Question

Which of the following option is true about hybrid borescopes?

(a) Use rod lenses combined with concave lenses

(b) Use rod lenses combined with concave mirror

(c) Use rod lenses combined with convex lenses

(d) Use rod lenses combined with convex mirror

The question was posed to me in semester exam.

My enquiry is from Visual Inspection in chapter Machine Vision Systems of Engineering Metrology

Answer 1

The correct option is (c) Use rod lenses combined with convex lenses

The explanation: Hybrid borescopes uses rod lenses combined with convex lenses to-relay the image. Extendable borescope enable the use of extension tubes. These both are the variants of the borescope and used for visual inspection.