| US 7,468,740 B2 | ||
| Method and apparatus for scanning the camera LOS in a continuous zoom camera system | ||
| Kee-Tae Han, Daejeon (Korea, Republic of) | ||
| Assigned to Agency for Defense Development, (Korea, Republic of) | ||
| Appl. No. 10/519,351 PCT Filed Jun. 27, 2003, PCT No. PCT/KR03/01263 § 371(c)(1), (2), (4) Date Dec. 27, 2004, PCT Pub. No. WO2004/003662, PCT Pub. Date Jan. 08, 2004. |
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| Claims priority of application No. 10-2002-0036465 (KR), filed on Jun. 27, 2002. | ||
| Prior Publication US 2005/0231614 A1, Oct. 20, 2005 | ||
| Int. Cl. H04N 7/18 (2006.01) | ||
| U.S. Cl. 348—144 [348/143] | 10 Claims |
| 1. A method for the FOV dependent LOS scanning in a turret aided continuous zoom camera with the constant f-number (f/D) where
one can change the field of view (FOV) continuously, wherein
the scan width is dependent on the FOV via the relation below:
Ws=±(m×FOV)
wherein Ws is the scan width and m is the observation width constant,
the mean rate of LOS scanning for half period is determined as a function of the FOV via the following relation:
 wherein Ωs and te are respectively the scan rate and the eye integration time, the C0 and C1 are proportional constants;
whereby on the basis of the two equations above the FOV dependent LOS scan mechanism is expressed as follows:
 wherein ΘSCAZ and ΘSCEL are respectively the azimuth and elevation angles of LOS vector, The AZLOS and ELLOS are the initial reference position of LOS in the azimuth and elevation angles, and, the n(te) is expressed as C′/te with constant C′.
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