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Observe Optical System Monochromatic
Aberration by Star-point Method
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◆ Knowledge
Introduction |
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According to the
viewpoint of geometrical
optics, the ideal
condition of optical
system is that point
object changes into dot
image, it means
the light energy emitted
from the object space
can also focus on one
point in image space,
but in reality it is
impossible because of
the presence of
aberrations. Image
quality evaluation
of an optical system is
based on the light
energy distribution in
image space which is
emitted from a point of
object space. In the
conventional image
evaluation, people have
proposed many methods of
image quality
evaluations, resolution
method, star-point
method and shadow method
(knife-edge method) are
widely used. |
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Main
points:
Experiment of testing spherical
aberration produced in different
locations
Experiment of testing coma
aberration produced in different
locations
Experiment of testing astigmatism
produced in different locations
Experiment of testing curvature of
field produced in different
locations |
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Coma
aberration schematic |
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◆ Related
Courses |
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Optics, Engineering Optics, Optical
Systems, Photoelectric Detection
Technology |
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◆ Expanding Experiments |
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◆ Applications of Instrument |
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Detect image defects of
system with star-point
method
Test spherical aberration of
lens
with star-point method
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Evaluate the image quality
of optical system
with star-point
method
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