Mono-color Image Retrieval for High-Resolution Inspection
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Solution Overview
Problem
Conventional inspecting technologies using multi-color image-retrieving modules face issues with reduced resolution and accuracy due to color filters and varying reflection rates from different materials and angles, making it difficult to distinguish colors and obtain accurate profiles of electronic components.
Innovation Solution
An inspecting device and method utilizing a mono-color image-retrieving module with multiple illuminating modules that generate lights of different colors at specific angles, allowing for sequential retrieval of mono-color images to improve resolution and color saturation by avoiding color filter ambiguity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a multi-color image-retrieving module is used to retrieve images, then color information can be obtained, but resolution is reduced due to color filters
Solution Approach 1:
The patent divides the color information acquisition into separate sequential steps. Instead of using a color filter array where different colors are mixed at the pixel level, the system uses multiple illuminating modules that emit different colors sequentially, allowing each pixel to receive monochromatic light from different angles at different times. This segmentation of color acquisition enables higher resolution since no color filter blocks light paths.
Solution Approach 2:
The patent employs periodic sequential illumination where different color lights are emitted in repeated cycles. The control module controls the illuminating modules to emit red, green, and blue lights sequentially in a periodic manner, allowing the mono-color image-retrieving module to capture images at different color wavelengths without simultaneous color filter interference. This periodic action enables high-resolution monochromatic images to be synthesized into a complete color image.
2Measurement precision
If different incident angles of different color lights are used, then material reflection characteristics can be captured, but color distinction becomes difficult due to varying reflection rates
Solution Approach 1:
The patent segments the illumination into separate monochromatic light sources at different angles. Each illuminating module emits a specific color at a specific angle, and the control module coordinates these separately. This allows the system to capture reflection characteristics of different materials at different angles without the confusion of simultaneous multi-color illumination, improving color distinction while maintaining material property detection.
Solution Approach 2:
The control module acts as an intermediary that coordinates the illuminating modules and the image-retrieving module. It controls the sequential emission of different colored lights at different angles and synchronizes the image capture process. This intermediary control ensures that color information from different angles is captured in a structured manner, making color distinction easier while still capturing material reflection characteristics.
3Measurement precision
If multiple illuminating modules with different colors and angles are used, then resolution and color saturation are improved, but inspection time increases due to sequential imaging
Solution Approach 1:
The patent uses periodic sequential illumination where multiple colors and angles are cycled through in a repeated pattern. The control module coordinates this periodic emission to capture all necessary color and angle information through multiple sequential images. While this increases inspection time compared to single-shot capture, it achieves superior resolution and color saturation that cannot be obtained with conventional single-color or simultaneous multi-color methods.
Solution Approach 2:
The system performs preliminary sequential capture of monochromatic images at different angles and colors before final processing. The control module coordinates the illuminating modules to emit lights in a predetermined sequence, allowing the image-retrieving module to capture intermediate monochromatic images that can be later synthesized. This preliminary action enables high-resolution color image reconstruction while accepting increased inspection time as a trade-off for quality.
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 solution enhances resolution and color saturation, providing accurate profiles and component widths in images by controlling illuminating angles and colors, resulting in improved inspection accuracy without the limitations of color filters.
Implementation Method 1
Each of the illuminating modules includes a plurality of light-emitting elements of different colors around the optical axis
Implementation Method 2
different incident angles of different color lights may result in different reflection rate due to the different materials and coating on the device
Data Source
AI summary
An inspecting device for inspecting an inspection target is provided. The inspecting device includes a mono-color image-retrieving module, illuminating modules and a control module. The mono-color image-retrieving module is disposed above the inspection target with an optical axis orienting toward the inspection target. Each of the illuminating modules includes light-emitting elements of different colors. The control module controls the illuminating modules to sequentially generate illuminating lights both in an order of different colors and different incident angles to further control the mono-color image-retrieving module to sequentially retrieve mono-color images each in response to one illumination of the illuminating lights. The control module performs an inspection of the inspection target based on the mono-color images.