Q.

How much accuracy can be achieved by photodiode array imaging?

A. ±0.05 μm
B. ±0.15 μm
C. ±0.5 μm
D. ±0.25 μm
Answer» A. ±0.05 μm
Explanation: in photodiode array imaging method which is a laser inspection technique in which the stationary part’s shadow is projected on a solid-state diode array image sensor. for large parts, 2 arrays are used i.e. one array for each edge. accuracies as high as ±0.05 μm can be achieved by this method.
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