AI summary
An object is to provide a creation method of detection data based on a novel principle. The creation method includes: an electron beam irradiation step of irradiating an irradiation region with an electron beam; a detection step of detecting an emission quantity data from the irradiation region and generating a detection signal; a quantity of light adjustment step of adjusting a quantity of light reaching a photocathode from a light source so that a signal intensity of the detection signal is a preset value; a step of repeating the electron beam irradiation step, the detection step, and the quantity of light adjustment step until the signal intensity of the detection signal becomes the preset value; and a detection data output step of outputting the quantity of light adjustment data where the signal intensity of the detection signal is the preset value as detection data on the irradiation region.