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 5:
6. 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;
a radar configured to acquire radar data indicating a surrounding environment of a vehicle by emitting radio waves to the outside of the vehicle; and
a light guide member that is disposed in a manner of facing the radar so as to hide at least a part of the radar from the outside of the vehicle, and is configured to transmit the radio waves emitted from the radar,
wherein the radar is disposed outside the lamp chamber,
wherein the light guide member is configured to emit light toward the outside of the vehicle,
wherein a thickness t1 of the light guide member is defined by the following equation,

t1=λ(2εr11/2)×n 

wherein λ is a wavelength of radio waves emitted from the radar, Ed is a relative permittivity of the light guide member, and n is an integer equal to or larger than 1.