公开(公告)号：US20170205748A1

公开(公告)日：2017-07-20

申请号：US15384543

申请日：2016-12-20

Applicant: OMRON CORPORATION

Inventor： Hajime KAWAI ,  Junichi MAEKAWA ,  Masato UEDA

IPC: G03G15/00

CPC classification number: G03G15/556 ,  G01J1/0214 ,  G03G15/5054 ,  G03G15/5058 ,  G03G2215/00059 ,  G03G2215/0148

Abstract: A toner density sensor includes: a light emitting element configured to radiate light; a light receiving element configured to receive the light emitted from the light emitting element and reflected from a detection object; a substrate whereon the light emitting element and the light receiving element are surface mounted; a case covering the light emitting element and the light receiving element; an optical path configured parallel to the substrate for light generated from the light emitting element; a groove provided in the substrate from the end part of the substrate in the direction light travels from the light emitting element to between the light emitting element and the light receiving element, the groove recessed from the mounting surface in the thickness direction of the substrate; and an insert provided to the case and configured for insertion into the groove.