Patent ID: 11878622
Assignee: KOITO MANUFACTURING CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  G  F  H | IPC B  F  G  H

Claim 9:
10. A vehicle lamp comprising:
a lamp housing;
a lamp cover that covers an opening of the lamp housing;
an illumination unit disposed in a lamp chamber formed by the lamp housing and the lamp cover; and
a light guide member that is disposed in a manner of facing a radar so as to hide, from the outside of a vehicle, at least a part of the radar disposed outside the lamp chamber so as to acquire radar data indicating a surrounding environment of the vehicle by emitting radio waves toward the outside of the vehicle and that is configured to transmit the radio waves emitted from the radar,
wherein the light guide member is configured to emit light toward the outside of the vehicle,
wherein the light guide member has
a first surface that faces the radar,
a second surface located at a side opposite to the first surface, and
a plurality of steps formed on at least one of the first surface and the second surface,

wherein the plurality of steps are configured to emit light spreading inside the light guide member toward the outside of the vehicle,
wherein a height or a depth d of each of the plurality of steps satisfies the following condition,

d<λ/8

wherein λ is a wavelength of radio waves emitted from the radar.