Lens unit, exposure head, image forming apparatus, read head and reader

摘要

Problem to be solved: to increase the contrast of image formation and improve printing quality.LED head 16A substrate 69 in which a plurality of LED elements 68 are disposed in the longitudinal directionExtends in the longitudinal direction.A lens unit 54 for converging light emitted from a plurality of LED elements 68 is provided.Lens unit 54A plurality of microlenses 62A are arranged in the longitudinal directionA first lens array 60A to which light is incident from LED element 68 andA plurality of microlenses 62b are arranged in the longitudinal directionA second lens array 60b disposed in such a way that the optical axis coincides with the first lens arrayA plurality of light blocking member apertures 56a are formed.A light blocking member 56 disposed between the LED element 68 and the first lens arrayA viewing angle control member disposed between the first lens array and the second lens array is provided.Diagram