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Lecture Outlines
The ray theory of light
Ch. 27:
Corrective optics
Optical Instrumentation
Andrei Galiautdinov (UGA)
2014FALL – PHYS1112
0
1
CORRECTIVE OPTICS
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3
[cm]
4
Correcting the vision of a fully relaxed nearsighted eye:
this is where
the image of
a distant star
is formed
(BAD!)
eye lens
focal point
of a fully
relaxed
myopic eye
retina
5
Correcting the vision of a fully relaxed nearsighted eye:
this is where
the image of
a distant star
is formed now
(GOOD!)
corrective
diverging lens
eye lens
focal point
of a fully
relaxed
myopic eye
retina
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Correcting the vision of a fully relaxed farsighted eye:
eye lens
retina
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Correcting the vision of a fully relaxed farsighted eye:
this is where
the image of
a distant star
is formed
(BAD!)
eye lens
retina
12
Correcting the vision of a fully relaxed farsighted eye:
corrective
lens
eye lens
this is where
the image of
a distant star
is formed now
(GOOD!)
retina
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Normal eye uses a magnifying glass
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Normal eye uses magnifying glass:
retina
small angle approx.
eye lens
magnifier
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“Camera” + Magnifier = Telescope
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retina
distant
galaxy
eyepiece in the
regime of magnifier
objective lens in the
regime of camera
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“Projector” + Magnifier = Microscope
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(do)obj
ameba
objective lens
in the regime
of projector
Strictly speaking, instead of fobj we should
have used (do)obj. But because in practice
“the ameba” is placed very close to 𝐹𝐹obj,
many use (do)obj ≈ fobj. On the test I’ll tell
you which one to use.
eyepiece lens in the
regime of magnifier
24
This is an old slide…
Strictly speaking, instead
of fobj we should have
used (do)obj
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The End
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