Photosensor for detecting the position of incident light in two dimensions using a pair of film resistors and a photoconductive element sandwiched therebetween

A photosensor for detecting the position of incident light in two dimensions and the photoelectric current, comprising:

• a transparent member made of glass substrate and having parallel first and second surfaces;
• X-axis light position detection element for detecting a X-axis position of light illuminated thereon;
• Y-axis light position detection element for detecting a Y-axis position of light illuminated thereon;
• a plurality of photoelectric current detection elements for detecting a photoelectric current due to a photoelectromotive force generated on a portion thereof illuminated with said light according to an intensity of said light, said X-axis light position detection element, said Y-axis light position detection element and said plurality of photoelectric current detection elements being disposed on said first surface of said transparent member;
• a light screening film mounted on said second surface of said transparent member and having a cross-shaped transmission hole through which light illuminated thereon passes.