Optical Resolution Limit

Physical-Chemical Mechanism of Action

The optical resolution limit is the smallest possible distance between two objects that can still be perceived as distinct by the human eye or an optical instrument. It depends on the wavelength of light and the size of the aperture.

Metallurgical Relevance & Risks in Welding

When inspecting weld quality, the optical resolution limit is crucial. Details that are too small cannot be sharply resolved, leading to misjudgments and potentially overlooked defects.

Shop Practice & Action Guidelines

Use optical instruments with a large aperture (high numerical aperture) for better resolution. Make sure lighting is adequate and the object is not too far from or too close to the instrument.