1. A method of forming a segmented curved sensor comprising: forming an array of pixels, each pixel including both detectors and interconnect lines, over a planar surface of a flexible substrate in a pattern, a perimeter of the pattern shaped to form in a two-dimensional plane at least a portion of a three dimensional curved sensor; using a first force to flex the flexible substrate out of the two dimensional plane such that the sensor curves to form at least a portion of the three-dimensional curved sensor.