LENS ARRAY, IMAGE READING DEVICE, AND IMAGE FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To suppress stray light.SOLUTION: A first lens array 17 includes first partial arrays 20 and filling parts 21. The first partial arrays 20 each include a plurality of first lens surfaces 22 functioning as lenses. The plurality of first lens surfaces 22 are arranged in the longitudinal direction of a surface s1 on which light is made incident. The plurality of first partial arrays 20 each have the first lens surfaces 22 arranged side by side on a single straight line, and the adjacent first partial arrays 20 form a space between the end faces in the longitudinal direction, which is filled with the filling part 21.