| 摘要 |
An imaging system and method are provided to detect optical aberrations, such as for a scanning-array imaging system. The imaging system includes an optical system for capturing an image of an object and for focusing the image on a surface generally perpendicular to an optical axis. The imaging system also includes first and second focal plane arrays. The second focal plane array is proximate the first focal plane array, but is optically displaced from the first focal plane array by a predetermined optical path distance along the optical axis and in the in-track direction. The second focal plane array receives a defocused image having a predefined difference in focus relative to the image received by the first focal plane array, and displaced in time from the image received by the first focal plane. By analyzing the images obtained by the focal plane arrays, the imaging system detects optical aberrations.
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