| 摘要 |
An adjustment device for controlling the orientation of an optical projection system, in particular motor vehicle headlamp, according to the invention, includes a linkage of the deformable polygon type (4, 9, 12, 13, 5, 14, 11, 10) including a first guide block (4) on which the first ends of two inclinable arms (9, 10) are articulated, a pair of opposite blocks (11, 12) with variable separation, on each of which a second end respectively of one and the other of the two inclinable arms (9, 10) is articulated, a device (16) for separating the said opposite blocks (11, 12), and a second guide block (5) directly or indirectly connected to the said opposite blocks (11, 12), so that the separation or the bringing together of the said opposite blocks (11, 12) under the effect of the separation device (16) causes a variation in the separation between the said first (4) and second (5) guide blocks. <IMAGE>
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