Surface Defect Inspection - OPT Multichannel Light Source

Surface detection background:

1. The user's surface requirements for the product are getting higher and higher;

2. Increasingly stringent industry standards; pharmaceutical industry, packaging industry, agriculture, industry,

3. The level of automation in the manufacturing industry has improved. Many industries are facing reforms in the entire process flow, which has brought great opportunities for surface inspection.

The basic principle of the surface detection system:

The surface detection system consists of an image sensor, an imaging system, a lighting system, an image acquisition system, and an image processing system.

Key technology of surface inspection system:

1. Light source lighting technology: feature extraction, stability, uniformity, color temperature, spectrum

2, photoelectric conversion: CCD, CMOS, signal to noise ratio, pixel size, line array, area array

3, image data transmission: CamLink, USB, Ethernet, 1394

4, multi-channel data acquisition and synchronization control

5, image correction technology: flat field correction, dark field correction, color correction, distortion correction, multiple camera consistency correction

6. Image Processing Algorithms: Positioning, Blob Analysis, Dynamic Masking

The status of surface inspection systems

Surface defect detection has always been a difficult area in the industry. Imaging of the previous image has become a bottleneck in the industry development! In surface defects, scratches generally have a certain degree of directionality. In the past, high and low angles were used to polish the light. However, this kind of lighting method has relatively good results for defects with relatively clear surfaces or relatively deep scratches. Relatively weak defects, the effect is difficult to manifest, often using visual or simply not detect!

OPT's solution for surface inspection

Analyzing the directionality of the scratches will reveal that when the light source parallel to the scratching direction shines over, the scratching effect is relatively weak; when the light source perpendicular to the scratching direction shines over, the scratch effect is relatively obvious! Based on this feature, OPT has developed a multi-channel light source that photographs the product multiple times and performs multiple inspections to achieve the final inspection result.

Multi-channel light source: multi-area, multi-angle, multi-directional, separate lighting, matching OPT multi-channel controller to achieve multiple triggered photographs to ensure that the workpiece is not flawed!

OPT multichannel light source is suitable for the field:

Metal surface detection;

Plastic surface inspection;

Surface detection accuracy requires a relatively high product.

E-mail subject: OPT shares a wonderful case study with you

Multi-channel light source: multi-area, multi-angle, multi-directional, separate lighting, matching OPT multi-channel controller to achieve multiple triggered photographs to ensure that the workpiece is not flawed!

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