Patent ID: 6313951
Filing Date: 2001-11-06
Classification: F41G,G02B

Abstract:
An optical system, comprising:a window having a curved outer surface and a curved inner surface;an optical corrector adjacent to the curved inner surface of the window and having an optical corrector shape responsive to a shape of the window, the optical corrector having an inner surface and an outer surface, at least one of the inner surface and the outer surface of the optical corrector having a shape described by ##EQU4##where z is a coordinate oriented perpendicular to a reference plane, c is a constant vertex curvature, r.sup.2 =x.sup.2 +y.sup.2, x and y are Cartesian coordinates lying in the reference plane, k is a conic constant, C.sub.j+1 is a constant coefficient for Z.sub.j, and Z.sub.j is the jth Zernike polynomial term;an optical train positioned such that the optical corrector lies between the curved window and the optical train, the optical train including at least one optical element operable to alter an optical ray incident thereon;a movable optical train support upon which the optical train is mounted; anda sensor disposed to receive the optical ray passing sequentially through the window, the optical corrector, and the optical train.