公开(公告)号：US20240329247A1

公开(公告)日：2024-10-03

申请号：US18744333

申请日：2024-06-14

Applicant: DENSO CORPORATION

Inventor： Yuichi TOYOTA ,  Taro BEPPU ,  Chihiro MORIGUCHI ,  Naoki YOSHIMOTO ,  Hiroyuki MATSUBARA ,  Tatsuya YAMASHITA ,  Tadashi ICHIKAWA

IPC: G01S17/42 ,  G01S7/4911

CPC classification number: G01S17/42 ,  G01S7/4911

Abstract: A laser radar device includes a transmission unit, a scanning unit, a distance calculation section, and a movement control unit. The transmission unit transmits laser light that has been subjected to frequency modulation. The scanning unit performs scanning with the laser light. For each of a plurality of partial regions obtained by dividing a laser light scanning region preset as a two-dimensional region which the scanning unit scans with the laser light, the distance calculation section receives the laser light that has been reflected by an object, and calculates a distance to the object in the partial region. The movement control unit controls movement of the laser light so that the laser light moves in the partial region, with Δθ>(1.22*λ/d) being met.

公开(公告)号：US20230239047A1

公开(公告)日：2023-07-27

申请号：US18191332

申请日：2023-03-28

Applicant: DENSO CORPORATION

Inventor： Yuichi TOYOTA ,  Taro BEPPU ,  Chihiro MORIGUCHI ,  Hikaru SASAKI

IPC: H04B10/11 ,  G01S7/4911

CPC classification number: H04B10/11 ,  G01S7/4911

Abstract: An optical scanner includes a light source, an optical phased array, a monitoring light receiving unit, and a signal processing unit. The optical phased array implements scanning by a light beam by individually controlling phases of a plurality of branched lights into which light supplied from the light source is branched, using a scanning phase amount, and radiating light from an antenna array that has a plurality of antenna elements. The monitoring light receiving unit receives light radiated from the optical phased array. The signal processing unit detects characteristics of the light beam from a detection result of the monitoring light receiving unit and generate a phase adjustment amount for correcting the scanning phase amount such that a detection value of the characteristics coincides with a design value prepared in advance.

公开(公告)号：US20230236472A1

公开(公告)日：2023-07-27

申请号：US18191355

申请日：2023-03-28

Applicant: DENSO CORPORATION

Inventor： Chihiro MORIGUCHI ,  Yuichi TOYOTA ,  Taro BEPPU ,  Hikaru SASAKI

IPC: G02F1/29 ,  G02B26/10

CPC classification number: G02F1/292 ,  G02B26/106

Abstract: An optical scanner includes a light receiving unit, a reference light irradiating unit, and a light-receiving-side correcting unit. The light receiving unit includes an optical phased array that implements scanning by a light beam by individually controlling phases of a plurality of branched lights using a scanning phase amount. The reference light irradiating unit generates reference light and irradiate the reference light onto the light receiving unit. The light-receiving-side correcting unit estimates a phase shift amount that occurs in the plurality of branched lights as a result of distortion of a substrate on which the light receiving unit is mounted from a detection result of the light receiving unit onto which the reference light is incident, and sets a phase adjustment amount to be applied to the plurality of branched lights such that the estimated phase shift amount decreases.

公开(公告)号：US20230221444A1

公开(公告)日：2023-07-13

申请号：US18187527

申请日：2023-03-21

Applicant: DENSO CORPORATION

Inventor： Yuichi TOYOTA ,  Taro BEPPU

IPC: G01S17/931 ,  G01S17/32 ,  G01S7/4913 ,  G01S7/481

CPC classification number: G01S17/931 ,  G01S17/32 ,  G01S7/4913 ,  G01S7/4817

Abstract: A LIDAR device performs an emission process of emitting the laser light to surroundings of a vehicle. The emission process includes a scanning process and a resolution adjustment process. The scanning process includes a process of scanning with the laser light a predefined direction that is one of vertical and horizontal directions. A plurality of emission directions include, as four directions, a first direction and a second direction adjacent to each other in the predefined direction, and a third direction and a fourth direction adjacent to each other in the predefined direction. The resolution adjustment process includes a process of making an angle difference between the third and fourth directions less than an angle difference between the first and second directions, and a variably setting process of variably setting the angle difference between the third and fourth directions according to a state variable of the vehicle, as an input.