Circuit board for optical element

摘要

The invention provides a circuit board for an optical element which is disposed in an optical reading apparatus or an optical writing apparatus and is used to irradiate document reading light upon an document or irradiate image writing light upon a photosensitive material through a lighting window thereof. The circuit board for an optical element comprises a transparent layer in the form of a film, one or a plurality of metal electrodes formed in a layered condition at a portion of a first principal surface of the transparent layer positioned on the light incidence side along the lighting window which is defined so as to extend perpendicularly to the moving direction of the document or the photosensitive material in order to transmit the light there through, and a conductive charge preventing layer a light intercepting property and formed at a portion of a second principal surface of the transparent layer, which is the opposite surface to the first principal surface of the transparent layer and is opposed to the original or the photosensitive material so as to define the lighting window. An optical reading element or a image writing optical element is mounted on the metal electrode or any of the metal electrodes.