Patent ID: 6608680
Filing Date: 2003-08-19
Classification: G01J,G01N

Abstract:
A method for detecting one or more characteristics of an object with a time delay integration (TDI) detector wherein there is a relative movement between an image of the object and the TDI detector, comprising the steps of:(a) directing light from the object onto the TDI detector to form an image of the object onto the TDI detector, said TDI detector producing an output signal corresponding to the image, said output signal propagating over the TDI detector with a velocity; (b) operating in an asynchronous mode in which a difference in a velocity of the image of the object on the TDI detector and the velocity of the output signal propagating over the TDI detector exists, for at least part of a time during which the output signal is propagating over the TDI detector; and (c) evaluating the output signal of the TDI detector to determine at least one characteristic of the object.