公开(公告)号：US20240329211A1

公开(公告)日：2024-10-03

申请号：US18741559

申请日：2024-06-12

Applicant: DENSO CORPORATION ,  DENSO WAVE INCORPORATED

Inventor： Hiroshi ASAMI ,  Akira OGAWA ,  Yusuke IMAI

IPC: G01S7/481

CPC classification number: G01S7/4817 ,  G01S7/4814 ,  G01S7/4816

Abstract: A photodetection device includes: a base that defines first and second reference directions perpendicular to each other; a projection holder positioned in the first and second reference directions with respect to the base; a projection unit having a projector held by the base and a projection lens system held by the projection holder on a projection optical axis perpendicular to the first and second reference directions; a first projection shim replaceably interposed between the base and the projection holder, in a first projection gap that extends along the first reference direction; a second projection shim replaceably interposed between the base and the projection holder, in a second projection gap that extends along a projection intersecting direction that intersects the first and second reference directions; and a light projection screw that fixes the projection holder to the base by screwing along the first reference direction.

公开(公告)号：US20230221417A1

公开(公告)日：2023-07-13

申请号：US18178607

申请日：2023-03-06

Applicant: DENSO CORPORATION

Inventor： Hiroshi ASAMI ,  Kazuhisa ONDA ,  Mitsuhiro KIYONO

IPC: G01S7/481

CPC classification number: G01S7/4817 ,  G01S7/4814 ,  G01S7/4813 ,  G01S17/931

Abstract: A laser radar device includes: a light source; a mirror rotatable about a rotation shaft to reflect laser light emitted by the light source; a window; and a detector to detect laser light. The mirror has a low reflection area having a lower reflectance than the other region of the mirror, in a state where a mirror surface faces toward the light source, at position adjacent to the light source than the detector in an axial direction of the rotation shaft and adjacent to the window than a region where the laser light emitted by the light source hits for a first time in a radial direction of the rotation shaft. The window has an inclined posture in which a distance from the rotation shaft is shorter at position adjacent to the detector than at position adjacent to the light source.

公开(公告)号：US20220003973A1

公开(公告)日：2022-01-06

申请号：US17477868

申请日：2021-09-17

Applicant: DENSO CORPORATION

Inventor： Hiroshi ASAMI ,  Yusuke AKAMINE

IPC: G02B13/00 ,  G02B9/60 ,  G02B27/00

Abstract: An imaging optical system of a present disclosure includes, in a sequential order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The fourth lens is configured such that (i) the light output surface has an aspherical concave shape, (ii) the light output surface has a center portion through which an optical axis passes, and a periphery thereof, and (iii) the light output surface has a portion where the negative refractive power becomes gradually weaker from the center portion toward the periphery thereof. The fifth lens has positive refractive power, a light input surface that faces toward the object side, and a light output surface that faces toward the image side. Each of the light input and output surfaces has a convex shape toward a corresponding one of the object side and image side.