Multi-Waveband Illumination Path for Flexible AOI Detection
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Solution Overview
Problem
Existing automated optical inspection (AOI) systems face limitations due to the narrow wavelength ranges of light sources like LEDs and laser sources, which hinder effective detection of manufacturing defects requiring a wide optical waveband.
Innovation Solution
An illumination system incorporating multiple light sources emitting different wavebands, controlled by a light source controller, and an optical path adjustment module to combine these lights into a wider waveband for inspection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LED or laser light sources are used, then durability and stability are improved, but wavelength range becomes narrow
Solution Approach 1:
The patent combines multiple LED or laser light sources with different wavelength ranges into a single illumination system. Each light source maintains its individual durability and stability characteristics while the combination provides a broad overall wavelength range covering ultraviolet, visible, and infrared regions, thus resolving the contradiction between reliability and adaptability.
Solution Approach 2:
The illumination system is designed to perform multiple inspection functions across different wavelength bands using a unified platform. The system can detect various types of manufacturing defects (organic contaminants, inorganic contaminants, particle defects) by utilizing the combined output of multiple light sources, making the system universally applicable for comprehensive AOI tasks.
2Measurement precision
If a wide waveband is required for AOI, then detection capability is improved, but device complexity increases
Solution Approach 1:
Multiple light sources are merged into a single illumination system with a unified optical path. The controller integrates the operation of individual light sources, and the optical system combines their outputs, thereby achieving broad wavelength coverage without proportionally increasing overall system complexity.
Solution Approach 2:
The illumination system is designed as a multi-functional platform that can perform various detection tasks across different wavelength bands. By consolidating multiple light sources and their control into a single integrated system, the patent achieves comprehensive detection capability while managing system complexity through unified design.
Data Source
AI summary
The present application discloses an illumination system and an illumination method. The illumination system includes a first light source, a second light source, a light source controller and an optical path adjustment module. The first light source is configured to emit a first light at least corresponding to a first waveband, and the second light source is configured to emit a second light at least corresponding to a second waveband, wherein the first waveband is different form the second waveband. The light source controller is coupled to the first light source and the second light source, and is configured to control the first light source and the second light source individually. The optical path adjustment module is configured to guide at least one of the first light and the second light to an output optical path.