JPS5814073B

PURPOSE:To prevent direct light from the rear side to the photo detection element, by providing the light shield layer consisting of the non-light transmissible metal layer and light transmissible insulation layer between the photo detection element and the board, in the optoelecric conversion unit of sensor for facsimile. CONSTITUTION:The light flux 10 emitted from the light source 2 illuminates the original 1 through the gap between the light shield layers 11, transparent insulation layer 12 and transparent protective layer 19, and the reflection light from the original 1 is caught at the photo detection element 8 and in optoelectric conversion. A part 10' of the reflection light from the original 1 directly goes toward the photo detection element 8 and it is interrupted at the light shield layer 11.