Example of Imaging Plastic Laser Characters
In this example, plastic laser characters are imaged for analysis.
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Lighting Setup: a. Ring Light Source: The use of a ring light source is employed. b. Coaxial Light Source: Similarly, a coaxial light source is utilized.
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Analysis: a. Ring Light Source Analysis: With the ring light source, the contrast between characters and the background is insufficient. b. Coaxial Light Source Analysis: Conversely, the coaxial light source provides a clearer differentiation between the characters and the background, aiding in detection.
Industry Overview
The application of machine vision in the semiconductor industry has become increasingly common, with its scope expanding to encompass the detection and measurement of various aspects such as semiconductor appearance defects, dimensions, quantities, flatness, spacing, positioning, calibration, solder joint quality, and curvature.
Detection content includes:
- Inspection of electronic component appearance
- Inspection of SMD (Surface Mount Device) products
- Inspection of silicon wafer appearance
- Inspection of IC (Integrated Circuit) chips
- Inspection of flatness in electronic connectors
Challenges in illumination:
The diversity of product forms, high precision detection requirements, and the fact that product characteristics are not always obvious due to materials and manufacturing processes, result in high demands for illumination.