Abstract
While aerial camera took pictures by way of many airlines and its 45° scanning mirror rotates and scans terrestrial object, the reflected image of the object rotates around the optical axis. It is necessary to eliminate the image rotation so as to maintain its image quality. Based on the cause of the image rotation, the image rotation characteristic of the scanning mirror was analyzed. And through the exploration of the techniques for eliminating the image rotation, one method in which the mirror and its detector rotate synchronously was suggested. The scanning device could image in continuous scanning way and need not remain stationary as step scanning imaging devices. Moreover, this method could solve the problem of large inertia and low scanning efficiency of conventional step scanning devices. It had been applied and evidenced in practical engineering. Test results show that the rotation synchronous error is less than one-third of pixel size and that good images can be acquired without any blurring.
Original language | English |
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Pages (from-to) | 493-496 |
Number of pages | 4 |
Journal | Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering |
Volume | 37 |
Issue number | 3 |
State | Published - Jun 2008 |
Scopus Subject Areas
- Atomic and Molecular Physics, and Optics
- Aerospace Engineering
- Space and Planetary Science
- Electrical and Electronic Engineering
Keywords
- 45° scanning mirror
- Aerial camera
- Image rotation
- Scanning imaging