Question

Which of the following is not true about metrology lasers used in laser inspection?

(a) These are high-power instruments

(b) Used for rapid non-contact gauging of delicate parts

(c) Have low optical cross-talk

(d) Wide dynamic range

I got this question in an interview for job.

My question is taken from Laser Inspection in portion Machine Vision Systems of Engineering Metrology

Answer 1

Correct option is (a) These are high-power instruments

Explanation: These are low-power instruments. Laser systems have wide dynamic range, high contrast and low optical cross-talk. Laser systems can be used in inspection of surfaces and in dimensional measurements and are very useful in precision and accuracy measurements.