Two-Axis Phase Shift Lighting (LDF-DX Series)
LED lighting that enables high-speed switching between vertical and horizontal stripe patterns, making it effective for observing shallow dents and sink marks that are difficult to visualize.
Features
- LED lighting that uses a dedicated lighting controller to enable high-speed switching among four vertical and four horizontal stripe patterns
- Images can be captured with the surface pattern of the workpiece suppressed and only uneven areas emphasized, making the lighting effective for observing shallow dents and sink marks that are difficult to visualize
- Designed to accommodate up to eight 119 × 122 mm light-emitting panels, the system supports imaging configurations such as coaxial and transmissive illumination to suit specific applications
- Suitable for applications such as inspecting dents and scratches on glossy metal and molded plastic parts, as well as sink marks and streaks on transparent molded plastic parts and glass products
LDF-DX Series
We can customize the size and shape of the light-emitting surface, as well as the width and number of stripe patterns, and we can also manufacture custom coaxial models. Please contact us for more details.
Imaging and Image Processing Mechanism (Example)
(1) Capture images while switching among eight vertical and horizontal stripe patterns
(line scan camera)
(2) Reconstruct the eight images (four vertical and four horizontal stripe patterns) to detect distortions in the stripe patterns
(3) Process the stripe images to obtain information on surface unevenness
Imaging Examples
Visual Inspection of Painted Molded Parts
Painted Molded Parts
Pattern Imaging with a Specular Reflection Configuration
Suppress the painted surface pattern and highlight only the uneven areas
Package Interlock Inspection
Packaging Materials
Pattern Imaging with a Specular Reflection Configuration
Suppress the printed pattern and emphasize the seal
Visual Inspection of Lenses
Convex Lens
Pattern Imaging with a Transmissive Configuration
Emphasizes fine lines and scratches on the surface
Visual Inspection of Transparent Plastic Cases
Plastic
Pattern Imaging with a Transmissive Configuration
Visualization of Molding Defects
Example System Configuration
Example with line scan camera
Light Refraction Visualization System Evaluation Kit Refview
- Evaluation kit effective for observing faint dents and sink marks that are difficult to visualize
- By displaying a stripe pattern on the light source, projecting it onto the target object, capturing images while shifting the phase, and processing the images, the system can visualize subtle light refraction and differences in reflection angles.
Area Camera Example
