Even for high-gloss curved surfaces such as a solder fillet, a color highlight 3D shape reconstruction enables the 3D shape reconstruction within the range of constant inclination angle; therefore the reconstruction range by software calculation is small.
Fringe lighting system (Oblique light irradiation)
Since the light irradiated by the fringe lighting system has a limited spreading angle, the capturable range of a curved fillet is limited. It is necessary to make the light form an image to focus the stripe on the work face. (This is like the spotlight.) Therefore, the light is reflected in a narrow range, so this system is not suitable for the measurement of mirror and curved faces such as fillets.