| 摘要 |
A combiner assembly 20 has an optical combiner 21 mounted to a housing 22 which is further arranged for mounting to a roof structure of a flight deck of an aircraft. The combiner 21 is mounted within a frame 23 which is mounted to the housing 22. The frame 23 has first pivot point 24 which is attached to a first arm 25 which is als o attached to the housing 22 at a second pivot point 26 located at a position remote from the first pivot point 24. First arm 25 is arranged to allow the combiner 21 to rotate around the housing 22 between a deployed position and a stowed position. A second arm 27 is pivotally connected to the frame 22 at a third pivot point 28, at a position spaced from the fir st pivot point 24, and to the housing 22 at a fourth pivot point 29, located at a position remo te from the third pivot point 28 and at a position spaced from the second pivot point 26. The pivot points 24, 26, 28 and 29 are arranged such that the first and second arm 25, 27 are positioned in a non-parallel arrangement and traverse a pathway wherein the mean distance between the combiner 21 and housing 22 varies during rotational movement of the combiner 21 with respect to the housing 22.
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