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A missile seeker. The inventive missile seeker includes a dome within which a novel optical arrangement is retained. The optical arrangement includes a first prism mounted for rotation about an optical axis and a second prism mounted for rotation about the optical axis. In the illustrative embodimen

A missile seeker. The inventive missile seeker includes a dome within which a novel optical arrangement is retained. The optical arrangement includes a first prism mounted for rotation about an optical axis and a second prism mounted for rotation about the optical axis. In the illustrative embodiment, the first and second prisms are Risley prisms. In addition, the illustrative implementation includes a first motor arrangement for rotating the first prism about the optical axis and a second motor arrangement for rotating the second prism about the optical axis. A controller is provided for activating the first and second motors to steer the beam at an angle .phi. and nod the beam at an angle .theta.. In a specific implementation, the first prism and/or the second prism have at least two surfaces contoured to correct for optical aberration. A teaching is provided to contour the surfaces to correct for astigmatism, coma, trefoil and other non-rotationally symettric abberation. The contour may be effected by laser etching, micro-machining optical thin-film coating or other such technique.

대표청구항 ▼

1. A missile seeker including:an aerodynamically-conformed dome secured to a missile; and a steerable optical arrangement disposed within said dome, the optical arrangement comprising: a first prism mounted for rotation about an optical axis and a second prism mounted for rotation about said optical

1. A missile seeker including:an aerodynamically-conformed dome secured to a missile; and a steerable optical arrangement disposed within said dome, the optical arrangement comprising: a first prism mounted for rotation about an optical axis and a second prism mounted for rotation about said optical axis, said first prism having at least one surface and said second prism having at least one surface, and at least one of said surfaces being contoured to correct for optical aberration attributable at least in part to said dome.