X-Ray Radioscope With Synchronized CCD Scanning for Low-Dose Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional X-ray radioscopy methods for inspecting micro electric parts in carrier-tape reels are inefficient due to long processing times and parallax-induced image artifacts, especially when using low X-ray doses.
Innovation Solution
An X-ray radioscope with a radially emitting X-ray source, planar CCDs, and a synchronized movement unit that moves the sample and CCDs relative to each other, ensuring 500 or more pixels along the movement direction, and employing a time-delay integration method to enhance sensitivity and reduce image overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the tiling method is used to image the large reel in high resolution, then the spatial resolution is improved, but the image processing time increases significantly
Solution Approach 1:
The patent transitions from a 2D sensor to a 3D volumetric detector that captures the entire reel volume simultaneously. This dimensional change allows the entire large reel to be imaged in a single acquisition without requiring time-consuming tiling and stitching of multiple 2D images, thus maintaining high spatial resolution while dramatically reducing processing time.
2Measurement precision
If the carrier tape is wound up in another reel and wound back to measure length, then the length measurement is achieved, but the tape failure risk increases
Solution Approach 1:
The patent replaces the mechanical winding and unwinding process with a non-contact X-ray imaging system. The X-ray radioscope captures images of the tape in its stationary state on the reel, allowing length and part count measurements without any mechanical manipulation that could cause tape failure.
3Measurement precision
If the TDI sensor with multiple line sensors is used to increase sensitivity, then the signal-to-noise ratio is improved, but the image acquisition complexity increases
Solution Approach 1:
The patent merges multiple line sensors into a single integrated volumetric detector that performs the function of many stacked line sensors. This unified detector achieves high signal-to-noise ratio through its three-dimensional detection capability without requiring complex arrays of individual line sensors, thereby reducing overall system complexity while maintaining sensitivity.
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
The X-ray radioscope achieves short image acquisition duration and high sensitivity with low X-ray doses, effectively suppressing image overlap and improving signal-to-noise ratio.
Implementation Method 1
an X-ray source that radially emits X-rays
Implementation Method 2
a planar CCD including CCDs planarly arranged, the planar CCD being placed away from the sample holder to detect X-ray transmitted through the sample
Data Source
AI summary
An X-ray radioscope includes: an X-ray source that radially emits X-ray; a sample holder configured to hold a sample, the sample holder placed in front of the X-ray source in order for the sample to be irradiated by X-ray emitted from the X-ray source; a planar CCD including CCDs planarly arranged, the planar CCD being placed away from the sample holder to detect X-ray transmitted through the sample such that the planar CCD obtains X-ray transmission image of the sample; and a movement unit configured to move the planar CCD and the sample holder relative to each other in synchronization with obtaining the X-ray transmission image by the planar CCD, wherein the planar CCD has 500 or more pixels along the movement direction relative to the sample.