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Test Optical System
Aberration by Shadow Edge Method and
Edge Tester Principle |
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◆ Knowledge
Introduction |
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Shadow edge method can
sensitively determine
the degree of goodion
converging spherical
wavefront. Geometric
aberrations of the
objective makes the
light in different
regions images into
different positions. The
knife edge cuts the
imaging beam near the
image surface, you can
see the shadow image
with a specific shape;
On the other hand, the
geometric aberrations of
the objective lens
corresponds to a certain
wave aberration at the
exit pupil, and thus the
knife edge equation and
its shadow map can be
obtained. Conversely,
the typical geometric
aberrations can be
tested according to
shadow map. The shadow
edge requires simple
equipment, the detection
method is intuitionistic
with practical value. |
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Main
points:
Test different spherical aberration
pattern shape in field by shadow
edge method
Measure the axial ball by shadow
edge method |
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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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Observe the position
chromatic aberration
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Test spherical aberration
correction effect of optical
system |
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