公开(公告)号：US11193757B2

公开(公告)日：2021-12-07

申请号：US16717320

申请日：2019-12-17

Applicant: MITUTOYO CORPORATION

Inventor： Satoru Yoshida ,  Tatsuya Nagahama ,  Masafumi Yamanaka ,  Hitoshi Isobe ,  Naoto Oita ,  Koji Kubo ,  Yuko Shishido ,  Nobuo Ohba ,  Takahisa Ootake ,  Hiroki Matsui ,  Masanori Arai ,  Shiro Igasaki ,  Yuki Kurahashi ,  Hiroshi Sakai ,  Yutaka Watanabe

IPC: G01B11/24 ,  H04N5/225 ,  G02B21/36

Abstract: An image measurement apparatus, which functions as a non-contact profile-measuring device, includes: an image sensor as an image pick-up device; a variable focal length lens (liquid lens unit) disposed on an optical axis extending from a workpiece to the image sensor; and a controller (image-pickup lens controller and image measurement processor) configured to control the variable focal length lens and process a detected image by the image sensor. The image measurement apparatus, which also functions as a non-contact displacement-detecting device, includes: an image sensor; a variable focal length lens (liquid lens unit) disposed on an optical axis extending from the workpiece to the image sensor; and a controller (displacement-detection lens controller and profile measurement processor) configured to control the variable focal length lens and a detected image by the image sensor.