公开(公告)号：US20220146639A1

公开(公告)日：2022-05-12

申请号：US17439399

申请日：2019-03-28

Applicant: Mitsubishi Electric Corporation

Inventor： Natsuki HONDA ,  Masayuki OMAKI ,  Yoko INOUE ,  Tomo KISHIGAMI ,  Shota NAKAHARA ,  Yoshitaka TSUBOI ,  Yosuke TAKAGAWA

IPC: G01S7/481 ,  G01S17/931

Abstract: A distance measuring apparatus to measure a distance to an object includes: a plurality of light sources to emit a first light and a second light; a mirror; and a light receiving unit. When the mirror rotates about the first and third axes, an angle formed by an optical axis of the second light projected on the first plane and the second axis is larger than an angle formed by an optical axis of the first light projected on the first plane and the second axis, and an angle formed by the optical axis of the second light projected on the second plane and the second axis is larger than an angle formed by the optical axis of the first light projected on the second plane and the second axis.

公开(公告)号：US20200033452A1

公开(公告)日：2020-01-30

申请号：US16445358

申请日：2019-06-19

Applicant: Mitsubishi Electric Corporation

Inventor： Yosuke TAKAGAWA ,  Masahiro KAWAI

IPC: G01S7/481 ,  G02B26/10 ,  G01S17/10 ,  G01S7/484 ,  G02B26/08

Abstract: A distance measurement apparatus includes: a laser light source configured to emit emitted light to be applied to an object to be measured; a laser light source control circuit configured to control the laser light source; a MEMS mirror configured to two-dimensionally scan the object with the emitted light; a reflecting member configured to cover a part of a scan region, and reflect the emitted light; and a light detector configured to receive reflected light from the object to be measured and reflected light from the reflecting member, and output a received light signal. The laser light source control circuit sets, to a threshold value, an amount of the emitted light obtained when output of the light detector is saturated, and controls an amount of the emitted light such that the amount of the emitted light is less than the threshold value.