A lens array for a line head, a line head and an image forming apparatus

摘要

A line head (29), includes: a head substrate (293) that includes a first light emitting element (295) and a second light emitting element (295); and a lens array (299) that includes a first positive lens (LS1) that images a light emitted from the first light emitting element on a specified plane and has a lens surface of a free-form surface, and a second positive lens (LS2) that images a light emitted from the second light emitting element on the specified plane and has a lens surface of a free-form surface, each of the lens surfaces of the first and the second positive lenses having focal points with different focal lengths.