Patent ID: 6357695
Filing Date: 2002-03-19
Classification: F41G,G01S

Abstract:
A reticle for a guidance seeker, comprising:a) a substrate having a center of rotation; and b) an alternating pattern of light modulating structures disposed on said substrate along a 360 degree path about said center of rotation such that when an image of a target formed on said substrate moves along said path said image generates a plurality of pulses corresponding to a number of said structures crossed by said image, a number of said plurality of pulses changing as said image moves outward radially from said center of rotation; wherein said plurality of pulses form guidance control signals including a unique, unambiguous and singly periodic signal for each rotation of said substrate to provide an instantaneous target location in polar coordinates centered about said center of rotation, and wherein said polar coordinates are indicative of a line of sight angle between said center of rotation and a target line of sight for determining course correction and include a polar angle component in reference to said center of rotation and said image for determining timing and direction for applying a vector force along a line through said image and said center of rotation such that said line of sight angle is reduced.