Patent ID: 6437335
Filing Date: 2002-08-20
Classification: H04N

Abstract:
A method for detecting an optical image, which comprises the steps of:during a first time phase: moving a scan head relative to an object such that a first optical signal from a first area of the object falls onto a first optical sensor array mounted on the scan head and a second optical signal from a second area of the object falls onto a second optical sensor array mounted on the scan head; and transferring a first image data signal from the first optical sensor array to a detection circuit, wherein the first image data signal results from exposure of the first optical sensor array by first optical signal during time phase immediately prior to the first time phase and simultaneously exposing the second optical sensor array to the second optical signal; during a second time phase: moving the scan head relative to the object, such that new first optical signal from new first area of the object falls onto the first optical sensor array and new second optical signal from new second area of the object falls onto the second optical sensor array; and transferring a second image data signal from the second optical sensor array to the detection circuit, wherein the second image data signal results from exposure of the second optical sensor array by second optical signal during the first time phase and simultaneously exposing the first optical sensor array to first optical signal, wherein first optical signal is from the new first area; and forming a composite image data signal from the first and second image data signals by the detection circuit.