Sensor alignment

Sensor alignment

For linear illumination sources, rotating the line sensor results in asymmetric vignetting. 
The camera and illumination optics can be aligned optimally monitoring the object illumination using the oscilloscope display.

non-ideal sensor alignment

Sensor and illumination optics are not aligned collinearly. The vignetting is asymmetric.

Good sensor alignment

Sensor and illumination optics aligned properly. The vignetting is symmetrical.