Matrix Illumination Control for Multi-Camera Inspection
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Solution Overview
Problem
Existing image inspection devices face challenges with blind spots and interference between cameras and illumination devices, particularly when using multiple cameras, due to the one-to-one or one-to-many relationships between cameras and illumination sources, which limits optimal illumination settings and increases device size.
Innovation Solution
An image inspection device with a matrix arrangement of independently controllable illumination elements that can be turned on and off to provide optimal illumination for each camera, allowing for arbitrary irradiation angles and patterns, and a control system to manage these elements to ensure each camera captures images under the best illumination conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple cameras are used to image the entire object, then blind spots are eliminated, but the device size increases and interference between illumination sources occurs
Solution Approach 1:
The patent merges multiple illumination devices into a single integrated illumination unit with multiple independently controllable light sources. This allows multiple cameras to share one compact illumination device, providing comprehensive illumination coverage without requiring separate illumination devices for each camera, thus reducing overall device size while eliminating blind spots
Solution Approach 2:
The illumination device is segmented into multiple independently controllable light sources, each assigned to specific camera fields of view. This segmentation allows precise control of illumination regions, enabling multiple cameras to capture complete object information without interference from unrelated illumination sources, thereby improving inspection coverage
2Object-affected harmful factors
If each illumination device is assigned to one camera (one-to-one relationship), then interference between illumination sources is avoided, but optimal illumination settings cannot be achieved for each camera
Solution Approach 1:
The patent implements dynamic control of illumination elements, where each light source can be independently activated or deactivated based on the specific imaging requirements of each camera. This dynamic assignment allows the system to optimize illumination settings for each camera while avoiding interference from unrelated illumination sources, achieving both interference avoidance and illumination optimization
3Illumination intensity
If illumination devices are arranged for each camera, then optimal illumination is provided, but physical interference between illumination devices occurs
Solution Approach 1:
The patent transitions from a one-to-one correspondence between cameras and illumination devices to a many-to-one relationship where multiple cameras share a single multi-element illumination device. This dimensional change in the system architecture allows each camera to receive optimized illumination from specific elements within the shared illumination device, eliminating physical interference while maintaining illumination 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
This configuration enables optimal illumination for multiple cameras, reduces device size, and improves image measurement accuracy by providing a consistent illumination environment for each camera, while also shortening image acquisition time and avoiding interference between illumination sources.
Implementation Method 1
an illumination part that is disposed between the object and the plurality of imaging parts and is configured to radiate light toward the object
Implementation Method 2
The illumination part includes a plurality of illumination elements which are arranged in a matrix and are allowed to be turned on independently
Data Source
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AI summary
An image inspection device (1) which can image an object with a plurality of cameras in a state in which the object (W) is optimally illuminated and which can also be downsized is provided. The image inspection device includes a plurality of imaging parts (10A, 10B, 10C) that image the object, an illumination part (20) disposed between the object and the plurality of imaging parts and radiates light toward the object and has a light-transmissive property, and a control part (100) that controls the plurality of imaging parts and the illumination part. The illumination part includes a plurality of illumination elements (21) which are arranged in a matrix and are allowed to be turned on independently. The control part controls the plurality of illumination elements to cause the illumination part to illuminate a region of the object corresponding to a field of view of the plurality of imaging parts.