Method and device for hyperacute detection of an essentially...

Details Method and device for hyperacute detection of an essentially... Method and device for hyperacute detection of an essentially...

2005-03-16

2010-02-23

Chowdhury, Tarifur R. (Department: 2886)

Optics: measuring and testing

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Reexamination Certificate

active

07667859

ABSTRACT:
Method and device for the detection of an essentially rectilinear contrast edge (E) in a direction, whereby a periodic sweep (Ω) of global visual angle (Δψ) of the optical sensors, by translation (S) in another direction transverse to the first direction, is carried out. The translation provides a periodic sweep of non-uniform angular speed (ψ) during a part of the period of sweeping and a measurement of a time difference (t) from the signals provided by the sensors (D1, D2), depending on the angular position of the contrast edge (E) with relation to a reference direction (OY12) within the global visual angle (Δψ) from the sweep law (Ω), the reference direction being connected to a specific value for the time difference (t). The above is of application to spatial stabilization of a sight line and the fine following and fixing of an object with at least one contrast edge.

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Viollet S et al:, “Super-Accurate Visual Control of an Aerial Minirobot”, Autonomous Minirobots for Research and Edutainment. AMIRE2001. Proceedings of the 5THHeinz Nixdorf Symposiu Heinz Nixdorf Inst., Univ. Paderborn Paderborn, Grmany., Oct. 22, 2001-Oct. 25, 2001, pp. 215-224, XP001152416, ISBN: 3-935433-06-9, the Whole Document.

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