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What type of fibre is present in the optical tube of mini borescope?

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in Engineering Metrology by (829k points)
What type of fibre is present in the optical tube of mini borescope?

(a) Quartz fibre

(b) Asbestos fibre

(c) Plastic fibre

(d) Resin fibre

The question was asked in a national level competition.

My question is taken from Visual Inspection in section Machine Vision Systems of Engineering Metrology

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The correct option is (a) Quartz fibre

For explanation I would say: Mini borescope uses a single image-relaying rod or quartz fibre in the optical tube in place of conventional relay lenses. Mini borescope is a variant of borescope along with hybrid borescopes, extendable borescopes, or rigid chamberscope.

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