US 12,078,309 B2
Lamp unit
Ryuho Sato, Shizuoka (JP); and Takahiko Honda, Shizuoka (JP)
Assigned to KOITO MANUFACTURING CO., LTD., Tokyo (JP)
Appl. No. 17/796,036
Filed by KOITO MANUFACTURING CO., LTD., Tokyo (JP)
PCT Filed Jan. 29, 2021, PCT No. PCT/JP2021/003404
§ 371(c)(1), (2) Date Jul. 28, 2022,
PCT Pub. No. WO2021/157495, PCT Pub. Date Aug. 12, 2021.
Claims priority of application No. 2020-019408 (JP), filed on Feb. 7, 2020; and application No. 2020-125312 (JP), filed on Jul. 22, 2020.
Prior Publication US 2023/0097767 A1, Mar. 30, 2023
Int. Cl. F21S 41/25 (2018.01); F21S 41/29 (2018.01)
CPC F21S 41/25 (2018.01) [F21S 41/295 (2018.01)] 17 Claims
OG exemplary drawing
 
1. A lamp unit that irradiates light emitted from a light source and reflected by a spatial light modulator, toward a front of the lamp unit through a projection lens,
wherein the projection lens is constituted by a plurality of lenses disposed side by side in a front-rear direction of the lamp unit,
the plurality of lenses are supported by a common lens holder, and
the plurality of lenses include:
a glass lens configured by a biconvex lens and located on a rearmost side of the lamp unit; and
at least two resin lenses including a biconcave lens and a plano-convex lens, and located other than the rearmost side of the lamp unit.