Polarized lighting can reduce unwanted glare when the illumination and camera path are set up to separate specular reflection from the feature of interest. It is a test method, not a universal fix: material, coating, curvature, camera angle, wavelength, and defect mechanism still determine whether contrast improves.
Use product, process, facility, and inspection images to check whether the page claim is tied to a visible engineering condition.
Selection follows the observable condition, the optical setup, and the production constraint.
Test it when direct reflections move across the image or hide marks, scratches, print, coating response, or other features.
Polarizer orientation on the light and analyzer orientation on the camera path.
Reducing useful feature signal along with glare.
No. It can reduce specific reflection behavior, but curved geometry, texture, coatings, part pose, and the target feature can make another method more effective.
Keep the camera, lens, part position, exposure, and lighting geometry stable, then compare glare and defect contrast with the polarizer and analyzer arrangement changed in a controlled way.
