Pixelated Image Detector Photon Discrimination
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Solution Overview
Problem
Existing systems that detect high-energy photons using cameras require filters to block visible light, preventing the cameras from capturing images, thus a method to detect high-energy photons while allowing simultaneous image capture is needed.
Innovation Solution
A system utilizing a pixelated image detector exposed to both visible light and high-energy photons, with processors to discriminate between the two, allowing existing cameras to detect and quantify high-energy photons without covering the lens, enabling continuous image capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a filter or cover is placed over the camera lens to block visible light, then high-energy photons can be detected through the speckle effect, but the camera cannot capture still or video images
Solution Approach 1:
The patent segments the detection process by separating visible light detection from high-energy photon detection through temporal segmentation (alternating capture modes) and spatial segmentation (different pixel responses to different photon energies). This allows the camera to perform both imaging and radiation detection functions without physical filters.
Solution Approach 2:
The system dynamically switches between image capture mode and radiation detection mode, allowing the camera to adapt its function based on operational requirements. The processor dynamically identifies and distinguishes between speckle patterns caused by high-energy photons versus normal image data, enabling flexible dual functionality.
2Reliability
If the camera lens is covered to detect high-energy photons, then radiation detection capability is improved, but the camera loses its primary imaging function
Solution Approach 1:
The patent makes the camera universal by enabling it to perform both its original imaging function and new radiation detection function using the same hardware components. The processor analyzes pixel data to distinguish between normal image capture and radiation-induced speckle patterns, allowing the single device to serve multiple purposes without additional specialized equipment.
Solution Approach 2:
The camera system uses its existing sensor and processor to perform both imaging and radiation detection, making the system self-sufficient. The processor automatically identifies speckle patterns and distinguishes them from normal image data without requiring external filtering equipment or additional specialized components.
3Adaptability or versatility
If existing cameras are used for radiation detection without filters, then image capture is maintained, but discrimination between visible light and high-energy photons becomes difficult
Solution Approach 1:
The processor uses feedback mechanisms to continuously analyze pixel responses and distinguish between visible light and high-energy photons. By monitoring speckle patterns and comparing them against expected radiation signatures, the system dynamically adjusts its analysis to accurately identify high-energy photon events even in the presence of normal imaging data.
Solution Approach 2:
The system exploits parameter changes in pixel response characteristics when exposed to high-energy photons versus visible light. The processor analyzes variations in signal intensity, spatial distribution, and temporal patterns to discriminate between the two types of photons, transforming the difficulty of discrimination into a detectable signal difference.
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 use of existing cameras for radiation detection and measurement while maintaining their primary function of capturing images, enhancing surveillance capabilities without the need for filters.
Implementation Method 1
the high-energy photons (i.e., x-rays, or gamma rays) may directly interact with a sensor in the camera to produce a visible speckle effect... These white spots or 'specks' are caused by the high-energy photons interacting with the sensor to create a large number of electron-hole pairs in a localized region
Data Source
AI summary
A system for detecting high-energy photons includes a pixelated image detector exposed to visible light and high-energy photons, and the pixelated image detector generates one or more images from the exposure to the visible light and high-energy photons. The system further includes one or more processors operably connected to the pixelated image detector and configured to perform operations on the one or more images to discriminate between visible light and high-energy photons. A method for detecting high-energy photons includes exposing a pixelated image detector to visible light and high-energy photons and discriminating between the visible light that interacts with the pixelated image detector and the high-energy photons that interact with the pixelated image detector.