Patent ID: 6498339
Filing Date: 2002-12-24
Classification: H01L,H04N

Abstract:
A displacement diagnosing method applied to an image read-out apparatus having a light source for illuminating a document, an optical element for allowing light which is reflected on the document to be received and detecting a corresponding image signal and a plurality of optical members for guiding the reflected light from the document to the optical element, the method comprising the steps of:directing light from the light source to a mark provided on a body of the image read-out apparatus in a position adjacent to the document; guiding the corresponding reflected light to the optical element through the optical members to allow an image signal relating to the mark to be detected by the optical element; making diagnosis, based on the detected image signal, for displacements of constituent elements of the read-out apparatus including the light source, optical members and optical element; and displaying a result of diagnosis.