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The laser output is coupled into the fibre using a converging lens.

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in Biomedical Instrumentation by (76.6k points)
The laser output is coupled into the fibre using a converging lens.

(a) True

(b) False

This question was posed to me in an internship interview.

I need to ask this question from PACS (Picture Archiving and Communication System) in portion Telemedicine Technology of Biomedical Instrumentation

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Right choice is (a) True

To elaborate: True, The He–Ne laser operating at 632.8 nm wavelength is used. The laser output is coupled into the fibre using a converging lens, which results in an increased power density at the skin surface and thus enables the detection of flow in the more deeply seated veins and arteries.

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