Method of manufacturing lens array plate, erecting equal-magnification lens array plate, and optical scanning unit, and image reading device

摘要

A method of manufacturing a lens array plate includes: forming a light shielding film on a flat surface of a dielectric substrate; forming a plurality of convex lenses on the flat surface of the dielectric substrate by press molding the dielectric substrate with the light shielding film; and forming a stack of two lens array plates manufactured by press molding. The light shielding film is not formed in a lens formation area in which the convex lens is formed.

主权项

1. A method of manufacturing a lens array plate comprising:
preparing a dielectric substrate having parallel flat surfaces; forming a light shielding film on a flat surface of a substrate; and forming a plurality of lenses in the substrate by press molding the flat surface of the substrate with the light shielding film, the plurality of lenses being recessed in the substrate, wherein the light shielding film is not formed in a lens formation area in which a lens is formed, wherein the forming of lenses by press molding comprises: press molding an area formed around the lens formation area and formed with the light shielding film, thereby forming a recess having a substantially columnar profile that extends from the surface of the substrate toward the interior thereof, the substantially columnar profile being comprised of an interior sidewall surface and a bottom interior surface, wherein the sidewall surface of the recess is provided with the light shielding film bent and extended by the press molding; and forming the lens on the bottom interior surface of the recess by press molding the lens formation area of the substrate.