Calculate 6maz as a function of R and D without making any assumption on the value of the angle, small or large, then give a simplified expression for 6maz considering it is small (in which case sin 6maz = tan 6max = Emaz).

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2.2

R
D
D'
Transcribed Image Text:R D D'
2.2 Numerical aperture of the imaging system
The numerical aperture (NA) of an imaging system is related to the range of angles over
vhich it accepts light. If Omaz is the maximum acceptance angle, then NA = n sin 6maz
vhere n is the optical index of the medium in which the light is propagating.
Calculate 6maz as a function of Rand D without making any assumption on the value of
the angle, small or large, then give a simplified expression for 6maz considering it is
small (in vwhich case sin 6mar = tan 6mar Omaz).
Transcribed Image Text:2.2 Numerical aperture of the imaging system The numerical aperture (NA) of an imaging system is related to the range of angles over vhich it accepts light. If Omaz is the maximum acceptance angle, then NA = n sin 6maz vhere n is the optical index of the medium in which the light is propagating. Calculate 6maz as a function of Rand D without making any assumption on the value of the angle, small or large, then give a simplified expression for 6maz considering it is small (in vwhich case sin 6mar = tan 6mar Omaz).
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