公开(公告)号：US10895756B2

公开(公告)日：2021-01-19

申请号：US16912676

申请日：2020-06-25

Applicant: FUJIFILM Corporation

Inventor： Kohei Awazu ,  Yasuhiro Miwa

IPC: G02B27/64 ,  H04N5/232 ,  G02B7/182

Abstract: Data sets DS4 to DS6 each consisting of plural linear functions obtained by approximating an output characteristic of a Y-axis rotation position detection Hall element H2 and a data set DS2 consisting of plural linear functions obtained by approximating an output characteristic of an and the X-axis position detection Hall element H1 are stored for each of plural positions in a direction X in a ROM of a memory. A system controller detects a position of a movable member in the direction X based on the data set DS2 and an output signal of the X-axis position detection Hall element H1, then selects the data set corresponding to the position among the data sets DS4 to DS6, and detects a position of the movable member in a direction Y based on the selected data set and an output signal of the Y-axis rotation position detection Hall element H2.