Airborne infrared fire detection optical system with tilted porthole

Thermal infrared imagery techniques have been applied in the field of wild land fire management for many years. A kind of infrared system with a tilted porthole conformal to the ellipsoid prow underside the plane nose is presented. This design increases the range of the inner imaging system, reduces...

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Bibliographic Details
Published in:Optics communications 2012-03, Vol.285 (6), p.937-940
Main Authors: Chang, Jun, Song, Dalin, Wang, Ruirui, Zhang, Bangshuai, Li, Jiang
Format: Article
Language:English
Subjects:
Aberration
Aberration correction
Design engineering
Ellipsoids
Fire detection
Fires
Geometric optical design
Infrared
Infrared imagery
Lens system design
Nose
Tilted porthole
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Summary:Thermal infrared imagery techniques have been applied in the field of wild land fire management for many years. A kind of infrared system with a tilted porthole conformal to the ellipsoid prow underside the plane nose is presented. This design increases the range of the inner imaging system, reduces air drag and protects against damage. The paper analyzes the aberration characteristic of a tilted ellipsoid porthole, and brings forward an effective corrective solution to make the system achieve a − 30° to − 90° field of regard with an instantaneous ± 4° field of view. The ultimate performance indicates that the infrared optical system has met the detection requirements.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2011.11.013