Abstract
Airborne infrared techniques have been used in wild land fire management for
decades. This paper describes a kind of infrared scanning system based on a rotating
drum with a tilted porthole underside the plane nose. This design increases the
stability of the mechanism system, reduces air resistance and protects inner parts.
Aberration characteristics of a tilted ellipsoid porthole are analyzed and an
effective solution is invented which makes the system achieve
30° field of regard. The system's ultimate value
of modulation transfer function is near the diffraction limit, which indicates that
the performance of the rotating optical system meets the imaging
requirements.
© 2011 Optical Society of Korea
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