公开(公告)号：US20180299257A1

公开(公告)日：2018-10-18

申请号：US15937119

申请日：2018-03-27

Applicant: MITUTOYO CORPORATION

Inventor： Ryoichi IMAIZUMI ,  Ichirou TANIGUCHI

IPC: G01B11/08 ,  G02B26/12 ,  H05K7/20 ,  H05K5/03

CPC classification number: G01B11/08 ,  G01B5/0014 ,  G01B11/2433 ,  G02B26/12 ,  G02B26/121 ,  G02B26/125 ,  H02K9/22 ,  H05K5/03 ,  H05K7/20436

Abstract: An optical outer diameter measurement apparatus includes a rotary device driven to rotate by a motor to convert light emitted from a light-emitting element into scanning light, a collimator lens configured to convert the scanning light into parallel scanning light that is projected toward an object to be measured, a condenser lens configured to condense the parallel scanning light having passed by the object to be measured, a light-receiving element configured to receive light condensed by the condenser lens, a housing that accommodates the rotary device and the collimator lens, and an optical-path cover including, in the housing, two walls extending in a scanning direction of the scanning light and located opposite each other with the scanning light between the two walls.