Fibre optics and endoscopy (AQA A-Level Physics): Flashcards
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Practise the cards
10 cards from this deck
What are optical fibres made of?
What are optical fibres made of?
Thin, flexible plastic or glass tubes
Principle optical fibres use
Principle optical fibres use
Total internal reflection (TIR)
When does TIR occur?
When does TIR occur?
Light hits boundary at angle critical angle
Refractive index condition for TIR
Refractive index condition for TIR
Core refractive index cladding
Cladding purpose
Cladding purpose
Protects core, reduces signal loss, prevents light escape
Coherent bundle feature
Coherent bundle feature
Fibre positions constant along length
Incoherent bundle use
Incoherent bundle use
Illumination in hard-to-reach areas
Resolution factors in fibre bundles
Resolution factors in fibre bundles
Fibre diameter & packing density
Endoscope coherent bundle role
Endoscope coherent bundle role
Captures & transmits images from inside body
Key-hole surgery advantage
Key-hole surgery advantage
Minimally invasive, reduces recovery & infection